The URL can be used to link to this page

Browse Search

Home My WebLink About931604.tiff I, • SIT c NL Ht3EN D,r POTENTIAL HAZARDOUS WASTE SITE LOG S7e Co 000Ooo e) ROTE: The initial identification of a potential site or incident should not be interpreted As a finding of i1:ega1 activity or confirm- ation h:t so actual health or environmental treat exists. All identified sites will be assessed under the EPA's Hazardous Waste Site Enforcement and Response System to determine if a hazardous waste problem actually exists. S NAM County Landfill (Greelsti fl Weld i!i1,rn L.1: 1 )• bLr77 77uIa CITY _ _ STATE ZIP CODE -Greeley Cn Ye 4,3i • SUMMARY OF POTENTIAL OR KNOWN ?RO@LEM { il I i l [ll Waste 'disposalsite survey (Eckhardt list) 043380 DATE OF DATE OETERVIN- PERSON MAKING ENTERED ITEM AVON OR RESPONSIBLE ORGANIZATION ENTRY ON LOG COMPL£- OR INDIVIDUAL TION (EPA. St•r•, Conrr.ctor, Other) -{ TO LOG FORM no.day.pr) 1. ICENTIFICAT1pN OF POTENTIAL PR09LEM• li-g1-'l Torn G,•Sm1T('1� EPA- Sutly LaVerdore_ I ii-2 -79 - - - 2 PRELIMINARY ASSESSMENT _ i27-77 Tr.rn C co-I'd-11) F PA �i:��l I n4erchure 11-ZS'-17 __ APPARENT SERIOUSNESS OF PROBLEM: ❑ NIGH ❑ MEDIUM I] LOW ❑ NONE 0 UNKNOWN I I 3. SITE INSPECTION. EPA TENTATIVE DISPOSITION '-? '~:;;``:!_ _-.Z '�*��'y_ - - a.(check.pPrvp+l.la ilea(•) D.law) �`• ` •�:FJ _—�L•�., .f. .-..7 a. _� �- — -- ,,--......--...L.' _.."..--.7.• •_.--• --' —a I rya,- -..-.-�= -i-•.:N.y _ --,i-77*. ❑ .. NO ACTION NEEDED I wt ti - _ Y..r-'.T'.n. .•- ��---- -..-.mss+ ,.._- ❑ b.INVESTIGATIVE ACTION NEEDED .n` IN ' ❑ e.REMEDIAL ACTION NEEDED u-.•� `?i — — J —_ i ❑ d ENFORCEMENT ACTION NEEDED T r��-. ., � -� — i` . "I, EPA FINAL STRATEGY DETERMINATION• f-_ I _ r _ - S.(cAKk app,oprl.ra-lt s.(a)bolo,.) •+.• ~�^ • r -- -•-.2-.;.:.-\-^-, a a. NO ACTION NEEDED .,ti, .y .k•-••1•.1:--.. - 1.1'. -� - Js CI REMEDIAL ACTION NEEDED. � y '-A'1 -.-. . — �', >'r"•ti . .-.-.{ `_-- _ _ — — -__- — REMEDIAL ACTION NEEDED BUT, ,-,-,....--1:$,...1-..- - ...1.7.:'• _� ❑ C. AVA7 ABLE • 't• .r. NO RESOURCES L •'•`V.S.'' n �,��. ern: .-- - . —.7./...-......4j:-•-ice- - - .1.*K•+•Jr,_:;: ❑4. ENFORCEMENT ACTION NEEDED �� ~ ❑ t11 CASE DEVELOPMENT PLAN PREPARED ".-.',„*.F.:'-..2. ENFORCEMENT CASE FILED OR ❑ (� AGMI NISTAA TINE ORDER ISSUED :�'L=•,t;.1'. 6. STRATEGY COMPLETED I J I EPA Form T2075-1 (1C-79) • ___ J PL0637 9316C4 IV. CHARACTERIZATION OF SITE ACTIVITY Indicate the major site activlty(ies) and details relating to each activity by marking 'X' in the appropriate boxes.x. • ---�I1 A. TRANSPORTER J B STORER 1 X C. TREATER x D. DISPOSER !i PILE I. FILY' a TION .1. LANDFILL �1 RAIL • 2. LANDFARM 12. SHIP I2• SUI.FAC£ IrwPOUNDM EN7 2. INCINERATION 13, BARGE 3 DRUMS 3. VOLUME REDUCTION OPEN DUMP 4. TANK.ABOVE GROUND 4. RECYCLING/RECOVERY • SURFACE IMPOUNDMENT � Y 14. Y:�UC r , J` . TANK.BELOW GROUND f 1i S. CHEM./PHYS. TREATMEN r !S. ml ON GHT DUMPING 15. PIPEL•NE --- —.— .--1--- ,_...j6. OTHER (specify): -- '---- 7.OTHER (specify): C. BIOLOGICAL TREATMENT I6. IN7.NERATION 7. WASTE OIL REPROCESSING '7. UNDERGROUND INJECTION B. SOLVENT RECOVERY I6. OTHER (specify): 9. OTHER(specify): E. SPECIFY DETAILS OF SITE ACTIVITIES AS NEEDED 1 J ��` Y�C r LAD.l�-�t1. N USDA t -1J�0, �.J,N) erg'"''��y (�inse-�� 1`/��cJ• J+ V. WASTE RELATED INFORMATION A. WASTE TYPE DI UNKNOWN X2 LIQUID '713. SOLID 74. SLUDGE QS. GAS B. WASTE CHARACTERISTICS 1. UNKNOWN 72. CORROSIVE I-13. IGNITABLE 04 RADIOACTIVE ES HIGHLY VOLATILE F16. TOXIC 1.07 REACTIVE 78. INERT 09 FLAMMABLE ri10. OTHER (specify): C. WASTE CATEGORIES 1. Are p_. records of wastes available? Specify items such as manifests, inventories, etc. below. Z4-O. te Art.-e s (` //1-.44-4 LAID$ pt A-Ns J . 2. Estimate the amount(specify unit of measure)of waste.by category; mark 'X' to indicate which wastes are present. SOLVENTS d. CHEMICALS e. SOLIDS I.OTHER ■. SLUDGE b. OIL C. AMOUNT AMOUNT AMOUNT AMOUNT AMOUNT � J AMOUNT L,..4/41,‘ ,�ji �, JIL I' UNIT OF MEASURE UNIT OF MEASURE UNIT OF MEASURE UNIT OF MEASURE. UNIT~O`F MEASURE UNIT OF MEASURE 'X -}1�f_/, G ''\ x 1 1 1 t'A B O F<A TORY ..X• X III PAIN T, ,X, (1)OILY .XI IIIHALOG ENATED L—..III ACIDS (j-y-111 F{IY ASH PHA ORAEUT. 1 PIGMENTS WASTES SOLVENTS L 1 f21METALS MI(21OTHER(speCIfY)t 12)NON-HALOGNTO. 121 PICKLING 121 ASBESTOS 121HOSPITAL SOLVENTS LIQUORS SLUDGES 1 1310 THER(specity): 131MILLING/ I31 RADIO AC TIV£ (31CAU5 TICS MINE TAILINGS 131 POTW `, FERROUS Y141MUNICIPAL 141ALUMtNUM 14)PESTIC ID E3 141 SMLTG. WASTES _/tY. SLUDGE ISIDYES/INKS NONFERROUS 161OTHER(speCi(y): k ��1610THER(speCtfy)= IS1 SMLTG. WASTES 161 0 T HE R(specify): 161CYANIOE 171 PHENOLS IBIHALOG ENS 19I PCB C B ,� IIDIMETALS 1 ":k 1111OTHER(epeClfy) EPA r orm 72070.2 (10-74) PAGE 2 OF 4 Continue On Page 3 0 aril 1"W V. WASTE RELATED INFORMATION (contcnued) 3. LIST SI.aSTANCES OF GREATEST CONCERN WHICH MAY BE ON THE SITE (place In de.cendina order of hazard). • 4. ADDITIONAL COMMENTS OR NARRATIVE DESCRIPTION OF SITUATION KNOWN OR REPORTED TO EXIST AT THE SITE• N° tti\I vrw N cep l Al"4 a -2.,*eft c. I.A.,,AAID t N Ca. r / 1 Vi. HAZARD DESCRIPTION B. C• D.DATE OF POTEN- ALLEGED INCIDENT E.REMARKS A.TYPE OF HAZARD TIAL INCIDENT (mo.,dey,yr.) HAZARD (mark 'X') (mock 'X') I. NO HAZARD , • 2. HUMAN HEALTH NONWORKER 3• INJURY/EXPOSURE 4. WORKER INJURY CONTAMINATION a' OF WATER SUPPLY CONTAMINATION 0' OF FOOD CHAIN CONTAMINATION 7' OF GROUND WATER CONTAMINATION a. OF SURFACE WATER 7 DAMAGE TO FLORA/FAUNA 10. FISH KILL CONTAMINATION t 1 OF AIR 12. NOTICEABLE ODORS 19. CONTAMINATION OF SOIL 14. PROPERTY DAMAGE IS. FIRE OR EXPLOSION SPILLS/LEAKING CONTAINERS/ 10. RUNOFF/STANDING LIQUIDS SEWER.STORM 17. DRAIN PROBLEMS 15. EROSION PROBLEMS IS. INADEQUATE SECURITY 20. INCOMPATIBLE WASTES 21. MIDNIGHT DUMPING 2 2. OTHER(speCIty): 'c PA Form T2070-2 (10-791 PAGE 3 OF 4 Continue On Reverse V V VII. PERMIT INFORMATION A. INDICATE ALL APPLICABLE PERMITS HELD BY THE SITE. 7 1 NPDES PERMIT 2 SPCC PLAN i i 3. STATE PERMIT(specify). 4 AIR PERMITS 7.X.{.5. LOCAL PERMIT )_11 6. RCRA TRANSPORTER 7 RCRA STORER Li 8 RCRA TREATER � 9 RCRA DISPOSER 10. OTHER (specify): - B. IN COMPLIANCE' s.S4 1. YES n 2 NO 3 UNKNOWN 4 WITH RESPECT TO(list regulation name & number): VIII. PAST REGULATORY ACTIONS A. NONE B. YES(summarize below) -r IX.INSPECTION ACTIVITY (past or on-going) 7 A NONE LX B. YES(complete items 1,2,3, & 4 below) 2 DATE OF 3 PERFORMED I TYPE OF AC T'V'7Y PAST ACTION BY: 4.DE5CRIPTION (mo.,day,&yr.) (EPA/State) (1,()1A'( . •iJ . cp" 8- nr' (.SAL w , tri.0• X. REMEDIAL ACTIVITY (past or on-going) A. NONE n B. YES(complete items 1,2,3, & 4 below) 2.DATE OF 3.PERFORMED 4.DESCRIPTION I '1.TYPE OF ACTIVITY PAST ACTION BY: (mo..day,&yr.) (EPA/State) 1 r • NOTE: Based on the information in Sections III through X, fill out the Preliminary Assessment (Section II) information on the.first page of this form. EPA Form T2070.2 (10-79) PAGE 4 OF 4 If Enseco i METHOD BLANK REPORT "C'"""C°"°'"r Metals Analysis and Preparation Reporting Anal to Y Result Units Limit .. Test: HG-CVAA-AD -- Matrix: AQUEOUS QC Lot: 30 MAR 92-6A QC Run: 30 MAR 92-6A 40 Mercury ND mg/L 0.00020 ' Test: HG-CVAA-AD Matrix: AQUEOUS t QC Lot: 30 MAR 92-68 QC Run: 30 MAR 92-68 I Mercury ND mg/L 0.00020 Test: ICP-AT Matrix: AQUEOUS •2 QC Lot: 30 MAR 92-6D QC Run: 30 MAR 92-6D .y Barium ND mg/L 0.010 i Cadmium ND mg/L 0.0050 Calcium ND mg A Chromium ND mg/L 0.010 , i _ "on ND mg/L 0.10 ;nesium ND mg/L 0.20 anganese ND Potassium ND mg/L 0.010 Silver ND m /L 510 Sodium ND mg/L 0.010 mg 5./L 5.0 Test: HG-CVAA-AT Matrix: AQUEOUS QC Lot: 30 MAR 92-6A QC Run: 30 MAR 92-6A Mercury ND mg/L 0.00020 Test: SE-FAA-AT Matrix: AQUEOUS s.` QC Lot: 30 MAR 92-6D QC Run: 30 MAR 92-6D Selenium ND mg/L 0.0050 { I i F- 931061 I MAJOR DIVISIONS GRAPHIC GROUP TYPICAL SYMBOL SYMBOL DESCRIPTIONS .r.,;.._. ;:c. CLEM ('L%A/ WELL-GRAM GRAVELS GRAVEL-SAAR GRAVEL GRAVELS •. ,�:. L..7 VI nituRES. USE OR No FINES AND y ' • • GRAVELLY ssZ`TNES) GP GRAVELS.POORLY-GRAMS VELS, GRAVEL-. COARSE • SAM wifuR • y SAES. U E OR NO /1NES . GRAINED •I II• SOBS man COARSE NR OZ Of GRAVELS I {I .i,; G M SILTY GRAVELS. GRAVEL-SAM-SW OR WITH M XT M6 i San FINES M: .; • ZR Fawn IRM \�.\�\\\ G C Cum GRAVELS. GRAVEL-SAx0-GAT Tu FIxFsi ,`��\\1\ l.. NImIRFs SAND CLEAN WELL-GRADED SANDS. GRAVELLY SAMOS. - AND SAND . SW UTTLE OR MO TINS MORE NAM SOS SANOY Of MATERIAL IS SOBS LEES THANazzC POORLY-CRAM 510x05. GRAVELLY NO. 200 SIEVE SIZE SS FINE J P SANDS. Ural OR NO FINES LESS TXAN SO>.OR i 3+ 1 iiii COOK[ TRACTOR SANDS WITH {]1:1:111: ' 1 1• S M RTY WANDS. SANG-SILT tORMRES SMOG O NO. E FINES 1 DR TXAx '\.\,�\ IR FINES) .�; \ S C CLAYEY SAN'S, SAND-CLAY MIXTURES ' C,' I I I i 1 I I INORGANIC MSS ARO VERY TINE SAMOS. I ' I , /L ROCK FLOUR, Sa1T OR CLAYEY SAE III IV' � CLAYEY SILTS VIN SUDO SILTS J\ FINE �� MNR �\ \\.\\\ INORGANIC Gun OF LOW TO Sera GRAINED AND FMS T"AA SOX C L .n. CUTS. LEAN Gun OT SOILS CLAYS 0 L ORGANIC MIS VC ORGANIC SRLT CUTS OF UM PUSMrtT III II M H INORGANIC SUS. MICACEOUSOlt IAD ;; GATOMACEOUS TINE SAND OR 41.17NOME MAN SOX II I'll I SILLS Of MAMMAL K sus TN"" C H TAOa•sw art s AND OLIO UMW INORGANIC CUTS OR ANN PLASIIGTT. L'3R-€MAN ZMX FAT CUTS CLAYS 0 H ORCAI.IC CLAYS OF MEDIUM TO xIMI H PUSnaTY..ORGANIC SILTS HIGHLY ORGANIC SOILS = PT RAT. WAILS. SWAMP SOILS MTh NCH ORGANIC CONTENTS ROM: WK MOMS AR MILD TO RINCAT EORONNME�SOIL GAwNnlon. � i CUYSTONE F ROCK TYPES mu SGolder SOIL AND ROCK CLASSIFICATION CHART SSOC�11e8 Denver, Colorado CUENr/PRO4ECT DRAWN OPH ions JUNE 1992 408 No. 923-240.3 WASTE SERVICES CORPORATION GN GK SAC S:xE -NOT TO SCALE DMG N07REV. NO. 2A03C AS.ONC CENTRAL WELD SANITARY LANDFILL REVIEW© E FlL qcy NO. hGURE N0. 93106t Well No. GWMW-5N r— I Boring No. X-Ref: MONITORING WELL CONSTRUCTION SUMMARY 0 Survey Coords: Northing: 370688.26 ft. Elevation Ground Level 4759.49 ft. NGVD Fasting: 2193894.44 6. Top of PVC Casing 4761.92 ft. NGVD Drilling Summary: Construction Time log: Start Finish Total Depth 30.5 ft. Task Date Time Date Time Borehole Diameter 8.25 in. Drilling -5 \ \ Driller 9 Stickup Rick Rogers neers Height2.43 ft. Hollow Stem Auger 3124192 ,e0o 3725/98 0745 D Geophys.Logging WA NA NIA N/A Ri819S) Stem Auger Casing:D- Sch.40 PVC 8785182 0746 812 5782 0730 —10 4. ID Drilling Fluid air _ _____ _ Filter Placement: 3125192 0746 3125182 oels Protective Casing 7' anodized aluminum Cementing: 3125/92 0615 3/2992 0900 Development 3/30/92 0730 3/30/92 1530 -15 Well Design &Specifications •:::Basis:Geologic Log X Geophysical Log Ji ‘ Casing string(s): C— Casing S= Screen Well Development Well was developed for eight hours by hand bailing Depth String(s) Elevation with a stainless steel bailer • + 2.43 - 20.0 C1 4761.92 - 4739.49 -20 •• _ 20.0 - 30.0 S1 4739.49 - 4729.49 - - Stabilization Test Data: • Time pH Spec. Cond.` Temp(°F) 25 :: — Casing: Cl 2' diameter Sch.40 PVC 0730 6.98 6.44 51.3 flush threaded w/0-rings, 0955 711 6.38 60.1 Teflon taped joints 1145 7.14 6.14 59.4 1345 7.11 6.18 60.9 Screen: St 2' diameter Sch.40 PVC 1530 720 5.92 582 flush threaded w/0-rings,Teflon 'umhos/cm x 1000 -30 i: : ..... taped joints.0.010" machine cut slots Recovery Data: N/A Alter Pack: 10/20 Silica Sand(30.5'-17.0) Q. So= 16/40 Silica Sand(17.0'-16.5') 100 90 60 -35 Grout Seal:Portland Cement/Bentonite Powder '° e° 8:1 mixture(13.5'-2.0') a eO .° x 00 20 Bentonite Seal: 3/8" Bentonite chips(16.5'-13.5') 1° Surface Seal: Concrete(2.0'-0.0') 0 o 2 J. 6 e 10 -40 TIME(Minutes) Comments: Not to Scale Supervised by J.Cremeens Site Central Weld Sanitary Landfill Job Number 913-2403 File Name 2403GW5N 931061 Well No. GWMW-06 r---1 Boring No. X-Ref: MONITORING WELL CONSTRUCTION SUMMARY Survey Coords: Northing: 1046.40 ft. Elevation Ground Level 4769.46 ft.MSL -0 \ \ Easing: 9.16 ft. Top of PVC Casing 4772.07 ft. MSL Drilling Summary: Construction Time log: Start Finish Total Depth 30.0 ft. Task Date Time Date Time Borehole Diameter 7.25 in. Drilling -5 Casing Stickup Height 2.61 ft. Hollow Stem Auger ]nano ,a]0 Vialea 1215 Driller Drilling Engineers Rick Rogers • Geophys.Logging NIAwA NIA NIA Rig CME-55 Casing: - Bit(s) Hollow Stem Auger 2'ID Sch.40 PVC 2118192 1300 2118/92 1315 -10 _ : = Drilling Fluid none - Filter Placement: view 1315 2115/92 1400 - Protective Casing 6' x 6', 7' long, Cementing: 2118/92 1.99 21,8/02 7410 - anodized aluminum Development 919192 0935 919192 1155 -15 _ Well Design &Specifications — — — — • • - Basis: Geologic Log X Geophysical Log - Casing string(s): C- Casing S- Screen Well Development Well was developed by four hours of pumping - Depth String(s) Elevation with a Hydrostar pump — + 2.61 - 9.0 C1 4772.07 - 4760.46 -20 . - 9.0 - 29.0 Si 4750.46 - 4740.46 - - - Stabilization Test Data: 25 - Time I PH I Spec. Cond.1 Temp CF) I Casing: Cl 2" diameter Sch.40 PVC 1110 5.13 4.82 54.0 - flush threaded w/0-rings, 1120 7.13 5.93 50.5 Teflon taped joints 1205 6.00 4.97 65.0 - 1335 6.28 5.40 53.7 Screen: S1 2" diameter Sch.40 PVC 1340 I N/A 5.30 54.8 • flush threaded w/O-rings,Teflon • umhos/cm x 1000 -30 • • taped joints, 0.010' machine cut slots Recovery Data: Filter Pact 10/20 Silica Sand'(30.0'-7.0') Q= 2 So= 5.45 20/40 Silica Sand(4.0'-3.5') 100 I� I I I 90 eo 70 -35 Grout Seal:Portland Cement/Bentonite Powder ee I 8:1 mixture(3.5'-0.0') .o lit 3e Bentonite Seal: 3/B" Bentonite chips(7.0'-4.0') so0 I o III I I O 2 . a e to -40 TIME(Minutes) Comments: Not to Scale Supervised by J.Cremeene Site Central Weld Sanitary Landfill Job Number 913-2403 Fla Name 2403GW6 331064 1 r---1 Well No. GWMW-07 Boring No. X-Ref: MONITORING WELL CONSTRUCTION SUMMARY t7- -0 Survey Coords: Northing: 514.378 Elevation Ground Level 4760.58 ft. MSL • Easting: 591.51 it Top of PVC Casing 4763.26 ft.MSL Drilling Summary: Construction Time log: Stan Finish • Total Depth 25.5 ft. Task Date Time Date lime • Borehole Diameter 7.25 in. Drilling -5 • Casing Stickup Height 2.68 ft. Hollow stem Auger v�7/92 0645 211- 192 1000 Driller Drilling Engineers - Rick Rogers — — -- Geophys.Logging N/A N/A NIA N/A Rig CME-55 Casing: — — — — • Bit(s) Hollow Stem Auger r 10 Sch.40 PVC 2117/92 1000 2117/92 ,MI5 —10 • Drilling Fluid none '— Filter Placement: 2/12/92 1015 2117192 1os • Protective Casing 7 anodized aluminum Cementing: 2177/92- 1045 2/17192 1130 Development 3120/92 1320 3120/92 1530 75 _ •. Well Design &Specifications 0956 3/21/92 0422 312,012 ••Basis: Geologic Log X Geophysical Log Casing string(s): C- Casing S- Screen Well Development Well was developed by four hours of pumping Depth String(s) Elevation with a Hydrostar pump +2.68 - 13.0 C1 4763.28 - 4747.58 -20 . _ 13.0 - 23.0 S1 4747.55 - 4737.58 - - Stabilization Test Data: _29 Time pH I Spec. Cond.' Temp(IF) Casing: C1 2' diameter Sch.40 PVC 1335 5.84 3.90 54.1 flush threaded w/0-rings. 1510 5.80 5.80 54.4 Teflon taped joints 0832 6.06 5.06 49.8 0915 6.12 5.74 50.1 Screen: Si 2" diameter Sch.40 PVC 0950 6.10 5.61 50.1 30 flush threaded w/0-rings.Teflon ' umhos/cm x 1000 taped joints.0.010' machine cut slots Recovery Data: Filter Pack: 10/20 Silica Sand(25.0'-8.0') 0= 1.4 So= 6.1 16/40 Silica Sand(8.0'-6.0') IOC 16/40 Silica Sand(3.0'-25') so I I +--I -� -35 Grout Seal:Portland Cement/Bentonite Powder a 7O ..-- • g e° 8:1 mixture(2.5'-0.0') ae I .° 30 20 10 ° I I I I 1 Bentonite Seal: 3/8" Bentonite chips(6.0'-3.0') 0 2 6 0 10 12 14 10 IS -40 TIME(Minutes) Comments: Not to Scale Supervised by J.Cromer* Site Central Weld Sanitary Landfill Job Number 913-2403 File Name 2403GW7 91.46' Well No. GWMW-08 . �� Boring No. X-Ref: — MONITORING WELL CONSTRUCTION SUMMARY Survey Coords: Northing: 373232.05 ft. Elevation Ground Level 4831.74 ft. NGVD _0 NEasting: 2191496.14 ft. Top of PVC Casing 4833.98 ft. NGVD N' Drillin Summary: Construction Time log: g k Start Finis \ Total Depth 81.0 ft.Borehole Diameter 8 0 In. Drilling Task Date Time Date Time ng 10 \ Casing Stickup Height 2.24 ft. Hollow Stem Auger 3/4/02 1230 314/92 1700 NDriller Drilling Engineers Coring 3/9/92 0830 314/92 1330 \ Rick Rogers — — _ — \ Geophys.Logging WA NIA NIA WA Rig CME-55 Casing: — — _ - \ Bit(s) Hollow Stem Auger, e"Steel 315/92 1000 315/92 1300 20 \ Tr co a roller,NX Core r i0 Sch.40 PVC 3110/92 1330 3110/92 1400 \ Drilling Fluid none _ — - \ Filter Placement: 3111/92 1000 3/11/92 1130 \ Protective Casing 7' anodized aluminum Cementing: 3/11/82 1130 3/11/92 1230 Development 3118/92 1245 3118/92 1630 \ Well Design &Specifications — — — — • -30 — — — \ Basis: Geologic Log X Geophysical Log y Casing string(s): C-Casing S. Screen Well Development Well was developed by four hours of pumping Depth String(s) Elevation with a Hydrostar pump - + 2.24 - 70.0 Cl 4833.98 - 4781.74 -40 - 70.0 - 80.0 31 4761.74 - 4751.74 1.0 - 44.0 C2 4830.74 - 4787.74 - - Stabilization Test Data: Time pH Spec. Cond.' Temp('F) -50 • .--Casing: C1 2" diameter Sch.40 PVC 1256 5.04 6.75 47.0 5.84 7.06 54.4 C2 6elD steelc joints 1545 in Teflon e0-rings, 55.80.78 7.070 54.9 53.7 Screen: Si diameter Sch.40 PVC 16 20 7.10 52.9 threaded w/0-rings,Teflon • umhos/cm x 1000 -60 flush -- taped joints,0.010' machine cut slots Recovery Data: Alter Pack:10/20 Silica Sand(81.0'-67.0') Q= 0.89 y So= 48.2 110 ^100 TOO -70 ::: — Grout Seal:Portland Cement/Bentonite Powder io 8:1 mixture(64.0'-3.0') so y 40 - Je - z Bentonite Seal: 3/8" Bentonite chips(67.0'-64.0') o . 0 _ Surface Seal: Concrete(3.0'-0.0') 0 4. e 12 1 e 20 24. 2e az TIME(Minutes) `" Comments: Centralizers located at 35'and 50'. Hollow stem auger used from 0.0'-65.0'. NX core used from 65.0'-79.8'.Tricone bit used from 65.0'-79.8. Not to Scale Supervised by J.Cremeens Site Central Weld Sanitary Landfill Job Number 913-2403 File Name 2403GW8 931061 Well No. GWMW-09 • I- Boring No. X-Ref: MONITORING WELL CONSTRUCTION SUMMARY -0 Survey Coords: Northing: 373248.78 ft. Elevation Ground Level 4836.22 ft. NGVD lj Fasting: 2192751.58 h. Top of PVC Casing 4838.37 ft. NGVD Drilling Summary: Construction Time log: Start Finish Total Depth 75.0 ft. Task Date Time Date lime Borehole Diameter 5.63 in. Drilling -10 Casing Stickup Height 2.15 ft. Auger to 35' x24192 1300 2/24192 1430 Driller Drilling Engineers Coring to 72' 2125192 „30 2/x192 1345 Rick Rogers Ream to 75' 2/x192 1500 2226/92 1530 �\c Geophys.Logging WA WA _NIA WA Rig CME-55 Casing: • Bit(s) Hollow Stem Auger, e' Steel 2/24192 1430 2/24/92 1830 -20 Tri-cone roller,NX Core 2'ID Sch.40 PVC 2126/92 1630 2/26/92 1845 Drilling Fluid air Filter Placement: vain teed 2/25192 fns Protective Casing 6" x 6", 7' long, Cementing: 2126/92 1715 2/26/92 1730 anodized aluminum Development 3117/92 ,230 3/17/92 1540 ;� 3/18/92 0830 3118/92 0944 -30 Well Design &Specifications _ _ : Basis: Geologic Log X Geophysical Log Casing string(s): C Casing S-Screen Well Development : _ Well was developed by four hours of pumping = Depth String(s) Elevation with a Hydrostar pump _ " 2.15 - 65.0 Cl 4838.37 - 4771.22 -40 &5.0 - 75.0 51 1.0 - 35.0 C2 4835.22 47 51.22 -- 480122 : Stabilization Test Dpeta. \ - - Cond.` Temp(°F) -50 • Casing: Cl 2" diameter Sch.40 PVC 1305 6.68 4.92 50.4 flush threaded w/0-rings, 1405 7.10 5.90 47.7 Teflon taped joints 1515 7.38 5.93 47.8 C2 6" ID steel casing 1540 7.93 5.61 48.8 Screen: S1 2" diameter Sch.40 PVC 0842 7.32 4.98 52.9 flush threaded w/0-rings,Teflon 0935 N/A 4.86 51.7 -50 taped joints, 0.010' machine cut slots * umhos/cm x 1000 Recovery Data: • Filter Pack: 10/20 Silica Sand(75.0'-62.0') Q= 0.15 So= 58 — — 100 90 SO -70 I.i. = Grout Seal:Portland Cement/Bentonite Powder eo ��— �- 8:1 mixture(50.0'-2.0') °O _ .o Bentonite Seal: 3/8" Bentonite chips(62.0'-50.0') % 10 Surface Seal: Concrete(2.0'-0.0') 0 0 20 +4r e0 50 100 -80 TIME(Minutes) Comments: Centralizers located at 15,30' and 50'. Hollow stem auger used from 0.0.- 35.0'. NX core used from 35.0-722'.Tri-cone bit used from 35.0'-75.0'. Not to Scale Supervised by J.Cremeens Sits Central Weld Sanitary Landfill Job Number 913-2403 File Name 2403GW9 91O6* Well No. GWMW-10 r-1 Boring No. X-Ref: MONITORING WELL CONSTRUCTION SUMMARY -0 Survey Coords: Northing: 371940.04 ft. Elevation Ground Level 4813.70 ft.NGVD I = Easting: 219327.00 ft. Top of PVC Casing 4816.09 ft. NGVD - Drilling Summary:• Construction Time log: N, = Start Finish Total Depth 61.0 ft. Task Date Time Date Time - Borehole Diameter 8.00 in. Drilling — — _ -10 _ Casing Stickup Height 239 h. Hollow Stem Auger 3116/92 1100 3115112 1230 • - Driller Drilling Engineers Core 3119192 0500 3/191122 1200 Rick Rogers - Geophys.Logging WA N/A N/A NM = Rig CME-55 Casing: — —llow Stem er, 6' Steel wtoisf2 3/19192 15 -20 Bit(s) TnOcone roller,MX Core 2•ID Sch.40 PVC 3119/92 1315 3/19/92 1346 — Drilling Fluid air Filter Placement: 3119192 1345 3119/92 1430 — Protective Casing 6" x 6", 7' long, Cementing: 3/19/92 1430 3/19192 1516 _ anodized aluminum Development 3/24/92 1232 3/24192 ,630 -30 Well Design &Specifications _ _ _Basis: Geologic Log X Geophysical Log = Casing string(s): C= Casing S= Screen Well Development - - Well was developed by four hours of pumping = Depth . String(s) Elevation with a Hydrostar pump + 2.39 - 50.0 C1 4816.09 - 4763.70 -40 _ 50.0 - 60.0 51 4763.70 - 4753.70 - 1.0 - 43.0 C2 4812.70 -4770.70 - - Stabilization Test Data: Time pH Spec. Cond.* Temp('F) -50 Casing: C1 2" diameter Sch.40 PVC 1335 7.45 5.31 59.4 flush threaded w/0-rings, 1346 7.33 5.30 57.3 _ Teflon taped joints 1525 7.46 5.42 59.6 C2 6" ID steel casing 1559 7.34 5.52 57.4 Screen: S1 2" diameter Sch.40 PVC flush threaded w/0-rings,Teflon • umhos/cm x 1000 -60 — taped joints,0.010" machine cut slots Recovery Data: Filter Pack: 10/20 Silica Sand(61.0'-47.0') 0= 0.16 So= 47.1 100 90 50 -70 Grout Seal:Portland Cement/Bentonite Powder '° -.1..---.-'...-4.--'° ../-'11.- 8:1 mixture(44.0'-20') W ac ' +° 0.e 3° '"---'- 20 ` Bentonite Seal: 3/8" Bentonite chips(47.0'-44.0') ,a 0 Surface Seal: Concrete(2.0'-0.0') 0 1 o z° 30 40 °o -80 TIME(Minutes) Comments: Centralizers located at 15' and 30'. Hollow stern auger used from 0.0'-45.0: NX Core used from 45.0'-59.3'.Tri-cone bit used from 45.0'-60.0'. Not to Scale Supervised by J.Cremeens Site Central Weld Sanitary Landfill Job Number 913-2403 File Name 2403GW10 9LL31n6- - Well No. GWMw-11 r----i Boring No. X-Ref: MONITORING WELL CONSTRUCTION SUMMARY Survey Coords: Northing: 370657.79 ft. Elevation Ground Level 4754.31 ft. NGVD Basting: 2192380.76 ft. Top of PVC Casing 4756.82 ft. NGVD Drilling Summary: Construction Time log: Start Finish Total Depth 61.0 ft. Task Date Time Date Time 1 Borehole Diameter 8.00 in. Drilling -10 Casing Stickup Height 2.51 ft. Hollow Stem Auger 3rsro2 1400 312/92 1825 `, Driller Drilling Engineers Core 313/92 0930 312122 1e1s Rick Rogers CGeophys.Logging w3 NIA t. ."-IA -N/A �.. Rig CME-55 Casing: • Bit(s) Hollow Stem Auger, 6"Steel 3/2.192 1825 3/2192 1646 -20 \ �., Tri-cone roller,NX Core 2'ID Sch.40 PVC 3/3/92 1815 3/3192 1630 Drilling Fluid air _ _ _ _ Filter Placement: 3/312z 1870 3/3192 1716 Protective Casing 7' anodized aluminum Cementing: 3/3192 1715 3/3/92 1830 Development 312'4/92 1057 3/33792 1457 Well Design &Specifications — — - -30 \ � - — — — Basis: Geologic Log X Geophysical Log Casing string(s): C-Casing S-Screen Well Development Well was developed by four hours of pumping Depth String(s) Elevation with a Hydrostar pump 4 2.51 - 50.0 Cl 4758.82 - 4704.31 -40 50.0 - 60.0 Si 4704.31 - 4694.31 1.0 - 44.0 C2 4753.31 - 47.131 - - Stabilization Test Data: Time pH Spec. Cond." Temp("F) -50 — • - Casing: C1 2" diameter Sch.40 PVC 1113 7.07 4.25 58.9 flush threaded w/0-rings. 1410 7.35 5.36 60.0 Teflon taped joints 1430 7.41 5.35 60.8 C2 6" ID steel casing 1445 7.36 5.54 59.6 .Screen: S1 2" diameter Sch.40 PVC .. - flush threaded wl 0-rings.Teflon * umhos/cm x 1000 -60 .. taped joints,0.010" machine cut slots Recovery Data: Filter Pack: 10/20 Silica Sand(60.0'-47.0') Q. So= 15.5 oa 90 1� eo -70 Grout Seal:Portland Cement/Bentonite Powder at ao , 8:1 mixture(44.0'-3.0') g «o K 30 20 Bentonite Seal: 3/8" Bentonite chips(47.0'-44.0') 10 0 Surface Seal: Concrete(3.0'-0.0') 0 2 4 6 5 10 12 14 1 6 la -80 TIME(Hours) Comments: Centralizers located at 10'and 25'. Hollow stem auger used from 0.0"-45.0: NX Core used from 45.0'-59Z.Tri-cone bit used from 45.0'-60.0'. Not to Scale Supervised by J.Cremeens Site Central Weld Sanitary Landfill Job Number 913-2403 File Name 2403GW11 931064 Well No. GwMw-12 ri Boring No. X-Ref: MONITORING WELL CONSTRUCTION SUMMARY -0 Survey Coords: Northing: 370689.86 ft. Elevation Ground Level 4759.40 ft. NGVD Easting: 2193901.48 ft. Top of PVC Casing 4761.93 ft. NGVD Drilling Summary: Construction lime log: Start Finish Total Depth 69.0 ft. Task Date Time Date Time Borehole Diameter 5.63 in. Drilling -10 Casing Stickup Height 2.53 ft. Auger to 46 2/27/02 loo 2Q1102 163U Driller Drilling Engineers Coring to 60' 2/28/93 0000 2/28/92 moo Fes• TT Rick Rogers Ream to 68' 2/20/92 1400 2/25/92 1500 Geophys.Logging NIA N/A N/A N/A Casing: Bit(s) Hollow Stem Auger. . 6" steel 2/22/92 1530 2/27/92 1730 -20 Tri-cone roller.NX Core 2" ID Sch.40 PVC 3//92 0845 312192 0900 Drilling Fluid air • Filter Placement: 3/2192 0900 312/92 1000 Protective Casing 6" x 6",7" long, Cementing: 312192 1000 3/2/92 1030 anodized aluminum Development 3123/92 1651 3/23192 1801 3/24/92 0726 3/24/92 1020 -30 \� ; Well Design &Specifications • Basis: Geologic Log X Geophysical Log Casing string(s): C= Casing S=Screen Well Development Well was developed by four hours of pumping Depth String(s) Elevation with a Hydrostar pump .2.53 - 58.0 C1 4761.93 - 4701.40 -40 58.0 - 68.0 sl 4701,40 - 4891.40 1.0 - 45.0 C2 4758.40 - 4714.40 - - - 777r. - - Stabilization Test Data: Time pH Spec. Cond.' Temp("F) -50 \ Casing: C1 2" diameter Sch.40 PVC 1801 7.24 5.83 56.1 flush threaded w/0-rings, 0809 7.18 8.34 53.3 Teflon taped joints 0904 7.39 8.49 54.6 C2 6" ID steel casing 0953 7.43 8.05 55.9 .Screen: Si 2" diameter Sch.40 PVC 1000 7.51 8.35 54.4 — •=j. flush threaded w/0-rings.Teflon 1014 7.04 7.57 59.7 -60 :: - -_ taped joints. 0.010" machine cut slots • umhos/cm x 1000 Recovery Data: Filter Pack:10/20 Silica Sand(68.0'-55.0') 0= So= 30.9 t°° 90 so -70 Grout Seal:Portland Cement/Bentonite Powder c 00 ao 8:1 mixture(520'-3.0') eO .. / JO -.--+".-....— 20 Bentonite Seal: 3/8" Bentonite chips(55.0'-52.0') 10 ° Surface Seal: Concrete(3.0'-0.0') 0 2 4 0 -80 TIME(Hours) Comments: Centralizers located at 12' and 32'. Hollow stem auger used from 0.0'-45.0: . NX Core used from 45.0'-61.8'.Tri-cone bit used from 45.0' '-69.0. Not to Scale Supervised by J.Cremeens Site Central Weld Sanitary Landfill Job Number 913-2403 File Name 2403GW12 93106* 1 Well No. GWMW-13 r--I Boring No. X-Ref: I MONITORING WELL CONSTRUCTION SUMMARY Survey Coords: Northing: 371888.95 ft. Elevation Ground Level 4769.99 ft. NGVD -0 I Easting: 2191477.48 ft. Top of PVC Casing 4772.18 ft. NGVD I i r Drilling Summary: Construction Time log: Start Finish • : Total Depth 61.0 ft. Task Date Time Date Time - • Borehole Diameter 8.25 in. Drilling -10 Casing Stickup Height 2.19 ft. Auger 2/20/92 1400 2/2019¢ 1516 Driller Drilling Engineers Coring 2/21/92 0915 2/20/92 1400 Rick Rogers Ream 2/21192 1415 2/21/92 1446 Geophys.Logging N/A N/A NIA N/A Rig CME-55 Casing: - ; Bit(s) Hollow Stern Auger. 