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Home My WebLink About20021907.tiff APPENDIX C Monitor Well Construction Information 2002-1907 -'�GROUNDWATER TECHNOLOGY chen and associates CONSULTING GEOTECHNICAL ENGINEERS IS SOWN ZUNI STREET•DENVER.COLORADO 80723•303/764.7105 May 6, 1983 Subject: Volume of Fluids in — Screwed Settlement Pond, Weld County Disposal, Inc., County Roads 35 and 12, Weld Cc arty, Colorado. Job No. 25,680 Mr. Guy Harvey Weld County Disposal, Inc. P.O. Box 897 Pampa, Texas 70965 Dear Mr. Harvey: As requested, we visited the subject site on May 4, 1983 to evaluate the volume of fluids in the screened settlement pond., The fluid depths _ were measured at 61 points within the pond. The resultant fluid depth isopach map is presented on Fig. 1. Based on this map, the fluid volume is extimated to be 1.36 million gallons. Also, as requested, we sampled the fluid at depths of 0.5, 4, 6, 8 and 9 feet. These sauples were given to a representative of Weld County Disposal, Inc., who determined the basic sedinent and water content of the samples. The basic sediment and water contents provided by Weld Canty Disposal, Inc. are: Death (feet) Percent Basic Sediments and Water 0.5 10 4 24 6 28 8 38 9 50 If there are any questions, please let us know. Sincerely, CHEN AND ASSOCIATES, INC. By Marcus J. Pardi, P.E. Rev. By: DHA MJP/ram Enclosure cc: PSM Engineering Attention: Mr. Daig Hammond OFFICES: CASPER • COLORADO SPRINGS • GLENWOOD SPRINGS • SALT LAKE CITY chen and associates 4 CONSULTING GEOTECHNICAL ENGINEERS IS SOUTH ZUNI STREET•DENVER.COLORADO S0223•20317•AVI0S May 17, 1983 Subject: Groundwater Monitoring Wells and Water Quality Data, Weld County Disposal, Inc. , County Roads 12 and 35, Weld County, Colorado. Job No. 25,680 Mr. Guy Harvey weld County Disposal, Inc. P.O. Box 897 Pampa, Texas 70965 Dear Mr. Harvey: This letter presents the results of the installation of three groundwater monitoring wells and water quality data for six wells and two evaporation ponds at the subject site. The site is shown on Fig. 1. The _ work was conducted in accordance with our proposal to Weld County Disposal, Inc., dated November 18, 1982, m o repast dated il13,Mr•19Derrand additional requests by the anagerf the disposal facity, _ McKnight. Monitoring Wells: The three additional wells designated MW-4, MW-6 and MW-7, in keeping with previously numbered wells, are slx;un on Fig. 1. MW-6 and MW-7 were drilled on April 6, 1983, accordance e screened wath our seoriginal tlem�l proposal to evaluate the water quality adjacent to pond. MW-4 was installed on May 11, 1983, in accordance wth i he e general y ral requirements of the Weld County Health Departuen as lat McKnight. Graphic logs of the monitoring wells are presented on Figs. 2 and 3. Generally, the subsoils consist of silty sand fill overlying undisturbed natural silty sand soils, which are underlain by silty sandy clay at Wells MW-6 and W 6 The clay was respectively, and eed xtedepths d t to of 26 and 7-1/2 the bottom of eacheet in hole. Wells MW-6 and MW-7, respec Y. This clay material was not encountered in MW-4. The free water levels encountered at the time of the well installations are shown on Figs. ed _ and 3. Two-and-one-half inch diameter perforated plastic pipe was p in the 4-inch diameter auger holes drilled for M",'-6 and MA'-7. Six-inch diameter perforated plastic pipe was installed a 12-inch o c the water ameter auger hole drilled for MW-4. This casing was perforated and the 3-inch annulus backfilled with coarse sand and fine gravel. A bentonite pellet seal was installed for appr el backfilled with 3 feet above the eperforation zone. Tile remaining section of drill cuttings consisting of silty sand. . nn,nonnn cOPINfG . f-I