8' Steel 2/20122 1515 2129/92 1730 -20; Th-cone roller.NX Core 2' ID Sch.40 PVC 2/21/92 1615 2/21/92 1530 Drilling Fluid air Filter Placement: 2/21/92 1530 2/21192 1830 Protective Casing T anodized aluminum Cementing: v21r9-2 Iwo l 2/21/92 1730 Development 10/92 1585 3110052 1720 �2oro2 oaoi 3/20/92 1030 _3a \ ;. . Well Design & Specifications -Basis: Geologic Log X Geophysical Log : •` Casing string(s): C= Casing S= Screen Weil Development _ Well was developed by four hours of pumping = Depth String(s) I Elevation with a Hydrostat pump : + 2.19 - 50.0 C1 14772.18 - 4719.99 -40 - 50.0 - 60.0 S1 4719.99 - 4709.99 1; - 1.0 - 44.0 C2 4768.99 -4725.99 - - - - Stabilization Test Data: Time pH Spec. Cond." Temp(°F) -50 .. - - Casing: Cl 2" diameter Sch.40 PVC 1620 8.20 4.20 45.5 flush threaded W/0-rings. 1638 7.10 4.58 51.0 Teflon taped joints 0905 6.06 4.50 52.6 C2 6" ID steel casing 0923 6.04 4.47 54.3 7.Screen: Si 2" diameter Sch.40 PVC 1020 6.01 4.48 54.1 — flush threaded w/0-rings.Teflon -60 taped joints, 0.010° machine cut sots _ ' umnos/cm x 1000 Recovery Data: Filter Pack: 10/20 Silica Sand(60.0'-47.0') CI= So= 4.35 16/40 Silica Sand(44.0'-43.5') 100 T 1 - ill 1 1 i 70• ��w -70 Grout Seal:Portland CementlBentonite Powder 60 8:1 mixture(43.5'-3.0') °O l 20 / l Bentonite Seal: 3/8" Bentonite chips(47.0'-44.0') 1O 0 Surface Seal: Concrete(3.0'-0.0') 0 40 50 120 160 200 TIME(Minutes) -80 Comments: Hollow stem auger used from 0.0-45.0' _ NX Core used from 45.O-60.T.Tri-cone bit used from 45.0'-60.T. Not to Scale Supervised by J.Cremeena Site Central Weld Sanitary Landfill Job Number 913-2403 File Name 2403GW13 ♦Y201..O6' 1 Well No. GwMW-14 r----1 Boring No. X-Ref: MONITORING WELL CONSTRUCTION SUMMARY Survey Coords: Northing: 371140.54 ft. Elevation Ground Level 4761.24 ft. NGVD i-0 ( . Easting: 2192067.82 ft. Top of PVC Casing 4763.70 ft. NGVD I Drilling Summary: Construction Time log: : : : Start Finish Total Depth 61.0 ft. Task Date Time Date Time Borehole Diameter 8.25 in. Drilling -10 Casing Stickup Height 2_46 ft. Auger 2/17/92 1330 2117/92 1500 Driller Drilling Engineers Coring 2/19192 1200 2/19192 1600 Rick Rogers Ream 2120/92 1000 2/24192 1045 Geophys.Logging N/A WA N/A N/A ". .. Rig CME-55 Casing: Bit(s) Hollow Stem Auger, 9' Steel 2/17/92 1500 2/17/92 1630 -20 Tri-cone roller,NX Core 2' ID Sch.40 PVC 2/20/92 104.5 2120/92 1100 \. Drilling Fluid air Filter Placement: 2/23/92 1100 2/20/92 1200 Protective Casing 7' anodized aluminum Cementing: 2/20/92 1230 2/20/92 1600 - Development 3!21/92 1047 3!21/92 1455 -30 Well Design &Specifications Basis: Geologic Log X Geophysical Log Casing string(s): C= Casing S = Screen Weil Development Well was developed by four hours of pumping Depth String(s) Elevation with a Hydrostar pump + 2.46 - 50.0 C1 4763.70 - 4711.24 140 50.0 - 60.0 S1 4711.24 - 4701.24 L 1.0 - 3$_0 C2 4760.24 -472324 - - - - Stabilization Test Data: - Time pH I Spec. Cond.' Temp('1=) I-50 - Casing: Cl 2' diameter Sch.40 PVC 1056 6.21 4.62 54.0 - flush threaded WI 0-rings, 1103 6.10 4.43 52.6 - Teflon taped joints 1315 6.15 j 5.47 53.1 C2 6' ID steel casing 1425 6.40 5.28 53.2 E- . .Screen: S1 2' diameter Sch.40 PVC 1433 _ 6.26 5.75 51.4 l— : flush threaded wl 0-rings,Teflon I _ -60 - ' taped joints,0.010' machine cut slots ' umhos/cm x 1000 Recovery Data: Filter Pack: 10/20 Silica Sand(60.0'-47.0') Q= So= 6.87 16/40 Silica Sand (42.5'-42.0') 100 I I ( I I { • i 90 I i 1 1 eO i I I l —70 Grout Seal: Portland Cament/Bentonite Powder so i I I i 8:1 mixture(42.0'-3.0') 5o _„.....,...--1 4 �j tI J0 I 20 I t ; Bentonite Seal: 3/8' Bentonite chips(47.0'-42.5') 10 �� 1 1 Surface Seal: Concrete(3.0'-0.0') 0 20 40 e0 e0 100 120 -80 TIME(Minutes) Comments: Hollow stem auger used from 0.0'-41.0'. NX Core used from 41.0'-58.7.Tri-cone bit used from 41.0'-58.T. Not to Scale Supervised by J.Cremeens Site Central Weld Sanitary Landfill Job Number 913-2403 File Name 2403GW14 n_31.064 •Y �.` ',•)0.••:',.;.„.',..-. 1r f ,�yy�, 7 y a W L Wi3.'S '�'1� £JPi$R Wl. v NSW' a .'"*s ,I.47vt,.k p"` •s' xrkh'ki' S :,: i3AN,.' ' . V" � i4tr W ''.Y. .3.11 °nV.MTI r4 ,*:'.r₹r. r "'k:• +I.w G!^G 'F'r'r�A$4 4,,,ow t t `3t'+4S,s tt,tr wq ,hz d5^,t �"3t' `°Lt". a -rr,a ..,, ,s`. �.4 �w "--- ,'.2 gv ..... M >"�*d ",, --.rw'sklnT,„,...si₹.we" +' 9V`•-'• ,---t-._- i_,'4m, '7 '_4_ , cilaii::e+.x1 01!* . Y,Y'4s.*'' r- •,-77 : ,+,<. _,. .. „ -, , • k y .. r • a " S ^ u 4t - P';J. a ,� �' r �: F ,.o k -:+s #44#:: ar'1 3 + 4y y't t1' v '' �"� '• a #.'e1.r s 4 :.ter1 2 7:7,- 'i. Cx v F'lx. ,�• r'S.+ it •� ',kink/a' 1 . 9' � N t-.711,•2'rt3t,s,NeW,Ikt/fr...441.?"..."L4i7ra.,V7.,211,"i‘1.- "v< ` c lyM ry23� �sr , #:24, 't .i , rr � �'ew ,�,. - �* s x �+,, wR w=.Y Y''n, .. ;?,,. ₹.. .e r f (j1 rt,"'7l`: .•.,• "lg. S P .L',tt ; ...ri. '•r s,. 'fll++ f rr • 5 .i •.. w re-:i,R,R's z+$."y{.tilz .kle " u'- ay. J1'�Y'�tv'3" F,' t•.Z4'-. '- -ihr` -4, 4 FF, .' Jr?•t#,. ;.i.°#', , -,..n `o+. ` .;.,. r"'� - r ` •r ,. - , • b -,, _ w � >' r a3 y$� y a' v y.v-:+S ii4r n a -1 , s Y�I.-t ,`*• ## "Yy*:.C a '# ._ y 7•11,--..,. vas's mx.+ '„ ,.r •,.3'wx- ' , A•fl'-,i 'F[ F43' .` ei • t ,,t+'Vfl •k?.?t,'�',' .+zt • aary'A , va ya, vt -- k+* ..-.....n;', w '+J. :',pr,!.-16r v d:' 1'11,. ,ti r^'„' 4 'r fix^; %PhT` n i .^vrllfi V '4'41. Ste r . n no t "t' s+ .: iilr la jRx h ' 47 .. 6Y104X.* 3` P _ ov.�r i n „fel: ”. tt;v 2. RS aY . `,' ,..`,'i2tr1.r a .91ffi':'. „". `r ��'J,s,S"sY, s+*+4''k.M.' ,„dF�k;?t .'5'£r?''rt ao`•`.m'm+{zRT t,,41Y �`7;''-c�,1'. m ,:4 +�,� .Y" .7174/ 14'4 *L'kwr' ..,--it r, . may[ ' «M.fEr'n''th„:1'*;F , .rr 4h ar,4.r ii4pF�Y t+ .'r,'.6� 's'k +".+:4.4 3:.w.e n Fc Pr ".-,t c.5;-&-t-}yt.FK'is Ftrr�t+ ;@ y,xn:.v .S.J n�`.,« ',` a1w'.,''# .a .. r WOK, ., €. +t SA*. n 2 ,X .z 3'x'Y.`v. w £u}, x S"�" f "�A 1r .4^F s,- �3 }- .. it . - v3• . _ } - . a. • • • APPENDIX F . . SAMPLE INTEGRITY DATA SHEETS ^ 3`x. :' "rf F T... �: „„ . . ,.0j'' ^f ; .s:* , .saF��', � , vT :'t`�y. ha-•4,.......r *i"r :1�.i'.t6v+2'n", ';.,. #. *+k%mrF v.+,`R" . oM` ''-• i•rv,. 4£ s x..' 4..v,s-,, `- tc..•:•...:;,;.ir„: .�,e.,, t h .; ' s• • • ; .�• .. ."t{r _ )y. ,�."y.��e 4 sr % )fhi,PYY ,- ',?.�+ vt{ ` ;srtc+ ' t'.. 4" , `. • ,c115'}'1+' '2.444., itt + Q" }t" -, -- 4t?Thsw . �� y� tc,,..: 4 v yt,t '+a.7,7,. p M+ to tom: b 11.11... '. '' ) iA • x r.iy•�?j'a air f4 {� b A ,"1 t• 1k "* } .LS fl ,(' !Yf , Y ! i `� t.•y,, aaiaG...T •-•- `LrY""h '�7 x �Ktk° f ;R' ' "t + ssp'� x f '.jv M•t Ya v ny -i. + y,;t+ f ai: t IIh i :w f Mi t, y`t y 1 (. z.-y :1 ti t '-1:141.-° _ Xx y� 'r„ .'•,.4.141:Vic;* `y„.�t>.t i Pr9 r,pa 4 1 �y '`�`,r�{. •''''''''rr711 7, ! -4r4.t, SY•e k`t, + Pak$ ' ,p ' [' F' r 'uj s A ��#yk;' :f rift F� .'f l±.tt'�' Rs 4 P \k',i".r,� 1.1.,-,,,,,,'_. +k d. t^-"z i 1` *-,g.p ..,:yF'u'H.* eriRg.,t� +ft'r o,t t : r}T�' d :1141,1� , : '4, '3`t'e'.,_tr .Ai.L%si g; it:,... p� �.4„r,1 F S c , } �" �xt. kM Fl hN" tir + TM1� +1 arr '�-nYJ1^ r�'b 4 h$ i r. ''v 3 ' �"Y'7k Av S0. �1 'i#'',t:. sy-�v.'y 0 ,{rt to �+ �A �' `,�,.",r+T'�i.'' ...,'hr y, F Stn.. r 5 2..e>k + .x Jka'�,. r,+'3 v✓• 9 4: ,: ` s,4. tidt4,a s'7,:t.: rov,' .,F,u'T`".a• '�A-c e,., " T -r r,�ik, mi d '"-.Nr,F ti..Yki.M it rt+,a , d '.rtJ� aY :?:*". ..4.1.'A',.:'4df' i✓e.- 4.,':��f, .1 N.*(' = ` t '+�,1 ML zV*hrff,.14;,.....'";=,.., . v !z Ld !` s t k, s55 { :Itt .rt'+ W":--t-?e= i .7'�� x- ` Fc t t L-x <a t.:4 C�,.. =ir r .3-ti 4y .yi:re'' '1f4 v t ', :$ 1 'd3 ,+t 'rx • z y; ^' 4 .::tt= i _� rf r 4?,?2 t 'i a-;"^'.•, Y n - l $'^.p Y Y - T 1' t,„.•.:‘,".,,,,,..,,,,,,,,,,..,.,.--,.;,%.,;,•- /i 4a. y' �+' :e-4a s r r...-.:,-,e---•';‘,;:,,: -.-4‘,4#4•••••,,;‹,.. .,•-•ta .a b'"r x w v ....tin,'ijkh-': '.' dy,5 x 44;Sp"Er?S� y.- ''<t 41.,,:t1:47,3 1., ^ Ya rr,. t af4:2.,-;ry Mt n a Y, y "a,+! F `tY t"`* , =.4; rrz r 1 , f,t'*' i*'"tF ,,,� s ,._"ke >e • i.+�x 1 ,.,,, ti T7`Y- ,` .{t°1r� "_.-r -+ st 4 y-“ •N' . s • .•'S 41 ,2v .,b4•„•44,...-,-.„: jf 1St %-t • , t- 4;tt N't 8 S1$ r'2'tt uFgxt tiFry" 4 ' _t t't A < ei' t w tv. xi,, k{,,, °'fN{{,,�� °4 i .7 'f , •.,-,1,4,4,..4.„4,,,.„.,,,:„.., „t' y ') r'4lt<i+'3'u, 2 t > r i, a ..' n.Feti � p 1'r, < `'2° f it..„„.....„.„, .,.,,,„,e,„•1.c ' #', y :, 5.+. i,: w, T t T 1 srQ r+e Av. .s1 .- t 'C 1 !rvh`7N, 9 —24 1..,,,v. &� :.941 Juty 1992`4•••"0:.,-...',,.14).,,,,r-- T ₹ - §a _ �� t 913-2403'' s tt.��F4≥ "Ii y {.� "} ;;yy�t�fj*,t4' 517.4,1.,t,-• M • e!. f',1 b ) + fit k h n" C 3'4 t 4~ .^s x gtz, 'I, .-. "h',,y .fi . ?Lk5 ., 1 or rvv .'-'1 h .r,"4J *rv' `, d+. � 1 " , '. . 2• C • e '7,`P ,-�9 w .4 R 'y'�°1 iE� : 3,t6;..2 _t3� .d& R -,, , .. y�x^i P� _ � . x'� � s' t z i ,N { ti�'"_t}7r� l�'�l�i* �3 _"7fi ¢6 vv.4 •'P�ti4 t�'re: T f '"�rtF t �F .. *: :i 4b =0,4 +1Ys itre! + .mt 1 . • {.4. „:t 4.y r✓ , r. 2+ .r+ n' �. 'y y TP 4"- ,!f 4—eit t•!7''0 "�'• . � �'�$ps.�3 t .,n. , „'C-4i,,.-:- s�,e�+t yil. a+t XY w-tr *�hT''�d'e'�Y^+'s r n.a1F• Y�"+'aid '♦rr74 35$s.,�° '��. x a[ "2'p..+ $-rr n«.r Fn'- ¢.LT GOIder Associat@4 �. isittw .0vi-t k 'N' 9ka t za , 'a*;.•4 My s'k �a >z,�",`+fs srG'�x,�x �'�.�`* -• 2k€� r :. .4,`i a:•. "?P`$alit tnt2'. �''yy�� ,;=, '-A., 1• SAMPLE INTEGRITY DATA SHEET Plant!Site (etittc. CI &e'-r' [.'wc«� Project No. 9/3-2`10-3 Site Location St..) 6tdo/J eD Sample ID 66../41C3 Sampling Location &&)Y'14) / Technical Procedure Reference(s) Type of Sampler SS ed,Yer Date 3727,47 Time '2`1S Media /.✓ATt't Station Sample Type: gra'. time composite space composite Sample Acquisition Measurements (depth, volume of static well water and purged water, etc.) our.,.( c„a J-v q LS" as( V ✓ Sample Description pal° loro4,., It, el Field Measurements on Sample (pH, conductivity, etc.) 42--x, S4. 3° Ft ro-,/ 3- 7xrovv v-.(,;sVr... PEI 7.35' Aliquot Amount Container Preservation/Amount Alin.5 o2 PI... CA•r0o5 I(7 q7 rob ,a a L ).0.6 HoUS Ortnii.o.€c 3-yahL VMA HCL .A141ak4A4..-.a;,) ,4s A) )6oa a(rsc 2-ML Si)% HIUSoy MP1a(s Rssocc ) if 07 Ful. I0,.L tot i0��SC/ J `es+tcrdi5 2 - I h J4•cs no pKs 42110[:414 I I;It. Sass No Prot R&lior,or G1.t S 2. 32 oz P°l7 - 10,. L 207„ii )Soy Sampler (signature) �uZ Date 3/27A4'2 Supervisor (signature) N Date • =) Golder Associates Inc. 931064 SAMPLE INTEGRITY DATA SHEET Plant/Site /.a'-men_ (j Gn wrc Project No. 9i3 2Yo Site Location S j re," CC Sample ID Ce-u440-/ Sampling Location L,,,k-LL /,e-re - / Technical Procedure Reference(s) Type of Sampler Terwti £Atc jz_ Date `f674Z Time / S/S Media L.A-rat_ Station n>a Sample Type: ,rab time composite space composite Sample Acquisition Measurements (depth, volume of static well water and pureed water, etc.) Tom DePTH = 30.3 / uol w- 1 2 3 ca 1, OF r.. 2.. kJ Sys Sample Description tier , 1, 11- L-A.,,„ L) J Field Measurements on Sample (pH, conductivity, etc.) ail = 7.Yt( Qd = 2. 57 x (coo /6,„_ Aliquot Amount Container ( PreservationiAmount - 1.4.4r 2- Lss beH(c AJM Sampler (signature) (÷;(--.4 Date Y/?Vsa Supervisor (signature) N/g Date Golder Associates Inc. 931061 SAMPLE INTEGRITY DATA SHEET Plant!Site CFon At Wee Ca.wry LAw0Ficc Project No. 1'3.2403 Site Location Sw oP 6' 1e, CO Sample ID Sr--,44W'2 Sampling Location &JAIw2_ Technical Procedure Reference(s) Type of Sampler SS �•jtr Date 5727A7 Time 530 Media L ah L Station Sample Type: rab time composite space composite Sample Acquisition Measurements (depth, volume of static well water and purged water, etc.) p,ru,( cMi- ''4,) Sample Description gale. 17,_- (" -'d Field Measurements on Sample (pH, conductivity, etc.) 5S.6 °r Cab 3. vs x(wo rM 7 Aliquot Amount Container Preservation/Amount 32 az yzl5 -to r S ceetie .s L& fl Poi) to ML 20% f LOcyf �tD'26a..,cs 3- cop,L IJoA NCL p� I,�� N• v. rem- '•� JS r� 16Oz ell? C3 2- m 5b% 4 `"7 1�e41c a'<s.l. j I� oz ; IDNL 2v%� N4 D1 Pe S1: idr5 '7- I I.kr cJ11+ss 0.0 ions a•Y3ic�a.'s ( 1,--kti/ACc rtr�y�•�'1 RAaLotO,«,0t3 2 -320? „at_ (O,r)_ 20% HAY)y Sampler (signature) (75,-- '3' Date V.7740Supervisor (signature) // /✓/ - Date -Jr.! Golder Associates Inc. 513106 SAMPLE INTEGRITY DATA SHEET Plant/Site ,C vs?et- War) At4DRti Project No. Q13-7q03 Site Location S4JoP &gai y , CO Sample ID (�C,JMw-2 Sampling Location 6rv..ds.a±er /t4e.rle.:y (J.ttl &.J/1�fco- Z Technical Procedure Reference(s) Type of Sampler rFcm.J (3AtccC Date _ 4 /77/47 Time 1600 Media C✓ATs'Z Station Sample Type: ra time composite space composite Sample Acquisition Measurements (depth, volume of static well water and purged water, etc.) 4)4 ( daft= 72. 2 ' rase i,nlu,. 1.0I <4 I ^t'ra 4 t, 3.O � I d F,J f Sample Description .;lt 1<4-L Lo-3 I J Field Measurements on Sample (pH, conductivity, etc.) pi{= 7.70 = 2.27 Se Ica) Uwl.0S//';3A 4-4.1°r- Aliquot Amount Container / PreservationiAmount H IrJer 2-yass (ooH&c Sampler (signature) (� .4-/tC. Date 2_74/12 Supervisor (signature) 41/41 Date Golder Associates Inc. 931064 SAMPLE INTEGRITY DATA SHEET Plant/Site at GJesp C'.,,,rrr [.t,.ar,t` Project No. ` t-3-21°3 Site Location ...5 to S 6r.6ra 5 Co Sample ID A40M-)3 Sampling Location 6c.)m.-J3 Technical Procedure Reference(s) Type of Sampler SS 41;1rr Date !?/25,A? Time Cyr Media (,✓a,ZYZ Station Sample Type: grab time composite space composite Sample Acquisition Measurements (depth, volume of static well water and purged water, etc.) puerl c,a4v iii 2. V yy I Sample Description // br•a..i. /.1...'1 Field Measurements on Sample (pH, conductivity, etc.) 50.Y"F co..). c.35 X,oeo 1-,....(..>At,,.. . off 7.5 Aliquot Amount Container Preservation/Amount /4,,,,,S 2202 pot Ha Pe-.a Ctno.Js IgoZpb IO ,.r 0ZNg1GJ'Y • Oeb.w.c4 3-LianasL VOA HCI &Tarr A As.n,,,.A a 5 A) 1607 5 fo u 2 .M L gno giva f /14,-nks. 6C50t-vie') ~ L az Ermsa f 16 oz pc,(... 10 r Pest,.,ors/Hta s,c,zyc 2- I -1;,4r51a rs (CAAotivc i-a,s 2- 32 n p,1� 10,n l 7070 HAri Sampler (signature) ��`� 4 Date ?/2s-42 Supervisor (signature) 409 Date =$ Golder Associates Inc. 931064 SAMPLE INTEGRITY DATA SHEET Plant/Site ('cvnz.w A,!~yn Ca -r. &4- or,r, Project No. 91-?-2-(07 Site Location $ZJ pc' &.4.5 co Sample ID Cc--'14."--) ySampling Location GGUz AFt J Technical Procedure Reference(s) Type of Sampler CS &/+rLe9 Date 5/26AZ Time otcs Media (_R'2 Station Sample Type: grab time composite space composite Sample Acquisition Measurements (depth, volume of static well water and purged water, etc.) purr.i 'a cr .-1 G,O ,� I J'J J Sample Description L51,4- lorrw.. S.!1. 6s J 6 Field Measurements on Sample (pli, conductivity, etc.) sl-8 ° • Cc+r3_ R ST k /coo 141 7. 18 Aliquot Amount Container Preservation/Amount AN“Wt 3Zoz Feb it-es G9„t>05 I (oz �1 t 10 SAL ZO% HvU 1 {/si.<s 3-‘10/..L doA 14 0- • -refrit If f�...a.a.* As A) I6 07-3 LICS z.31?cc 2n., 4<1.3% Hn:sai McTm.$ I/ssa+to oz Fob IOML 20'47 W.604 efr-znc,oes /Hect4S,nwe. 2 - J 1 1.4u-gfass na �S erlaOnnlr tr -t 2- 370-7 �,r - 10,4- 20%w (W jJy • Sampler (signature) � � Date ;A4 Z1 Supervisor (signature) /�42 Date Golder Associates Inc. 931,064 SAMPLE INTEGRITY DATA SHEET Plant/Site Ce:revar. GJen.o C -re L.a.22r.., Project No. 9 '3.2II° Site Location QGJ or fcc,L co CJ�n4)r J , Sample ID Sampling Location GC.JM WS Technical Procedure Reference(s) Type of Sampler <5 /a (.ems Date _313,/4-> Time '2/S Media Station Sample Type: eitJ•' time composite space composite Sample Acquisition Measurements (depth, volume of static well water and purged water, etc.) cirri ccv-Itr €5 y,0t4 Sample Description un, pale 'vary 5C I'S j.p ,,,r J l Field Measurements on Sample (pH, conductivity, etc.) 4c..„? so.o 'F • ?-OS ?ctom c..l.,xi/G•,. (41 70? Aliquot Amount Container Preservation/Amount A"'4,5 "V 02 f'/ no et,s /'esxa,x it, 02- (elkilo_pKs — nem,,)u s "3-9 ,I-1 mA NBC kaanre ItAikaa..4 .h A) 1607y,30 2 L 9z NN.5A, N/ feTh. b.s J 1r607 ?of., c- OM5 Penr,0c 2- I 1.4cr 5X4 H apes ��JJ II ✓ KaB«,Ofs f Ott a/a rc no/n.5 PAAO-.W..• r: 2 3207 (0 j /0.E.G 2970 N.- % Sampler (signature) 6-3L '3; Date 3/7i%z Supervisor (signature) /),# Date -=' Golder Associates Inc. 931.061 SAMPLE INTEGRITY DATA SHEET Plant/Site Ci x rc GJaa Co-TY L.4-fire- Project No. efr3•2`f03. Site Location CO or ecMc lv , Co Sample ID Gc.-149cj A Sampling Location TWA Technical Procedure Reference(s) Type of Sampler SS SA.c. 2 Date /3o/z Time /goo Media iM Station Sample Type: grab time composite space composite Sample Acquisition Measurements 1 (depth, volume of static well water and purged water, etc.) dUCha / G-ak al.. CO aJ 1 / '_J Sample Description V9f- r b J Field Measurements on Sample (pH, conductivity, etc.) 51.2 °/ coal. 5.42 ? &co pH 71,0 Aliquot Amount Container Preservation/Amount ?2 IA0fire s I^.kno ks 14 Qz cal] no r5 _ °Q64.„Ks 3- LeoWCUoA FILL v11 k...L....6MA As /U IC o2 c 6 sz 2 c -06 'MEd,7� .2/ir7t s, 44504..4e-, 16 02 fat nee- s L-nc.co; 2 - I W.,- cl. er Nofi.rc J /TEr1d,c.JcS I 1/4., 5I�SS �'tO s- AbC X1cL.°a$ 2 32 az rot - los-c 2o% ,vt6:y Sampler (signature) Date ______77/?',Z7- Supervisor (signature) ///i' Date Golder Associates Inc. 931061 SAMPLE INTEGRITY DATA SHEET Plant/Site t--rnwt &'t=h (is, Gh,.serc Project No. 9/3 2'7147 Site Location cr Fnul CO Sample ID 4.63MW-f11"64P Sampling Location cUMWSA Technical Procedure Reference(s) Type of Sampler 55 8A,(1,Q Date lho/SZ Time /Coo Media (.,t r L Station Sample Type: .rab time composite space composite Sample Acquisition Measurements (depth, volume of static well water and purged water, etc.) tP"t c, 9'(‘ ISDc.J J • Sample Description train p4)v mac, j:c .rJ Field Measurements on Sample (pH, conductivity, etc.) lewr St 7 lc rw 5712 K rn,O pH 7.20 Aliquot Amount Container PreservationiAmount AwrO -32 v. t+e(1 o PAS • Cer7O•JS (b rn NO p rdS rMacs 3- 40,, 4 0)4 ne./6.4_ tr Asacp4A -. 1U I6 of r.L.c e 2 .% L-t% Kks1/ J o. 5, arsixit0 /6 oz rad MO r J , E6M r(1,5 2- I I: SI�S otoiNS NcnR.trr4'4 i I.Xrc(155 et.pra$ l�rti3lo�u„yam ? 32oz. pa( ia..i 201< Age/ Sampler (signature) i Zet Date q, 2 Supervisor (signature) /7# Date Golder Associates Inc. SAMPLE INTEGRITY DATA SHEET Plant/Site �r-n47 0t (in-a 6._u' Project No. 9/3-2''o3 Site Location Derr 42e-n4:s. CD Sample ID 6W+'tw Sampling Location 46044Ai e Technical Procedure Reference(s) Type of Sampler SS Q4rt£,P Date I Zf/GJ Time /620 Media Station Sample Type: •rab time composite space composite Sample Acquisition Measurements (depth, volume of static well water and purged water, etc.) Ft1,c1. c-ra-ley %-(_ -C el U rs�„_ vo(u--, Lt.27 e-i v ✓ Sample Description 1,.+,r � Field Measurements on Sample (pH, conductivity, etc.) 4 , c1.3 'F ro A 6766 acme PH z 2- Aliquot Amount Container Preservation/Amount S 32 a2- e0l 4°?its r44-notS I G, ; eri 10 n.l 2070 N y l 3- u;,0.` )oil Ha dirrgtS 4,a estior a< yt) l6oz alrs5. 2 So% gases,/ ✓� �4 Qssoc�:)v oz_ po 10frtiL 70% 1-6US-N -- Cf. JK�xeic tar s 2- I 60 .,/.1s 1S s uo An S .FQc`�nleo,oc-s 2 - 3 2. oz. Po3 )0. c 7cZ, Key Sampler (signature) ` f ?/Z-S 4 Date 742 - Supervisor (signature) 4//7 - Date =' Golder Associates Inc. 9 3J.VQ SAMPLE INTEGRITY DATA SHEET Plant/Site / Aa1RM. ( !L6 Gk. 14 {�pru` Project No. 913'74°3 Site Location SGJ CFcceze; (O Sample ID 6-)A4W Sampling Location 62oc..z...tn✓t /XUnw.,* Technical Procedure Reference(s) Type of Sampler E�`rOevsn9c. 1e P Date 1bfe/CZ_ Time /320 Media GJATE2 Station Ad/2- Sample Type: 0 time composite P space composite Sample Acquisition Measurements (depth, volume of static well water and purged water, etc.) 4044I i-124..= 30.o 1.4c f J pf� a t_ = 22 as Sample Description 4Ill, aa.,.. j Field Measurements on Sample (pH, conductivity, etc.) pH = Tea fo,( : 4 2 x Itxro u I es� It-f: 6sA oP Aliquot Amount Container Preservation/Amount 1- Lk,— I-ilAcs 401f/t. aO"-t_ Sampler (signature) C ed Date —1(.7_214e. Supervisor (signature) 4//# Date Golder Associates Inc. 91.06* SAMPLE INTEGRITY DATA SHEET Plant/Site `A:0-T0,4L. Ljsn4 `Cowry / I1Fcjc Project No. e1 i3 2YC"3 Site Location Si) or 42�r-ct-.4 CO Sample to 6C-14414,-)—7 Sampling Location 64.)Alta 7 Technical Procedure Reference(s) Type of Sampler SS RA4Gc17 Date 7126'Ira Time /SS° Media 6,,ATc4 Station Sample Type: grab time composite P space composite Sample Acquisition Measurements (depth, volume of static well water and puroed water, etc.) ra cr� vo(w.v 3. Sca / Porr..L 4 t.. 13.0 •a l J fr ,J Sample Description Pa(' orb-3;st• Lra..+.. I77,..1J Field Measurements on Sample (pH, conductivity, etc.) S3.6 °F • rehj 531 k .taro c._f,.os, .0;47.Y( Aliquot Amount Container Preservation/Amount 444"p`"' 32 oz oo rw pn s • (a--,w,s lb n p Ii,M G °O /(7o 2y Qas,w,c s 3• `10,..1A RCL tb naa*c a A.4.-imm as /U I t.oz c U s .2,,„L 9b N�JSQ/ 'JTefts �asn.-✓� lb j oz 00 r0 4-4 2o"!o Fly s-sctn 's Act-re,c,xs 2— l life`: 51r-c rw a-ec ICAnaiv.4, orb 2- '32 ea pk 1° M 70, /-60S3/ Sampler (signature) (`JtT—a Date 3/WI? Supervisor (signature) /i///9 Date Golder Associates Inc. 921.064 SAMPLE INTEGRITY DATA SHEET Pl ant ISite CFtirx.re- &.eo Co.--r. G4,,yercc— Project No. 113. >lc'' Site Location Si , J' C:W---€ce'v Co Sample ID GcJ4.co ' Sampling Location G.‘).uc,)}Z Technical Procedure Reference(s) Type of Sampler SS BAt(..eQ Date 3/27AZ_ Time I«XD Media C in tae. Station Sample Type: ra' time composite P space composite Sample Acquisition Measurements (depth, volume of static well water and purged water, etc.) 035.- ‘.oL., C.35-3 1 �.:f z 2c�_ O -1 / Sample Description oej elk car&, hi-,.(4 Field Measurements on Sample (pH, conductivity, etc.) s5: 6 °F • Co.,l1 6 Ssl X (Cep L.4-,1.,s/e", p H 721 Aliquot Amount Container PreservationiAmount AMo..,s 320z fe1 no pw3 (^r+�o- S l6 i f tam C. ZOS 6609),/ OIPbt•ars 3-110 its L vaA H<L 4 N-O.+k 4s A) &Oiw 16 oz5tars 2 r sit K.usif ! rates as s,,..0-1 u, 02pt., toMG ot0NAy 9-471C,a-S 2- I I:►k3&.ts �P,�s Redoc".v5 1 ',lei last 4!l ��r<s 000Mlcc oi5 2- azpj 10 4.1_ mix, F/µ1A/ Sampler (signature)-(a Date _____ -_,27.47 Supervisor (signature) /V/I Date ( 4 Golder Associates Inc. • 931.06.1 SAMPLE INTEGRITY DATA SHEET Plant/Site /'r-,r2rm (jet (o..trr Lvh iirt, Project No. 9,3-2'613 Site Location 523 or Sere;'! Co Sample ID (4L.:kai1W'S7 Sampling Location /;2O.Y...2...irreet- tffi'J•.rs.2 cN(., &J 1t_ &Jptc j- g Technical Procedure Reference(s) Type of Sampler Tec.r,v Qi� ceL Date 4737157 Time NC' - Media Station 't/(/* • Sample Type: time composite space composite • Sample Acquisition Measurements (depth, volume of static well water and purged water, etc.) = OD' ra>'., VC(0,-e_ = 4,3344 o 2Q Ga ! v J ✓ Sample Description 'AWL 014.r Field Measurements on Sample (pH, conductivity, etc.) 3q (0..4.7.(O4z 511 X uxo L.-JA.05/c.--- ACT: 62.2. °R Aliquot Amount Container PreservationiAmount I- I.-ar 2-Macs Lilts No a Sampler (signature) (-4<e-1,-1, Date 9:67,42- Supervisor (signature) /I///9 Date Golder Associates Inc. 921.061 SAMPLE INTEGRITY DATA SHEET Plant/Site ec-*-.rile l.,Jet1 Ca—ry 1-4.--gek Project No. 1'3-2,O3 Site Location 6-2fZz6' C2-) Sample ID G )Mc.3I Sampling Location 6l,_i4 c... GI Technical Procedure Reference(s) Type of Sampler SS S+crr'L • Date 3/3e7' 2 Time OV5- Media (..rte Station Sample Type: •ra. time composite space composite Sample Acquisition Measurements (depth, volume of static well water and purged water, etc.) Case (m(.,..,c 2. 81 I p)raQ 1-` g• ST Jul J Sample Description r-c . br.... .L vr� s t 1,-.: :..r Field Measurements on Sample (pH, conductivity, etc.) 46.O pr . Cak.4, s'3 x loo tr--t„,/t,..... Aliquot Amount Container Preservation/Amount A.ww,....� 32427 ( y,o 9,4S Cincw s l(,oz no ire s Olet.AAAc.c 3-KoA. a4 .HCL Af a i Aft.r.a....k A} )4 oz i l,r S 24 -9:F4 Nil Alt f.. DssCL.,1_.,) 32 02. r.111"-s P ,c4Ot's 2- 1 ),-4.u.-:931.) •-•S 1- Etc.i e L I i.der 1 i?ss ;rW ist4.,$ RA-010K0,,..14-..4 '2-3202_poj i0"1.2,11, HA)S)N Sampler (signature)4 Date Supervisor (signature) 4///V Date . =�' Golder Associates Inc. 9234.fls4 . SAMPLE INTEGRITY DATA SHEET Plant/Site /7.-Tale (-.keo Project No. 4'3-2 ve3 Site Location g) 074. Meric, CO Sample ID 61--M L0O Sampling Location 6/flea (O Technical Procedure Reference(s) Type of Sampler SC £fietg2 Date #5/7�1/4-Z_ Time /or° Media Station Sample Type: rab time composite space composite Sample Acquisition .Measurements (depth, volume of static well water and purged water, etc.) VOLc 2. 'I 5,I 1 2 O c a J Sample Description VA y 1.J Field Measurements on Sample (pH, conductivity, etc.) 4e. _ c,_) (a.ssx tax. �N / Aliquot Amount Container Preservation/Amount Amtas q2 ottaOi _Aar 5 eAn iS (b oz g3 Io...L7oq,, N,ta !l/enured Ira .'_ N I( ozjbcc 24Ab°1, +cowl 4; is thsotuso (6 oz lams 2en..oHuf -s-pet4t /M4&ee.0e5 .2- I 1, h j75S nrp es terao anat,ot; 2- 3740.1 Io;.,L 2o'J., UAW" Sampler (signature) Date _34543- Supervisor (signature) / /f Date <' Golder Associates Inc. 93106.1 . SAMPLE INTEGRITY DATA SHEET Plant/Site 11FtirR,,t L.474 `p_qv h4+-vnec- Project No. f//...?•,2110 Site Location cc of Cree v� CO Sample ID telitJ f/ Sampling Location 6->G.trNw f I Technical Procedure Reference(s) Type of Sampler NY/aeosin.e &..,,p Date 3724,4 Tine /030 Media 4.' L Station Sample Type: .rab time composite space composite Sample Acquisition Measurements (depth, volume of static well water and purged water, etc.) ram coL.,,,c. 7 7 5' f P 'a' 7:3 lc. tea ; J Sample Description A-2=(., ._ 3,j 1,;,,.,e Field Measurements on Sample (pH, conductivity, etc.) •., s36 °F . ('i-.A 4.t4 k tow c.-44,4,-. • pH. 7_.c Alisuot Amount Container Preservation/Amount //motes - 2 02 tool—) its p•`3 C.s no—s (6 0'7 f0 pit 2o°C, WNSw Orztowics 'c- (-tont Vb4 N(1 kayak-n:7 / MLOWA J5 A) k.Cr-4 4ins� / Sin) {�c.snrxratt 'Set eY[Ba ai3 2- I71; ills, sae/Fes p u�y t/ / hoc. UoC..ides 2- 32°2 r, - 10,i, G✓W W�7 Sampler (signature)__14 Date ._37/24/— Supervisor (signature) A// 54 - Date ?' Golder Associates Inc. 931.061 ' SAMPLE INTEGRITY DATA SHEET Plant/Site Cta+RAL Lir-nil e'owTy 101%,,W1 es_ Project No. ¶'3'2Y03 Site Location 4C. C ≤arzz.ei tb Sample ID SCJA4c. 7 t2 Sampling Location Ge- MwQ.— Technical Procedure Reference(s) Type of Sampler SS e6Yee2 Date 'AA7 Time /2ao Media /- 2 Station Sample Type: isalip time composite space composite Sample Acquisition Measurements (depth, volume of static well water and purged water, etc.) Cas,```�� VO(. e &. vs,.y /Jvrr ate, IY,o4d/ � � Sample Description Az,);-.. 414, s'I± I.A.,,c! J' J Field Measurements on Sample (pH, conductivity, etc.) p SP.2°F • pf{ 7.1C Aliquot Amount Container Preservation/Amount AuAiO•+S 3202.tank MD(1ieS OfT10 6 oZ �u .no pes_ _ AO c1 A ,,``y 3-40v.a. otA Hot A)a nA ,as4 as A.) it) oz. glass 2,,,,t, 5'/a }tic f 5504./W3lt-p t.s, 6 ssov3 16 0-2,ini yte5 n t�3neta1 2- 1 1. c ?,S Vt.°pre; 19-atcttES 4, le..rpss Acpra5 P.seoto ca..oU - -12OZ- r5 Id,•."(, �061J.&1 Sampler (signature) (TI3 Date ___:,3/211.2- Supervisor (signature) g1/47 Date =' Golder Associates Inc. 921.06:1 , SAMPLE INTEGRITY DATA SHEET Plant/Site er—ry . j„ -s,ti tb v CA..airi,c Project No. x113.7``/03 Site Location SL,)eV G2enei Co Sample 10 64:-MIL)/3 Sampling Location (cGJMWt3 Technical Procedure Reference(s)Type of Sampler A( re.DAD tc. n Date 2/2S44Z Time V5 Media !✓vrrV& Station Sample Type: . ab time composite space composite Sample Acquisition Measurements (depth, volume of static well water and purged water, etc.) Cast-a 'id th.tiv 4. 435,, I fur ;13 28'.ocai Sample Description (x51- Yl0.-..:sLcr� 1,,.:.! u k Field Measurements on Sample (pH, conductivity, etc.) p 52.7 err co-4.. 4-45 x t000 ,./ ,.4,,41. r 1-1 1.43 Aliquot Amount Container Preservation/Amount Auto-4 32 p2rD o... r` 5 G+naJ s v.� Ir),..G 2G% 44.0 orxlfrKs 3-tr., IDA I-4 CL knRy,rg-{ .a.w a s N ti 6 oz5(„3 2-, sot gptcoy 1n��' h.s,assw.f IC, oar Iomi2dito may 1C7ti«T5/Uka aicto s 2- I I;a�jas3 L,Qrs." PArtio "d.3 2. 32 oz. p* lord.. to 0 - Sampler (signature)-4 Date _,,1_2_474:2- Supervisor (signature) -17 Date Golder Associates Inc. 931.06 SAMPLE INTEGRITY DATA SHEET Plant/Site Ca<--morta l &-i? A/+.a <_ Project No. Qr3 2.1°3 Site Location 4,J..arGRcrtciv Co Sample ID se .�c....)t`/ Sampling Location 66J✓7"I-..) tom/ Technical Procedure Reference(s) Type of Sampler SS /gArce-L_ Date 3/ZG74Z Time 4,20 Media Station • Sample Type: gra time composite space composite Sample Acquisition Measurements (depth, volume of static well water and purged water, etc.) C St voles. R.4 3 a I Pll'..Q a h. 2 z c ; I f : - J Sample Description (1%44- C,r.L. -S ,,:cl U Field Measurements on Sample (pH, conductivity, etc.) ≤c.G or w-s8 y taco u.l.3s/t,, 199 7-5C, Aliquot Amount Container� PreservationiAmount PlNraS 3G ?2 tcono re-5 1' 5 lG o2 Pp l o n,1 2cA„ UA3St .j ORtAntc s 2//- yo ft., VittA)rre/rt4 Num...rw .7s ./k) 1Li02 1355 2w4 - (45) Ik' l�ss� 1 Inc okWY �n<<mt-sAHe�is s lI, ix� :ors au 2-320z on lar (.2(14 Nd.153-I Sampler (signature) dc c Date 2_ 4z Supervisor (signature) 1%4Date • Golder Associates Inc. 921.0R1 SAMPLE INTEGRITY DATA SHEET Plant/Site &Ame+t_ 6-t24 44.6 Thr tt '-d reec Project No. ?/-7.2146-5 Site Location J cc- £terceY Co Sample ID 6≥UML)-t'•/ Sampling Location 6a z'.. L lay.na2..,.6 C.lb"tc &M AL) Technical Procedure Reference(s) Type of Sampler 14•68/ZoSTI4a._ jim....0 Date (f/2g/G? _ Time 14,^t° Media Prri -- Station AJA.I • Sample Type: time composite space composite Sample Acquisition Measurements (depth, volume of static well water and purged water, etc.) r..:1s,.. ucL = q.G 4q I FOraP J 5 3 34 Sample Description I.<G*gp.i) t SIJ 45 5.1- Field Measurements on Sample (pH, conductivity, etc.) pH = C-ye rot.! : 4.53 x ta0o 0---4ac/,;,_ 63.3 ° F. Aliquot Amount Container Preservation/Amount 1- I,Jas 2 - a l a ss 4o t Ha.* LI Sampler (signature) CX � Date €-//4,41/4Z_ Supervisor (signature) /1" Date -F."-€'41 Golder Associates Inc. ` 21.46"! SAMPLE INTEGRITY DATA SHEET Plant/Site CEs+-r*- eaLT`t Project No. 7t3-21O3 Site Location CEP cf' Oaeace.m- CO Sample ID Ud Sampling Location 1#40-jams. (Ave:amik,..Q Technical Procedure Reference(s) Type of Sampler Date 7ar2 Time 0120 Media LeeerL'L Station • Sample Type: .rao time composite P space compos;te Sample Acquisition Measurements (depth, volume of static well water and pureed water, etc.) Sample Description rlav- tyet Field Measurements on Sample (pH, conductivity, etc.) Aliquot Amount Container Preservation/Amount / o4,4, 32 oz ir �Pr. �./,4-no�5 lb ci IOn.L -20% Rk&)1 epaA„wrs 3-4O' WA HO kradecr ot ill I6oZ_4 test 2wL stcro41 / Ale-r'1L 5 TarPi_ )G oZ Inc, I ow ug'e�( /� 2 I I. ass uo de, Kaaouuc�>oa 2- 32 oz Fv (OA.,I. ?rt 1-1d8k Sampler (signature)_'1��; , Date —3 2c/� Supervisor (signature) Date Golder Associates Inc. 931.061 SAMPLE INTEGRITY DATA SHEET Plant/Site 77c-e/244-4- &VCLJ nn..T1 cL Project No. Qi3.Zy0� Site Location 44 ) a.= &euc'r, LO Sample ID lF- u>7 Sampling Location L.*.-nc.ic. 0A-Orde „4. f63 e oG Technical Procedure Reference(s) Type of Sampler 4-1/A Date Y12747 Time !63O Media Station • Sample Type: •r� time composite space composite Sample Acquisition Measurements (depth, volume of static well water and purged water, etc.) sk.) /A Sample Description /',t.. 4nn-+ o•,a-:c a4c.: Field Measurements on Sample (pH, conductivity, etc.) Aftl Aliquot Amount Container Preservation/Amount 1- kr- 2- rr (rs s Ln ri4,5 Sampler (signature) (1 /� 4441 Datev%z75-Z iY f�7" / Supervisor (signature) Date Golder Associates Inc. 921.061 SAMPLE INTEGRITY DATA SHEET Plant/Site a—.,est Wezd 6.—re A.ocrtC Project No. 9/3 291o3 Site Location </ ) cF CeEcey_ Co Sample ID /U- OsOh4 Sc Sampling Location&tfsuuaLe "we ,4r Ajsern ,44„,..„,,,42,, „F rr7 Technical Procedure Reference(s) Type of Sampler Date -3MAZ- Time 12e C Media Lain- Station Sample Type: rab time composite P space composite Sample Acquisition Measurements (depth, volume of static well water and purged water, etc.) Sample Description Gie.../-: (e5.,/ Field Measurements on Sample (pH, conductivity, etc.) Aliquot Amount Container Preservation/Amount S 16oz ,t 1O...I 2001, Ri bl (�2�.ates 3- Ko UQA HcL j(1,,, vnr ft dsuea“04Js A) (602. 9L.s 21,tni4A601 rate L le oZ lac\ LhrL 2dt,f gsre(ay ?- I I, tl) rwpr-c Tlev.3aat7r� It -itrglass wOdrec £►ocowvc c ors 2- 32 oz f° - l0„c 7(n, HJh)y Sampler (signature)__—��✓ Date '__"y.""*" Z Supervisor (signature) /y./., - Date -=' Golder Associates Inc. 9:1.061 SAMPLE INTEGRITY DATA SHEET Plant!Site /'e-.+rReh Clez' &z...'r$' iyheenrc. Project No. 7'3-2Y0c Site Location 447o'etera-cn - Co Sample ID RP- tursr Sampling Location tars'-n.s.J Q'-o .X i&s r Technical Procedure Reference(s) Type of Sampler 4. lie Date 3/26742 j 3A7/s $'i z Time ' S /330 Media LTA-22 Station • Sample Type: .rab time composite space composite Sample Acquisition Measurements (depth, volume of static well water and purged water, etc.) Sample Description C4.v- (`41r la—t. v,,-,Z ....,I.Ana / Field Measurements on Sample (p1* conductivity, etc.) Aliquot Amount Container Preservation/Amount Loki 32cn pJ vto pie S Crnzaus Wooz k°,t. 2cPa+t s ��2A4445 3. WO„aliM Net Yl),iotte f ., 4s AJ 16ozj cs 2—L Tit NtL&Y 4tET.rt5_ Tent 16 oZ TM )Oat 2014 +may ,e3,174 WC2- I Ii'kr-klacs Ito p-es iladaitt3 1 1.4cr 5155 �rr'YS /44rouocuot3 2- 32 p7�IDr,►.., / IOON42veell"I{WJ`'/ Sampler (signature) I /VTDate 26/ 2 T/�!/ 2 Supervisor (signature) /741 Date t.''-7I! Golder Associates Inc. 931.061 SAMPLE INTEGRITY DATA SHEET Plant/Site _/1-7..rn,+z_ (.Jwza LQ,_ry 44,114"cc- Project No. 7'3-2s, 3 Site Location <Jar &2F•st4'w Ca Sample ID RQ miter Sampling Location !<M7Vktf-+••T its /Vtar Plat 7O 2er",,,now .f11"1-1.4•_ cF forDikr in cr— Technical Procedure Reference(s) Type of Sampler Al(A Date y/ri,4z Time i'‘`!0 • Media 4krtt. Station Sample Type: .rab — time composite space composite Sample Acquisition Measurements (depth, volume of static well water and purged water, etc.) wIA- Sample Description c4&. Sc*-e_ rti a....:. .s•-e:k. ( Field Measurements on Sample (pH, conductivity, etc.) Adel Aliquot Amount Container Preservation/Amount 1- f 4. - 2- c lass lolets ,ic Sampler (signature) gt...4 Date 4/7".7/4.t2 Supervisor (signature) /V/`I Date _' Golder Associates Inc. 93iA6"! SAMPLE INTEGRITY DATA SHEET Plant/Site �'�uora'tt. C✓Lsb n � Project No. 973.2/03 Site Location S'J c.- ea-c r CO Sample ID 7—Q Sampling Location 72,P GcAwvC Technical Procedure Reference(s) Type of Sampler Date tP3 szsea.,ED Time Media /.rA- 2 Station Sample Type: grab time composite space composite Sample Acquisition Measurements (depth, volume of static well water and purged water, etc.) Sample Description tAgftReOffQ .-c IQ,P (✓i,.a t Field Measurements on Sample (pH, conductivity, etc.) Aliquot Amount Container PreservationiAmount n2F,n.,.. < 1- (40 +.or4 Sampler (signature)_'�('1 �� Date _____=1,c1-' Supervisor (signature) N/ Date Golder Associates Inc. 9..) £4 SAMPLE INTEGRITY DATA SHEET Plant/Site t rerPC 4k1-A 1.,,,-v L -hneec. Project No. 9/325ty! Site Location S/ , J' 4'e:ca; Go Sample ID All Sampling Location eye re_.:( 8/4.. k Technical Procedure Reference(s) Type of Sampler SS AA'ece�! Date x/27,42 Tine /no Media AfrTht2 Station • Sample Type: ab time composite space composite Sample Acquisition Measurements (depth, volume of static well water and pureed water, etc.) Sample Description /14 c7,o/•.d 4iw•uf c.a&.r Field Measurements on Sample (p)i, conductivity, etc.) Aliquot Amount Container Preservation/Amount f i vio iG 32 oz (poles na .S (' 700.5 K. oz pa., (OA.L 207 34;. ../{ ,24,A .c 5 3- 40 nAguotA Ma.. j 4� h1nz.ri',' Y /Loa*-is Ai 1roo2c l›-„c 2 -ILCM Wia AU-Mt s. INL. I4ofpots bet.L20n4AL9f asstc.de.5 2- I I;}v Sass twpr•-c Metdcciq I:5 l.'4 clasc Inap.-.5 glikkomocan co 2.32 O2 ppLe Ioo,.L 2 h 0-1 Sampler (signature)42.12,—.4pia y47/12. Supervisor (signature) /Y4if Date Golder Associates Inc. ; .f' SAMPLE INTEGRITY DATA SHEET Plant/Site (cwcY acc Project No. 9%2t' Site Location Jcr i2asz.e" l0 Sample ID /Z13 Sampling Location X:,v..c.-r e<.m K Technical Procedure Reference(s) Type of Sampler Nip. Date L/, c/ca Time ,S Media Station Sample Type: C grao ' time composite space composite Sample Acquisition Measurements (depth, volume of static well water and purged water, etc.) AJ(f Sample Description /744- • Field Measurements on Sample (pH, conductivity, etc.) Aliquot AmountContainer Preservation/Amount I- li�r /- c(.cs 'Ni'C 44dnr J Sampler (signature) /L ---1-( Date `//1ffAZ Supervisor (signature) AO; Date l Golder Associates Inc. •`r nit-7-V."-'"t'x #w . ^Y Lcem.tr'z MMLN.-...494 ;',4'�:-; j p�k- K`x+ ' �',,, .,,, f b(ae nirtr r"S`,,y�': '� i r t r L n"uF;` 8i: 4 pp; t a'jc r. ; Pita. .YF' "( 4.S x�"trer e;\`NF . 'L„�. .Ar fv64 a- qt'f o. • c ,,�f 'M' r J- x s r< t"; ?,c': + ,t ;;, .L ed 0:+•`w'+"G",'≥'',16]` i..;r. ;' `�: Yr, '' rr.. i �t, C.e°:�A ,.:SAC +wd�Fl(!`R�r ?'0t d-.�rY'$. a.. �' yyam�x,�- • ♦. �l' 0 K ''yy��+ ,,°A;4 'rce,e'er•^: y„t �nJ Y.ir m� e . _ ,. YM"r. A . S.r i4411'Q A rt' 14 .ra Fyn.} 1+ 'ri •Frb4yl > ✓ i _. K V. z t, ,,e4, aJ , r v.'. 'n 9 's, s r s it r h ` f- r 4t. `^' Y ,„„i.•..,} ,P,4 z.- - n `2. ° T1 -,'aY i4 .. . ., .w; ir'wM % .{#°.'p.• J :, • ..rs- `s^,rryx^'4"r s-r`h ki ^`,myM^L �v', g{va f:� reai e+ iN,'ray4a9'5WJ�St�'+{eyr� t ;g:ra ' .C.,;L. fi„:47, .1, '—Fti• 3Ff '1.;-;;.,•-4`',' `+C"' .7zvi`M�zi L+F •r..n h - ^+.�1 - _: ''a o, .i �'5 a '`?• r C-;kv 4` y_ni. <}. ',. i �x .' r s. r• ;k+ _ £ ,y Lie _ vi r .'-‘,;''4.-,A.'?:','",;''a}`k '1,):,,Q,11.1:;4:-.4.4;,k�, °4 �;° '_i t+5 9 R44?B tk `u`rye ,,,, 7' 5r pt't7� it Y fr K e i v'p z N, � + F, • }x% wIta ,3iss nr - 4` • 7 a t .. '3"Ny s' 't*R yx a•: Fk , , ° • { i za 1,wy. r`G d ,E,=fy. ,1 C >_ tii'tr., 'rr•r" '471.,'_•' 4"" b S nZ C •r Y fz.4 �x {" 6n( [Y z++„ ,lx X°u •S� c i. a₹+•� .t?ka nt�-,, s0 r . 4 .,. <�.. r`.,�,4 r} "ny�,",7a. ,.n .,,_, • FEND u ,__ GRAIN SIZE DISTRIBUTION CURVES AND COMPACTION TEST RESULTS y� nn W h W t ti's l r •ryr.. : tr cw .r4rt ' T c.,.b-;11 -4 z4,, ,,,. Fw Rw,i..-4 44r,o'+. ': 4.-w-7,-Cr-7,Yr ..r a, -r,.• w'ICG.a x ,,y, ^Y'rt+... T d { xt?:? 6`#rSt G'H't�: .�e L r •"� Y �r4:sr"',4:�r�. —.�Y:"FR-• �'�Y�.*°:tv,"� Ysa,6h'9v �{«_*'�_y r+h r � � } • .1Y +Y'+"y'FMb — ,lr:",t-t1Y�`.2`.�.tie �"�'ti'�s^#sid4�",� �•�� 4 4 n : x Rr t4 a yk r t - '"l a t } 4`£ ,y. 1 . ' `Yi `^ W. i IV' '_ ' 5 4 F rNt of 20 � . . t"� �f �' 2 > n i r� E Et' err .x L ISai . ♦✓ i,, Tr'c ,: �Y Sh 5: }e - + 1 x M1r'EY '.S fy, �} Y � "k 5p C^. >q 5 4), + 5` , .t.C"3 i r i`0 EC D. .y . c- r j r tK. r $:r�. Y +,.: t. hY X a y a} ". 41 r t. 5 t17 aeC r e'i� x r fi' n S 1 n t a .V a'J` a r 'r *'9,y T '3,r;X. 1. -p a 5 c.' --....6;:!,, ,S..,: ,'.'[ Y `4 x� r y,^ a P w ._, o Y' ;-': \ I'4 r n t3Ytis E i, a ri } +'fit„ :1 e•R `� Ye_5` 5 tea. !4 :7.7-2.,7 L,. ^", raL'.;,72,:.!,,,....7. .�.y 4},� , i t m aA'r� � ` °' '� {5 f$ htJ�lt^pi" a ., ';,,:"r'� "4 U .0 h irs.d r'_ yr,.r 19,Y r.-il jr,;�.,r. '4,,Y,'.4, ` ai , ' ,,,, ‘,,,,,,,,,,a,..%,'sA�ry ',A "• 141414 r + + Ft c { `q f ;xa , , 5 "r 'w r -,w ri .,c£k ' 'O,h,t,,,E; d it4 r•�,r`w`Y W t '1 J yp >d x x4' k w+1� .�+ -2 a '�"e ra4 ay*o yrwxf `s` r � tx �'M� '+k, - ..,E a +,1.1.F,74„:2 tYr - 4....;.;!.H42-4S4-1. • . 4 t4' tiP' 1 .-{.-,,,-4/' an ,:-.,* t "+ a... y .' : 4^ �• =,.,xUt zk`ic #rZxv'C.,4ti �gs+a}w '.n .&1 xt.. - . t4 rf t } '^E5`.,,-'4_,:l?.', 'It f+' .. 'dries ? � e�t'y, x a• 7M Job { y ygrr ,R .k`-` +tg4/54). 4, ��•v-2 a `'i''` Yr, ,n t,sGoider A_ss c... . ?' s .+. n"�5 ,w 'Y 0, m w O as " r i O C7cl U CS. M O i N w z UJ 0 J V. c) al Q 2 (Mla t- w LL O z o Z O J r0. 2O w y a> a3U 3 oewi a o Lu m a w Y U = cc U W > CO � OJU a 0 z O x O Z en w m 73 - . W - Ili 2 c I— e J O Q I—' C i 5 — s U Cn- x z 202 2 2 Cl)O N IIIN w z E VJ - W z ' 0cn s 0 U) a Q N N < a = rl -c CC — ai W Q y � U O CC o _= •3 0 (� ( 0 0 at CO N lIJ z a O a _ co Q w a h J < J O U N 1, c.) 44 iV m 4 N O O m r co • a• W • W 0 - oCI O O O 0 0 O O O O O O = `v O 0) CO N CO tf) d' M N n awaCUwzi-- w — zw ¢ m ) 3W — CDI- H � 0 z a c g 4 1.06 o, Ca r., a O Na = O S (j 0 �I U tr. if _., e N iii 47 Z J O w U '� O M CO W Q . O m N o J - O �. eh OJ W a) < 3 v 3 ii:id 03 7 2 n 3 o O U W2m a 0 Q O O e 0 Z D N o y W CO a ' m W2 c I-- W e J O Q _' O (n cc z o M `° 0 2 7 O W o U (I) z E O cN Zen N 1 � z a y Q CA j 0 LC Cr) W QLU U CI 0 CC < J 0 v a Q 0 N 2 6.- ' m W J 0. i iO 1MJ .J 8 M w N i O 0 3 O ul . O J ... Q U 0 = 0, e M • aO 0 0 0 0 0 0 0 0 0 0 O O CO N cO to I N1— IL aWCCUWZ U. — Z W2 CO ).* H � a z a m m W W CI i o Pg a M " O s C'3 0 II f el 0 H __ W I O J C.)cv m O Cr. 11.1 111 o) w0 z V. U a Qf O 03 a O riCCMJ W O al 0) < 3 � 3 ed es Ueiiti W F- 00 W W z a O0 „ 2 m O -, g z 0 0 8 O � Z f— w z 3 N U U) m g z Q CC il . F— FnZ — w U U) CC z z 2 o a C] < N < ° 'Si U) W z R _ Oin OCl) N (1)- r Z C. u Q a a CC CC 13 CC 0 2 Z � ' u, 0 J in Q c.) J CC 0 0 O ( 0 40 U, z O et W J Y a a O1^ aiu y J N < J 8 i in 0 a N c •- O - o m W T. d a O C3 8a U i 0 2 O O O O O O O O O O O O (3) Op N (0 U) t r') N <-- Q r— cal d W CC U w Z !— U. — Z to CC m > 3 U1 — CD = l— V' ; x 2 U co 2 ._ to 3 ¢ m R' .O6 0! W o W M C.3 O S - C7 v cl. d 0 O ti ui z z w O u. 0 of fl N Of W se N 0 .— o g NJ o O - ra a O w ala 3 U I- d3 ni z bb m < ' 0 Y 2 U o z a 0 U CIJ cr -7 ‘- Z a U O � $ Cl) Z c z W W LL b CO vs ; L Cl W — W ` I-- cc ? ; ° Q !— n E O r.s_• o z ° x 0 Q N H W Z Ci) W Z a to Q V (/) ^J , z a - Q - o x = CC 0N # W Z a < u, 0 CC 80 J a 0 a a. .7) a a a: N Z 0 w J j 0. i Or, M 1 7 J O O J.i 0 , Z. U 2 n 0 0 m w a r m o CO O a N U f` N O z O O O 0 0 0 0 0 0 0 0 2 O 01 00 h (D to d' r') N r K r y aW ¢ UWzr- U. - zWx m )- 3W - C7x1- a aQ C , $ (171 R31.06.4.1 N ra tu cg N = O : (s a / Q Ma r N I [y_ W z W 0u. 0 a C w• O r w d Cb «< O 7 N 'IO �a 2 O w 1- O a' rna3U 3 LU m< w O Z 2C:331. 0 0 m d O-J U Lu ct O O R ' r O s ° y Z — W w w D Nci 03 rsi z W 2 a vi . Q _ ,cn i- � = 74 3 - O to o z O 2 g O O- a ,t„ 2 za � U0 W z ' O � 3 OmU N � cc CC e t7 _, `° ao W Q N n< c O 8 0m 0 CC U C3 F 0 a _ r Y EC O 7i .. r J .1 r j 4. g ta J 2 v N O ri r n O O °1 U e- 0 C M W a 2 O O O O O O O O O O O O 0 CO N (0 If) t r) N I— N awsOwzI' u- - zwcc m > 3w — c7it a ein 931.06.1. ;VV �rV C. W w p g = (O i O 4 rr a v s+. . O 2 Z Z a O LL U m a IL T 0) CI tu H tu co O H v .-- ce O J CI CC w a a < 3U � d ui t= Z 4 C] - Lu 2▪ Q ' O G U Lu [p a O 0 U 2 O 0 a Z 0 0 0 8/-- Z cn LU D N �_ CO CO w $a5 - N I— � o 1- _, E a _ Z 2 — - CC Z Z 2 -CO WQ • 'J - 0 LU � 20z C NF- , Z a_co Q cn a (1) 0 x ¢ m CC = .C3 -- w ° W Z W QE 0 J CC U 0 O (.0 a a O r J 1 ta a O 1J J O O C) U O Z.. 2 - ;., O - O y `.t si+ g a � U C.) r O 2 O 0 0 0 0 0 0 0 0 0 0 a O O1 CO N (D to Tt M N - x0WZ - u — ZWiC mr a. ul 3w — C7 = - y a U• l S I 1 ,.—90 cZ4.6 0, w r N a t o } e < 0 U Lao / 0 W Z 0 oi U ,00u d J W � 0) W Q el O 0il • N -a Z O _ a re co kLi w. a < 3c°i � 3 2iLi H z C O U . z d co - w O R Z U O s 0 Z N a — CC z a W W S CO n N 3 — w ' M ? � mow , a, Q F- �' ' 2 — 0 U'-- zR ON 2 0o �W C N - - z aE Q ¢ � CC CO D I cc Z W < ` a < 0 CC o O ue z ae O " Jia J a 0 1 6 J t. 41 U N U r: N T 0 0 u, J r m vv m O U r '"' CO • o 2 O 0 0 0 0 0 0 0 0 0 0 O OS a) N (0 in d' N v- I dW CCU W ZI— U. — ZW S ea >- • W — C3XF- 0 e i 2U , *90‘ti:bi Grl Ca Y O CO Y CD //}�I m O F. V CN V CI- ( 0 W z z O ti 0 w p la Z CM J al W Q I.. cr o a N Z o = O - a U 3 ov eld LLi F-: G 0 U z co 0 fj U 2 O E r U Z o O s Z — to W LPL W w I- CC W e J _J ("' 2 — cn U _ cc z z 2 � O w a m 0. z R O cn 2 Oa C N ,_ 4 � � a CC c7 — ai c W Z 2 UJ c � p CC o 3 2 O V /� CC V z a O O `. r -J Q i C W q O 0 i N. N 0CD 0 0 W C CO Cl- m C el 0 2 O O 0 0 0 0 0 0 0 0 0 O O CO N (D In t fr N A r H t O. WCCUWZF-- u. - ZWOC 03 )- ' 3W - O2I- 'CO A $ 0 .90 13 • Ca W a Y C) i 0 '- i CO N W O 0- 0 N .., W ZIll O J L4 U o, CI 2 N O CC CD W • C7 O N el. O N 2 J W UJ 00ul W mod - U Y 2 ? a. o O tu ct a ,— Z O $ ° N Z H- am' Cr 111 _ n N_ W LL v) m v' i t W 17 - W _, c Q _ o J y m - (13 C U C © z Z ' .r O_ Q R��77 N °� W �r y C i III ZQ :LJ O fn O N G. N rQ a. o Q cc x E CC =Q C9 y o W z W °' Q- i lii`� Q in CC 8 H a th CU N = T. a _ _ O a u1 J N a a o— t. o N. _j {) J U O U v- n O O 0 W = U7 r • oU G-- i co O 2 O O O O O O O O O O O - O 01 Q0 N O In 1 rl N N a. W cc O W 2 F- tL - Z W ' m } ?i W - a z i- gco 5 N n1 c- 1 a O m a r O S c.7 i I+ O ^- U U. O n W Z J_ O u U el p 1` W o, w a . O g NJ 6 Al 7 0 x p t el W g g% < 3U 3 ± al z d 6 U c a 0 U Lu 2 O R Z o U O e z r "- Ncc W D NJ 3 — W coW m H J CC w e J cc ? ai O 0 C o N w Z e Cr' LU z ; o (7, - o = � G. H = cr a H(I) m 1 CC = e — w V Q w Z W G -0 O < y R O V J co CI N !� tI e V 2 E O a ' r tu J a. 0 • NW r U CD % O r- M O O W m a co O 3i,., o ' N 0 z O O O O O O O O O 0 O O 0) CO N cD to d r'1 N ,- . r 0 a. W CtOWZH LL. — ZWce al ) W — ( ZI— i 0 Z co 7 03 w V N a r O 5 C..5I S U U. o _ N W 1 M O w 0 03 0 t. LIJ 01 ++J a in c, < o eg � Z 0 N ..1 M WE 2 J W O to oma3 � 1- 3 ac +iii ai 0 W1— UOW W Z 4 0•-' = 0 Lu CC O z f 0 0 o N S� cn I Z W W — D N e co m L c w w _ I- CC } = Q W e -- C z = = 0 of Ecr W z7 Oa 1 o � Cl.. • N N Z a U)- cn cc ¢ rZ El _ CC — (1, # W Q tu � _ a CC o a a v C.3 - 0 0 _ 0 i d a - O w -I - a C wy al J 7 U i in O N. Z.. 2 r h 0 0 m . • S r m O 8 0 o g CO — Z O O 0 0 0 0 0 0 0 0 0 2 O OA CO N cD in 1 N I co a. w000.) WZI— U. — ZWCC C3 >- 3W — t!3 = I- 0 Z a m° _. w Ca ce N O S 0 (3 t ra 2 Es. o O s N uj fi zi O u. 0 m O Iii • 1 � � Wa C. us C 1.. CC 41 CN1 Z Il` Q ~ a►Q JO w d < 3v l- 3 itui rid I m Q W - US LU Y W 2a O a W z CL co 0 0 w Cr 1 a r Z O O O s y Z w Cr w U) > o Q 0 Z 0 z O D ¢ n) W Z m C/) W z R11 0 a) - O E C!) H N . Z - N J Q Wi - 2, LL Z W p - 10 O N o J CC 0 < 0 O a a i 2 a • O w `3 N 5 aN a g m N 0 • ai N V 2 • A O O 5 o W r m p. a , v u0 0 2 O O O O O O O O O O O O a1 (0 N l0 col 1 r) N r N CL W CC 0 W Z I- LL - Z W CC CO >. 3 W - (7 2 F- z m Q 0us cc 1 w / J� _ PiO D r O S C7 1 2 Cu U Cu a O C h Z Z 0 0 m o O cr, it a t N O N cc O a N -i Z OJ _ O rcz0 W ¢ ui z c o W oc w - xw 3 m • ZOO z0. OJ U w O Ir O s ° cs, Z W Y W zr w G c� CO � N � c W CD w N H CC w 0 Z z Z E 0 - !!J zCI R _ 0c 3 O.i CO N_ � Z ae cn < m � - W QVi o§" Q CC 0 < O C3 U C'3 N i a g O " , N J N > 4 1ri; g ,1 N U In U .4 n 2 — i° O O y LIS L 1A r J o •G M U n r) i O O 0 O O 0 O O 0 O O o CA CO N O in I ri N - . 4 W o: U W Z 1— LL — Z W Ct to >- 3 W — (. S H i 0, P m Q 93106 ' 01 w to d a tf 7, O 5' CD O V t:. M 6 y N W 1 Z W ua O u. 0 Cl Q tf. c4 ua cm Ili C O m• a - z 0 Z O clQ2O w a g < 3U � 3 dew zn a c < � Y U uj . m a O U 2 O O R z0 O s z w- a W CC to z 0 r�n/� T.n NJ vJ m `� C' ci z W - w 2 < F- we m Q H 5Z g — 5 U — cc z °z 3 o 0 O < w ` E U) a ry N "' a Z 7 W za. OGA z o � U) NN , z � E Q a Ti CC a W Q ▪ CI CI CC 8 _> 0 N 0 N ua ua • aa O LL r YJ J v- a a O- VI J V J r. 8 r Uc N gN O O `n W L zo T- 03 o N O c c7 U N N O z O O O O O O O O O O O a O O3 CO N c0 In I ri N 01 aw2 U wzH w - zwrt m } w - C7 = f- . 0 z O 931.461 is ca N x ICJ i O > DFM �_ O U Sa. A 0 a N ui z z J_ O . .. 0 N O 2 N O w ta la oo T. UJ1 ° O a N Z OJ X oa. °C aC ui i z o a U a 0 U S m O O c- Z o U O o Z co w CC tli mc . w .— w2 Co F-- CC wa co Q Cl— ;: co 0 v`- [L I Z Z 2 L O CZ R N h a 3 (n . W Z ' • (O 2 O Z 0) LI cn a CL Cf) a a) CC CD ? co ` LV Z �, o 0 Q J Er C O z a 0 w J j a •e 0 1 < J a O Z C.) N 2 r h 0 O N ,- is 11° riaO • N C U T 1 O 0 0 0 0 0 0 0 0 0 O O 01 00 N (f) In I re) N r Co - __, au.l2UILZI- u. - ZW CL CL >- ut - CITi Z N w pC m (A 931.46, i w W r a. 0 r L, o t7 V (L N o O Y N ..r W z Z W a IN U 01 O J U. ONE W G r N v CC O A � az2 = d W a � a30 3 dd ui z c di ca a w O lli x 2 ° 0w 2 6 m a J O cc O V ill cc O O R z J • 0 O - z K (n W C _, co w N W u=- H CD m f m t W o I-' CC- wa - Q F— Z . — E U _ o M W O Li LC N < w z E Cl) W z ` o `er 3 OE CO N , a aN Q (.0- cri cc ircL_ CC z � 3 W Q Ili 0 CC 0 O a a CO N i 6 0 a co j J a v <• J 7 Q J 8 el o 2 N :1 O O y 1' m a. • ami 0 o N O a z O 0 0 0 0 0 0 0 0 0 0 • O O CO N <0 10 d' ri N - ti r CO aWd0Wz1- ti -- ZUl cc >- 3W — (D = I— zcl a r' s ' 3 co ` 3106' W gi c r a 0 " O 5 O' a M -- U La. • O o n z z w O O m Q J T. W c'l Cn Q I- N cc o i .... o z O S �a3vi 3 w H U Z W W 20 3 O Y U Z Q. O 0 W m -I cc O O R r O s ° � z PCn ; z C W11.1 S h D (f) N o 03 w - � LU 2 Q W o J F- a . M — E 0 - Q z 0 O 0 o w < a zE U) UJ z 0 a 1 O E U} N Q a- N Q (.1)- co = a" = CC O y W Q ui O U CC 0 0 _ 0 ^ U, r i a A - _ O m W J J a. O`~ M 2 -J M 6 J 8 N 2 N O 0 2 W c m c - U O z O O 0 0 0 0 0 0 0 0 0 S O al CO N t0 In M N c N a. w2Uwzi— u. — zwct m � � W — c( I- P m 0) 9,31064 ' ce Lal o 03 =Z CO S O S " (I a U U. H O O v N Ili Z ui 0 J_ 0 u. Q o, 0 O N LL � J w 0 r N Q 03 a Of N ¢ zo z a to 110. 2 O w �, ;:l � U3 W OY O a � y�j m a -I 0 g r CC,74377i g 0 Co Z M Ni w r.. w CO w 'O 2 I- J 2 Q a o z 7 CD O Q w < Q E O () Wz Rd Oc7,1"43 p E U) N ; ,-. d ay Q D 0 — Co U IW Z ea w 13 O Q U y J CC 0 T m O a it = a d N z a a 0 co 5 a .- a — w N J U i (D U v 2N 0 O A w m 6.-4. 2 m 1.- 0 z a CA CO N kD Ii) t ri N r. I t,- y - _._ a. w ¢ c) W ZI- U. - ZwGC mr 3w - ('3I- z° ul a 5 2106,'' N Sal W o g = C) t 0 I o C3 OU 0 cm — W Z U1 o u 0 m p W J , cl zOr T O z -- a 2 o w g H a3Qi- 3 ed di i z a o Lu ma w O UJ Y w m -I CC CC O 0 R — — Z - O 8 ° z P: coa — — W a CO D N a W m C%� a — — w 2 I-- CC W o J Q 1-^ Fr) : — — — E U CO 0 Z O ' m 0 W zR OCT) � i of U) a N , z aN Q CO 0) cr ac E .. CC — c } 0 W aall - - w a < I 0 .0 c 0 - a — — cn i d a — — 0 w c0 — — W -1 ,- > a - - 1 2c.) — — U r — N , 0 t» W L -c m a O• G - U co A 0 z o o 0 0 0 0 0 0 0 0 0 - o 01 co N c0 in f ri N t- - a_ w2UwzH u. — zwct co ,- 3W — 00II ' - 2_ tt. 3 .464* • m W W IN O m N O S I O O H W z z 0 w U al p IL u H 0 W Q CMOn ^ 7cr N � z o J = y a► a oI- it w I—I- U z w w co Q W Y Z CJ z Lu a O V uj 0 O O o 0 Z cn I.— � ' = z D N c W Cl)I — W M `— J Q I— cii a a (/)- o z C] 2 CJ Lc w as z W aJ O vs i O a V) a - cn ¢ a co Z O co .c W la a O Q C a U 63 a W a 0 " >r > J a 0 t. Zia. Z 0 V i M 0 c M 0 0 O w c en p• o CI C U i CO N 0 Z O 0 0 0 0 0 0 0 0 0 0 2 O 0) CO N l0 If) tr) N c- I F. 9) a WfcU W ZH U. - 2 Wcr m > 3W — (c} = I z r A 1 m C/) 931.06!". co Cal a o S - c- I c.) fs. n O e C N W 2IL M J_ 0 T. U w p ua z cm J r N P .. O w N O O r AE 2 p W (7, `.1- 3 U od iii 1zd 0 ma w O Y z m a a a w U ca Q J V 2 CO 0 0 V O s Z i . cc cn - (12,N LU t v U? .O W co CCH �_ o J m Q F— V) : 2 — 0 C/)- cc z o O 0 < W a„i w E N Z ? CD W z R O C 2 O m W N N � a aE Q m C7 cn = W Q us c } 0 CC U 0 U a acrl a N LLI _ Z_ a 0 LL r- Cr) N W a N a w N 6 J 8 W r 2 0 O N r m m o N co Y O G N O U, N 0 Z O 0 0 0 0 0 0 0 0 0 0 2 O 0.1 CO r (0 In r) N ,- C6 H 4. LiJ CC Z1- U. - ZWCL CO ) tu - <5 I - z co S m uu) T T I Cl k7 w x Csi N O a O 5 c, N (7 5 U fs. O N W z i 0 u. U m p J Q - cr ! 0 O J M a 2 Q W ti lii i 0 C] w < uJ O Y W 2 a 0 < w cu Z cc uui m J CC 0 a n- Z o O 0 g Z .. W D w w T. V) D N a �^.W m 77 .12 I— W Q J o J F- J ? 2 J C 0 OW < G t0 (n fl o N W Z W < .Q— O Z 2 00 a Q — cJ Q (1)cc Eca CC a _ C W Z .0 W o 0 o 0 i a a. 0 a J > 4 o— o WUq ` J a 0 U Z N U of N 2 .- 6 0 O a `n r m v d • a N „ 0 U ai 0 Z O 0 0 0 0 0 0 0 0 0 0 O Dti 00 N cD 0 t r') N r n In 0. WCCUWZ1— u. — ZWLC m >- ' 3W — C7 = 1— gal P C g 931064 co w u, a O ≥ cc7 N O g N CO Z 0 LW at O U. U 01 O 2 N O 0 3 N ' l Z O O • " 4 O W ee +ii II: z a a co a 2 ° 3 00 U 0 m a 0 U Q O Z E. CO LI I` CC w W U) D NI 3 ( .0 G a W co k- - 1 CC co o J c — 1— u) 20 g — _ U u) o z 0 a � a ;0 o � 2 o1 u W N z a E Q c- n < CC d ¢ Z — CI) 4-" W W � Q ¢ O CC8 J 0 a . O a cn M_ 2 a • 0 •T. Z., W J T a_ o — N w Jtn 8 N r 2 N 0 0 °' W t m O. C O CI U , 0 2 O 0 0 0 0 0 0 0 0 0 0 o CY1 CO h tO to $ r) cv ii aW c[ OwZI- W — ZWCC CO >. . W — 02i H Zo o N S 8 c 19O. L:6 m w W .7CNI 0 i 0s a R M V 0 • Z z Z OU. O OD G J Cr. �cm w C r 0 v cr O ae N .J O M cl m LL I O W s < 38 3 2 W F- Z Q Q UJ LU m < w - Y 20 0 a (-) Cr O w O CO J V ¢ O 1 z 0 O o Z �n ' o ix W W LL co co . — t -:c w (,3 Q W e J I— (7) Z J 0 - cc z ° ' n� ( O z o $ ill w Z "3 Cr W Z ` 0 7) 2 O o (!, N M , z � Q Q CO u' CC � � Ct = 0 O c W 0 = Q H O � � 0 Ncn J co z a _ 0 LL - -- § 5 a r 1 N J § U Q N C ci 0 , 0 w G r CO 4 G a CJ C.) CO 0 0 0 0 0 0 0 0 0 0 0 O ai m CD 10 d M N m a. W OLUZI- u.. - zwct O )- ' 314.1 - O = i- Z N o 1N ;;90 6 N WUJ CZ in CSI i N ❑k /� 1 U . V 0 N W Z i D O U. O N ❑ LIS W w CIcn M ` e- g g v a$ oC 0 NJ O a Z _ 0 W d ga3 � i- 3 iwI-Q a w a < .< U.1 rliU Q] J 2 O 0 R i r O Cl,° Z H z w m7) $ trt m W - w 2 I - > J p 1 ;0 5 E 0 ? ° ' O - < W ₹ a E ❑ N W Z C i w Z aLJ 0 to 2 O V UJ N � a, z a � Q CO E � CC D CD � .3 W o Q W in Q 0 J CC ° -.1 O <O N Z a:_ a 0 T. . a tr Or-' W ;, 1 t4 JJ iv 0 CT) Uri 2 .- 0 0 N CO v- m i- 0 au, ci O z 0 0 0 0 0 0 0 0 0 0 0 - O Cr, 0o N (D in t i) N <- y d W ❑ U Ili Z 1- u. - Z W it CO ).- . W - C.121- 1. Z N N _e a) Cl, ao Ca NCZ Co 00 5 C N MO Rs ( Cs. V 0 N U z tu 0 u. u U m O w J CI 03 C7 I < N ,3' cc . _ 0 a NJ C7 m 2 0 w 0 d a, a3ol 3 et iii i O Q 4.1 UJ cOC O U2 Y Z a O U W m —1 Q O Z 73 0O $ z D N 8 W - w 2 1-- CC LiJ € Q J H s0 0ci, U - C z z 2 •• 0 O d N y w Z 3 (f' W Z R� o � 3 Oz C N tz , z �_ n Q CO c CC Z E a w0 O a °' E C0 2 0 i a 0 T. ✓ J a i J a : 6 2 in Ur Z. 2 - o O H W t r m a O A.m a t in O z 0 0 0 0 0 0 0 0 0 0 0 - 0 a1 GO N to In 1 r') N t- N G. w2Uw2h u. — ZU12 m ›- ' UJ - 02F- 1 N a 1 ct 2 aI W W O N ` 0 U G. C 0 h •_ W 1 z J_ O w 0 w o z c4 WJO w m Q O H v• ^ O O N CC 2 "j W y o; < 3ci1- 3 Q uiHZCO mo - Y U Z d 0 Lu 0 W C) J CC 0 0 R a r Z O O 8 Ncc W C Z W LLU 7. N CO co rii C W w m — 1— CC I_ J s Q J 'l 2 E _ cc 4 2 O CID p Z Z 7 0 • Q N y u N Z E Cr p o w z ' 0ill 3 0t C N r- Q a = Q (n co cc a = CC � w Z W o < O Q 0 U J O e it 0 0 CD N LIJ _ z 4 0 w r Cf iv W J a i 0— Ili • 1Zil . i. OV U co N 2 r t° 0 0 y w a Om I N V CO 0 Z O 0 0 0 0 0 0 0 0 0 0 O a) a) N (D to t r) N g N Q W 2 U W Z !— tL — Z W cc m >- • W — (7 Z h l cu I I co (I) y Ca N n N M 0 r o Y N Iii 1 z UJ M U. U. O m 0 Z N MI O it co W Q a O N •c - C[ w N J O • c') CC M J W iA 0; < U k ee Iii rzo 0 tut— OcDm V:1 W Y > z a0cs uj Q O C g z di_p a U O 8 W 0 Z H CC LL• al ma—i iJ m M W ` W }— LL �J oJ.J — Q z E O Q 0 N < w N 0 v, c Z E Cr N - , Z a = Q cc Cc' -c U Z CO = . CC U tu aW < Q Q cc o J CC 3 O 0 a.-, a _ z a N 0 r m J ,- - > 0. A a — Lu co ca J co N U CD O rs N 2 - a, 0 - 0 H u+ c r o Q CI U CO N 0 2 O 0 0 0 0 0 0 0 0 0 0 • O a) CO N (0 If) I' 1 N n r co CI_ W CCU UJ Z I— ti — Z W CC m >- W — (r} 2 I- 2 N C 1 SV) (1, Cil 7J as D N U 1 Ui n 0 J M Q U :i. CsD 0 h - W Z M W 0 Si LL U w 0 la cl rn w Q N r U NI Q 0 m ca O Z H c) • I z a. w IS < 3v � 3 ceiu z o 0 ui co < w — 2n O < W m a0 U Lu -J CC O Z - o U — ¢ z CD = NI w w m $ cn w I wo - m Q H cn _ 5 — o 0 s Z ° 2 �' O 0 a N W Z • C!' w z R 0 us S o a U. � z � Z Q N an 1 ifccnn Z ? .� O -- CO d cr w u, 0 0 H m ■c 0 A O co a La al- . a . 0 LL W a U Q• J d U Z U v r 0 0 y UJ e N r O O a U 0 z O 0 0 0 0 0 0 0 0 0 0 O m c0 N (0 if) d' ri N i- g aW CCOWZI— Ls. — zwcC m >- Lu — O I 'Ai CD o N S Cl Sal O i O ,. '�RI U Cr. V O 0 N W Z J O Y. O Of r ru 8 ✓ v CC O ra a O 4 X O r c7 � 2 w m coa UI ed Lti f- Z G CO UJ ton Y Ul - Z U 0 CC O U W Z co J Q 0 -, 0 a Z • O 8 O Z w w H m � S i g - ._ - LI CL- > 2 Q W o J CD 0 I a- < I - z ; m Z C cr 0 W ZR° " _ — o � ow c!) • N ,.. Q am Q (.1) ? x "- ft N CC U cn c Z "- V Q wu W o -0 0 Cocal cc J U O I CI IF) U ui Z a b o L a J N La Sa. W N J M J 0 -r i N U ui it 2 '- 0 o 0, W = C- n O a Cl U 2 O 0 0 0 0 0 0 0 0 0 0 2 Q1 O 00 r O In t tr) N 1- W 4w 2Uu! ZI- u. - ZUiI m ) " 3 W• c m U (/) u, W us a T O 5 C? O U Cs. 0 N Iii 1 z W O u. O co in z N J O w � o> wG O I , O E J w o M o; a 2 3Ui- 3 tjei LLu H O Z W w U z 4. O O ¢ CD J O s z o z O s c ../ D N R1 w co ? `© 2 LU — �a J J o a C!) o z o z _— E o ¢— cc I w 4 z w 0 O N Nw{ W Q O G7 2 O d C/, N u~i � Z a = Q �_ cr a r CC z El " — " 30 W w .