FNWOOD SPRINGS • SALT LAKE CITY May 17, 1983 Mr. Guy Harvey Page 2 Water Sampling: Samples of water were obtained from Wells MW-1, MW-2, MW-3, MW-5, MW-6 and MW-7. Water was also obtained from Evaporation Ponds A and B. Samples were tested for sodium, nitrate, chloride, total dissolved solids, pH, calcium, sulfate, hardness and oil and grease. The water quality data is shown on Table I. Also shown are the mandatory or suggested maximum concentration limits. Conclusions: The general conclusions drawn from the available water quality information at this time are that the groundwater in Wells MW-6 and _ MW-7, as well as Ponds A and B, show very high levels of sodium, chloride, total dissolved solids and oil and grease. A sample of oil brine water was taken from near the surface of the screened settlement pond. However, this sample contained virtually all oil and therefore, the other consitituents were not evaluated. Based on the amount of oil in Well MW-6, it appears the screened settlement pond may be leaking. Oil concentrations in the remaining wells are above suggested minimum levels and may indicate this leakage is sanewhat extensive throughout the entire site. The oil may also be entering the subsoils due to seepage from some of the evaporation ponds on which oil slicks are frequently present. During the process of this investigation, Pond B was reclaimed by filling with on-site silty sand material. The drainage and subsequent filling of this pond was not observed by our firm. _ If there are any questions concerning this letter or if we may be of further service, please let us know. Sincerely, CHEN AND ASSOCIATES, INC. By Marcus J. Pardi, P.E. Rev. By: DHA MJP/ram Enclosures cc: Mr. Janes W. Smith Attorney, Inc. chen and associates, inc. -- CONSULTING ENGINEERS- -- - 303/744-7105 - SgIiF WINDAiION 96 5.ZUNI DENVER, COLORADO 80223 ENGINEERING -_ . . . _ .INVOICE FOR PROFESSIONAL SERVICES To: Weld County Disposal, Inc. May 25, 1983 I PO Box 897 . j Pampa TX 70965 Attn: Mr. Harvey- i Job No. 25.680 , Invoice No. 838 _ 1. Weld County Disposal, Inc, County loads 35 and 12, yield County, Colorado Task I: Proposal of 11/18/82 and Progress Report, and Proposal of 4/13/83._ - Drilling 1 Hour a 70.00/hr. $ - 70.00 Drill Rig Mileage 60 Miles @ 1.60/mi. ' 11 Beasts @ 27.00/hr. 257.00, Field Engineer 592.00 Laboratory Water Analysis 1.5 }burs @ SS.Oi,/hr. 82.50' Project eer 36 Hours E 45.00/hr. . 1,620.00 Project Engineer 2 Hours a 19.00/hr. '. 38.00 Draftsmen " 155 Mlles .@ .30/mi. _ 46.50 - Mileage Subtotal $2,842.00 - - Proposed Maxims $2,400.03 Amount Due - Subtotal $2,400.00 Task II: Fluid Volume Festinate of 5/6/83 -- 10 Hass @ 27.0C/hr. $ .270.80 _ . Field Engineer 4 hours 40.00/hr. 168.00- Staff Engineer Project Engineer nr 4 Hours c 45.OUlrr. 180.00 - SS.Uu _ Sr. Project Engineer 1 }bur @ 55.00/hr. 55.00 Draftsmen 2 Hours d 19.00/hr. 18.00 Mileage 60 Miles E .30/mi. Subtotal 7--71.7.7517. — Task III: Sup?lemental hell Installation of 5/11/83 $ 405.00 Drilling 52.75 eidg 6.5 Hours @ 27.00/hr. 175.50 Field - t. E give 90.00 - Prc Project. Engineer 2 Hours 45.00/hr. Staff Engineer 1 .5 hours E' 40.0u/hr. _ 60.00 Draftsmen 1 .5 Yours N 19.00/hr. 26.50 uG miles l .3U/mi. 18.00 -Mileage Subtotal $ 625.'5 Task IV: Meeting Attendance 5/19/83 Sr. Project Engineer 5 Hours e 55.0u/hr. $ 275.00 106 i-iiles e .30/I 1 mileage Subtotal S iu5.Uu _ ItT.NsL 54,265.25 _ . Less Retainer (500.00) Respectfully submitted, i rf J.T DUE :r.),7cs.v OFFICES:COLORADO SPRINGS • GLENWOOD SPRINGS, COLORADO • CASPER,WYOMING • SALT LAKE CITY,UTAH C 11 \ 10 , j; I II \( 1 III I '; III ! i N 41 m j VI G L m 3 T J C u C m C i0 a) v 0 v L u ' W L L al III J ry Y 3 E u v a. 3 3 0 0 m O L e. L C C 3 3 3 U. 3 a) T — C C L U N m W 1333 - N011VA313 -- � v u as C •u C m L C• a L 3 v C e+Y 1 ) I I I U em. 3 L O CO o V\ 0 UN 0 L C 4) N — o al T co en a+ > m 3 O•.. .