� O p Q a � C J C'3 CC 8 m O ( O ill N _ _2 Q. g , 0 T. N A a a. — . J e J § 8 0 N O M N M - - 0 O a' tAi J E mm a a 2:13 8 Cj N 0 0 0 0 0 0 0 0 0 0 0 2 O 01 a) N (Li (1) d' r) cv t r y C. wtrOwzl- w — ZLU T CD >. ' 3 Ill — C7xr- Z N m0 1901C ; - 03 Li ce w O H m M g o Y ti 1 z u, J_ O w O co Q J w cha) lU 0 r co N . r Q O F N M Z ° o a' Ofa30. oUI- LU 3 Q di : z O d s a _ V z cc tt i O 8 0 O l= Cil w CC ry w LL (1) m LU w $ 2 z H CC L wo can Q i— c i — CO Q Z O c V O Qz o y z O � y zO N CO Cr N y U1 z F= o m Q cn � Q aO C U) V' ¢ 2 c O CC Q i c o < c 0 CC A 0 Y •i 0 —J m V O1 r tu Z a g _ _ 0 v- J O J ✓ O O in °' U N 0 0 0 W t J m a� � 0 S) V 0 0 0 0 0 0 0 0 0 0 0 O OS 00 N c0 In d' re) N E r y { awQUwzi-- w — zw2 m )- • � w — (} II- z° gli a S l 2( 44. 0) ra = C., �- 5t g V Ss. C7 s N W Z til J 0 'i 0 u) p IAA J w � O9 W COCU CC O O ►. C4.... 2 J a <¢ 0 I W bcuiIL: za a w c0o � ° Y 2 U W z 0. 0 ,, W v W CO J Cc 0 Q n F Z o U O s Z cn F_ w cc z = D NI o w w U (1) co ZO c W C M y H LL 0 Q F— '0 Cr) CC z o 2 ° 0 0 Q CC LIJ Z ≥ o CI ZSO w W ¢ o of F- N z ►= E Q c5 W Z E7 — — Q q 0 - 0 a CC 8 0 a z a o a m CL O cl L y O V CO N U N A 0 O 0 in trn r m - N O O CM I N 0 O 0 0 0 0 0 0 0 0 0 0 a O CA W N 0 N I r) N E _r y CL W CC U W Z F- W — Z W CC m >- W — co Z H. o O Z O a I - — , N [a W er- O N .� C a N. N W z Z til lil a0 u N O T.2 Cg W J O L a %n N d O I. AE 2J w 0 q i» c . OI I- d i[i z o 0 a w m a s ¢ O o 1 i O 8 0 z N N W a2 IL Z (I) — w 2 a) I-- CCu J `- Q W e J I— 7) 4 M — o — c i z o z 0 Z > > w < ;0 o v y o E CI Ch N cn , Z a c Q _ z 2] — w" w Ct C7 4 Q 111 0 LLi a 0 8 a 0 0 - 0 u O in ci 0 N -1 & ui • • L J N N O 0 0 N 0 0) h 0 0 m ia m a o co i O 0 0 0 0 0 0 0 0 0 0 0 0 0 OS CO N co In 11 N E I-- y Q. W4' UWZF- ti. - ZWcc m � ' 3W - (' IH Z w i 5 O , . COMPACTION TEST RESULTS FIGURE G-35 - 130.- .'_-+ BOREHOLE NUMBER k,' k SAMPLE NUMBER GT-123 SHALLOW . I I I : \ DEPTH OF SAMPLE 0.0-9.8' 125 I : f i : I i i, . \ TEST METHOD ASTM D698 titTHO0 A . • Z \ 'Yd max(lb/cu ft) 117.0 12.5 'l O.M.C.(%) , i DESCRIPTION Sty CLAY with some coarse to 120 fine sand ' .'• w„ (%) 11.0 - 19.3 (CL) • 115. . w (%) 30 S . • I ! i ! s•.* i I W p (%) 0 ! ' j z 1 ' : :' i i 1 ---y---4,--•\ Y t '% j - _ _ - _. � �'�:._' :_ _`� 110 :.._ , CC 1 Z 105 . O 4 •\l!2.80 \ ' . -...•!-,•=•.---...........--2/0 • • W 10Q , I i • • , '` • CC C] 96 . i I ; ! I ! ! • ! i • , ! I i i , % I 1 , ;\_, \, l 90 ti ---- _- , `v ,' 80 0 5 10 15 20 25 30 35 40 WATER CONTENT, PERCENT Date MARCH 1992 Drawn rtitS Job No, 9132403 Golder Associates Inc. Crtedced DR _ Approvedi 971064 COMPACTION TEST RESULTS FIGURE G-36 130 ; BOREHOLE NUMBER .: iNi N N SAMPLE NUMBER GT-t23 DEEP i ; i . - t l\ : \ DEPTH OF SAMPLE 25 125. ' i • _ ' • ;s : ±•i TEST METHOD ASTM 0698 NETiOD A _ I j i r i. i . L 1.i !'. ' t '� S 1. lid max(!b/cu ft) 108.0 • O.M.C.(%) 180 -_ . DESCRIPTION Silty CLAY with little medium to 120 - - - L• fine sand (CL) ___..___.-- (; ► ► ' ` ti 12.9 - 202(CL) 115.- 44 - _---�._ - i k_ W L (%) u. El 110 ._ -- -.- --- 0 Z ' 105 • _- -- : ` 'V O' i _. `` : . -.�f 2.80 a , . •; _ _ ° �2.70 2 ' i , 1 i `\ 2.60 _ ..._ . 3 100 .. i _ __ __' : I i _.- -.' ! , ; ; , ; i : : ; I I 4 1 1 • : \ \ N ! , . ! . 1. \; \r t -- .t 90 �.. —_.—.—._ .—.__ • - • • • i A. t . . ..• r. '.85 i , I ,^"� - . • — — i i • 50 0 5 10 15 20 25 30 35 40 WATER CONTENT. PERCENT Date MARCH 1992 Drawn CG Job No. 913-2403 Golder Associates Inc. Checked DR Approved WELI COMPACTION TEST RESULTS FIGURE G-37 _ 130 _ 1. -.... BOREHOLE NUMBER 1 ' SAMPLE NUMBER • , , , t Y ! '. DEPTH OF SAMPLE x-2(7 125 1 t : -r. TEST METHOD ASTAA D698 METHOD A ` t ' .� 'Yd max(Ib/cu ft) 116.0 I • k.k •'"' O.M.C.(%) 135 t DESCRIPTIONSilty CLAY and coarse to fine SAND 120 . • i \' IN, (%) 16.5 (CL) 115 -= - _----�---� yy (%) 29 L15 ' 110 Z 105 : . . • r l 2.80 , 2.70 ` —260 0 Iii 7. 100 ; D 95 ! i ' i ii ii ! ~ti !`'1'e • BO 0 5 10 15 20 25 30 35 40 WATER CONTENT, PERCENT Date MARCH 1992 Drawn MS Job No 9t3-2403 Golder Associates inc. Crlectced KM Approved WE7H COMPACTION TEST RESULTS FIGURE G-38 130 _ 1' ------ -- BOREHOLE NUMBER SG-24 S , '-."', SAMPLE NUMBER I 1 ! - -1 ;‘ ' \ DEPTH OF SAMPLE 12"-23. 125 • ' ' ' I : ‘'I \ TEST METHOD ASTM D698 METHOD A • ' • • 'Yd 106.5 • `,. maxtib/cu ft) __ — o.M.C.(%) 18.0 r DESCRIPTION Sty CLAY with trace medium to fine sand (CL) : 16.7 6wn (%) i 19 O ' . I ' i f 1 ''� 1 p (%) 26 U ` I ≤ 1 r 1 - i : i 1 . 1i m J __ • i 105 C • —�—T - - -. — *•:�2.70 _ _—..__ —.:,.! 2.60 W ,‘ ,../---- 100 . ./ 3 • • 80 0 5 10 15 20 25 30 35 00 WATER CONTENT, PERCENT Date APRL 1992 Drawn CG Job No. 913-2403 Golder Associates Inc. Checked TT Approved WEH �+^F.1 } s.aa,`.,,,dA'1Y'Rt5 f..a p v4`"t-h+«C2ti*rY..'!''^te",F.:r' ' "'.>r '5' z" •lpp S.a ',"" , y.L;$ `d ,0„r--l'4M.4' 3e��'.1. -•i}r''� E+yj'��d Xn IYasi:ya � *kv e s.. a u 4 V' 3s7+a ♦ ^R" $ s! tt. ts�r. ,�. , . ' �1.-a,o6^Mr;t%yYC Ii-"X+ �.!,., �.,xT ,c/4.,,,,.;,,,,sca.,ti„..axd ".`'s f 'hY+',-.b� kc gt' .,a,'. 2 " �+d a� "' m` .'r4</.;4;:'-'''" k - '. 4—' A 't, i i. yts t ; a.a .'' F+l",",sa T' r. s � ^s sc!w- , :,...„"1.--,.. 4.1(44:4414%..1-4e.t401L_5h ..1s y tyK , .,. :41: "kIJ"4' are' "M1'%` 'i 'e !#'Ykl.;atf^i52}.t J7 'sW..rw??'.M..t.".. .iR'-r+' :i'�t. ^t+t.;-z" 7[�*,,,. , �. tvdy"+c>4d i.a�r �,J•'..: w ti' s , <s: - �r1l'r -V, itO„ i '.e rti. v r-4..I., ;a X q -u , . �. . ;r .{ .wr -4.44';;A-4..',,,4F .f}twry - ro r\� n $ 5+"i n-' d -r s t £ -\;I. 3P re W x k be .rv:");..1Z1-', e:.. , z.",%.444,.,j“,/ sn 'r R '�v \ ,t, -. a!1 Y i .4 e � 4. i 4�. R k z \s- - u-a M V CY. F v t ° M :'':3 y i L $ A F 4 3 a'..... 6 w f a. �kZ-k-:N ti 3cm. x"..- . ,�r.WvpzkY(+' >y'i;k,E PaR{ ?r >r ��-', �$• • h . T5 .1 i c.I -1 FI74,J X 'S1 t A.. Y ."f N.i.t yA\ y1YF�'3 .lCA4 MIL 'CP i.�'[' fn' •S•r 0k. '.S 4. !� ,t �' �'. :s~. 5 a a bs r k i t fy. t C : s. t VN:y.,�f 1,,,}y�.�f,+,v_q,ra, l't .�V� js YyT.i ' {EA AF.I' S 4y .*µ4 hi, .,Xpe' b .. a ', A ..: !.e'�(\i .- ,. 4.sr{' `^i}{ Y41f, Y 94:t 4P Y` �:`,. y . �S.bCSY K"''F 'yF l S .F .i 4'- SF �i i{ wt. • 4• .�.� �. _ k 'tiAIN .- IN-SITU HYDRAULIC TESTING IHVORSLEV -= k• . i ,,: `.� - CURVES AND CALCULATIONS n �. F ia+ -'s`rt is a '§ M. r �'iw-¢,.t,.aYk „3. >�fai•xi; :'c }. :+.sM'}'�.s..+b. " -.,w, 3..0^..,.rt L-.: wp. ...�i.'d-.4'V}K"'a..iu...' ..,A 1f:! • .. -. * j'.• Fn']."v}in:.`aiYM" Fa l,i,'y7• K r 5. F . 5a� t��2a+•'�ee � h��' rh��. e �t. •..� 3 F ''\;),-;.' -, ,.4.-v +y Y4 S �*' ,r,nr':..ke 4-.YJ4 [ 'i} y } # M 5 ie r, ¢ ,73 'G p�r.'- b� x Y .- t:„.yP'z'". s4.1t} egv''... rw �"rti t m .� t+R r w.S it h r. r t ti 3. • "n\ 9$ry� K ay e+ ;g: ty d , '` —¢'+j'i o,A J-� :tit H "n V 'tct 's : aS t h e to rR { +7r k ty +se{T' v','e .,;:l. s• ? 2'77 .4:c tFr`iii v i? e 1 j ma` $` tt 1 q:.,l k f r �.0 t ° '� r K' i a' 4 ''xx_ Yy rt c� a 1:.c a +e yy rt ;;c ' i a..L. >< ,i f• • i ,eSife$'is \� A t )\ AY 1€ .c a - t ayk a r: s h`r v:' fm.t • LL v Hk,,. . '' C��'e , c '"^ a�nF'y iV)94^,,--!2b!':dt, n.. Yrt�,c `atA4yt"7 i}tY > 'n;v.. ^'s �� ., . N��. - F.FeT, + .. C� t .. y a .ux+le-"TY"u},ieei ' rte . '2..'pt ,hh T >« ts., „t,,. f“:4^.:Ylnv a' vw '2+ TY.., 'cs2 r,, ry£ �.v-,: {{ .s. „.t,i t b 5 +w`` fy 1,5-s„ ?ey n r 4-• c a,7 .yi Jstr"n •r 4 2 .7;�1 v v r sti }1 % _9i Y rxnv 4 if° ?: ¢f.4, " �i3 ..4k y .,:'tH"N s ,i It x :'. 'E7`,"" 7 �t v Y .n n r„�4 s : yrt t e '#*t1 {r - ..f 1 3 .� + .i : . u ''1P,, 3— ' 4d f r C P 5 , 4 + - t k .9C " t �. } ';` n +. fs> : . s.� a w ✓ 1 ,..^a. qx .1'?p� a n ,w t :� w 7h ,��a�?1 r r 41-5 h 1. y t 1 t R v ,„ t r ^N �"t '4. 7 'i% !. 74.43 $ ac!₹sf' a'.;k f J 5 A. Y -``"M s' y,, ♦ r• iy'S em )2 a 4 a ',1+T[kinTM - F 2:421.2 .27``i JZ, ti,c2)2#1 M'+ , -;. r� x ' ', n5 e i e t-, n yr3 , 'ali1St +t`r ' �"V k44,A^}x ' t'' �' �',�' +H' '''ti+� "'.t f t §.x -e as . 't-Vyk . %i z'°4t0.-6t� "E...- �5 k• 3-44`;.- .1 �t . }y n ,o-I Z.+z/:`'}"°. T.4>-4c44;',.: 2,-1,4,4.,”;wn ri; . �t"tiFft'w5�:�isa C` + I.,'AXin ry'^Ff�R \�. �+� '°y.'55 45Y -,... . ,„ t # . £`.w.h °k'F'`, ii' eP �'.u_`YG�tf , *.�""m? <c 1 1 r r .--- . s....,. G.� N. Q U CLI T 0.1 , "I C n - a z . 1-k T --} 0.01 I 0 2 4 6 8 10 12 1I TIME(MINUTES) S.W.L. = 25.21 ft.. (0.39 ft)21n(2(3.16)(5.89 ft)] B.O.S. = 31.10 ft. K- 0.671 deff = 0.39 ft. 8(5.89 ft)(7.95 min) L = 5.89 T = 7.95 min. M = 3.16 D = 0.67 ft. . K=8.29x10 cm/sec TTTLE HVORSLEV RISING HEAD ANALYSIS e,lGolder •MONITORING WELL GWMW-01 Denver, Colorado CUEMT/PRo4ECT DRAWN DATE MAY 1992 Joe No. 923-2403 WASTE MANAGEMENT OF COLORADO cH€ci o .IAC six: N/A bwG NO./REV. NO. CENTRAL WELD SANITARY LANDFILL RfV1EWED WFfI FlLE NO. FIGURE NO. H-1 931067. 1 K, ii { La 3 U A K2 U tr] ill 0.1 a u 0 1 GI -------_ _ z rt-T, I I I �- 12 14. 0.01 L 0 2 4 6 8 10 12 TIME(MINUTES) K1 (0.39 ft) in[2(3.16)(4.85 ft)] 0.67 ft S.W.L. = 15.15 ft. Kl_ 8(4.85 ft)(2.91 min) B.O.S. = 20.0 ft. der = 0.39 ft. L = 4.85 ft. K1=2.61x10"3 cm/sec T = 2.91 min. M = 3.16 (0.39 ft)21142(3.16)(4.85 ft)]= 0.67 ft. 0.67 ft _ 8(4.85 ft)(7.16 min) K2 S.W.L. = 15.15 ft. B.O.S. = 20.0 ft. K2=1.06x10'3 cm/sec d = 0.39 ft. L = 4.85 ft. T = 7.16 min. K(GeometricMean)=1.67x10-3 cm/sec M = 3.16 D = 0.67 ft. TTTTE Golder HVORSLEV RISING HEAD ANALYSIS MONITORING WELL GWMW-02 Ones ssoc7ates Denver, Colorado CLIENT/PROJECT DRAWN DATE MAY 1992 JOB NO. 923-2403 WASTE MANAGEMENT OF COLORADO CHECKED doc scuE N/A 'bWo No./Rei. .No. CENTRAL WELD SANITARY LANDFILL Revienco wai IFlLE Yo. IFl0URE NO. H-2 93 ..961'. 1 - w us O 9.1 v O T - C7 ..a C O Q ■ Z fi I 0.1 1 Mi 0 5 10 15 20 25 TIME(MINUTES) , S.W.L. = 25.0 ft. (0.39 ft)2ki[2(3.16)(2.60 ft)] B.O.S. = 27.60 ft. 0.67 ft dell = 0.39 ft. K- 8(2.60 ft)(7.80 min) L = 2.60 ft. T = 7.80 min. M = 3.16 D = 0.67 ft. • K=1.52x10-3 cmfsec 1TTLE Golder HVORSLEV RISING HEAD ANALYSIS MONITORING WELL GWMW-03_ lV ASSOC]ateS Denver, Colorado CUENT/PROJECT DRAwN DAM MAY 1992 JOB n0. 923-2403 WASTE MANAGEMENT OF COLORADO cxecxec jAc sc,," N/A Owc NO./REV. NO. CENTRAL WELD SANITARY LANDFILL Ac„, ,,,E F,u: , FlCURE NO. H-3 4. 931061 10 i 0, K. ~ U K,. Ul �� I °o J O (775 Lt 0.1 2 a- T, H I "'•' T2 .a r 0.01I, 0 2 4 6 8 10 12 TIME (MINUTES) Kt (0.39 ft)21n[2(3.16)(8.83 ft)] S.W.L. = 11.17 ft. K1_• 0.67 ft B.O.S. = 20.00 ft. 8(8.83 ft)(3.28 min) deo = 0.39ft. L = 8.83 ft. T = 3.28 min. K1=1.45x10_3 cm/sec M = 3.16 D = 0.67 ft. (0.39 ft)21n[2(3.16)(8.83 ft)] 0.67 ft _ K2 8(8.83 t)(4.0 min) S.W.L. = 11.17 ft. • B.O.S. = 20.00 ft. K2=1.19x10-3 cm/sec deff = 0.39 ft. L = 8.83 ft. T = 4.00 min. M = 3.16 K(GeometricMean)=1.33x10-3 cm/sec D = 0.67 ft. TITLE Golder I-IVORSLEV RISING HEAD ANALYSIS MONITORING WELL GWMW-04 O Associates Denver, Colorado CUENT/PROJECT DRAWN DATE MAY 1992 JOB NO. 923-2403 WASTE MANAGEMENT OF COLORADO cNEcxED jAc SCALE N/A DWG NO./REV. .NO. CENTRAL WELD SANITARY LANDFILL ReREwED , FILE 10. IPiGURE NO. H.A. 931061 10 t 1 "ge 1 v v iE_cti 0 i Q 0 ,4 p N —Z I T a 0.01 0 2 4 6 8 10 12 14 TIME(MINUTES) S.W.L. = 20.45 ft. (0.39 ft)ZIn[2(3.16)(4.85 ft)] B.O.S. = 25.30 ft. 0.67 ft deft = 0.39 ft. K= 8(4.85 ft)(4.65 min) L = 4.85 ft. T = 4.65 min. M = 3.16 D = 0.67 ft. • K=1.64x10-3 cm/sec TITLE � Golder HVORSLEV RISING HEAD ANALYSIS o Associates Denver, Colorado MONITORING WELL GWMW-05 CLEW/PROJECT DRAWN DATE MAY 1992 IJoa No. 923-2403 WASTE MANAGEMENT OF COLORADO aitato dee scLLE N/A IpwC NO./REV. NO. CENTRAL WELD SANITARY LANDFILL REVIEWED Wei FILE NO. [FIGURE NO. X55 ;106 1 I I K, I K,--...` I E CC U g U 0 _, 0.1 I L...91 0 I z I i F T, 0.01 t- _ T2 0 2 4 6 a 10 12 TIME (MINUTES) A21142(3.16)(4.35(3.16)(4.35 ft)) K` (0.40 0.69 ft S.W.L. = 25.65 ft. Kl_ 8(4.35 ft)(4.16 min) B.O.S. = 30.00 ft. deft = 0.40 ft. L = 4.35 ft. K1=2.07x10-3 cm/sec T = 4.16 min. M = 3.16 D = 0.69 ft. (0.40 ft)2ln[2(3.16)(4.35 ft)] _ 0.69 ft K2 KZ 8(4.35 ft)(5.89 min) • S.W.L. = 25.65 ft. B.O.S. = 30.00 ft. K2=1.46x10-3 cm/sec deff = 0.40 ft. L = 4.35 ft. T = 5.89 min. K(GeometricMean)=1.74x10'3 cm/sec M = 3.16 D = 0.69 ft. TRLE Golder HVORSLEV RISING HEAD ANALYSIS MONITORING WELL GWMW-O5N Ona ssOdateS Denver, Colorado CUENT/PRaECT DRAWN DATE 4Y 1992 JOB NO. 923-2403 WASTE MANAGEMENT OF COLORADO cnECxED JAC SCAISN/A bwc NO-/REV. NO. CENTRAL WELD SANITARY LANDFILL RfnEwED wE7l IFlv: NO. I.iGURE NO. H-6 83106 I( 1 , al \ , o K, • C.) Cl al U 0.1 p a F Q Z I I 0.01 , I I T, 0 1 2 3 4 5 6 7 8 9 10 TIME (MINUTES) K1 (0.17 ft)21n[2(3.16)(20.0 ft)] _ 0.60 ft S.W.L. = 5.65 ft. KI 8(20.0 ft)(5.11 min) B.O.S. = 30.00 ft. d,ff = 0.17 ft. L = 20.00 ft. KI=9.61x10_3 cm/sec T = 5.11 min. M = 3.16 D = 0.60 ft. (0.17 ft)Zln[2(3.16)(20.0.ft)] _ 0.60 ft K2 8(20.0 ft)(0.77 min) S.W.L. = 5.65 ft. K2=6.4x10-4 cm/sec B.O.S. = 30.00 ft. deft = 0.17 ft. L = 20.00 ft. T = 0.77 min. K(GeometricMean)=2.5x10 cm/sec M = 3.16 D = 0.60 ft. mu Golder HVORSLEV RISING HEAD ANALYSIS els° Associates Denver, Colorado MONITORING WELL GWMW-O6 CUa4T/PROJECT DRAWN DATE MAY 1992 JOB NO. 923-2403 WASTE MANAGEMENT OF COLORADO CNECxtD yA 5CM.E N/A DWC NO./REV. .N0. CENTRAL WELD SANITARY LANDFILL REV,EM,m WTI FILE .NO. FIGURE NO. lJ S3i.n6.; 10 I En .. 1 IC - ' < K, � , • i U Z K:1`T • I i O .] O j __► 1 �] C M. 0.1 lit III -2 12 ' 0.01 , I T, !T' 0 1 2 3 4 5 6 7 8 TIME(MINUTES) K` (0.17 ft)21n[2(3.16)(10.0 ft)] _ 0.60 ft S.W.L. = 6.45 ft. K1 8(10.0 ft)(2.76 min) B.O.S. = 23.0 ft. doff = 0.17 ft. L = 10.0 ft. K1=3.10x104 cm/sec T = 2.76 min. M = 3.16 D = 0.60 ft. (0.17 ft)21n[2(3.16)(10.0 ft)] _ 0.60 ft K2 8(10.0 ft)(3.41 min) S.W.L. = 6.45 ft. B.O.S. = 23.0 ft. K2=2.51x1O-4 cm/sec deff = 0.17 1 L = 10.0 ft. T = 3.41 min. K(GeometricMean)=2.79x10 cm/sec M = 3.16 D = 0.60 ft. OGolder HVORSLEV RISING HEAD ANALYSIS n ssoc5afes Denver, Colorado MONITORING WELL GWMW-07 CUFM/PROJECT DRAWN DATE MAY 1992 J08 NO. 923-2403 WASTE MANAGEMENT OF COLORADO CHECKED y SCALE N/A DWG NO./REV. NO. CENTRAL WELD SANITARY LANDFILL REVIEWED mai FILE NO. FIGURE NO. H-8 K, a a K,- ¢1 U U 0.1 o d -J a a O : a a a 'r Z •(— T, '•" 4." '�---- T: i 0.01 0 5 10 15 20 25 TIME (MINUTES) K` (0.17 ft)21n[2(3.16)(10.0 ft)) 0.67 ft _ S.W.L. = 43.35 ft. �' 8(10.0 ft)(3.77 min) B.O.S. = 80.00 ft. dar = 0.17 ft. L = 10.00 ft. %1=2,21x10 ° cm/sec T = 3.77 min. M = 3.16 D = 0.67 ft. (0.17 ft)21n[2(3.16)(10.0 ft)] K2 K2= 0.67 ft 8(10.0 ft)(6.77 min) S.W.L. = 43.35 ft. B.O.S. = 80.00 ft. K2=6.25x10-5 cm/sec defy = 0.17 ft. L = 10.00 ft. T = 6.77 min. K(GeometricMean)=1.15x10-` cm/sec M = 3.16 D = 0.67 ft. �oliGolder HVORSLEV RISING HEAD ANALYSIS o Associates Denver, Colorado MONITORING WELL GWMW-O8 CUENr/PROJECT DRAWN DATE MAY 1992 .oe No. 923-2403 WASTE MANAGEMENT OF COLORADO CNECKID JAC SCALE N/A DWC NO./Aft. NO. CENTRAL WELD SANITARY LANDFILL REVIEWED mai FlSE 40. i ,CURE ..5o. H-9 10_ , I U c r U I a C 1 4^C Z leins 0.1 I it -0--- - T - • • 0 10 20 30 40 50 60 TIME(MINUTES) S.W.L. = 59.69 ft. (0.17 ft)2in[2(3.16)(10.0 ft)] B.O.S. = 75.00 ft. 0.469 ft K_ doff = 0.17 ft. 8(10.0 ft)(18.46 min) . L = 10.00 ft. T = 18.46 min. M = 3.16 D = 0.469 ft. K=4.87x10_3 an/sec mtE OGolder HVORSLEV RISING HEAD ANALYSIS n �.�.^ {� MONITORING WELL GWMW-09 ...Associates Denver, Colorado . CUENT/PROJECT DRAWN DATE 'NAY 1992 J08 NO. 92 -2403 WASTE MANAGEMENT OF COLORADO CHECKED JAC SCALE N/A DWc No.iREv. NO. CENTRAL WELD SANITARY LANDFILL Ream FILE N0. 'FIGURE 40. H-10 931.03* 10 , E co cn o r c..) K'� O Q Ka-. IFA i o E-- c d I I z 0.1 , I -tI TI \ I I 0 5 10 15 2 25 30 TIME(MIND' .S) I T' --' KT (0.17 ft)ZIn[2(3.16)(10.0 ft)] _ 0.67 ft S.W.L. = 47.66 ft. c8(10.0 ft)(9.23 min) B.O.S. = 60.00 ft. deer = 0.17 ft. L = 10.00 ft. K1=9.04x10-5 cm/sec T = 9.23 min. M = 3.16 D = 0.67 ft. (0.17 ft)2in[2(3.16)(10.0 ft)] 0.67 ft _ K2 8(10.0 ft)(14.23 min) S.W.L. = 47.66 ft. K2=5.79x10-5 cm/sec B.O.S. = 60.00 ft. deer = 0.17 ft. L = 10.00 ft. T = 14.42 min. K(GeometricMean)=7.23x10-5 cm/sec M = 116 D = 0.67 ft. TITLE °Golder HVORSLEV RISING HEAD ANALYSIS MONITORING WELL GWMW-1O ©Associates Denver, Colorado CLIENT/PROJECT DRAWN DATE MAY 1992 hoe N0. 923-2403 WASTE MANAGEMENT OF COLORADO CNECXED JAG SCMX N/A h NO./Re/. No. CENTRAL WELD SANITARY LANDFILL REVIEWED WF7i FILE n0. IfGURE NO. LJ—'1 gains. 10 I I I i I I I E O D >. Q CD 1 0 C a I i I i I I I I I Z H1 I T I I I I I I I 0.1 , I ! I I I I I I 0 10 20 30 40 50 60 70 80 90 TIME(MINUTES) S.W.L. = 15.20 ft. (0.17 ft)zln[2(3.16)(10.0 ft)] B.O.S. = 60.00 ft. 0.67 ft _ doff = 0.17 ft. 8(10.0 6)(79.77 min) L = 10.0 ft. T = 79.77 min. M = 3.16 D = 0.67 ft. K=1.05x10'5 cm/sec TOLE OGolder HVORSLEV RISING HEAD ANALYSIS n, ssociates Denver, Colorado MONITORING WELL GWMW-11 CLIENT/PROJECT DRAWN DATE MAY 1992 JOB NO. 923-2403 WASTE MANAGEMENT OF COLORADO ciEcxEO jAc SCALE N/A OWO NO./REV. NO. CENTRAL WELD SANITARY LANDFILL REVIEWED wEi FILE NO. MORE NO. H-12 831061 . 10 I i r en a .. U >- U c7 O T .1 , - o �� — 2 W E-, z TI I I 0.1 P 20 40 60 80 100 120 TIME(MINUTES) S.W.L. = 30.92 ft. (0.17 ft)2inr2(3.16)(10.0 ft)] B.O.S. = 68.00 ft. 0.469 ft dd( = 0.17 ft. %_ 8(10.0 L = 10.00 ft. ft)(128.12 min) T = 128.125 min. M = 3.16 D = 0.469 ft. K=7.02x10-6 cm/sec TMX Golder HVORSLEV RISING HEAD ANALYSIS �G'Associates Denver, Colorado MONITORING WELL GWMW-12 CUEM/PROJECT DRAWN DATE MAY 1992 JC9 NO. 923-2403 WASTE MANAGEMENT OF COLORADO CHECKED 3AC SCALE N/A DWG ND./REV. NO. CENTRAL WELD SANITARY LANDFILL REVIEWED we., FILE NO. FlCJRE NO. H-13 ' S2106•I 10 , E Ti C o r ¢ C m a 1 _ I o ¢ -. 0 c7 a w _ E . , I ¢ I I z -(---T ■ 0.1 I 1 I 0 50 100 150 200 250 TIME(MINUTES) S.W.L. = 4.52 ft. (0.17 ft)2in[2(3.16)(10.0 ft)] B.O.S. = 60.00 ft. 0.688 ft ,r d� = 0.17 ft. K_ 8(10.0 ft)(61.29 min) L = 10.00ft. T = 61.29 min. M = 3.16 D = 0.688 ft. K=1.35x10_5 cm/sec rmE Golder HVORSLEV RISING HEAD ANALYSIS MONITORING WELL GWMW-13 re ssocateS Denver, Colorado CUENT/PROJECT DRAWN DATE MAY 1992 408 NO. 923.2403 WASTE MANAGEMENT OF COLORADO CHECXED JAG sexE N/A OWG NO./REV. NO. CENTRAL WELD SANITARY LANDFILL RenEwm wEH FILE NO. FIGURE NO. H 1A Rif iO6 10 , I E m ci < U = O tillib--s--4,.. .4 -J c m I I , Q z I T \ I • 0.1 I 0 20 40 60 80 1 120 140 TIME (MINUTES) S.W.L. = 7.35 ft. (0.17 R)2b(2(3.16)(10.0 ft)) B.O.S. = 60.00 ft. 0.688 ft K_ d<ff = 0.17 ft. 8(10.0 ft)(41.64 min) L = 10.00 ft. T = 41.64 min. M = 3.16 D = 0.688 ft. K=1.99x10"5 cm/sec TITLE HVORSLEV RISING HEAD ANALYSIS MONITORING WELL GWMW-14 S alGolder Associates Denver, Colorado CLAW/PROJECT DRAWN ATE MAY 1992 Oa NO. 923-2403 WASTE MANAGEMENT OF COLORADO n+ErxEo yc SCALE N/A OWC NO./REV. NO. CENTRAL WELD SANITARY LANDFILL RENAE'MED WE1 IFll£ NO. .01CJRE NO. H-15 92106 ' `°wwf" -Ats.M,.RµPMt ..,.•31”74 anY 'e e ry -'gr'.,T"`4 44i,K M^ylvt�T Ssw-4 i$ ,ka�'!�i'".t7"ra745,'ls.,''.t-rc )1...'tF�! +, .r �,f?ittt'4 L ,,, +;. F cep x t r t ..' „k�'�+ —t.��`+. „`+ a{4 r :F .z Ica' rrr \', .stii `t. '" � y. $j ��,M& a+. + zr s L' 1 x .+ SAs��__ll `Y 3.(' y t .X3 5y,t'F1'7 S.k �T^e 7;4:" jA` xpijt 4 F J K dA l' 3sru.,,y -qs'7y�n .a..g' i 3 ₹r v' 'r tr f�` {-a .:.r ,°: .'w" tr APS ",' -' k „ b' z 3 k- "P ,' , S'Z'."'' ' iir #silii'r'y�;{•4«*`iF,\9,, 6'1441J.^'.°+' 'aria 4.43 440.40,,Pr;.fi apat:la..k4, #o ,aw i«'a" -.tixa..au""M,}.• .,4tc t'rSHo'AFt -.'• o. t'a,f ,sA'.}i,rna.... :. - ' 4 w e/•G' �iy "'" �.Y�' ,,,,,$:as#'k$,.ti.-",,, tr.,•t e n,�;% tr«,¢ . & .w*.'s C rta4•,,. -471Ma . .t4Y"•:• +vtF' ry �T, " n.Z2 '* ! : ,5 +55 TM-4 f. +F'1.-tti e s ✓f1"p ff.s -"4a Kh, %' h'',c Aa "t '' ' 5. 5 ^"';'. u ,. 4 :-' . p .J Y,. ;',,,,7‘../214* i'r • , .3"Y M,ha:.k °1.. s ' t. •. '. a ;... - r :.. {♦ d n 1 ' ) a x t Y*k a'p'l�A'w� T?R."e'esR .�#i:f�+,2.s1••.a's>.w a s...w w�¢�, arc a "�,41"-:4 14,44;4,, K,&n.cna 'c.. .3+b i,eAkh44••eirn. p.. i a ty-u14io- •-' midi?okaix tiq. 'y At C p"ITOO M�'O4c7 b 74* "44Ar'!'t N',5.: a! !y'.!*�{Y �. , , -1 SFp �`� it.i„ 4 d' '1' - ) r7. '� v r:: a 3 v 7t.ra Y.tik +AVE s F..r, "ff+4 -. tT n $Lw)�.. r r..s4. ^fi t r r4'' t `! x '+' "'ysi` 1 ?'-€. •-e", r2It•!m'+� - "..r T�'.4 "i ✓' fib,. a 472,7" "° ":74t+�t. .L s ,�sl ;x '^"`.. P^rw}' ry ws 1 i �: z .,,+ r.':+ wi�` e.4. S µ � � . }- "Z• �,^'} a 3f°^'r 't'3 ':a �' tf�� 5m e+ f }4 Y f F. Y` �n �' • a ..` �` `ti`" ''i;•. aS --'nii e, *'.7°' t-r ,"ssF'att f ..rr{,;r� Pys r^- „er • fAs^ .g. tC .:rd «, qz 4Go m� 4';n1,3+a,'L' �sa•�,m' Tt +'x4 n.wp1"f* '�'-�:to arE•�*!'aY �w x rc�5 a- an.,-' it a t ,r ,t ! sr.y4 +, „� -77.4 t ', .,arc '77-;:e3:0,:'„ �.'' }tN w� ..tk. v-Ti J ----'55,-•$••=e-",450 .,r _''vr .:r yK., ttr9A^z<.iLk,-YS_.1' `a.+ - ,-H._+•r a,w, w�•ak'.:54>-57-4‘'-'‘',5 :}:4.,Lek Ns.fe "k pis+ 'de- .+¢P,ict aaL.er:1:; r+'V9 'irfh ° A r t i- Yit t ' t +rs "s"rs F .fsnr,, .7 -4..4, ' t r s ,,ya a -..rzta' n xP"l. Sax t sy^„e �C ".t'— 53,. .r'ty a"'Y,y, „'}.4'.'t � is.9.. Yr ?`tsS..,.h. >.r« e : ° �„ G . r r , r-, . . . . ac:'' r '.;` £ �R v9"� .,•"kn� ^ tte-,. 2. lit v^ t - ; „ '4t 1.,- 4 t- C --v..c. 9a^,As'4• .^�.s. ° �'R�.";�'I,..' "i,,..r,•,'-,�"e;3'1' • i"''..s a-•r'xk' w +�+iyst�•at �dFt. +a.•:. a ,.> j n l'-• y �Nr +. s ,� f t tx`.' 4?.-7.r.y `*,• -.i.fik ' vpg, ,"S' t >=b. ,� �<"p1 t Ot '` qa ' e elO4r'� x t '.4r14'744 "-fry° t v"-:4Y';- )t454: Y E"£. ."J' an .4 + 4...,:p. .t f''h . 'a L,- 1,4*' i 4A tis y4�z} ,Ft ,tiF 3\4 r yz..,". wq Ia ..k‘..1,,:',;;;; k iy ',-.i .A.5247.^4 i- ti _..Yi 2 r .a i E +5w s t tl ey. t 4r ,, 9 1 `4ti, eZ ti ,, Ry re "ii,r: 'i.Y' { tot , ! y .rF {�' ..:" s > .5b,�-1}"t•0.�S S �.1` 4Y r qtr.fs'r W3/ J,;-. cit '� , .t:tra• ."t'i , !.r XF i`d a !.rr m 5 r f ,,;;;;.;".y , .5' s • ,L4' 4r H�; 3.-„ zi r a `?; .uv4.."-V.,,-4a,� vx . s— o. s n P e ; s t �4 ik 1', , M tir�,i't a fc 3 ! It;;'4J„ a.. a ,eC z iri9rr .�o �'.` a .i N:... �4a"°R �nR at .... "� ty !,_ Z * 4 rtt ts. e.c*. -f vim. �Er'ieT.: raex ea* W: L'^. ti,,,j,...",t r t eF c *"�},j 'fie J R} 04 s v- r f s°— ,Fy�`^�7��t--„ �., : {,� !,(y�yF�; illi�lllrJ�wk4,7t� d��.T�14' n SlXrjt +�5 .� L 9 b ��-0 T�+�dr ��'L T �T � � lnq��`L tl Y.r } R. F Lf.�fVqry ..'.07'4-- > 45-154-, t e < { r p k . t . 4 "'V O„,, '?.YP Ct... .. pe `y c r '"L » „t ,':'+_k r t t , , st t a t 'd £ �'$�,..ti t1Q 13' SKr. k t � j4 t- f t -4 .44,-,e.'4,..m..7: 4%+ �"'n42 yr a r ?:14t. - '.x 1. 'Ti� F .F r� r ,.$ '.,. 4,v 4atO:4:taA 444,i° a -.,/L �arr.K v`,+''7...f • 1{ t '-.^ y xf,21p Y?{ Z.. f.t. ' "Y i ,itX 1. rycya { _tc• JSry i S F tiff .y rF j '"' ,r•4 r .1' r ttkt.5e�c .� '4".Aw" ,r* Golder Associates �.4 �} , ;`k.,' ft. .r ! h3' L . Yt•la".h t,4.,,±:, "F F.eeyv ai-,7 ,? > +'. 3 - - a 2yr-d`',':! • Yt5Y;-.5"5*'1frk.T ,,'" ^`ts* lw• °,-Lt.' G r'.'vt..' `, Enseco Volatile Organics A Comm!Company Target Compound List (TCL) Method 8240 Client Name: Waste Management of North America, Inc. Client ID: GWMW1 Lab ID: 021837-0001-SA Matrix: AQUEOUS Sampled: 27 MAR 92 Received: 28 MAR 92 Authorized: 28 MAR 92 Prepared: 31 MAR 92 Analyzed: 08 APR 92 Reporting Parameter Result Units Limit Acetone ND ug/L 10 Benzene ND ug/L 5.0 Bromodichioromethane ND ug/L 5.0 Bromoform ND ug/L 5.0 Bromomethane ND ug/L 10 2-Butanone (MEK) ND ug/L 10 Carbon disulfide ND ug/L 5.0 Carbon tetrachloride ND ug/L 5.0 Chlorobenzene ND ug/L 5.0 Chioroethane ND ug/L 10 Chloroform ND ug/L 5.0 Chloromethane ND ug/L 10 Dibromochloromethane ND ug/L 5.0 1,1-Dichloroethane ND ug/L 5.0 1,2-Dichloroethane ND ug/L 5.0 1 , 1-Dichloroethene ND ug/L 5.0 1,2-Dichloroethene (total ) ND ug/L 5.0 1,2-Dichloropropane ND ug/L 5.0 cis-1,3-Dichloropropene ND ug/L 5.0 trans-1,3-Dichloropropene ND ug/L 5.0 Ethyl benzene ND ug/L 5.0 2-Hexanone ND ug/L 10 Methylene chloride ND ug/L 5.0 4-Methyl -2-pentanone (MIBK) ND ug/L 10 Styrene ND ug/L 5.0 1,1,2,2-Tetrachloroethane NO ug/L 5.0 Tetrachloroethene ND ug/L 5.0 Toluene ND ug/L 5.0 1,1, 1-Trichloroethane ND ug/L 5.0 1,1,2-Trichloroethane ND ug/L 5.0 Trichloroethene ND ug/L 5.0 Vinyl acetate NO ug/L 10 Vinyl chloride ND ug/L 10 Xylenes (total ) ND ug/L 5.0 Surrogate Recovery Toluene-d8 103 % 4-Bromofluorobenzene 97 % (continued on following page) ND = Not detected NA = Not applicable Reported By: Michael Blades Approved By: Karen Kuiken Ensec Volatile Organics Aram�nW Target Compound List (TCL) Method 8240 Client Name: Waste Management of North America, Inc. Client ID: GWMW1 Lab ID: 021837-0001-SA Matrix: AQUEOUS Sampled: 27 MAR 92 Received: 28 MAR 92 Authorized: 28 MAR 92 Prepared: 31 MAR 92 Analyzed: 08 APR 92 Surrogate Recovery 1,2-Dichloroethane-d4 93 ND = Not detected NA = Not applicable Reported By: Michael Blades Approved.By: Karen Kuiken :�:_JJ.nd3�. Ensec Chlorinated Pesticides and PCB's Acme• Target Compound List (TCL) Method 8080 Client Name: Waste Management of North America, Inc. Client ID: GWMW1 Lab ID: 021837-0001-SA Matrix: AQUEOUS Sampled: 27 MAR 92 Received: 28 MAR 92 Authorized: 28 MAR 92 Prepared: 31 MAR 92 Analyzed: 08 APR 92 Reporting Parameter Result Units Limit gamma-BHC (Lindane) ND ug/L 0.050 Endrin ND ug/L 0.10 Methoxychlor ND ug/L 0.50 Toxaphene ND ug/L 5.0 Surrogate Recovery Dibutyl chlorendate 53 9: NO = Not detected NA = Not applicable Reported By: Lue Lor Approved By: Karen Kuiken 93106:"... W Enseco RCRA Herbicides ACumin4Cameanv Method 8150 Client Name: Waste Management of North America, Inc. Client ID: GWMW-1 Lab ID: 022450-0001-SA Matrix: AQUEOUS Sampled: 27 APR 92 Received: 29 APR 92 Authorized: 29 APR 92 Prepared: 01 MAY 92 Analyzed: 08 MAY 92 Reporting Parameter Result Units Limit 2,4-0 ND ug/t. 12 2,4,5-TP (Silvex) ND ug/L 1.7 Surrogate Recovery DCAA 90 ND = Not detected NA = Not applicable Reported By: Susan McCool Approved. By: Karen Kuiken Enss C.co Metal Dissolved Metals Client Name: Waste Management of North America, Inc. Client ID: GWMW1 Lab ID: 021837-0001-SA Matrix: AQUEOUS Sampled: 27 MAR 92 Received: 28 MAR 92 Authorized: 28 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Arsenic ND mg/L 0.010 7060 NA 06 APR 92 Barium ND mg/L 0.010 6010 NA 02 APR 92 Cadmium ND mg/L 0.0050 6010 NA 02 APR 92 Calcium 471 mg/L 0.20 6010 NA 02 APR 92 Chromium ND mg/L 0.010 6010 NA 02 APR 92 Iron ND mg/L 0.10 6010 NA 02 APR 92 Lead ND mg/L 0.010 7421 NA 06 APR 92 Magnesium 244 mg/L 0.20 6010 NA 02 APR 92 Manganese ND mg/L 0.010 6010 NA 02 APR 92 Mercury ND mg/L 0.00020 7470 30 MAR 92 31 MAR 92 Potassium ND mg/L 5.0 6010 NA 02 APR 92 Selenium ND mg/L 0.050 7740 NA 08 APR 92 Silver ND mg/L 0.010 6010 NA 02 APR 92 Sodium 77.9 mg/L 5.0 6010 NA 02 APR 92 ND - Not detected NA .. Not applicable Reported By: Sandra Jones Approved..By: Sandra Jones 82106 F General Inorganics CO Client Name: Waste Management of North America, Inc. Client ID: GWMW1 Lab ID: 021837-0001-SA Matrix: AQUEOUS Sampled: 27 MAR 92 Received: 28 MAR 92 Authorized: 28 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Alkalinity, Bicarb. as CaCO3 at pH 4.5 419 mg/L 5.0 310.1 NA 28 MAR 92 Alkalinity, Garb. as CaCO3 at pH 8.3 ND mg/L 5.0 310.1 NA 28 MAR 92 Chloride 15. 