— •r in — C N n ca v — — m •a ?' 41 0 — ' 3 Q W m v v 0 — u — Z v — .— C .0 3 L 0. z .3 • 3 m U — C 01 u Q Q C X m 3 C -o '— L • 4- ..o C O 3 L C 0 O S 0. .0 L _, m v r a 0 ra U C d 0 U. ,_ L C al O n 0 L 3 O • u V1 3 3 m I C en m• 0) m 'n a. 1p m E J 1.. ' _ _ m E c oO C L C " 3 I o 4) 304) 0 .4) 3 L N — a) .C CCs m . u V • 3 C a) N 3 • v N m E L C 3 _ 13 — N m y la v O La - as o L = _ 0 Q 3 0 3 m y o 3 0. T f p T - L T v 01 C U - L 0 a) U m c c y .+ E _ L Q . v � ` i L U . 4_40 a _ _ : E U' 44 3 ' in o1 C a% O Cn 3 E' VC > > - A E v1 E u- a el 3 0 Q 0) u- C C 0) a' -0 01 L. I �n ( 3 L e0 v 0 0 'L L a v 3 v v O as u1 S 0 a u C Ill n� :• Z.:•e i \ C O N C L a) V1 m m m \,� C. CC 0 m - 3 0) E 3 it L 0 0 •- E c C •- a! — V a) Z • Out 1 C RI C E t — 0 co ..C 1V - 01 m 3 > V L LL- ... v 0L 0 — O 0 N 0) .0 0 .0 a 3 C L N Z L. J u1 W .0 I- a. I-- m 1n - O W I- l- 0 .L.V O_ is II 3 3 — C .. O 1- a m • U L en 4) 0. v a a O T C U U — C L a L 0 Z o1 m 1n .0 L ' • d u 10 N' N 0) u u 3 N u Cls E in I c E' u N >. v c I U — — v a. L L - O > 4) a in - UN gri 3 T • T •- `. Jt C .- 3 3C VI • 3 777 y \ L C m y t u ) in 0 U • / W I in to u N O / T3 M N in ..........71/1 C •41 41 N 1v .. u 3 — 3 L. v \ W N Y • 3 N Q r m3 — v 1` c aV 3 a u Q y 0 )n o I n o 0 m m CO CO b I I 1 1 l a is a 1333 - NOI1VA313 a a to 03 .o 1 % N • +3, 6" Drill Cuttings m - N Bentonite Seal • ' . a — — N Coarse sand - fine gravel Existing silty sand fill N _ and natural soils. _ o o _ Let — d f 12" • 25,680 chen and associates, Inc. WELL COMPLETION MW-4 Iris. 3 £ £ VI In UI to Cl) L 04 10 ZLaI-" 0 0 0 0 I 1 0 0 HI� O � � N to£r N .4N LA Z U7 N i O .] I I cn £ tn co N a to O LA 0 U1 O N N 00 0 N N CO N HI rl CO3 HI - 10 O Ln 00 - N a 01 H O 01 • 0 0.--I • v1 .-4O 0 N 0 .i t+1 r t0 N. 01 <' N .--I1 CO CO '-I HI 0 N : 0 d' 0 0 1.11tr 0 I NCI H 10 r-d t. N T N N N 0 NO HI tl1 N . I H d' . Fd.. 0 N I LA .--I m 0 N 03 Lfl Al N N N 0 y N ar O r-1 01 H xO'1CI 40 H- C21 3 U1 0 N 0 0 NO CO0 0 0 I M O N HI HI O1 H M J+ 1 VI 4 C M O rn N 0 a. N Ln 5 U1 I� I -1 m .-1 N N 0 m N tp 111 C N C•1 N .I U 9 w 0 O O 44 A a N N I 00 N. N 01 N NO 00 0 A Q S3 N el t•1 r 4 m t0 La] r1 I HI I L O Ol CO • '2 Hi 0 m fO 111 0 0 0 Hi 1A N N C` 10 1O A C 3 N Hi O H Col V' H 0Y p1 a' �1 �1 a Qf p1 a Z E a' a a F. E E C 12 O 0 co oo co 11 co O y cri £ C £ E• H N 6 Z .a ag. E. CO APPENDIX D Groundwater Investigation - Chen and Associates March 28, 1984 `GROUNDWATER TECHNOLOGY • chen and associates CONSULTING GEOTECHNICAL ENGINEERS 16 SOUTH ZUNI STREET• DENVER.COLORADO 10233• Ro3/7•4.7105 • GROUNDWATER INVESTIGATION COLORADO DISPOSAL SYSTEMS, INC. COUNTY ROADS 12 ARID 35 WEST CF HUDSON WED COUNTY, COLORADO • • PREPARED FOR: na3CWO.ti^'".-'. PROPERTIES, INC. 6243 INTERSTATE HIGHWAY 10 SUITE 670 SAN ANTONIO, TEXAS 76201 • JOB NO. 1 417 84 MARCH 26, 1984 ORFICES: CASPER • COLCR ACC SPRINGS • GLENWCOC. SPRINGS • SAL' L AvE C.�. TABLE OF CONTENTS INTRODUCTION 1 FIELD INVESTIGATION 2 PREVIOUS RESULTS 6 ANALYSIS OF DATA 10 RECOMMENDATIONS 13 FIG. 1 - COLORADO DISPOSAL SYSTEMS, INC. 3 TABLE I - RESULTS OF CHEMICAL ANALYSIS 5 TABLE II - RESULTS OF CHEMICAL ANAYSES, POND WATERS 7 TABLE III - RESULTS OF COMICAL ANALYSES, TRDSTELL WELL S TATA F 1V - PERCENT DISTRIBUTION C€ SALTS IN WATER SAMPLES 9 INTRODUCTIa The Colorado Disposal Systems, Inc. system of evaporation ponds near Ft. Lupton, Colorado was constructed in the 1970's to accept oil field brine generated by local producing oil wells. Residual oil is skimmed fran the surface of the brine and recovered before the brine is discharged to the evaporation ponds. During the early days of