1 mg/L 3.0 300.0 NA 28 MAR 92 Ammonia as N ND mg/L 0.10 350.1 NA 30 MAR 92 Nitrate as N 4.7 mg/L 0.10 300.0 NA 28 MAR 92 Sulfate 1980 mg/L 25.0 300.0 NA 28 MAR 92 NO = Not detected NA = Not applicable Reported By: Steve Pope Approved By: Blake Besser 93106 Enseco Radiochemistry A Coming Company Client Name: Waste Management of North America, Inc. Client ID: GWMW1 Lab ID: 021837-0001-SA Matrix: AQUEOUS Sampled: 27 MAR 92 Received: 28 MAR 92 Authorized: 28 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Gross Alpha 67 pCi/L +-28) 900.0 NA 14 APR 92 Radium 226 2.0 pCi/L +-1.0) 705 Modified NA 14 APR 92 Gross Beta 50 pCi/L +-21) 900.0 NA 14 APR 92 Radium 228 1.9 pCi/L +-1.2) EPA Specified NA 16 APR 92 ND = Not detected NA = Not applicable Reported By: Ramona Power Approved.By: Roxanne Sullivan i3io6 AeC� Enseco Organics Commis Company Target Compound List (TCL) Method 8240 Client Name: Waste Management of North America, Inc. Client ID: GWMW2 Lab ID: 021837-0002-SA Matrix: AQUEOUS Sampled: 27 MAR 92 Received: 28 MAR 92 Authorized: 28 MAR 92 Prepared: 31 MAR 92 Analyzed: 09 APR 92 Reporting Parameter Result Units Limit Acetone 34 ug/L 10 Benzene ND ug/L 5.0 Bromodichloromethane ND ug/L 5.0 Bromoform ND ug/L 5.0 Bromomethane ND ug/L 10 2-Butanone (MEK) ND ug/L 10 Carbon disulfide ND ug/L 5.0 Carbon tetrachloride ND ug/L 5.0 Chlorobenzene ND ug/L 5.0 Chloroethane ND ug/L 10 Chloroform ND ug/L 5.0 Chloromethane ND ug/L 10 Dibromochloromethane ND ug/L 5.0 1,1-Dichloroethane ND ug/L 5.0 1,2-Dichloroethane NO ug/L 5.0 1, 1-Dichloroethene ND ug/L 5.0 1,2-Dichloroethene (total ) ND ug/L 5.0 1,2-Dichloropropane ND ug/L 5.0 cis-1,3-Dichloropropene ND ug/L 5.0 trans-1,3-Dichloropropene ND ug/L 5.0 Ethyl benzene ND ug/L 5.0 2-Hexanone ND ug/L 10 Methylene chloride ND ug/L 5.0 4-Methyl -2-pentanone (MIBK) ND ug/L 10 Styrene ND ug/L 5.0 1 , 1,2,2-Tetrachloroethane ND ug/L 5.0 Tetrachloroethene ND ug/L 5.0 Toluene ND ug/L 5.0 1, 1, 1-Trichloroethane ND ug/L 5.0 1, 1,2-Trichloroethane ND ug/L 5.0 Trichloroethene . ND ug/L 5.0 Vinyl acetate ND ug/L 10 Vinyl chloride ND ug/L 10 Xylenes (total ) ND ug/L 5.0 Surrogate Recovery Toluene-d8 105 r. 4-Bromofluorobenzene 98 7. (continued on following page) I ND = Not detected NA = Not applicable Reported By: Stephanie Boehnke Approved By: Karen Kuiken 93106•, Volatile Organics AComingCompany Target Compound List (TCL) Method 8240 Client Name: Waste Management of North America, Inc. Client ID: GWMW2 Lab ID: 021837-0002-SA Matrix: AQUEOUS Sampled: 27 MAR 92 Received: 28 MAR 92 Authorized: 28 MAR 92 Prepared: 31 MAR 92 Analyzed: 09 APR 92 Surrogate Recovery 1,2-Dichloroethane-d4 104 • • • • ND = Not detected NA = Not applicable Reported By: Stephanie Boehnke Approved By: Karen Kuiken R3106". Enseco Chlorinated Pesticides and PCB's A Coming Cumpanv Target Compound List (TCL) Method 8080 Client Name: Waste Management of North America, Inc. Client ID: GWMW2 Lab ID: 021837-0002-SA Matrix: AQUEOUS Sampled: 27 MAR 92 Received: 28 MAR 92 Authorized: 28 MAR 92 Prepared: 31 MAR 92 Analyzed: 08 APR 92 Reporting Parameter Result Units Limit gamma-BHC (Lindane) ND ug/L 0.050 Endrin ND ug/L 0.10 Methoxychlor ND ug/L 0.50 Toxaphene ND ug/L 5.0 Surrogate Recovery Dibutyl chlorendate 42 ND = Not detected NA = Not applicable Reported By: Lue Lor Approved By: Karen Kuiken 3106: Erl_seco RCRA Herbicides A Corning Cumoanv Method 8150 Client Name: Waste Management of North America, Inc. Client ID: GWMW-2 Lab ID: 022450-0002-SA Matrix: AQUEOUS Sampled: 27 APR 92 Received: 29 APR 92 Authorized: 29 APR 92 Prepared: 01 MAY 92 Analyzed: 08 MAY 92 Reporting Parameter Result Units Limit 2,4-0 ND ug/L 12 2,4,5-TP (Silvex) ND ug/L 1.7 Surrogate Recovery DCAA 90 ND - Not detected NA - Not applicable Reported By: Susan McCool Approved By: Karen Kuiken 97,1061. C�co MetalsEn Dissolved Metals Client Name: Waste Management of North America, Inc. Client ID: GWMW2 Lab ID: 021837-0002-SA Matrix: AQUEOUS Sampled: 27 MAR 92 Received: 28 MAR 92 Authorized: 28 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Arsenic ND mg/L 0.010 7060 NA 06 APR 92 Barium 0.043 mg/L 0.010 6010 NA 02 APR 92 Cadmium ND mg/L 0.0050 6010 NA 02 APR 92 Calcium 469 mg/L 0.20 6010 NA 02 APR 92 Chromium ND mg/L 0.010 6010 NA 02 APR 92 Iron NO mg/L 0.10 6010 NA 02 APR 92 Lead ND mg/L 0.050 7421 NA 06 APR 92 Magnesium 169 mg/L 0.20 6010 NA 02 APR 92 Manganese ND mg/L 0.010 6010 NA 02 APR 92 Mercury ND mg/L 0.00020 7470 30 MAR 92 31 MAR 92 Potassium ND mg/L 5.0 6010 NA 02 APR 92 Selenium ND mg/L 0.050 7740 NA 08 APR 92 Silver ND mg/L 0.010 6010 NA 02 APR 92 Sodium 124 mg/L 5.0 6010 NA 02 APR 92 • ND = Not detected NA - Not applicable Reported By: Sandra Jones Approved_By: Sandra Jones 921.n&a nseco General Inorganics A C�g Company Client Name: Waste Management of North America, Inc. Client ID: GWMW2 Lab ID: 021837-0002-SA Matrix:. AQUEOUS Sampled: 27 MAR 92 Received: 28 MAR 92 Authorized: 28 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Alkalinity, Bicarb. as CaCO3 at pH 4.5 357 mg/L 5.0 310.1 NA 28 MAR 92 Alkalinity, Carb. as CaCO3 at pH 8.3 ND mg/L 5.0 310.1 NA 28 MAR 92 Chloride 30.6 mg/L 3.0 300.0 NA 28 MAR 92 Ammonia as N ND mg/L 0.10 350.1 NA 30 MAR 92 Nitrate as N 18.5 mg/L 0.10 300.0 NA 28 MAR 92 Sulfate 1580 mg/L 25.0 300.0 NA 28 MAR 92 ND = Not detected NA = Not applicable Reported By: Steve Pope Approved. By: Blake Besser fi 21.06:'! Enseco Radiochemistry A Comm;Company Client Name: Waste Management of North America, Inc. Client ID: GWMW2 Lab ID: 021837-0002-SA Matrix: AQUEOUS Sampled: 27 MAR 92 Received: 28 MAR 92 ' Authorized: 28 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Gross Alpha 56 pCi/L (+-27) 900.0 NA 14 APR 92 Radium 226 0.9 pCi/L (((+-0.7) 705 Modified NA 14 APR 92 Gross Beta 38 pCi/L +-22) 900.0 NA 14 APR 92 Radium 228 1 .7 pCi/L +-1.3) EPA Specified NA 16 APR 92 ND = Not detected NA = Not applicable Reported By: Ramona Power Approved. By: Roxanne Sullivan 231064 r - 1Seco Volatile Organics Target Compound List (TCL) Method 8240 Client Name: Waste Management of North America, Inc. Client ID: GWMW3 Lab ID: 021782-0001-SA Matrix: AQUEOUS Sampled: 25 MAR 92 Received: 25 MAR 92 Authorized: 25 MAR 92 Prepared: 26 MAR 92 Analyzed: 06 APR 92 Reporting Parameter Result Units Limit Acetone ND ug/L 10 Benzene ND ug/L 5.0 Bromodichioromethane ND ug/L 5.0 Bromoform ND ug/L 5.0 Bromomethane ND ug/L 10 2-Butanone (MEK) ND ug/L 10 Carbon disulfide ND ug/L 5.0 Carbon tetrachloride ND ug/L 5.0 Chlorobenzene ND ug/L 5.0 Chloroethane ND ug/L 10 Chloroform ND ug/L 5.0 Chloromethane ND ug/L 10 Dibromochloromethane ND ug/L 5.0 1, 1-Dichloroethane ND ug/L 5.0 1,2-Dichloroethane ND ug/L 5.0 1,1-Dichioroethene ND ug/L 5.0 1,2-Dichloroethene (total ) ND ug/L 5.0 1,2-Dichloropropane ND ug/L 5.0 cis-1,3-Dichloropropene ND ug/L 5.0 trans-1,3-Dichloropropene ND ug/L 5.0 Ethylbenzene ND ug/L 5.0 2-Hexanone ND ug/L 10 Methylene chloride ND ug/L 5.0 4-Methyl -2-pentanone (MIBK) ND ug/L 10 Styrene ND ug/L 5.0 1, 1 ,2,2-Tetrachloroethane ND ug/L 5.0 Tetrachloroethene ND ug/L 5.0 Toluene ND ug/L 5.0 1,1,1-Trichloroethane ND ug/L 5.0 1,1,2-Trichloroethane ND ug/L 5.0 Trichioroethene ND ug/L 5.0 Vinyl acetate ND ug/L 10 Vinyl chloride ND ug/L 10 Xylenes (total ) ND ug/L 5.0 Surrogate Recovery Toluene-dB 100 % 4-Bromofluorobenzene 93 % (continued on following page) ND = Not detected NA = Not applicable Reported By: Scott McPhail Approved By: Karen Kuiken Enseco Volatile Organics Target Compound List (TCL) Method 8240 Client Name: Waste Management of North America, Inc. Client ID: GWMW3 Lab ID: 021782-0001-SA Matrix: AQUEOUS Sampled: 25 MAR 92 Received: 25 MAR 92 Authorized: 25 MAR 92 Prepared: 26 MAR 92 Analyzed: 06 APR 92 Surrogate Recovery 1,2-Dichloroethane-d4 88 % ND - Not detected NA - Not applicable Reported By: Scott McPhail Approved By: Karen Kuiken 2310,€.. Enseco Chlorinated Pesticides and PCB's Target Compound List (TCL) Method 8080 Client Name: Waste Management of North America, Inc. Client ID: GWMW3 Lab ID: 021782-0001-SA Matrix: AQUEOUS Sampled: 25 MAR 92 Received: 25 MAR 92 Authorized: 25 MAR 92 Prepared: 31 MAR 92 Analyzed: 07 APR 92 Reporting Parameter Result Units Limit gamma-BHC (Lindane) ND ug/L 0.050 Endrin ND ug/L 0.10 Methoxychlor ND ug/L 0.50 Toxaphene ND ug/L 5.0 Surrogate Recovery Dibutyl chlorendate 75 7. ND - Not detected NA a Not applicable Reported By: Lue Lor Approved By: Karen Kuiken 06t. Enseco RCRA Herbicides Method 8150 Client Name: Waste Management of North America, Inc. Client ID: GWMW3 Lab ID: 021782-0001-SA Matrix: AQUEOUS Sampled: 25 MAR 92 Received: 25 MAR 92 Authorized: 25 MAR 92 Prepared: 30 MAR 92 Analyzed: 13 APR 92 Reporting Parameter Result Units Limit 2,4-D ND ug/L 12 2,4,5-TP (Silvex) ND ug/L 1.7 Surrogate Recovery DCAA 66 NO Not detected NA = Not applicable Reported By: Lue Lor Approved By: Karen Kuiken .4131064 Metals �eco Dissolved Metals Client Name: Waste Management of North America, Inc. Client ID: GWMW3 Lab ID: 021782-0001-SA Matrix: AQUEOUS Sampled: 25 MAR 92 Received: 25 MAR 92 Authorized: 25 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Arsenic ND mg/L 0.010 7060 NA 06 APR 92 Barium NO mg/L 0.010 6010 NA 02 APR 92 Cadmium ND mg/L 0.0050 6010 NA 02 APR 92 Calcium 437 mg/L 0.20 6010 NA 02 APR 92 Chromium ND mg/L 0.010 6010 NA 02 APR 92 Iron ND mg/L 0.10 6010 NA 02 APR 92 Lead ND mg/L 0.010 7421 NA 06 APR 92 Magnesium 451 mg/L 0.20 6010 NA 02 APR 92 Manganese ND mg/L 0.010 6010 NA 02 APR 92 Mercury ND mg/L 0.00020 7470 30 MAR 92 31 MAR 92 Potassium 11 .4 mg/L 5.0 6010 NA 02 APR 92 Selenium ND mg/L 0.050 7740 NA 08 APR 92 Silver ND mg/L 0.010 6010 NA 02 APR 92 Sodium 266 mg/L 5.0 6010 NA 02 APR 92 ND a Not detected NA - Not applicable Reported By: Sandra Jones Approved By: Sandra Jones 931 OW. General Inorganics AAC Coming C� Client Name: Waste Management of North America, Inc. Client ID: GWMW3 Lab ID: 021782-0001-SA Matrix: AQUEOUS Sampled: 25 MAR 92 Received: 25 MAR 92 Authorized: 25 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Alkalinity, Bicarb. as CaCO3 at pH 4.5 213 mg/L 5.0 310.1 NA 26 MAR 92 Alkalinity, Carb. as CaC03 at pH 8.3 ND mg/L 5.0 310.1 NA 26 MAR 92 Chloride 71.0 mg/L 3.0 300.0 NA 26 MAR 92 Ammonia as N ND mg/L 0.10 350.1 NA 30 MAR 92 Nitrate as N 8.1 mg/L 0.10 300.0 NA 26 MAR 92 Sulfate 3270 mg/L 50.0 300.0 NA 26 MAR 92 ND = Not detected NA = Not applicable Reported By: Steve Pope Approved By: Blake Sesser Enseco Radiochemistry A Coming Company Client Name: Waste Management of North America, Inc. Client ID: GWMW3 Lab ID: 021782-0001-SA Matrix: AQUEOUS Sampled: 25 MAR 92 Received: 25 MAR 92 Authorized: 25 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Gross Alpha 180 pCi/L (+-50) 900.0 NA 07 APR 92 Radium 226 7.0 pCi/L (+2.0) 705 Modified NA 08 APR 92 Gross Beta 47 pCi/L +-32) 900.0 NA 07 APR 92 Radium 228 6.2 pCi/L (+-1 .7) EPA Specified NA 09 APR 92 ND = Not detected NA = Not applicable Reported By: Roxanne Sullivan Approved By: Roxanne Sullivan Enseco Volatile Organics ACor„mscmwny Target Compound List (TCL) Method 8240 Client Name: Waste Management of North America, Inc. Client ID: GWMW4 Lab ID: 021825-0006-SA Matrix: AQUEOUS Sampled: 26 MAR 92 Received: 27 MAR 92 Authorized: 27 MAR 92 Prepared: 31 MAR 92 Analyzed: 06 APR 92 I Reporting Parameter Result Units Limit Acetone ND ug/L 10 Benzene ND ug/L 5.0 Bromodichloromethane ND ug/L 5.0 Bromoform ND ug/L 5.0 Bromomethane ND ug/L 10 2-Butanone (MEK) ND ug/L 10 Carbon disulfide ND ug/L 5.0 Carbon tetrachloride ND ug/L 5.0 Chlorobenzene ND ug/L 5.0 Chloroethane ND ug/L 10 Chloroform ND ug/L 5.0 Chloromethane ND ug/L 10 Dibromochloromethane ND ug/L 5.0 1,1-Dichloroethane ND ug/L 5.0 i 1,2-Dichloroethane 18 ug/L 5.0 1, 1-Dichioroethene ND ug/L 5.0 1,2-Dichioroethene • (total ) ND ug/L 5.0 1,2-Dichloropropane ND ug/L 5.0 • cis-1,3-Dichloropropene NO ug/L 5.0 trans-1,3-Dichloropropene ND ug/L 5.0 1 Ethylbenzene ND ug/L 5.0 2-Hexanone ND ug/L 10 Methylene chloride ND ug/L 5.0 4-Methyl -2-pentanone (MIRK) ND Styrene ND ug/L 5.0 1,1,2,2-Tetrachloroethane ND ug/L 5.0 Tetrachloroethene ND ug/L 5.0 Toluene ND ug/L 5.0 1,1,1-Trichloroethane ND ug/L 5.0 1,1,2-Trichloroethane ND ug/L 5.0 Trichloroethene ND ug/L 5.0 Vinyl acetate ND ug/L 10 Vinyl chloride ND ug/L 10 Xylenes (total ) ND ug/L 5.0 Surrogate Recovery Toluene-d8 98 % 4-Bromofluorobenzene 95 % (continued on following page) ND = Not detected NA = Not applicable • Reported By: Scott McPhail Approved By: Karen Kuiken R:31 064 1 Enseco Volatile Organics A Coming Company Target Compound List (TCL) Method 8240 Client Name: Waste Management of North America, Inc. Client ID: GWMW4 Lab ID: 021825-0006-SA Matrix: AQUEOUS Sampled: 26 MAR 92 Received: 27 MAR 92 Authorized: 27 MAR 92 Prepared: 31 MAR 92 Analyzed: 06 APR 92 Surrogate Recovery 1,2-Dichloroethane-d4 93 ND = Not detected NA = Not applicable Reported By: Scott McPhail Approved—By: Karen Kuiken Ens Chlorinated Pesticides and PCB's eco Target Compound List (TCL) Method 8080 Client Name: Waste Management of North America, Inc. I Client ID: GWMW4 Lab ID: 021825-0006-SA Matrix: AQUEOUS Sampled: 26 MAR 92 Received: 27 MAR 92 Authorized: 27 MAR 92 Prepared: 31 MAR 92 Analyzed: 08 APR 92 Reporting Parameter Result Units Limit gamma-BHC (Lindane) ND ug/L 0.050 Endrin ND ug/L 0.10 Methoxychlor ND ug/L 0.50 Toxaphene ND ug/L 5.0 Surrogate Recovery Dibutyl chlorendate 78 NO = Not detected NA - Not applicable Reported By: Lue Lor Approved By: Karen Kuiken i 064.. Ens RCRA Herbicides KO Method 8150 Client Name: Waste Management of North America, Inc. Client ID: GWMW4 Lab ID: 021825-0006-SA Matrix: AQUEOUS Sampled: 26 MAR 92 Received: 27 MAR 92 Authorized: 27 MAR 92 Prepared: 30 MAR 92 Analyzed: 14 APR 92 Reporting Parameter Result Units Limit 2,4-0 ND ug/L 12 2,4,5-TP (Silvex) ND ug/L 1.7 Surrogate Recovery DCAA 87 r . ND = Not detected NA = Not applicable Reported By: Lue Lor Approved By: Karen Kuiken ` .;1.06'. Enseco Metals A Commy,Cempanv Dissolved Metals Client Name: Waste Management of North America, Inc. Client ID: GWMW4 Lab ID: 021825-0006-SA Matrix:. AQUEOUS Sampled: 26 MAR 92 Received: 27 MAR 92 Authorized: 27 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Arsenic ND mg/L 0.0050 7060 NA 06 APR 92 Barium ND mg/L 0.010 6010 NA 02 APR 92 Cadmium ND mg/L 0.0050 6010 NA 02 APR 92 Calcium 412 mg/L 0.20 6010 NA 02 APR 92 Chromium ND mg/L 0.010 6010 NA 02 APR 92 Iron ND mg/L 0.10 6010 NA 02 APR 92 • Lead ND mg/L 0.010 7421 NA 06 APR 92 Magnesium 502 mg/L 0.20 6010 NA 02 APR 92 Manganese 0.61 mg/L 0.010 6010 NA 02 APR 92 Mercury ND mg/L 0.00020 7470 30 MAR 92 31 MAR 92 Potassium ND mg/L 5.0 6010 NA 02 APR 92 Selenium ND mg/L 0. 10 7740 NA 08 APR 92 Silver ND mg/L 0.010 6010 NA 02 APR 92 Sodium 383 mg/L 5.0 6010 NA 02 APR 92 ND = Not detected NA = Not applicable Reported By: Sandra Jones Approved.By: Will Pratt 831064_ . Ens General InorganicsKo Client Name: Waste Management of North America, Inc. Client ID: GWMW4 Lab ID: 021825-0006-SA Matrix: AQUEOUS Sampled: 26 MAR 92 Received: 27 MAR 92 Authorized: 27 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Alkalinity, Bicarb. as CaCO3 at pH 4.5 490 mg/L 5.0 310.1 NA 27 MAR 92 Alkalinity, Carb. as CaCO3 at pH 8.3 ND mg/L 5.0 310.1 NA 27 MAR 92 Chloride 69.1 mg/L 6.0 300.0 NA 27 MAR 92 Ammonia as N ND mg/L 0.10 350.1 NA 30 MAR 92 Nitrate as N 0.11 mg/L 0.10 300.0 NA 27 MAR 92 Sulfate 4340 mg/L 50.0 300.0 NA 27 MAR 92 NO = Not detected NA = Not applicable Reported By: Steve Pope Approved By: Blake Besser .1J1.06.4. , nsecRadiochemistry A CmO nv Client Name: Waste Management of North America, Inc. Client ID: GWMW4 Lab ID: 021825-0006-SA Matrix:. AQUEOUS Sampled: 26 MAR 92 Received: 27 MAR 92 I Authorized: 27 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Gross Alpha 60 pCi/L +/- SI 900.0 NA 09 APR 92 Radium 226 1.5 pCi/L +/- 1.0 705 Modified NA 14 APR 92 Gross Beta 0.0 pCi/L +/- 40 900.0 NA 09 APR 92 Radium 228 0.0 pCi/L +/- 1.6 EPA Specified NA 09 APR 92 ND a Not detected NA = Not applicable Reported By: Ramona Power Approved By: Blake Besser Enseco Volatile Organics A Coming Company Target Compound List (TCL) Method 8240 Client Name: Waste Management of North America, Inc. I Client ID: GWMW5 Lab ID: 021920-0001-SA Matrix: AQUEOUS Sampled: 31 MAR 92 Received: 01 APR 92 I Authorized: 01 APR 92 Prepared: 07 APR 92 Analyzed: 14 APR 92 Reporting Parameter Result Units Limit Acetone ND ug/L 20 Benzene ND ug/L 10 Bromodichloromethane ND ug/L 10 Bromoform ND ug/L 10 Bromomethane ND ug/L 20 2-Butanone (MEK) ND ug/L 20 Carbon disulfide ND ug/L 10 Carbon tetrachloride ND ug/L 10 Chlorobenzene ND ug/L 10 Chloroethane ND ug/L 20 Chloroform ND ug/L 10 Chloromethane ND ug/L 20 Dibromochloromethane ND ug/L 10 1 ,1-Dichloroethane ND ug/L 10 1,2-Dichloroethane ND ug/L 10 1, 1-Dichloroethene ND ug/L 10 1,2-Dichloroethene (total ) 26 ug/L 10 1,2-Dichloropropane ND ug/L 10 cis-1,3-Dichloropropene ND ug/L 10 trans-1,3-Dichloropropene ND ug/L 10 Ethylbenzene ND ug/L 10 2-Hexanone ND ug/L 20 Methylene chloride ND ug/L 10 4-Methyl -2-pentanone (MIRK) ND ug/L 20 Styrene ND ug/L 10 1, 1,2,2-Tetrachloroethane ND ug/L 10 Tetrachioroethene 210 ug/L 10 Toluene ND ug/L 10 1,1,1-Trichloroethane ND ug/L 10 1,1,2-Trichloroethane ND ug/L 10 Trichloroethene 70 ug/L 10 Vinyl acetate ND ug/L 20 Vinyl chloride ND ug/L 20 Xylenes (total ) ND ug/L 10 Surrogate Recovery Toluene-d8 101 % 4-Bromofluorobenzene 93 % (continued on following page) ND = Not detected NA = Not applicable • Reported By: Stephanie Boehnke Approved By: Dave Roberts 931064_ Enseco Volatile Organics AComm;Company Target Compound List (TCL) Method 8240 Client Name: Waste Management of North America, Inc. Client ID: GWMWS Lab ID: 021920-0001-SA Matrix: AQUEOUS Sampled: 31 MAR 92 Received: 01 APR 92 Authorized: 01 APR 92 Prepared: 07 APR 92 Analyzed: 14 APR 92 Surrogate Recovery 1,2-Oichloroethane-d4 97 ND = Not detected NA = Not applicable Reported By: Stephanie Boehnke Approved.By: Dave Roberts o91flt! Enseco Chlorinated Pesticides and PCB's AComm%Company Target Compound List (TCL) Method 8080 Client Name: Waste Management of North America, Inc. Client ID: 6WMW5 Lab ID: 021920-0001-SA Matrix: AQUEOUS Sampled: 31 MAR 92 Received: 01 APR 92 Authorized: 01 APR 92 Prepared: 06 APR 92 Analyzed: 14 APR 92 Reporting Parameter Result Units Limit gamma-BHC (Lindane) ND ug/L 0.050 Endrin ND ug/L 0.10 Methoxychlor ND ug/L 0.50 Toxaphene ND ug/L 5.0 Surrogate Recovery Dibutyl chlorendate 61 Y. ND = Not detected NA - Not applicable Reported By: Lue Lor Approved By: Karen Kuiken O 31.06_ • Enseco RCRA Herbicides AComm Company Method 8150 Client Name: Waste Management of North America, Inc. Client ID: GWMW5 Lab ID: 021920-0001-SA Matrix: AQUEOUS Sampled: 31 MAR 92 Received: 01 APR 92 Authorized: 01 APR 92 Prepared: 06 APR 92 Analyzed: 13 APR 92 Reporting Parameter Result Units Limit 2,4-D ND ug/L 12 2,4,5-TP (Silvex) ND ug/L 1.7 Surrogate Recovery DCAA 78 ND Not detected NA - Not applicable Reported By: Lue for Approved By: Karen Kuiken :32ips Enseco Metals Ac .gCo^wny Dissolved Metals Client Name: Waste Management of North America, Inc. Client ID: GWMW5 Lab ID: 021920-0001-SA Matrix: AQUEOUS Sampled: 31 MAR 92 Received: 01 APR 92 Authorized: 01 APR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Arsenic ND mg/L 0.010 7060 NA 10 APR 92 Barium NO mg/L 0.010 6010 NA 07 APR 92 Cadmium ND mg/L 0.0050 6010 NA 07 APR 92 Calcium 474 mg/L 0.20 6010 NA 07 APR 92 Chromium ND mg/L 0.010 6010 NA 07 APR 92 Iron ND mg/L 0.10 6010 NA 07 APR 92 Lead ND mg/L 0.050 7421 NA 10 APR 92 Magnesium 647 mg/L 0.20 6010 NA 07 APR 92 Manganese 0.081 mg/L 0.010 6010 NA 07 APR 92 Mercury ND mg/L 0.00020 7470 03 APR 92 05 APR 92 Potassium 7.0 mg/L 5.0 6010 NA 07 APR 92 Selenium ND mg/L 0.050 7740 NA 13 APR 92 Silver ND mg/L 0.010 6010 NA 07 APR 92 Sodium 288 mg/L 5.0 6010 NA 07 APR 92 I I ND a Not detected NA - Not applicable Reported By: Will Pratt Approved .By: Debra Hosford 9310€". Enseco General Inorganics A CoIm.%Companv Client Name: Waste Management of North America, Inc. Client ID: GWMW5 Lab ID: 021920-0001-SA Matrix: AQUEOUS Sampled: 31 MAR 92 Received: 01 APR 92 Authorized: 01 APR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Alkalinity, Bicarb. as CaCO3 at pH 4.5 487 mg/L 5.0 310.1 NA 01 APR 92 Alkalinity, Garb. as CaCO3 at pH 8.3 ND mg/L 5.0 310.1 NA 01 APR 92 Chloride 21.0 mg/L 6.0 300.0 NA 03 APR 92 Ammonia as N ND mg/L 0.10 350.1 NA 06 APR 92 Nitrate as N 3.2 mg/L 0. 10 300.0 NA 03 APR 92 Sulfate 3800 mg/L 50.0 300.0 NA 03 APR 92 NO = Not detected NA = Not applicable _ Reported By: Steve Pope Approved•By: Blake Besser 8 31'113"'. Enseco Radiochemistry A Coming Company Client Name: Waste Management of North America, Inc. Client ID: GWMW5 Lab ID: 021920-0001-SA Matrix: AQUEOUS Sampled: 31 MAR 92 Received: 01 APR 92 I Authorized: 01 APR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Gross Alpha 19 pCi/L (+-39) 900.0 NA 14 APR 92 Radium 226 0.0 pCi/L (+-0.4) 705 Modified NA 14 APR 92 Gross Beta 36 pCi/L ((+-42) 900.0 NA 14 APR 92 Radium 228 1.4 pCi/L +-1.3) EPA Specified NA 16 APR 92 • NO = Not detected NA = Not applicable Reported By: Roxanne Sullivan Approved By: Roxanne Sullivan Volatile Organics Target Compound List (TCL) Method 8240 Client Name: Waste Management of North America, Inc. Client ID: GWMW5A Lab ID: 021887-0001-SA Matrix: AQUEOUS Sampled: 30 MAR 92 Received: 31 MAR 92 Authorized: 31 MAR 92 Prepared: 31 MAR 92 Analyzed: 29 APR 92 Reporting Parameter Result Units Limit Acetone ND ug/L 10 Benzene ND ug/L 5.0 Bromodichloromethane ND ug/L 5.0 Bromoform ND ug/L 5.0 Bromomethane ND ug/L 10 2-Butanone (MEK) ND ug/L 10 Carbon disulfide ND ug/L 5.0 Carbon tetrachloride ND ug/L 5.0 Chlorobenzene ND ug/L 5.0 Chloroethane ND ug/L 10 Chloroform ND ug/L 5.0 Chioromethane ND ug/L 10 Dibromochioromethane ND ug/L 5.0 1,1-Dichloroethane 5.4 ug/L 5.0 1,2-Dichloroethane ND ug/L 5.0 1 , 1-Dichloroethene ND ug/L 5.0 1,2-Dichloroethene (total ) 17 ug/L 5.0 1,2-Dichloropropane 5.8 ug/L 5.0 cis-1,3-Dichloropropene ND ug/L 5.0 trans-1 ,3-Dichloropropene ND ug/L 5.0 Ethylbenzene ND ug/L 5.0 2-Hexanone ND ug/L 10 Methylene chloride NO ug/L 5.0 4-Methyl -2-pentanone (MIBK) ND Styrene ND ug/L 5.0 1,1,2,2-Tetrachloroethane ND ug/L 5.0 Tetrachioroethene 140 ug/L 5.0 Toluene ND ug/L 5.0 1,1,1-Trichloroethane ND ug/L 5.0 1,1,2-Trichloroethane ND ug/L 5.0 Trichloroethene 50 ND ug/L L 10 5.0 Vinyl acetate Vinyl chloride ND ug/L 10 Xylenes (total ) ND ug/L 5.0 Surrogate Recovery Toluene-d8 99 % 4-Bromofluorobenzene 99 % (continued on following page) ND = Not detected NA = Not applicable Reported By: Shawn Kassner Approved By: Karen Kuiken S O:!O6 Volatile Organics Target Compound List (TCL) Method 8240 Client Name: Waste Management of North America, Inc. Client ID: GWMW5A Lab ID: 021887-0001-SA Matrix: AQUEOUS Sampled: 30 MAR 92 Received: 31 MAR 92 Authorized: 31 MAR 92 Prepared: 31 MAR 92 Analyzed: 29 APR 92 Surrogate Recovery 1,2-Dichloroethane-d4 94 ND - Not detected NA • Not applicable Reported By: Shawn Kassner Approved By: Karen Kuiken 93:1 OW Chlorinated Pesticides and PCB's Target Compound List (TCL) Method 8080 Client Name: Waste Management of North America, Inc. Client ID: GWMW5A Lab ID: 021887-0001-SA Matrix: AQUEOUS Sampled: 30 MAR 92 Received: 31 MAR 92 Authorized: 31 MAR 92 Prepared: 06 APR 92 Analyzed: 14 APR 92 Reporting Parameter Result Units Limit gamma-BHC (Lindane) ND ug/L 0.050 Endrin ND ug/L 0.10 Methoxychlor ND ug/L 0.50 Toxaphene ND ug/L 5.0 • Surrogate Recovery Dibutyl chlorendate 66 `I ND = Not detected NA = Not applicable Reported By: Lue Lor Approved By: Karen Kuiken '231,064_ RCRA Herbicides Method 8150 Client Name: Waste Management of North America, Inc. Client ID: GWMW5A Lab ID: 021887-0001-SA Matrix: AQUEOUS Sampled: 30 MAR 92 Received: 31 MAR 92 Authorized: 31 MAR 92 Prepared: 06 APR 92 Analyzed: 13 APR 92 Reporting Parameter Result Units Limit 2,4-D ND ug/L 12 2,4,5-TP (Silvex) ND ug/L 1.7 Surrogate Recovery DCAA 84 7e ND - Not detected NA - Not applicable Reported By: Lue Lor Approved By: Karen Kuiken 93106:t Metals Dissolved Metals Client Name: Waste Management of North America, Inc. Client ID: GWMW5A Lab ID: 021887-0001-SA Matrix: AQUEOUS Sampled: 30 MAR 92 Received: 31 MAR 92 Authorized: 31 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Arsenic ND mg/L 0.010 7060 NA 06 APR 92 Barium 0.023 mg/L 0.010 6010 NA 02 APR 92 Cadmium ND mg/L 0.0050 6010 NA 02 APR 92 Calcium 497 mg/L 0.20 6010 NA 02 APR 92 Chromium ND mg/L 0.010 6010 NA 02 APR 92 Iron ND mg/L 0.10 6010 NA 02 APR 92 Lead ND mg/L 0.10 7421 NA 06 APR 92 Magnesium 577 mg/L 0.20 6010 NA 02 APR 92 Manganese 0.24 mg/L 0.010 6010 NA 02 APR 92 Mercury ND mg/L 0.00020 7470 03 APR 92 05 APR 92 Potassium 6.8 mg/L 5.0 6010 NA 02 APR 92 Selenium ND mg/L 0.10 7740 NA 08 APR 92 Silver ND mg/L 0.010 6010 NA 02 APR 92 Sodium 238 mg/L 5.0 6010 NA 02 APR 92 ND = Not detected NA = Not applicable Reported By: Sandra Jones Approved By: Will Pratt 04.nra General Inorganics Client Name: Waste Management of North America, Inc. Client ID: GWMW5A Lab ID: 021887-0001-SA Matrix: AQUEOUS Sampled: 30 MAR 92 Received: 31 MAR 92 Authorized: 31 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Alkalinity, Bicarb. as CaC03 at pH 4.5 484 mg/L 5.0 310.1 NA 31 MAR 92 Alkalinity, Garb. as CaCO3 at pH 8.3 ND mg/L 5.0 310.1 NA 31 MAR 92 Chloride 21 .7 mg/L 6.0 300.0 NA 31 MAR 92 Ammonia as N NO mg/L 0.10 350.1 NA 06 APR 92 Nitrate as N 4.2 mg/L 0. 10 300.0 NA 31 MAR 92 Sulfate 3850 mg/L 50.0 300.0 NA 31 MAR 92 ND = Not detected NA = Not applicable Reported By: Steve Pope Approved. By: Blake Besser .93106'.- Radiochemistry Client Name: Waste Management of North America, Inc. Client ID: GWMW5A Lab ID: 021887-0001-SA Matrix: AQUEOUS Sampled: 30 MAR 92 Received: 31 MAR 92 Authorized: 31 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Radium 226 1.4 pCi/L +/- 0.9 705 Modified NA 14 APR 92 Gross Alpha 90 pCi/L +/- 50 900.0 NA 14 APR 92 Gross Beta 55 pCi/L +/- 42 900.0 NA 14 APR 92 Radium 228 0.4 pCi/L +/- 2.1 EPA Specified NA 16 APR 92 ND - Not detected NA am Not applicable Reported By: Ramona Power Approved By: Blake Besser Volatile Organics Target Compound List (TCL) Method 8240 Client Name: Waste Management of North America, Inc. Client ID: GWMW5A-DUP Lab ID: 021887-0001-DU Matrix: AQUEOUS Sampled: 30 MAR 92 Received: 31 MAR 92 Authorized: 31 MAR 92 Prepared: 31 MAR 92 Analyzed: 29 APR 92 Reporting Parameter Result Units Limit Acetone ND ug/L 10 Benzene ND ug/L 5.0 Bromodichloromethane ND ug/L 5.0 Bromoform ND ug/L 5.0 Bromomethane ND ug/L 10 2-Butanone (MEK) ND ug/L 10 Carbon disulfide ND ug/L 5.0 Carbon tetrachloride ND ug/L 5.0 Chlorobenzene ND ug/L 5.0 Chloroethane ND ug/L 10 Chloroform ND ug/L 5.0 Chloromethane ND ug/L 10 Dibromochloromethane ND ug/L 5.0 1, 1-Dichloroethane 5.9 ug/L 5.0 1,2-Dichloroethane ND ug/L 5.0 1,1-Dichloroethene ND ug/L 5.0 1,2-Dichloroethene (total ) 19 ug/L 5.0 1,2-Dichloropropane 6.6 ug/L 5.0 cis-1,3-Dichloropropene ND ug/L 5.0 trans-1,3-Dichloropropene ND ug/L 5.0 Ethylbenzene ND ug/L 5.0 2-Hexanone NO ug/L 10 Methylene chloride ND ug/L 5.0 4-Methyl -2-pentanone (MIRK) ND Styrene ND ug/L 5.0 1,1,2,2-Tetrachloroethane ND ug/L 5.0 Tetrachloroethene 150 ug/L 5.0 Toluene ND ug/L 5.0 1,1,1-Trichloroethane ND ug/L 5.0 1,1,2-Trichloroethane ND ug/L 5.0 Trichloroethene 52 ND ug/L L 10 5.0 Vinyl acetate Vinyl chloride ND ug/L 10 Xylenes (total ) ND ug/L 5.0 Surrogate Recovery Toluene-d8 99 % 4-Bromofluorobenzene 101 % (continued on following page) ND = Not detected NA = Not applicable Reported By: Shawn Kassner Approved By: Karen Kuiken .9 r0£'. Volatile Organics Target Compound List (TCL) Method 8240 Client Name: Waste Management of North America, Inc. Client ID: GWMWSA-OUP Lab ID: 021887-0001-DU Matrix: AQUEOUS Sampled: 30 MAR 92 Received: 31 MAR 92 Authorized: 31 MAR 92 Prepared: 31 MAR 92 Analyzed: 29 APR 92 Surrogate Recovery 1,2-Dichloroethane-d4 93 % ND - Not detected NA - Not applicable Reported By: ' Shawn Kassner Approved By: Karen Kuiken 87,1 064. Chlorinated Pesticides and PCB's Target Compound List (TCL) Method 8080 Client Name: Waste Management of North America, Inc. Client ID: GWMW5A-DUP Lab ID: 021887-0001-DU Matrix: AQUEOUS Sampled: 30 MAR 92 Received: 31 MAR 92 Authorized: 31 MAR 92 Prepared: 06 APR 92 Analyzed: 14 APR 92 Reporting Parameter Result Units Limit gamma-BHC (Lindane) ND ug/L 0.050 Endrin ND ug/L 0.10 Methoxychlor ND ug/L 0.50 Toxaphene ND ug/L 5.0 Surrogate Recovery Dibutyl chlorendate 69 % ND a Not detected NA a Not applicable - Reported By: Lue Lor Approved By: Karen Kuiken RCRA Herbicides Method 8150 Client Name: Waste Management of North America, Inc. Client ID: GWMW5A-DUP Lab ID: 021887-0001-DU Matrix: AQUEOUS Sampled: 30 MAR 92 Received: 31 MAR 92 Authorized: 31 MAR 92 Prepared: 06 APR 92 Analyzed: 13 APR 92 i Reporting Parameter Result Units Limit 2,4-D ND ug/L 12 2,4,5-TP (Silvex) ND ug/L 1.7 Surrogate Recovery OCAA 86 ND = Not detected NA = Not applicable Reported By: Lue Lor Approved By: Karen Kuiken Metals Dissolved Metals Client Name: Waste Management of North America, Inc. Client ID: GWMW5A-DUP Lab ID: 021887-0001-DU Matrix: AQUEOUS Sampled: 30 MAR 92 Received: 31 MAR 92 Authorized: 31 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Arsenic ND mg/L 0.010 7060 NA 06 APR 92 Barium 0.025 mg/L 0.010 6010 NA 02 APR 92 Cadmium ND mg/L 0.0050 6010 NA 02 APR 92 Calcium 506 mg/L 0.20 6010 NA 02 APR 92 Chromium ND mg/L 0.010 6010 NA 02 APR 92 Iron ND mg/L 0.10 6010 NA 02 APR 92 Lead ND mg/L 0.10 7421 NA 06 APR 92 Magnesium 586 mg/L 0.20 6010 NA 02 APR 92 Manganese 0.24 mg/L 0.010 6010 NA 02 APR 92 Mercury ND mg/L 0.00020 7470 03 APR 92 05 APR 92 Potassium 7.0 mg/L 5.0 6010 NA 02 APR 92 Selenium ND mg/L 0.10 7740 NA 08 APR 92 Silver ND mg/L 0.010 6010 NA 02 APR 92 Sodium 244 mg/L 5.0 6010 NA 02 APR 92 ND - Not detected NA - Not applicable Reported By: Sandra Jones Approved By: Will Pratt 931061 General Inorganics Client Name: Waste Management of North America, Inc. Client ID: GWMW5A-OUP Lab ID: 021887-0001-DU Matrix: AQUEOUS Sampled: 30 MAR 92 Received: 31 MAR 92 Authorized: 31 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Alkalinity, Bicarb. as CaCO3 at pH 4.5 486 mg/L 5.0 310.1 NA 31 MAR 92 Alkalinity, Carb. as CaCO3 at pH 8.3 ND mg/L 5.0 310.1 NA 31 MAR 92 Chloride 21.8 mg/L 6.0 300.0 NA 31 MAR 92 Ammonia as N ND mg/L 0.10 350.1 NA 06 APR 92 Nitrate as N 4.2 mg/L 0.10 300.0 NA 31 MAR 92 Sulfate 3840 mg/L 50.0 300.0 NA 31 MAR 92 ND = Not detected NA = Not applicable Reported By: Steve Pope Approved. By: Blake Besser 931061 Radiochemistry Client Name: Waste Management of North America, Inc. Client ID: GWMW5A-OUP Lab ID: 021887-0001-OU Matrix: AQUEOUS Sampled: 30 MAR 92 Received: 31 MAR 92 Authorized: 31 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Gross Alpha 62 pCi/L +/- 41 900.0 NA 14 APR 92 Radium 226 0.9 pCi/L +/- 0.7 705 Modified NA 14 APR 92 Gross Beta 38 pCi/L +/- 37 900.0 NA 14 APR 92 Radium 228 0.4 pCi/L +/- 1.3 EPA Specified NA 16 APR 92 ND - Not detected NA . Not applicable Reported By: Ramona Power Approved By: Blake Besser 931061 Enseco Volatile Organics A a canp.ny Target Compound List (TCL) Method 8240 Client Name: Waste Management of North America, Inc. Client ID: GWMW6 Lab ID: 021825-0001-SA Matrix: AQUEOUS Sampled: 25 MAR 92 Received: 27 MAR 92 Authorized: 27 MAR 92 Prepared: 31 MAR 92 Analyzed: 06 APR 92 Reporting Parameter Result Units Limit Acetone ND ug/L 10 Benzene ND ug/L 5.0 Bromodichloromethane ND ug/L 5.0 Bromoform ND ug/L 5.0 Bromomethane ND ug/L 10 2-Butanone (MEK) ND ug/L 10 Carbon disulfide ND ug/L 5.0 Carbon tetrachloride ND ug/L 5.0 Chlorobenzene ND ug/L 5.0 Chioroethane ND ug/L 10 Chloroform ND ug/L 5.0 Chloromethane ND ug/L 10 Dibromochloromethane NO ug/L 5.0 1,1-Dichloroethane ND ug/L 5.0 1,2-Dichloroethane ND ug/L 5.0 1, 1-Dichloroethene ND ug/L 5.0 1,2-Dichloroethene (total ) ND ug/L 5.0 1,2-Dichlaropprapane ND ug/L 5.0 cis-1,3-Dichloropropene ND ug/L 5.0 trans-1,3-Dichloropropene ND ug/L 5.0 Ethyl benzene ND ug/L 5.0 2-Hexanone ND ug/L 10 Methylene chloride ND ug/L 5.0 4-Methyl -2-pentanone (MIBK) ND ug/L 10 Styrene ND ug/L 5.0 1, 1,2,2-Tetrachloroethane ND ug/L 5.0 Tetrachloroethene ND ug/L 5.0 Toluene ND ug/L 5.0 1,1,1-Trichloroethane ND ug/L 5.0 1,1,2-Trichloroethane ND ug/L 5.0 Trichloroethene ND ug/L 5.0 Vinyl acetate ND ug/L 10 Vinyl chloride ND ug/L 10 Xylenes (total ) ND ug/L 5.0 Surrogate Recovery Toluene-d8 101 Y. 4-Bromofluorobenzene 90 7. (continued on following page) ND = Not detected NA = Not applicable Reported By: Scott McPhail Approved By: Karen Kuiken 931061 Enseco Volatile Organics A Gomm;Company Target Compound List (TCL) Method 8240 Client Name: Waste Management of North America, Inc. 4 Client ID: GWMW6 Lab ID: 021825-0001-SA Matrix: AQUEOUS Sampled: 25 MAR 92 Received: 27 MAR 92 Authorized: 27 MAR 92 Prepared: 31 MAR 92 Analyzed: 06 APR 92 ' Surrogate Recovery 1,2-Dichloroethane-d4 87 ND - Not detected NA - Not applicable Reported By: Scott McPhail Approved.By: Karen Kuiken 931061 Enseco Chlorinated Pesticides and PCB's Target Compound List (TCL) Method 8080 Client Name: Waste Management of North America, Inc. Client ID: GWMW6 Lab ID: 021825-0001-SA Matrix:. AQUEOUS Sampled: 25 MAR 92 Received: 27 MAR 92 Authorized: 27 MAR 92 Prepared: 31 MAR 92 Analyzed: 08 APR 92 Reporting Parameter Result Units Limit gamma-BHC (Lindane) ND ug/L 0.050 Endrin ND ug/L 0.10 Methoxychlor ND ug/L 0.50 Toxaphene ND ug/L 5.0 Surrogate Recovery Dibutyl chlorendate 45 ND = Not detected NA - Not applicable Reported By: Lue Lor Approved .By: Karen Kuiken 931061 Enseco RCRA Herbicides ACoaNn5G,mpanv Method 8150 Client Name: Waste Management of North America, Inc. Client ID: GWMW-6 Lab ID: 022450-0006-SA Matrix: AQUEOUS Sampled: 28 APR 92 Received: 29 APR 92 Authorized: 29 APR 92 Prepared: 01 MAY 92 Analyzed: 08 MAY 92 Reporting Parameter Result Units Limit 2,4-0 ND ug/L 12 2,4,5-TP (Silvex) NO ug/L 1.7 Surrogate Recovery DCAA 85 X ND Not detected NA - Not applicable Reported By: Susan McCool Approved By: Karen Kuiken 931061 Enseco Metals A Corning Company Dissolved Metals Client Name: Waste Management of North America, Inc. Client ID: GWMW6 Lab ID: 021825-0001-SA Matrix:. AQUEOUS Sampled: 25 MAR 92 Received: 27 MAR 92 Authorized: 27 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Arsenic ND mg/L 0.010 7060 NA 06 APR 92 Barium 0.011 mg/L 0.010 6010 NA 02 APR 92 Cadmium ND thg/L 0.0050 6010 NA 02 APR 92 Calcium 468 mg/L 0.20 6010 NA 02 APR 92 Chromium ND mg/L 0.010 6010 NA 02 APR 92 Iron ND mg/L 0.10 6010 NA 02 APR 92 Lead ND mg/L 0.050 7421 NA 06 APR 92 Magnesium 388 mg/L 0.20 6010 NA 02 APR 92 Manganese 0.011 mg/L 0.010 6010 NA 02 APR 92 Mercury ND mg/L 0.00020 7470 30 MAR 92 31 MAR 92 Potassium 8.4 mg/L 5.0 6010 NA 02 APR 92 Selenium ND mg/L 0.050 7740 NA 08 APR 92 Silver ND mg/L 0.010 6010 NA 02 APR 92 Sodium 181 mg/L 5.0 6010 NA 02 APR 92 ND = Not detected NA = Not applicable Reported By: Sandra Jones Approved .8y: Will Pratt 931061 General Inorganics Enseco A Client Name: Waste Management of North America, Inc. Client ID: GWMW6 Lab ID: 021825-0001-SA Matrix: . AQUEOUS Sampled: 25 MAR 92 Received: 27 MAR 92 Authorized: 27 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Alkalinity, Bicarb. as CaCO3 at pH 4.5 284 mg/L 5.0 310.1 NA 27 MAR 92 Alkalinity, Carb. as CaCO3 at pH 8.3 ND mg/L 5.0 310.1 NA 27 MAR 92 Chloride 57.1 mg/L 3.0 300.0 NA 27 MAR 92 Ammonia as N ND mg/L 0.10 350.1 NA 30 MAR 92 Nitrate as N 6.3 mg/L 0.10 300.0 NA 27 MAR 92 Sulfate 3030 mg/L 50.0 300.0 NA 27 MAR 92 i NO - Not detected NA - Not applicable Reported By: Steve Pope Approved .By: Blake Besser 931061 Enseco Radiochemistry A G.A G^mw^y Client Name: Waste Management of North America, Inc. Client ID: GWMW6 Lab ID: 021825-0001-SA Matrix:. AQUEOUS Sampled: 25 MAR 92 Received: 27 MAR 92 Authorized: 27 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Gross Alpha 64 pCi/L +/- 35 900.0 NA 09 APR 92 Radium 226 1 .2 pCi/L +/- 0.9 705 Modified NA 14 APR 92 Gross Beta 57 pCi/L +/- 30 900.0 NA 09 APR 92 Radium 228 0.9 pCi/L +/- 1.6 EPA Specified NA 09 APR 92 ND = Not detected NA - Not applicable Reported By: Ramona Power Approved By: Blake Besser 931061 Enseco Volatile Organics ^cw^^6� ^P^• Target Compound List (TCL) Method 8240 Client Name: Waste Management of North America, Inc. Client ID: GWMW7 Lab ID: 021825-0003-SA Matrix:. AQUEOUS Sampled: 26 MAR 92 Received: 27 MAR 92 Authorized: 27 MAR 92 Prepared: 31 MAR 92 Analyzed: 06 APR 92 Reporting Parameter Result Units Limit Acetone ND ug/L 10 Benzene ND ug/L 5.0 Bromodichloromethane ND ug/L 5.0 Bromoform ND ug/L 5.0 Bromomethane ND ug/L 10 2-Butanone (MEK) ND ug/L 10 Carbon disulfide ND ug/L 5.0 Carbon tetrachloride ND ug/L 5.0 Chlorobenzene ND ug/L 5.0 Chloroethane ND ug/L 10 Chloroform ND ug/L 5.0 Chloromethane ND ug/L 10 Dibromochloromethane ND ug/L 5.0 1,1-Dichloroethane ND ug/L 5.0 1,2-Dichloroethane 6.1 ug/L 5.0 1,1-Dichloroethene ND ug/L 5.0 1,2-Oichloroethene (total ) ND ug/L 5.0 1,2-Dichloropropane ND ug/L 5.0 cis-1,3-Dichloropropene ND ug/L 5.0 trans-1,3-Dichloropropene ND ug/L 5.0 Ethyl benzene ND ug/L 5.0 2-Hexanone ND ug/L 10 Methylene chloride 10 ug/L 5.0 4-Methyl -2-pentanone (MIBK) ND ug/L 10 Styrene ND ug/L 5.0 1,1,2,2-Tetrachloroethane ND ug/L 5.0 Tetrachloroethene 9.5 ug/L 5.0 Toluene ND ug/L 5.0 1,1,1-Trichloroethane ND ug/L 5.0 1,1,2-Trichloroethane ND ug/L 5.0 Trichloroethene ND ug/L 5.0 Vinyl acetate ND ug/L 10 Vinyl chloride ND ug/L 10 Xylenes (total ) ND ug/L 5.0 Surrogate Recovery Toluene-d8 103 7. 4-Bromofluorobenzene 92 IL (continued on following page) ND = Not detected NA = Not applicable • Reported By: Scott McPhail Approved By: Karen Kuiken 931061 Enseco Volatile Organics �C� Target Compound List (TCL) Method 8240 Client Name: Waste Management of North America, Inc. Client ID: GWMW7 Lab ID: 021825-0003-SA Matrix: AQUEOUS Sampled: 26 MAR 92 Received: 27 MAR 92 Authorized: 27 MAR 92 Prepared: 31 MAR 92 Analyzed: 06 APR 92 Surrogate Recovery 1,2-Dichloroethane-d4 91 1 • ND - Not detected NA a Not applicable Reported By: Scott McPhail Approved By: Karen Kuiken r - 931061 Enseco Chlorinated Pesticides and PCB's icon tngcumwny Target Compound List (TCL) Method 8080 Client Name: Waste Management of North America, Inc. Client ID: GWMW7 Lab ID: 021825-0003-SA Matrix: AQUEOUS Sampled: 26 MAR 92 Received: 27 MAR 92 Authorized: 27 MAR 92 Prepared: 31 MAR 92 Analyzed: 08 APR 92 Reporting Parameter Result Units Limit gamma-BHC (Lindane) ND ug/L 0.050 Endrin ND ug/L 0.10 Methoxychlor ND ug/L 0.50 Toxaphene ND ug/L 5.0 Surrogate Recovery Dibutyl chlorendate 75 9e ND = Not detected NA = Not applicable Reported By: Lue Lor Approved -By: Karen Kuiken 931061 Enseco RCRA Herbicides n• • - Method 8150 Client Name: Waste Management of North America, Inc. Client ID: GWMW7 Lab ID: 021825-0003-SA Matrix: AQUEOUS Sampled: 26 MAR 92 Received: 27 MAR 92 Authorized: 27 MAR 92 Prepared: 30 MAR 92 Analyzed: 13 APR 92 Reporting Parameter Result Units Limit 2,4-0 ND ug/L 12 2,4,5-TP (Silvex) ND ug/L 1.7 Surrogate Recovery DCAA 81 9. ND Not detected NA = Not applicable Reported By: Lue Lor Approved By: Karen Kuiken 931061 Enseco Metals ACS mgcw pane Dissolved Metals Client Name: Waste Management of North America, Inc. Client ID: GWMW7 Lab ID: 021825-0003-SA Matrix: AQUEOUS Sampled: 26 MAR 92 Received: 27 MAR 92 Authorized: 27 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Arsenic ND mg/L 0.010 7060 NA 06 APR 92 Barium 0.021 mg/L 0.010 6010 NA 02 APR 92 Cadmium ND mg/L 0.0050 6010 NA 02 APR 92 Calcium 416 mg/L 0.20 6010 NA 02 APR 92 Chromium ND mg/L 0.010 6010 NA 02 APR 92 Iron ND mg/L 0.10 6010 NA 02 APR 92 Lead ND mg/L 0.050 7421 NA 06 APR 92 Magnesium 396 mg/L 0.20 6010 NA 02 APR 92 Manganese 0.26 mg/L 0.010 6010 NA 02 APR 92 Mercury ND mg/L 0.00020 7470 30 MAR 92 31 MAR 92 Potassium 7.6 mg/L 5.0 6010 NA 02 APR 92 Selenium ND mg/L 0.050 7740 NA 08 APR 92 Silver ND mg/L 0.010 6010 NA 02 APR 92 Sodium 217 mg/L 5.0 6010 NA 02 APR 92 • ND = Not detected NA = Not applicable - Reported By: Sandra Jones Approved By: Will Pratt 931061 Enseco General Inorganics "c..^s C.np.ny Client Name: Waste Management of North America, Inc. Client ID: GWMW7 Lab ID: 021825-0003-SA Matrix: AQUEOUS Sampled: 26 MAR 92 Received: 27 MAR 92 Authorized: 27 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Alkalinity, Bicarb. as CaCO3 at pH 4.5 493 mg/L 5.0 310.1 NA 27 MAR 92 Alkalinity, Garb. as CaCO3 at pH 8.3 ND mg/L 5.0 310.1 NA 27 MAR 92 Chloride 13.7 mg/L 3.0 300.0 NA 27 MAR 92 Ammonia as N ND mg/L 0.10 350.1 NA 30 MAR 92 Nitrate as N 1 .6 mg/L 0.10 300.0 NA 27 MAR 92 Sulfate 2740 mg/L 50.0 300.0 NA 27 MAR 92 i i ND = Not detected NA = Not applicable Reported By: Steve Pope Approved By: Blake Besser 931061 Enseco Radiochemistry Company Client Name: Waste Management of North America, Inc. Client ID: GWMW7 Lab ID: 021825-0003-SA Matrix: AQUEOUS Sampled: 26 MAR 92 Received: 27 MAR 92 Authorized: 27 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Radium 226 0.0 pCi/L +/- 0.4 705 Modified NA 14 APR 92 Gross Alpha 82 pCi/L +/- 36 900.0 NA 09 APR 92 Gross Beta 76 pCi/L +/- 32 900.0 NA 09 APR 92 Radium 228 1.3 pCi/L +/- 1.3 EPA Specified NA 09 APR 92 I ND = Not detected NA = Not applicable Reported By: Ramona Power Approved .By: Blake Sesser 931061 Enseco Volatile Organics AC,m,gco,o.nv Target Compound List (TCL) Method 8240 Client Name: Waste Management of North America, Inc. Client ID: GWMW8 Lab ID: 021837-0003-SA Matrix: AQUEOUS Sampled: 27 MAR 92 Received: 28 MAR 92 . Authorized: 28 MAR 92 Prepared: 31 MAR 92 Analyzed: 09 APR 92 Reporting Parameter Result Units Limit ND ug/L 9/L 10 Benzene ND ug/L 5.0 Bromodichloromethane ND ug/L 5.0 Bromoform ND ug/L 5.0 Bromomethane ND ug/L 10 2-Butanone (MEK) ND ND g 0.0/L 10 Carbon disulfide Carbon tetrachloride ND ug/L 5.0 Chlorobenzene NO ug/L 5.0 Chloroethane ND ug/L 10 Chloroform ND ND ug/L L 10 5.0 Chloromethane Dibromochioromethane NO ug/L 5.0 1, 1-Dichioroethane ND ug/L 5.0 1,2-Dichioroethane ND ug/L 5.0 1,1-Dichloroethene NO ug/L 5.0 1,2-Dichloroethene I (total ) ND ug/L 5.0 1,2-Dichloropropane ND ug/L 5.0 cis-1,3-Dichloropropene ND ug/L 5.0 trans-1,3-Dichloropropene ND ug/L 5.0 Ethylbenzene ND ug/L 5.0 2-Hexanone ND ug/L 10 Methylene chloride ND ug/L 5.0 4-Methyl -2-pentanone (MIBK) ND ug/L 10 1, ene ND ug/L 5.0 1,2,,2-Tetrachloroethane ND ug/L 5.0 Tetrachloroethene ND ug/L 5.0 Toluene ND ug/L 5.0 1,1,1-Trichloroethane ND ug/L 5.0 1, 1,2-Trichloroethane ND ug/L 5.0 Trichloroethene . ND ug/L 5.0 Vinyl acetate ND ug/L 10 Vinyl chloride NO ug/L 10 Xylenes (total ) ND ug/L 5.0 Surrogate Recovery Toluene-d8 105 % 4-Bromofluorobenzene 96 % (continued on following page) ND = Not detected NA = Not applicable Reported By: Stephanie Boehnke Approved By: Karen Kuiken 931061 Radiochemistry Enseco Client Name: Waste Management of North America, Inc. Client ID: GWMW11 Lab ID: 021825-0007-SA Matrix: AQUEOUS Sampled: 26 MAR 92 Received: 27 MAR 92 Authorized: 27 MAR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Radium 226 2.5 pCi/L +/- 1.3 705 Modified NA 14 APR 92 Gross Alpha 10 pCi/L +/- 31 900.0 NA 09 APR 92 Gross Beta 22 pCi/L +/- 31 900.0 NA 09 APR 92 Radium 228 2.4 pCi/L +/- 1.7 EPA Specified NA 09 APR 92 ND = Not detected NA . Not applicable Reported By: Ramona Power Approved By: Blake Sesser 931061 Enseco Volatile Organics ACommgC°"'a^' Target Compound List (TCL) Method 8240 Client Name: Waste Management of North America, Inc. Client ID: GWMW12 Lab ID: 021920-0003-SA Matrix: AQUEOUS Sampled: 31 MAR 92 Received: 01 APR 92 Authorized: 01 APR 92 Prepared: 07 APR 92 Analyzed: 14 APR 92 Reporting Parameter Result Units Limit Acetone ND ug/L 10 Benzene ND ug/L 5.0 Bromodichloromethane ND ug/L 5.0 Bromoform ND ug/L 5.0 Bromomethane ND ug/L 10 2-Butanone (MEK) ND ug/L 10 Carbon disulfide ND ug/L 5.0 Carbon tetrachloride ND ug/L 5.0 Chlorobenzene ND ug/L 5.0 Chloroethane ND ug/L 10 Chloroform ND ug/L 5.0 Chloromethane ND ug/L 10 Dibromochloromethane ND ug/L 5.0 1, 1-Dichloroethane ND ug/L 5.0 1,2-Dichloroethane ND ug/L 5.0 1, 1-Dichloroethene ND ug/L 5.0 1,2-Dichloroethene (total ) ND ug/L 5.0 1,2-Dichloroppropane ND ug/L 5.0 cis-1,3-Dichloropropene ND ug/L 5.0 trans-1,3-Dichloropropene ND ug/L 5.0 I Ethyl benzene ND ug/L 5.0 2-Hexanone ND ug/L 10 Methylene chloride ND ug/L 5.0 4-Methyl -2-pentanone (MIBK) ND ug/L 10 Styrene ND ug/L 5.0 1,1,2,2-Tetrachloroethane ND ug/L 5.0 Tetrachloroethene ND ug/L 5.0 . Toluene ND ug/L 5.0 1,1,1-Trichloroethane ND ug/L 5.0 1,1,2-Trichloroethane ND ug/L 5.0 Trichlaroethene ND ug/L 5.0 Vinyl acetate ND ug/L 10 Vinyl chloride ND ug/L 10 Xylenes (total ) ND ug/L 5.0 Surrogate Recovery Toluene-d8 102 % 4-Bromofluorobenzene 94 % (continued on following page) ND = Not detected NA = Not applicable • - Reported By: Stephanie Boehnke Approved By: Dave Roberts 931061 Enseco Volatile Organics ACammgCompany Target Compound List (TCL) Method 8240 Client Name: Waste Management of North America, Inc. Client ID: GWMW12 Lab ID: 021920-0003-SA Matrix: AQUEOUS Sampled: 31 MAR 92 Received: 01 APR 92 Authorized: 01 APR 92 Prepared: 07 APR 92 Analyzed: 14 APR 92 Surrogate Recovery 1,2-Dichloroethane-d4 102 ND = Not detected NA = Not applicable Reported By: Stephanie Boehnke Approved By: Dave Roberts 931061 Enseco Chlorinated Pesticides and PCB's Acommccump.nv Target Compound List (TCL) Method 8080 Client Name: Waste Management of North America, Inc. Client ID: GWMW12 Lab ID: 021920-0003-SA Matrix: AQUEOUS Sampled: 31 MAR 92 Received: 01 APR 92 Authorized: 01 APR 92 Prepared: 06 APR 92 Analyzed: 14 APR 92 Reporting Parameter Result Units Limit gamma-BHC (Lindane) ND ug/L 0.050 Endrin ND ug/L 0.10 Methoxychior ND ug/L 0.50 Toxaphene ND ug/L 5.0 Surrogate Recovery Dibutyl chlorendate 67 Ye ND = Not detected NA = Not applicable Reported By: Lue Lor Approved.By: Karen Kuiken 931061 Enseco RCRA Herbicides AComInsCumwnr Method 8150 Client Name: Waste Management of North America, Inc. Client ID: GWMW12 Lab ID: 021920-0003-SA Matrix: AQUEOUS Sampled: 31 MAR 92 Received: 01 APR 92 Authorized: 01 APR 92 Prepared: 06 APR 92 Analyzed: 13 APR 92 Reporting Parameter Result Units Limit 2,4-0 ND ug/L 12 2,4,5-TP (Silvex) ND ug/L 1.7 Surrogate Recovery DCAA 80 9. ND = Not detected NA = Not applicable Reported By: Lue Lor Approved.By: Karen Kuiken 931061 Enseco Metals A com�e comw�, Dissolved Metals Client Name: Waste Management of North America, Inc. Client ID: GWMW12 Lab ID: 021920-0003-SA Matrix: AQUEOUS Sampled: 31 MAR 92 Received: 01 APR 92 Authorized: 01 APR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Arsenic ND mg/L 0.010 7060 NA 10 APR 92 Barium 0.011 mg/L 0.010 6010 NA 07 APR 92 Cadmium 0.0053 mg/L 0.0050 6010 NA 07 APR 92 Calcium 487 mg/L 0.20 6010 NA 07 APR 92 Chromium 0.012 mg/L 0.010 6010 NA 07 APR 92 Iron ND mg/L 0.10 6010 NA 07 APR 92 Lead ND mg/L 0.050 7421 NA 10 APR 92 Magnesium 771 mg/L 0.20 6010 NA 07 APR 92 Manganese 1 .1 mg/L 0.010 6010 NA 07 APR 92 Mercury ND mg/L 0.00020 7470 03 APR 92 05 APR 92 Potassium 16.1 mg/L 5.0 6010 NA 07 APR 92 Selenium ND mg/L 0.050 7740 NA 13 APR 92 Silver ND mg/L 0.010 6010 NA 07 APR 92 Sodium 490 mg/L 5.0 6010 NA 07 APR 92 ND = Not detected NA = Not applicable Reported By: Will Pratt Approved. By: Debra Hosford 931061 Enseco General Inorganics A Corms Company 1.. Client Name: Waste Management of North America, Inc. Client ID: GWMW12 Lab ID: 021920-0003-SA Matrix: AQUEOUS Sampled: 31 MAR 92 Received: 01 APR 92 Authorized: 01 APR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Alkalinity, Bicarb. as CaC03 at pH 4.5 562 mg/L 5.0 310.1 NA 01 APR 92 Alkalinity, Carb. as CaC03 at pH 8.3 ND mg/L 5.0 310.1 NA 01 APR 92 Chloride 33.8 mg/L 6.0 300.0 NA 03 APR 92 Ammonia as N 1.4 mg/L 0.10 350.1 NA 06 APR 92 Nitrate as N 0.58 mg/L 0.20 300.0 NA 03 APR 92 Sulfate 4870 mg/L 125 300.0 NA 03 APR 92 ND = Not detected NA - Not applicable Reported By: Steve Pope Approved By: Blake Besser 931061 Enseco Radiochemistry a cammb comwny Client Name: Waste Management of North America, Inc. Client ID: GWMW1Z Lab ID: 021920-0003-SA Matrix: AQUEOUS Sampled: 31 MAR 92 Received: 01 APR 92 I Authorized: 01 APR 92 Prepared: See Below Analyzed: See Below Reporting Analytical Prepared Analyzed Parameter Result Units Limit Method Date Date Gross Alpha 5 pCi/L (+-40) 900.0 NA 14 APR 92 Radium 226 1.0 pCi/L (+-0.7) 705 Modified NA 14 APR 92 Gross Beta 0 pCi/L ((+-39) 900.0 NA 14 APR 92 Radium 228 1.4 pCi/L +-1.5) EPA Specified NA 16 APR 92 • ND = Not detected NA = Not applicable • Reported By: Roxanne Sullivan Approved By: Roxanne Sullivan 931061 July 1992 -23- 913-2403 integrity data sheets for the surface water samples and groundwater samples are provided in Appendix F. 9:1061 Golder Associates July 1992 -24- 913-2403 3.0 GEOLOGY 3.1 Physiographic and Geologic Setting The site is located on the rolling upland unit of the Colorado Piedmont section of the Great Plains Physiographic Province as mapped by Crosby (1978). The rolling upland unit consists of broad areas of nearly flat to gently rounded surfaces between major stream valleys. The site lies near the northern margin of the Laramie and Fox Hills geologic units which are part of the hydrologic Denver Basin (Figure 3-1). 3.2 Stratigraphy Based upon data collected during the field investigation, a stratigraphic model has been developed. The three geologic units which have been delineated at the site are: ► The Surficial, Unconsolidated unit; ► The Upper Weathered Bedrock unit; and, ► The Lower Weathered Bedrock unit. Based on a literature review the surficial unconsolidated unit is interpreted as Quaternary-aged and the two bedrock units are interpreted as Upper Cretaceous age. A geologic fence diagram illustrating the vertical and lateral distribution of these units is included as Figure 3-2. Golder Associates 921061 July 1992 -25- 913-2403 3.2.1 The Surficial Unconsolidated Unit The bedrock units at the site are overlain by a yellowish brown to brownish yellow, eolian deposit ranging in texture from silty clay to clayey silt. This unit is referred to herein as the Surficial Unconsolidated Unit. This unit is mapped by Colton (1978) as Quaternary Eolium (eolium is a term introduced by Colton to designate wind-deposited silts and sands). The significant clay content of the material as it presently exists is likely the result of in-situ weathering. The unit is no longer continuous across the site due to past landfilling activities. The thickness of the unit at points along the perimeter of the site may be obtained from the fence diagram presented in Figure 3-2. Where present the surficial unconsolidated unit varies in thickness from a few feet to nearly thirty feet. Where present, the Surficial Unconsolidated Unit is quite homogenous vertically as well as laterally, which is typical of a wind-deposited sediment. The unit is well-sorted, also a feature germane to eolian sediments, and is comprised of clay, silt and fine sand. Fine grained materials within the upper consolidated unit were described as varying between silty clay and clayey silt. Laboratory results discussed in Section 5 confirm the variable nature of the fine-grained materials. 3.2.2 The Upper Weathered Bedrock Unit The unit underlying the Surficial Unconsolidated Unit at the site is herein designated the Upper Weathered Bedrock. The Upper Weathered Bedrock is an interbedded to interlaminated silty fine sandstone and claystone of Upper Cretaceous age. Lenses of gypsum occur throughout the unit. The color of the material ranges from dark grey to yellowish brown to dark orange. The unit has been weathered to the extent that the material is poorly indurated and little original sedimentary structure remains. The Upper Weathered Bedrock appears to have a high degree of lateral variability with respect to continuity of interbeds and interlaminae. In addition, at some locations one or the other of the materials (silty fine sandstone or claystone) are dominant as shown in the geologic fence diagram (Figure 3-2). The surface of the unit appears to be erosional and reflects the current topography of the site. Figures 3-3A and 3-3B are contour maps of the top of the Upper Weathered Bedrock. Figure 3-3A is an 11"x17" figure which `'11S Golder Associates July 1992 -26- 913-2403 allows for rapid identification of trends across the site. Figure 3-38 is a 2'x3' sheet which allows for more precise identification of elevations at particular locations. Figure 3-4 is a thickness map of the Upper Weathered Bedrock at the site. The thickness of the Upper Weathered Bedrock unit varies from approximately 40 feet to about 70 feet, with the thickest portion present near the southern boundary of the site. The highly variable nature of the Upper Weathered Bedrock is readily explained by the depositional environment of the unit. The Upper Cretaceous units in the vicinity of the Front Range of Colorado have been interpreted as deltaic in origin by Rahmanian, 1975, Weimer, 1973, Briscoe, 1972 and others. The depositional environment of these units may be likened to the present day Mississippi River delta region of Louisiana, where sedimentation patterns are governed by changes in water levels, sediment load and river hydraulics. At the Central Weld site, sandstone lenses or stringers may reflect changes in the position of a channel or an increase in the energy of the local depositional system. Claystone deposits may, for example, indicate the location of an overbank deposit where natural levees were breached during high-water periods. Two large paleochannels, which appear to have been formed on the paleo-surface of the Upper Weathered Bedrock, were noted in the east-west trending trench wall at the northernmost property boundary of the site. The direction of trend of these channels was not determined since only one point of observation was afforded. The paleochannels are comprised of sands and silty sands which are typically coarser-grained than the surrounding material. Based on laboratory analyses of samples from the Upper Weathered Bedrock at the site, as described in Section 5, the fine-grained materials (claystones) have been classified as CL to CH in accordance with the USCS while the coarse-grained materials (sandstones and silty fine sandstones) have been classified as ML to SM (USCS). Golder Associates 931.961 July 1992 -27- 913-2403 3.2.3 The Lower Weathered Bedrock Unit The deepest unit drilled and sampled at the site is a weathered, grey, interbedded to interlaminated silty fine sandstone and claystone herein designated as the Lower Weathered Bedrock. The Lower Weathered Bedrock is of Upper Cretaceous age. The upper 15 feet of the Lower Weathered Bedrock was cored and sampled. Therefore the following description pertains to that interval. Due to the close similarities in lithologies and sedimentological features, the contact between the Upper Weathered Bedrock and the Lower Weathered Bedrock is herein delineated by a color change from predominantly brownish hues in the overlying Upper Weathered Bedrock to grayish hues in the underlying Lower Weathered Bedrock. However, the typically sharp nature of the contact in conjunction with a zone of bioturbation of the sediments immediately overlying the Lower Weathered Bedrock indicates that the contact is in fact genuinely a geologic one and not simply a weathering front. The silty fine sandstones of the Lower Weathered Bedrock are typically light to medium grey in color; the claystones are generally a medium to dark grey. While the degree of weathering is slightly less than that observed in the Upper Weathered, Bedrock the Lower Weathered Bedrock material is nonetheless poorly indurated and little sedimentary structure remains. The claystones are typically completely weathered to a fairly plastic clay. The upper surface of the Lower Weathered Bedrock appears to roughly reflect current natural topography. Figure 3-5 is a contour map of the top of the Lower Weathered Bedrock. Since the base of the unit was not drilled, no thickness map is available. The genesis of this unit is interpreted to be deltaic, based on the similarity to the overlying Upper Weathered Bedrock unit and a review of the literature. Since none of the samples from this unit were retrieved as a soil (i.e. samples were all of rock core) no soil classifications were performed. However, based upon the similarities of the Upper Golder Associates 931.061 July 1992 -28- 913-2403 Weathered Bedrock and the Lower Weathered Bedrock similar grain-size distributions are expected. Golder Associates 931061 July 1992 -29- 913-2403 4.0 HYDROGEOLOGY In order to characterize the site hydrogeology, it is necessary to develop an understanding of the site stratigraphy, the hydraulic conductivity of the various stratigraphic units, the direction and rate of groundwater flow, the aquifers at the site and groundwater quality. Section 3.2 detailed the site stratigraphy. This section addresses the remaining hydrologic components. 