operation, previous owners used unlined ponds for evaporation but these ponds were removed fran service in 1979 and ponds lined with a soil-bentonite mixture were constructed and have been used since. Chen & Associates, Inc. has been retained on several different occasions to provide technical assistance to owners of the site. In August, 1979, Chen & Associates, Inc. conducted a subsoil investigation of the area where a new evaporation pond was to be constructed and recvmnerried design and construction details to be observed in constructing the pond and placing the natural liner material (Chen Job No. 19,030) . Several letter reports (Chen Job No. 19,477) were written during the period December 1979 through March 1980 relating to inspection and permeability testing of the compacted natural liner material placed in the new pond. In August 1980, a second evaporation pond with natural liner was constructed and Chen & Associates, Inc. inspected the liner and performed laboratory tests of permeability (Chen Job No. 22,860) . A total of 1 ,110 tons of bentonite were placed in the liner and the results of 331 test of the liner material were reported in 24 daily reports. In December 1981 , two samples of the liner material were also tested for permeability in the laboratory. Tne results ranged fran 4.8 x 10-8 to 6.9 x 10-8 cm/sec. _ In May 1983, Chen & Associates installed three groundwater monitoring wells and sampled six monitoring wells and two ponds (Chen Job No. 25,680). The results of the sampling were reported to Weld County Disposal, Inc. , the owners of the site at that time. Groundwater monitoring wells, in addition to those installed by Chen & Associates, have been placed on the property but the frequency of monitor- ing and the selection of Chemical parameters for analysis have been incon- - sistent which make available groundwater monitoring information incomplete. Adequate control locations are lacking as are indicator locations that will unequivocably reveal the extent of seepage from the lined ponds, if any. The purpose of this report is to summarize the available information and interpret the results with respect to potential impact of the brine ponds on the Trostell Well located to the east of the property. FIELD INVESTIGATION On March 19, 1984, the site was visited and the monitoring wells (Fig. 1 ) were sampled. Water levels were recorded at the time of sampling as was the depth to the bottom of each monitoring well. Samples were also collected fran the lgirdmill" located southwest of the site, the Trostell Well, and the cold water tap in the office. The source of water for the office is a well at the rear of the building. The depth of completion of the office well and the Windmill is unknown. -2- The water samples were analyzed for sodium, potassium, calcium, magnesium, diloride, sulfate, and total alkalinity by Accu-Labs Research, Inc. in Wheat Ridge, Colorado. She results of these analyses are provided in Table I. It should be noted that W-3A, located to the south of t44-4, was dry at the time of sampling, and that the sample collected at Y4-3 contained black particulate material suggestive of oil contamination. -4- TABLE I RESULTS Q' CHEMICAL ANALYSIS1/ M[;-2 MW-3 MW-4 MW-5 MW-6 OFFICE TRC iTELL WINDMILL Major Cations Sodium 1600 340 3100 2800 150 120 280 190 Potassium 430 500 120 7.4 1 .1 1 .7 4.7 310 Calcium 110 250 780 1100 130 45 360 90 Magnesium 24 93 230 260 40 20 86 29 Major Anions Chloride 3100 1300 8100 • 6700 310 110 1500 160 Sulfate 480 820 23 30 180 110 120 450 Total Alkalinity 590 520 470 460 380 220 220 540 (as CaCO3) - 1/ All results reported as mg/l. -5- PREVIOUS RESULTS During previous years several water samples have been collected from monitoring wells in the