4.1 Results of Previous Investigations Warzyn Engineering, Inc. conducted a hydrogeologic assessment study in 1984 and Industrial Compliance Inc. conducted a groundwater investigation in 1991. The Warzyn Engineering Inc. hydrogeologic investigation dealt with the shallow groundwater zone and presented the following conclusions: ► Direction of groundwater flow is to the south and a southwesterly component exists in the western one-half of the site; ► The hydraulic gradient is approximately 0.03 ft./ft. ► The hydraulic conductivity values for the surficial material, obtained from baildown (rising head) tests were determined to be 3x10° cm/sec for GWMW-1 and 1x104 cm/sec for GWMW-4; and, ► The hydraulic conductivity values for the herein designated Upper Weathered Bedrock for GWMW-2, GWMW-3 and GWMW-5 ranged from 2x10's cm/sec to 2x104 cm/sec. The 1991 Industrial Compliance, Inc. groundwater investigation further defined the shallow groundwater zone and presented the following conclusions: ► The direction of groundwater flow is to the south to southeast; and, ► Groundwater flows along the surficial material/upper bedrock contact. Golder Associates 9:1.96'1 July 1992 -30- 913-2403 The following sections present the hydrogeologic data obtained during the current investigation. 4.2 Hydraulic Conductivity 4.2.1 In-Situ Hydraulic Conductivity The methodology employed to obtain in-situ hydraulic conductivity values for the stratigraphic units present at the site has been presented in Section 2.5. Table 2-2 summarizes the results of the in-situ hydraulic conductivity. Raw and analytical data are presented in Appendix H. Both the Upper Weathered Bedrock and the Lower Weathered Bedrock were tested. Hydraulic conductivity values for the Upper Weathered Bedrock range from 1.3x10-3 cm/sec to 8.3x104 cm/sec with a geometric mean value of 9.2x104 cm/sec. Hydraulic conductivity values for the Lower Weathered Bedrock range from 1.1x104 cm/sec to 7.0x104 with a geometric mean of 2.5x10-5 cm/sec. As detailed in Section 3.2, both the Upper Weathered Bedrock and the Lower Weathered Bedrock are comprised of interlayered coarse-grained and fine-grained materials. Bedding in these units is essentially horizontal. The implications of these aspects of the stratigraphy with respect to hydraulic conductivity values are twofold. First, the in-situ hydraulic conductivity values likely reflect the contribution by the coarse-grained layers of the materials. Second, since the layering of the materials is essentially horizontal, the values resulting from in-situ testing may be considered horizontal hydraulic conductivity values. 4.2.2 Laboratory Prme eability Testing As presented in Section 5.4 and Table 5-2, the laboratory testing program consisted of evaluating fine-grained and coarse-grained materials separately and together. Laboratory permeability test results reflect the vertical permeability of the material. Accordingly, small interbeds of clays can have a pronounced influence on the laboratory permeability results. Laboratory permeability. Golder/associates 931061 July 1992 -31- 913-2403 values for the fine-grained materials were lx10-9 cm/sec and 4x104 cm/sec with a geometric mean of 6.3x10-9 cm/sec. Laboratory permeability values for the coarse-grained materials were 3x10'5 cm/sec and 2x104 cm/sec with a geometric mean of 2.5x10'5 cm/sec. One sample containing both fine-grained and coarse-grained materials yielded a permeability value of 2x104 cm/sec. Hydraulic conductivity (permeability)values for the coarse-grained materials obtained by in-situ methods and laboratory testing are generally in agreement with one another. Even though individual fine-grained layers within the weathered bedrock units are not suspected to be continuous across the site, the high frequency of occurrence of fine-grained interlayers and consistent nature of the weathered bedrock units across the site suggests that the effective vertical hydraulic conductivity values for the weathered bedrock units at the site are similar to the laboratory values. 4.3 Horizontal Groundwater Flow Three saturated zones were defined at the site. The first zone is apparently perched and is restricted to the area near the northeast corner of the site. The second zone is approximately coincident with the top of the Upper Weathered Bedrock. The third zone occurs within the upper portion of the Lower Weathered Bedrock and to some extent the lower portion of the Upper Weathered Bedrock. Table 4-1 presents the historical groundwater elevations in the monitoring wells, soil gas probes and trash piezometers. 4.3.1 Upper Weathered Bedrock The uppermost saturated zone (excluding the perched zone) is generally within the upper portion of the Upper Weathered Bedrock. Figures 4-lA and 4-1B present potentiometric contour maps of the shallow groundwater. Figure 4-1A is an 11"x17" figure which allows for rapid identification of trends across the site. Figure 4-1B is a 2'x3' sheet which allows for more Golder Associates 9:1961 July 1992 -32- 913-2403 precise identification of elevations at particular locations. Figures 4-lA and 4-1B are based on all available information, including groundwater monitoring wells, soil gas probes, geotechnical borings, trash piezometers installed by Industrial Compliance, diversion trench elevations, approximate elevations of the french drain, and surface topography. Figures 4-lA and 4-1B indicate that the overall direction of groundwater flow in the shallow saturated zone is towards the south. The average horizontal hydraulic gradient is approximately 0.03 ft./ft. Assuming an effective porosity of 30% (Freeze and Cherry, 1979) and a hydraulic conductivity of 9.2x104cm/sec(Section 5.2.1), the average horizontal groundwater flow velocity is calculated to be approximately 95 feet per year. The shallow groundwater is apparently mounded in the east-central portion of the site. The groundwater mound corresponds to a localized high point in the top of Upper Weathered Bedrock (Figures 3-3A and 3-3B). In the northwestern portion of the site, the water levels are relatively high as evidenced by TP-1, TP-2, and P-2 data. Apparently, elevated groundwater levels in this area are caused by water infiltrating through the diversion trench along the northwestern portion of the landfill. The diversion trench in this area is unlined and is not underlain by a french drain system. Furthermore, Figure 3-2 shows that a silty sand unit is present in this area. The silty sand unit may enhance infiltration from the diversion trench. Section 4.3.5 discusses the water levels in this area compared to the base of solid waste. The water level contours near northeastern portion of the site, adjacent to the diversion trench, are based on the elevation of the diversion trench and the approximate elevations of the french drain. Of particular interest are the water levels east of the diversion trench in GWMW-2, SG- 17, SG-18, and SG-19. The water levels in these borings are somewhat higher than would be expected based the data west of the diversion trench and are inferred to represent perched conditions. Based on geologic mapping of the material exposed along the eastern wall of the SZ1061 Golder Associates July 1992 -33- 913-2403 diversion trench, a claystone unit is present at a relatively shallow depth in this area. Groundwater was observed seeping into the trench from the soil/claystone contact. Evidently, the claystone unit in this area is acting as a barrier to downward migration of water and is resulting in perched conditions east of the trench. The perched water is probably maintained at an artificially high level due to irrigation activities known to occur immediately north and east of the landfill. The irrigation activities likely provide increased recharge to the groundwater east of the trench. According to landfill employees, the water level east of the trench, as observed at the east wall of the trench, rises a few feet during the irrigation season. A similar rise is not observed along the western wall of the trench, since irrigation does not occur on the landfill. 4.3.3 Lower Weathered Bedrock Deep groundwater monitoring wells GWMW-8 through GWMW-14 were screened within the Lower Weathered Bedrock. Adjacent shallow wells screened within the Upper Weathered Bedrock indicate a saturated zone in the upper portion of the Upper Weathered Bedrock. The deep wells indicate a saturated zone within the upper portion of the Lower Weathered Bedrock. During drilling a relatively dry zone was noted within the Upper Weathered Bedrock. The presence of the dry material suggests that the degree of communication between the shallow and deep saturated zones is minimal. Figure 4-2 is a contour map of the deep groundwater potentiometric surface. Based on information presented in Figure 4-2, the direction of groundwater flow in that zone is towards the south-southeast. The average horizontal groundwater gradient in the lower groundwater zone is approximately 0.02 ft./ft.. Assuming an effective porosity of 30% (Freeze and Cherry, 1979) and a hydraulic conductivity of 2.5x10'3 cm/sec (Section 5.1.1), the average horizontal groundwater flow velocity is calculated to be approximately 2 feet per year. 9:1961 Golder Associates July 1992 -34- 913-2403 4.4 Vertical Groundwater Flow Seven deep/shallow well pairs exist at the site. At the upgradient well pairs, downward vertical gradients exist (-0.40 to -0.80). Well pairs near Spomer Lakes exhibit slight downward to upward gradients (-0.11 to +0.01). At the downgradient well pair which is not near Spomer Lakes (GWMW-12 and GWMW-5N) a slight downward gradient exists (-0.014). Table 4-2 is a summary of vertical gradients at the well pairs. The slight gradients at the well pairs adjacent to Spomer Lakes may indicate that the lakes are locally recharging groundwater. It should be noted that the vertical gradient may change seasonally. 4.5 Depth to Groundwater in Landfilled Areas As mentioned in Section 1.4, seven trash piezometers (TP-1 through TP-7) were installed in 1991 under the supervision of Industrial Compliance Inc. (IC). The purpose of these piezometers was to delineate depths and thicknesses of refuse. IC reported that groundwater was above the base of trash in piezometers TP-1 and TP-6 at heights ranging of 1.92 feet and 0.42 feet, respectively. In addition, IC made recommendations concerning the conceptual design of the groundwater collection/diversion ditch located along the northern and eastern edges of the landfill. The purpose of this ditch was to control groundwater levels below the landfill. As part of the recent field investigation, water levels were measured in all of the trash piezometers in order to evaluate the effectiveness of the groundwater collection/diversion ditch. Table 4-3 summarizes the water levels measured in the trash piezometers with respect to base of solid waste as reported by IC in their 1991 report. Groundwater was present above the base of solid waste at only one location, piezometer TP-1, where groundwater was 6.34 feet above the base of solid waste. As shown on Figure 2-1, TP-1 is located near the northwest corner of the site. In this vicinity, the groundwater collection/diversion ditch is unlined, potentially resulting in local recharge in the area of TP-1. 921061 Golder Associates • July 1992 -35- 913-2403 5.0 LABORATORY SOILS TESTING 5.1 Summary of Laboratory Soils Testing Laboratory soils testing was conducted at the Golder soils laboratory in Denver, Colorado in accordance with standard ASTM methods in order to characterize the physical and mechanical properties of the geologic materials at the site. Laboratory soils testing included: ► Natural moisture content, ► Particle size analysis, ► Liquid and plastic limits, ► Classification, ► Permeability, and; ► Consolidation. In addition to the testing done at the Golder laboratory, five samples were sent to Analytica Laboratory of Golden, Colorado for soil chemistry analyses for Cation Exchange Capacity (CEC) and pH. Table 5-1 presents a summary of the laboratory soils data. A review of Table 5-1 indicates that the Surficial Unconsolidated Unit as described in Section 3.2.1 generally classifies as a silty clay to clayey silt, with interbeds of silty sand. The laboratory testing results were used to verify field descriptions made during logging. 924.as Golder Associates July 1992 -36- 913-2403 The Upper Weathered Bedrock, which is described in detail in Section 3.2.2 is a combination of coarse-grained and fine-grained materials. USCS classifications for this unit include CL, ML and SM (clay, silt and silty sand, respectively). The Lower Weathered Bedrock, described in detail in Section 3.2.3, was somewhat more competent than the overlying unit and was sampled using rock coring methods. Therefore soil testing was not conducted on this unit. However, field classifications assigned to this unit were quite similar to those of the overlying unit, suggesting that similar grain-size distributions may be expected. Grain-size curves and compaction test results (where appropriate) for the soil samples tested appear in Appendix G. 5.2 Natural Moisture Content Natural moisture content values were determined for all of the soil samples tested by the soil laboratory. Values for natural moisture content ranged from 6.7 % to 24.6 % with a mean value of 15.8 % and a standard deviation of 4.7 %. Moisture content values were not clustered around any one soil type. Natural moisture content was typically near the plastic limit for the materials classified as CL according to the USCS. 5.3 Specific Gravity Specific gravity values were obtained for 24 samples. Values for specific gravity range from 2.66 to 2.74 with a mean value of 2.69 and a standard deviation of 0.02. Specific gravity is a unit-less value. The narrow range of values and the lack of clustering of these values around a particular geologic unit is likely due to a common source for the redeposited sediments present at the site. .4ia . Golder Associates July 1992 -37- 913-2403 5.4 permeability A total of eight laboratory permeability tests were performed in order to determine the vertical permeabilities of the geologic materials at the site. Of the eight tests, four were performed on relatively undisturbed, field preserved, core samples from the two weathered bedrock units. The remaining four permeability tests were performed on recompacted, remolded samples. All remolded samples were tested at approximately 95% compaction and 94% to 99% of optimum moisture content. Confining pressures representative of in-situ conditions were used on all samples. Confining pressure calculations were based on sample collection depth and local depth to groundwater. Table 5-2 summarizes the laboratory permeability test results. The approach to permeability testing of the bedrock materials was driven by the interbedded and interlaminated nature of the material. Since fine-grained materials (weathered claystones) are interbedded with coarser, silty fine sandstones and siltstones, and bedding is essentially horizontal, a difference in horizontal permeabilities versus vertical permeabilities was suspected. Therefore, the approach to permeability testing was to isolate the two main types of materials (coarse-grained and fine-grained) for discrete testing and additionally to test the two materials together. Values for permeabilities of the coarse-grained materials were obtained by one test on an undisturbed core sample from the Upper Weathered Bedrock and one undistributed core sample from the Lower Weathered Bedrock. Permeability values for these samples were 3x10'3 cm/sec and 2x10'3 cm/sec. The permeability values for the coarse-grained materials correlate well with the in-situ hydraulic conductivity values obtained by slug testing. Permeabilities for the fine-grained materials were obtained by one test of undisturbed core sample and four tests of remolded samples. The values obtained for these samples ranged from 3x104 cm/sec for one of the remolded Upper Bedrock samples to lx10'' for the undisturbed Lower Weathered Bedrock sample. 5121.96t Golder Associates July 1992 -38- 913-2403 A core sample containing both fine-grained and coarse-grained materials was tested in order to obtain a value for permeability of the two units acting together. The resultant value for this sample is 2x104 cm/sec. The relatively low permeability of this sample indicates that the fine- grained materials exert a pronounced influence on vertical permeabilities. Based on data provided by Industrial Compliance, 1991, the base of the landfill apparently rests on Upper Weathered Bedrock. Therefore, the permeability values for the Upper Weathered Bedrock unit have significant implications regarding potential contaminant migration. The permeability of these materials ranged from 3x115 cm/sec to 4x104 cm/sec. These are relatively low permeabilities and suggest that the Upper Weathered Bedrock unit would likely act as a significant bather to downward migration of contaminants. 5.5 Geochemical Characteristics Geochemical characteristics of geologic materials at the site were evaluated by Analytica Laboratory of Golden, Colorado for Cation Exchange Capacity (CEC) and pH. The CEC evaluation was performed to assess the contaminant attenuation potential of the Upper Weathered Bedrock and the Surficial Unconsolidated material. The evaluation of pH was performed in order to assess the CEC values as they apply to the site, since CEC is strongly dependent upon pH. An additional motivation for pH testing is a cursory assessment of the ability of the soil to act as a buffer to acid leachate drainage. 5.5.1 Cation Exchange Capacity The CEC of geologic material is a measure of the ability of that material to adsorb exchangeable cations. It can therefore be used as a measure of the ability to attenuate the migration of some contaminants, primarily inorganic contaminants, by adsorption of exchangeable cations. Clay minerals have, to varying degrees depending on the particular mineralogy, a high capacity to adsorb specific inorganic solutes because of large surface areas and numerous exchange sites. Golder Associates '�:—.. t July 1992 -39- 913-2403 In general certain metals including lead, cadmium, mercury and zinc are particularly susceptible to attenuation. Potassium, ammonia, magnesium, silicon and iron are moderately attenuated. Sodium is weakly attenuated. Divalent cations are generally more readily adsorbed than monovalent cations. Cations are more strongly adsorbed than anions. Conservative solutes such as chloride are not attenuated. CEC is typically reported in terms of milliequivalent per 100 grams of dry mass (meq/100g). In order to evaluate CEC and pH at the site, 5 samples were submitted for testing. Four of the samples were of the Upper Weathered Bedrock and one sample was of the Surficial Unconsolidated silty clay. Upper Weathered Bedrock samples were favored since base of solid waste is estimated to be typically within the Upper Weathered Bedrock unit. Two of the samples were from upgradient soil gas wells (SG-16, SG-20) and three of the samples were from downgradient soil gas wells (SG-3, SG-6 and SG-9). Table 5-3 presents the results of the CEC and pH analyses. Values for CEC range from 18.3 meq/100g to 37.3 meq/100g. Rased on these results, the materials at the site have the potential to attenuate the migration of inorganic contaminants. 5.5.2 Soil/Rock pH The same five samples submitted for CEC analysis were also analyzed for pH. The pH of material underlying the site has a direct bearing upon the CEC of the material. The laboratory procedure for CEC testing involves neutralizing the material (pH of 7.0). In a low pH environment a greater percentage of Hydrogen ions (H+) are present. These H+ ions limit the exchange sites available and therefore lower the CEC. The pH values reported for the Central Weld site range from 7.5 to 7.9. Since the reported pH values are close to neutral the CEC values reported by laboratory testing should closely mimic those relative to field conditions. The pH of a geologic material is an indicator of the alkalinity of the material which in turn governs the ability of that material to buffer acid leachate. The range of pH values reported (7.5 to 7.9) are just slightly basic. Golder Associates July 1992 -40- 913-2403 6.0 RESULTS OF WATER OUALITY ANALYSES Water quality samples were collected at the Central Weld site in March 1992 from eight shallow monitoring wells, seven deep monitoring wells, and three surface water sampling sites. Several quality assurance (QA) samples were also collected: a field duplicate, a field blank, a trip blank, and laboratory blanks. Procedures used to collect the field duplicate, field blank, and trip blank samples are described in Section 2.6. In addition, laboratory blanks were prepared and analyzed by the laboratory during sample analysis. • Laboratory blanks were prepared by the laboratory and were analyzed without leaving the laboratory. Laboratory blank samples were analyzed concurrently with field samples to provide an indication of contamination introduced at the laboratory. Analysis of laboratory blanks was sporadic. Several laboratory blanks were analyzed for a particular type of analysis (e.g., volatile organics), while no laboratory blanks were analyzed for other types of analyses (e.g., nutrients). This is typical for laboratory blanks and does not adversely impact the quality of the data. The samples were analyzed by Enseco/Rocky Mountain Analytical Laboratory in Arvada, Colorado. The following parameters were analyzed: ► Volatile Organic Compounds (VOCs); ► Pesticides and Herbicides; ► Trace Metals; ► Nutrients; ► Major Anions and Cations; and, ► Radionuclides and Radioactivity. Golder Associates 931.064 July 1992 -41- 913-2403 A discussion of the laboratory results is provided below. Laboratory analytical results are included in Appendix I. 6.1 Volatile Organic Compounds A total of 34 volatile organic compounds (VOCs) were analyzed in the water quality samples (Table 6-1). Of these, eight VOCs were detected in one or more of the samples. These are: ► Acetone; ► 1,1-Dichloroethane; ► 1,2-Dichloroethane; ► 1,2-Dichloroethee; ► 1,2-Dichloropropane; ► Methylene chloride; ► Trichloroethene; and, ► Tetrachloroethane. The volatile organic compounds that were detected and their concentrations are summarized in Table 6-2. VOCs were detected in five monitoring wells: GWMWir°2,-GWMWW1 GW9�,W,5, aLsi GWMW-5N, and GWMW-7. Alof these wells are completed in the shallow aquifer. With the exception of GWMW-2, each of these wells is located downgradient of the landfill. Monitoring well GWMW-2 is located upgradient of the landfill. Figures 4-1A and 4-1B show the location of the wells and the inferred direction of groundwater flow in the shallow aquifer. C E. IdcsP S ring fi r-'1: VOCs werellso detected in one of the surface water samples,LF UD collected from the outlet .. .. .� • w o,. of the landfill underdrain. tNo VOCs were detected in the surface water samples collected from 33106A Golder Associates tot 3l�iZ July 1992 -42- 913-2403 the steel culvert which drains the off-site area at the north property boundary (N-Discharge) and the inlet of the retention pond (RP-Inlet). VOCs were not detected in the field blank. Methylene chloride was detected in the trip blank and sample GWMW-7. Two VOCs were detected in the laboratory blanks: acetone, and methylene chloride. Both of these compounds are common laboratory contaminants. Acetone was detected in sample GWMW-2. Based on the laboratory and trip blank results, acetone and methylene chloride are present as a result of laboratory contamination and do not accurately reflect impacts from the landfill. Following is a list of detected volatile organic compounds, the range of concentrations at the site, and their corresponding drinking water standards: Range of State of Federal Compound Concentration Colorado Standard Standard (mg/1) (mg/1) (mg/1) 1,1-Dichloroethane <0.005 to 0.0059 N/A N/A 1,2-Dichloroethane <0.005 to 0.018 0.005'; 0.00042 0.005' 1,2-Dichloroethene <0.005 to 0.026 0.12 0.07' 1,2-Dichloropropane <0.005 to 0.0066 0.562 0.005' Trichloroethene <0.005 to 0.070 0.005'; 0.0052 0.005' Tetrachloroethene <0.005 to 0.210 0.0052 0.005' Standard shown for 1,2-dichloroethene is representative of cis-1,2-dichloroethene. State Standards 1: Colorado Drinking Water Standards, CCR Title 5 2: Colorado Ground Water Standards, CCR Title 5 Federal Standards 3: Currently applicable standard promulgated under the Safe Drinking Water Act, 40 CFR 141 4: Safe Drinking Water Act Standard to become effective on July 30, 1992. 33106 ti Golder Associates July 1992 42- 913-2403 the steel culvert which drains the off-site area at the north property boundary (N-Discharge) and the inlet of the retention pond (RP-Inlet). VOCs were not detected in the field blank. Methylene chloride was detected in the trip blank and sample GWMW-7. Two VOCs were detected in the laboratory blanks: acetone, and methylene chloride. Both of these compounds are common laboratory contaminants. Acetone was detected in sample GWMW-2. Based on the laboratory and trip blank results, acetone and methylene chloride are present as a result of laboratory contamination and do not accurately reflect impacts from the landfill. Following is a list of detected volatile organic compounds, the range of concentrations at the site, and their corresponding drinking water standards: Range of State of Federal Compound Concentration Colorado Standard Standard (mg/1) (mg/1) (mg/1) 1,1-Dichloroethane <0.005 to 0.0059 N/A N/A 1,2-Dichloroethane <0.005 to 0.018 0.005'; 0.00042 0.005' . uo s 1,2-Dichloroethee <0.005 to 0.026 0.12 0.07` •O3l 4 1,2-Dichloropropane <0.005 to 0.0066 0.562 0.005k -cIt Trichloroethane <0.005 to 0.070 0.005'; 0.0052 0.005' Trichhs eel ene <0.005 to 0.210 0.0052 0.005k ,sue rtandar shown for 1,2-dichloroethene is representative of cis-1,2-dichloroethene. State Standards 1: Colorado Drinking Water Standards, CCR Title 5 2: Colorado Ground Water Standards, CCR Tide 5 Federal Standards 3: Currently applicable standard promulgated under the Safe Drinking Water Act, 40 CFR 141 4: Safe Drinking Water Act Standard to become effective on July 30, 1992. • 921.061. Golder Associates July 1992 -43- 913-2403 Based on the information presented above, the maximum detected concentration of 1,2- dichloroethane, 1,2-dichloropropane,tichloroethene,and tetrachioroethene exceeds either a State of Colorado or federal standards. The maximum concentration of each of these compounds was exhibited by shallow groundwater on the downgradient site of the landfill in monitoring wells MW-4, MW-5, or MW-5N (Table 6-1). All detected concentrations of 1,2-dichloroethene are below State and federal standards. No standards have been established for 1,1-dichloroethane. 6.2 Pesticides and Herbicides The water quality samples were analyzed for four pesticides (Endrin, Lindane, Methoxychlor, and Toxaphene) and two herbicides (2,4-D and 2,4,5-TP (Silvex)). No pesticides or herbicides were detected in any of the water quality samples analyzed. 6.3 Trace Metals Ten trace metals were analyzed in the water quality samples: arsenic, barium, cadmium, chromium, iron, lead, manganese, mercury, selenium and silver. Of these, five trace metals (barium, cadmium, chromium, iron and manganese) were detected in one or more of the samples. The detected concentrations for these trace metals are summarized in Table 6-3. The following paragraphs discuss the five detected trace metals. Barium, iron, and/or manganese were detected in seven of the nine shallow monitoring wells and a in each of the deep monitoring wells and surface water sample actinium and ohmmrum were only detected in One—sample,-which was collected from deep monitoring wel1,Ga2. This appears to be an isolated occurrence. No trace metals were detected in the field blank or in the laboratory blank analyzed for this set of samples. As is typical, the trip blank sample was not analyzed for metals. Golder Associates 9 1061 July 1992 -44- 913-2403 Barium concentrations ranged from <0.010 to 0.043 mg/1. There was no significant difference between the concentration of barium in the shallow and deep monitoring wells or between upgradient and downgradient sampling sites. This suggests that barium detected in the samples is originating from natural, geologic sources. The detected barium concentrations were all below the current primary drinking water standard of 1.0 mg/1 established by the EPA and the State of Colorado. Iron concentrations ranged from <0.10 to 0.87 mg/1. The secondary standard for iron established by the EPA and State of Colorado is 0.3 mg/1. Iron was only detected in the deep monitoring wells and the surface water samples. The presence of iron in the deep monitoring wells but not the shallow monitoring wells suggests that groundwater in the deeper aquifer is chemically under reducing (anaerobic) conditions whereas groundwater the shallow aquifer is under oxidizing (aerobic) conditions. Iron is nearly insoluble in waters that are oxygenated and not acidic but can be quite soluble in near neutral or basic waters that are void of oxygen. Field water quality measurements indicated that groundwater from both the shallow and deep aquifers at the site is, in fact, near neutral or basic. The presence of iron in site surface waters, expected to be well aerated and therefore insoluble to iron, is probably explained from particulates entrained in the samples during collection. Surface water samples for trace metals were not filtered when collected which could explain the source of particulate matter in the samples. Any iron in the particulates would have become dissolved into the water during sample preservation. Manganese concentrations ranged from <0.010 to 1.7 mg/l. The secondary standard for manganese established by the EPA and State of Colorado is 0.05 mg/1. Manganese was detected in the surface water samples, the shallow monitoring wells, and the deep monitoring wells. Concentrations of manganese were generally higher in the deep monitoring wells. In fact, the maximum detected concentration of manganese was exhibited by deep monitoring well GWMW- 8, located on the upgradient side of the landfill. Geochemically, manganese behaves very similar to iron. This probably explains the difference in manganese concentrations between the deep and shallow aquifers. 'j-. a ..w 4 c o o ,+ 0 " Co- w.'„i M 4 & r o w %.� ,«. Q (A) R1 kA)— 'a. Golder Associates R3106.1 July 1992 -45- 913-2403 6.4 Nutrients Two common nutrients, nitrate and ammonia, were analyzed in the water quality samples. Nutrient concentrations are summarized in Table 6-4. Ammonia was detected in six of the seven deep monitoring wells but in none of the shallow monitoring wells or surface water samples. Ammonia is a common groundwater constituent in areas of agricultural activity. Ammonia is chemically unstable in water under oxidizing conditions common in surface waters and shallow aquifers. This may explain why it was not detected either in the site surface waters or in the shallow aquifer. The presence of ammonia in groundwater from the deeper aquifer suggests that this aquifer is under reducing conditions and may be impacted by agricultural activities upgradient of the landfill. There is currently no EPA or State of Colorado standard for ammonia. Nitrate was detected in all but one of the samples and ranged in concentration from 0.11 to 18.5 mg/1 as N. Two samples (GWMW-2 and N-Discharge) exceeded the EPA and State of Colorado drinking water standard for nitrate of 10 mg/1 as N. Monitoring well GWMW-2 is completed upgradient of the landfill in the shallow aquifer and surface water sampling site N-discharge is located along the northern landfill boundary adjacent to agricultural land. Nitrate levels were consistently higher in the shallow monitoring wells and surface water samples than the deep monitoring wells, suggesting that nitrate is originating from agricultural activities near the landfill. This interpretation is consistent with the finding of Industrial Compliance, Inc. (1991). Neither nitrate nor ammonia were detected in the field blank. The trip blank was not analyzed for nitrate or ammonia. 6.5 Major Anions and Cations The following major anions and cations were analyzed in the water quality samples: calcium, magnesium, potassium, sodium, alkalinity (bicarbonate and carbonate), chloride, and sulfate. Golder Associates 931061 July 1992 -46- 913-2403 The results of these analyses are presented on a trilinear diagram on Figure 6-1. Sample concentrations are designated on the diagram as a percentage of the total cation and anion concentrations measured in each sample. Note that the samples have been divided into three general groups based on their source: surface water, shallow monitoring wells and, deep monitoring wells. The position of the samples on the trilinear diagram indicates that all of the samples have similar chemical signature and probably cannot be distinguished based on their major anion and cation data alone. Based on the predominant cation and anion measured, the samples classify as either calcium-sulfate or magnesium-sulfate waters. Most of the samples exceeded the secondary drinking water standard for sulfate of 250 mg/1. 6.6 Radionuclides and Radioactivity Two radionuclides (Radium 226 and 228) and two measures of radioactivity (Gross Alpha and Gross Beta) were analyzed in each of the water quality samples. The results of these analyses are summarized in Table 6-5. Two samples exceeded the EPA and State of Colorado drinking water standard for combined Radium 226 and 228 of 5 pCi/1. Both samples were collected upgradient of the landfill, one from shallow monitoring well GWMW-3 and the other from deep monitoring well GWMW-10. Combined Radium 226/228 activities for the other samples ranged from 0.3 to 4.9 pCi/1 and averaged 2.0 pCi/1. There was no significant difference between the activities of groundwater samples upgradient and downgradient of the landfill, suggesting that the landfill does not act as a source of radioactivity. Fifteen of the eighteen groundwater and surface water samples exceeded the EPA and State of Colorado drinking water standard for Gross Alpha activity of 15 pCi/i. Gross Alpha activities ranged from 11 to 180 pCi/1 and avenged 49.3 pCi/1. The highest activities were measured in Golder Associates 201061 July 1992 -47- 913-2403 the shallow monitoring wells. It should be noted that there was no significant difference between the activities of groundwater samples upgradient and downgradient of the landfill, suggesting that the landfill does not act as a source of radioactivity. Gross Beta activities ranged from 0.0 to 71 pCi/I and avenged 33.8 pCi/1. Similar to the Gross Alpha results, Gross Beta activities were generally higher in the shallow monitoring wells than the deep monitoring wells with no significant difference between upgradient and downgradient wells. A standard for Gross Beta has not been established by the EPA or State of Colorado. The source of radionuclides and radioactivity in the samples appears to be natural and is probably related to native geologic materials occurring beneath the site. Overall, there was no significant difference between sample activities upgradient and downgradient of the landfill. Low activities of Gross Alpha (0.8 pCi/1) and Gross Beta (1.6 pCi/i) were detected in the field blank. The trip blank was not analyzed for radionuclides or radioactivity. No laboratory blanks were analyzed for radionuclides or radioactivity. Golder Associates " 1161. July 1992 -48- 913-2403 7.0 VALIDATION OF ANALYTICAL DATA The analytical data reported by Enseco/Rocky Mountain Analytical Laboratory were validated by Golder to determine the quality of the results. The following items were evaluated as part of the laboratory data validation: • Sample Preservation and Holding Times; . Instrument Calibration and Tuning; • Blank Sample Results; . Surrogate Recoveries; • Control Sample Recoveries; and, • Field Duplicates. The results of this evaluation are discussed below. 7.1 Sample Preservation and Holdinz Times Preservation and holding time requirements were satisfied for all samples submitted to the laboratory with the following exceptions: • Herbicide samples from five monitoring wells, two surface water sites, and the equipment blank were not analyzed within the required holding times. As per WMC instruction, the seven field sites and an equipment blank were resampled for herbicides on April 27 and 28, 1991. The second set of herbicide samples collected was analyzed within holding times limits; • Duplicate VOC samples from monitoring well GWMW-5N were analyzed outside holding time limits. A comparison of the laboratory results indicated a problem with the preparation of one of the samples. The laboratory therefore reanalyzed the samples and presented these results in its final report. The reanalysis of the VOC duplicates was performed sixteen days past the holding time limit. The analytical laboratory believes that analysis of these samples past the holding time limit has not significantly affected the results. Golder Associates :t.1.06iw July 1992 -49- 913-2403 I. Holding times for nitrate were exceeded for samples GWMW-5, GWMW-9 and GWMW-12 by approximately one day. The holding time limit for nitrate in water samples is 48 hours; and, . Metals samples from monitoring wells GWMW-5, GWMW-9 and GWMW-12 were not preserved in the field due to insufficient preservative provided by the laboratory. Preservative was added to these samples when received at the laboratory. 7.2 Instrument Calibration and Tuning Calibration of laboratory analytical equipment is vital in ensuring that the instruments are capable of producing acceptable quantitative data. Tuning further ensures acceptable instrument sensitivity. Laboratory reports provided by Enseco/Rocky Mountain Analytical were reviewed to verify that the results of instrument calibration and tuning were acceptable. As indicated by the laboratory, all calibration and tuning results were acceptable for the samples analyzed for this project. 7.3 Blank Sample Results Blanks are used to detect sample contamination introduced from the following possible sources: (1) Background compound concentrations in the air at the sampling sites; (2) Unclean sampling equipment; (3) Unclean sample containers; (4) Unclean laboratory instruments; and, (5)Background compound concentrations in the air at the laboratory. Field, trip and laboratory blanks were analyzed for this project. A field blank was prepared in the field by passing laboratory-grade deionized water through decontaminated sampling Golder Associates 931961. July 1992 -50- 913-2403 equipment and collecting the water in sample containers. Analysis of the field blank will potentially detect contamination from each of the five sources listed above. Methylene chloride, gross alpha, and gross beta were detected at low concentrations in the filed blank sample. One trip blank was prepared in the laboratory by filling VOC containers with deionized water at approximately the same time and location that the sample containers used for sampling were prepared. These containers remained with the sample bottles while in transit to the site, during sampling,and during the return trip to the laboratory. At no time during these procedures were the containers opened. Analysis of the trip blank will potentially detect contamination from sources (3) through (5) listed above. VOCs were not detected in the trip blank sample. Laboratory blanks were prepared in the laboratory during the period that the field samples were being analyzed. Analyses of the laboratory blanks will potentially detect contamination from sources (4)and (5) listed above. Two VOCs were detected in the laboratory blank samples: acetone and methylene chloride. Each of these compounds is a common laboratory contaminant. No herbicides, pesticides or metals were detected in any of the blank samples. 7.4 Surrogate Recoveries Surrogate compounds are added to field samples prior to analysis in the laboratory to identify potential sample matrix interferences and to evaluate the accuracy of the analytical results. Known concentrations of these compounds are used and their recoveries are measured during sample analysis. If the recovery of the surrogates falls significantly outside of established limits for the laboratory method, the accuracy of the sample results could be in question. Golder Associates 931.061 July 1992 -51- 913-2403 Samples for VOCs, herbicides and pesticides were spiked with surrogate compounds. All surrogate recoveries were within limits indicating that there were no significant matrix interference problems and the analytical results are relatively accurate. 7.5 Control Sample Recoveries Analysis of control samples provides an additional measure of the accuracy of the sample results. Unlike surrogates, however, the compounds used to spike control samples are identical to those being analyzed in the field samples. Known concentrations of these target compounds are added to laboratory-prepared solutions and sample splits are generally taken. Analysis of control sample splits provides an additional measure of the precision of the laboratory method being used. Recoveries of compounds added to the control samples should fall within limits established by the laboratory method. The relative percent difference (RPD) between the control sample duplicate results should also not exceed established levels. Control samples were analyzed for VOCs, herbicides, pesticides, metals, major anions and cations, and nutrients. Recoveries and RPDs for all of the control samples were within or slightly outside of established limits. 7.6 Field Dunlirates Field duplicate samples are collected and analyzed as an indication of the combined precision of the field sampling procedure and the laboratory analyses. The relative percent difference (RPD)between duplicate sample results is calculated and used to quantify the degree of sample precision. Low RPDs indicate a high level of precision and high RPDs poor precision. RPD values are generally not calculated when the compound concentration for one or both of the duplicate samples is below the detection limit. Golder Associates 93.1.961. July 1992 -52- 913-2403 Duplicate samples were collected for this project from monitoring well GWMW-5N. A comparison of the duplicate sample results indicated, overall, an acceptable level of sample precision. The highest RPD values (37 and 43%) were reported for the radioactivity and radionuclide analyses. According to the laboratory, precision for these parameters is generally not high due to the analytical methods used. RPDs for the other parameters analyzed ranged from 0 to 13%, indicating a good to high level of precision. Golder Associates a 1.061. July 1992 -53- 913-2403 8.0 SUMMARY AND CONCLUSIONS This"Hydrogeologic and Geotechnical Characterization Report"was prepared to provide Waste Services Corporation(WSC)with a comprehensive evaluation of the geology,hydrogeology,and geochemical conditions at the Central Weld Sanitary Landfill. The information presented in this report will be the basis for developing environmental monitoring systems for groundwater, surface water, and landfill gas. The remainder of this section presents summaries and conclusions regarding site conditions. 8.1 Geology Three geologic units have been identified at the site. They are herein referred to as the Surficial Unconsolidated Unit, the Upper Weathered Bedrock and the Lower Weathered Bedrock. The Surficial Unconsolidated Unit is an eolian silty clay to clayey silt which ranges in thickness from a few feet to nearly 30 feet. The Surficial Unconsolidated Unit exhibits considerable lateral and vertical homogeneity. The Upper Weathered Bedrock is comprised of interlaminated and interbedded silty fine sandstone and claystone. The unit is typically yellowish brown, is poorly indurated and varies laterally across the site. The thickness of the unit ranges from approximately 40 to 70 feet. The Lower Weathered Bedrock is comprised of interlaminated and interbedded, medium to dark grey, silty fine sandstone and claystone. The unit is slightly less weathered than the Upper Weathered Bedrock. Thickness of the Lower Weathered Bedrock was not determined as part of this study. Golder Associates 9:17,1.061. July 1992 -54- 913-2403 8.2 $ydrogeoloev Three saturated zones, a perched zone, a shallow groundwater zone, and a deep groundwater zone, were encountered in this study. Each is discussed below. Perched Zone A perched zone is inferred to exist east of the diversion trench along the northeastern perimeter of the site. The perched zone rests on top of a claystone unit and receives recharge from irrigation. The irrigation results in seasonal water level rises of a few feet in the perched water. Irrigation does not occur on the landfill. Therefore, perched waters are not evident within the landfilled areas. Shallow Saturated Zone The shallow saturated zone occurs near the top of the Upper Weathered Bedrock. Direction of flow in the shallow saturated zone is to the south-southwest. The average horizontal gradient across the site is approximately 0.03 ft./ft.. Average horizontal groundwater flow velocity is approximately 95 feet per year. In one localized area, the shallow saturated zone extends above the base of the landfill. This is evidently the result of infiltration through the diversion trench which extends along the northern boundary of the landfill. The saturated refuse may be an avenue for contaminant migration into the shallow groundwater system. Deep Saturated Zone The deep saturated zone occurs within the lower portion of the Upper Weathered Bedrock and the upper portion of the Lower Weathered Bedrock. Direction of flow is to the south-southeast. Gelder Associates rA inn di •k 1,0 July 1992 -55- 913-2403 The average horizontal gradient across the site is approximately 0.02 ft./ft.. Average horizontal groundwater flow velocity is approximately 11 feet per year. During drilling, a relatively dry zone approximately 5 to 10 feet thick was generally noted between the shallow groundwater and the deep groundwater. The presence of the dry zone suggests that the degree of communication between the shallow and deep groundwater systems is minimal. Vertical Groundwater Flow Downward vertical gradients exist at the shallow/deep well pairs across the site except near Sportier Lakes where weak downward to slightly upward gradients have been calculated. Apparently the lakes are locally contributing a constant head recharge to the groundwater. 8.3 Water Ouality Water quality samples were collected from all of the groundwater monitoring wells and from three surface water sampling points. The following parameters were analyzed: Volatile Organic Compounds (VOC); ► Pesticides and Herbicides; • Trace Metals; Nutrients; ▪ Major Anions and Cations;and, ▪ Radionuclides and Radioactivity. Volatile organic compounds were detected in four downgradient shallow groundwater monitoring wells (GWMW-4, GWMW-5, GWMW-5N and GWMW-7), upgradient monitoring well GWMW-2, and in the surface water sample from the landfill underdrain (LF-UD). The only VOC detected in GWMW-2 was acetone, which is presented as a result of laboratory Golder Associates 9x,1.96'. July 1992 -56- 913-2403 contamination. The maximum concentration of volatile organic compounds in the downgradient monitoring wells generally exceed EPA or State of Colorado standards. VOCs were not detected in any deep wells. No pesticides or herbicides were detected in any of the water quality samples analyzed. Four trace metals(barium,cadmium, iron and manganese)were detected in one or more of the samples. In general, no trend was observed for occurrence of metals with respect to shallow versus deep wells or upgradient versus downgradient wells. The presence of iron in the deep monitoring wells but not the shallow monitoring wells suggests that water in the deeper saturated zone is chemically under reducing(anaerobic)conditions whereas water in the shallow saturated zone is under oxidizing (aerobic) conditions. Ammonia was detected in six of the seven deep wells but none of the shallow wells. The presence of ammonia in the deep wells is another indication of anaerobic conditions in the deep saturated zone and suggests that a source of ammonia exists upgradient of the landfill. Nitrate was detected in all but one of the water quality samples. The detection of nitrate in upgradient as well as downgradient wells suggests an agricultural source. The water quality samples classify as calcium-sulfate to magnesium-sulfate based on the analysis of major anions and cations. Fifteen of the eighteen groundwater samples exceed the EPA and State of Colorado drinking water standard for Gross Alpha activity. Two samples exceed the EPA and State of Colorado drinking water standard for combined Radium 226 and 228. The source of radionuclides and radioactivity appears to be natural and related to geologic materials occurring beneath the site. Golder Associates 931061. July 1992 -57- 913-2403 The water quality results discussed above suggest that the landfill has contributed volatile organic compounds to the shallow saturated zone and the landfill underdrain. Concentrations exhibited by an off-site (approximately 15 feet from the landfill boundary), downgradient, shallow monitoring well (GWMW-5) suggest that volatile organic compounds have migrated off-site. Based on other analytical data collected as part of this study, the landfill does not appear to be a significant source of metals, pesticides, herbicides, nutrients, major anion and cations, or radionuclides. The deeper groundwater system has apparently not been adversely impacted by the landfill operations but has evidently been impacted by upgradient activities. Upgradient groundwater sample results for nitrate, sulfate, radionuclides, and radioactivity indicate that the shallow groundwater near the landfill does not meet drinking water standards due to naturally occurring conditions or upgradient impacts. However,two downgradient water 4/ wells are permitted by the State of Colorado to withdraw shallow groundwater for domestic or stock use. These two wells represent potential receptor points for volatile organic compound migration via shallow groundwater. The following section presents recommendations for upgrades to site operations and additional investigative activities based on the data presented in this report. Golder Associates 924061 July 1992 -58- 913-2403 9.0 RECOMMENDATIONS Based on the information presented in this report, the following recommendations are made to upgrade the site operations and to further define the site hydrogeological and geochemical conditions: • The design of the unlined portion of the diversion trench located along the northern boundary of the site should be revised to prevent continued recharge to the shallow aquifer system. �- • The extent of off-site volatile organic compound migration south of the landfill should be delineated. • The current use of the downgradient water wells south of the landfill should be determined through interviews with well owners. * . Surface water in Spomer Lakes should be sampled to determine if discharge from the landfill underdrain is measurably impacting the lakes. Shallow monitoring wells along the southern portion of the landfill should be resampled to provide a larger database and to confirm the results of the Golder investigation. ► The potential impacts from upgradient irrigation activities should be defined through quarterly sampling of all monitoring wells. • • Seasonal water level changes should be determined through quarterly monitoring of water levels in all monitoring wells and soil gas probes. ► The extent of saturated refuse in the northern portion of the landfill should be determined through installation of additional piezometers. Golder Associates Hello