vicinity of the site. In addition, the pond waters and the Trostell Well have been sampled. The results of all known analyses of the pond waters are summarized in Table II and the results for the Trostell Well are provided in Table III. These results show that the pond waters are Characterized by high concentrations of sodium and potassium chlorides with low concentrations of sulfate. Based on the analysis from July 2, 1981 , the distribution of salts in the pond water is provided in Table IV. These calculations show that the pond _ waters contain 81% NaCl, 16% KC1, 1% CaC12, 1% Cz(HCO3)2, 1% Mg(H003)2, and a trace of !' SO4. The analyses of the Trostell Well provided in Table III show that these waters are Characterized by a mixture of chlorides, sulfates, and bicarbonates of sodium, calcium, and magnesium, with very little potassium being present. The distribution of salts in the Trostell Well in 1982 consisted of 53% CaC12, 26% NaC1, 11% MgC12, 6% Mg(HCO3)2 and 4% MgSO4. A trace of KHCO3 was also present in the Trostell Well. -6- TABLE II RESULTS OF CHEMICAL ANALYSES POND %WISPS UNLINED POND POND POND C POND A POND B Major Cations 7/2/81 6/28/82 7/19/83 4/18/83 4/18/83 Sodium 12,000 11 ,500 5,7802/ 3,390 9,120 Calcium 260 352 436 410 120 Magnesium 78 80 63 52 90 Potassium 4,100 2,150 1 ,9702/ 3,1704/ 1 ,8104/ Maior Anions Chloride 24,900 11 ,0001/ 11 ,200 8,610 15,400 Sulfate 10 <10 0 20 185 Total Alkalinity 750 510 630 5203/ 9003/ 1/ Based on concept of electroneutrality this value should probably be 22,000 m3/l. 2/ Calculated based on concept of electroneutrality and sodium-potassium ratio from 7/2/81 sample. 3/ Calculated based on total alkalinity-magnesium ratio from 7/2/81 and 7/19/83 samples. 4/ Calculated based on concept of electroneutrality. -7- TABLE III RESULTS CF QiEMICAL ANALYSES TRCSTF.LL WELL MAJOR CATIONS 6/23/83 7/19/83 4/19/84 Sodium 700 1040/ 280 Calcium 1233 1228 360 Magnesium 288 310 86 Potassium 20 2/ 4.7 MAJOR ANIONS Chloride 3840 4260 1500 Sulfate 230 230 120 Total Alkalinity 352 380 220 (as CaC03) 1/ Calculated based on concept of electroneutrality. 2/ Not determined, assumed to be zero for purpose of calculating sodium concentration. -6- TABLE III RESULTS OF CHEMICAL ANALYSES TROSTEiL WELL MAJOR CATIONS 6/23/83 7/19/83 4/19/84 Sodium 700 10401/ 280 Calcium 1233 1228 360 Magnesium 288 310 86 Potassium 20 2/ 4.7 • MAJOR ANIONS Chloride 3840 4260 1500 Sulfate 230 230 120 Total Alkalinity 352 380 220 (as CaCO3) 1/ Calculated based on concept of electroneutrality. 2/ Not determined, assumed to be zero for purpose of calculating sodium concentration. -8- TABLE IV PEROL T DISTRIBUTION OF SALTS IN WATER SAMPLES POND TROSTELL WELL WATER 6/23/82 4/19/84 NaC1 81 26' 33 KC1 16 CaC12 1 53 48 MgC12 11 4 Na2SO4 K2SO4 tr CaSO4 MgSO4 tr. 4 5 NaHO73 KBD tr Ca(BCO3)2 1 My(HCO3)2 1 6 10 -9- ANALYSIS OF DATA Previous analyses of samples collected fran the site suggested that the brines in the ponds consisted principally of chlorides of sodium and potassium, with very low levels of sulfate. Consequently, Chloride and potassium was selected as an indicator of brine waters and sulfate was selected to indicate the presence of groundwater fran sources other than the ponds. The purpose of analyzing these data was to determine the main sources of brine in the subsurface waters so that future efforts could be directed to those areas requiring the most immediate attention. The data show that the lowest chloride levels were found along the northern boundary of the site and at the Windmill, to the southwest of the _ ponds. The lowest sulfate levels were found on the eastern portion of the site and the lowest potassium values were found along the northern boundary. There are no definite trends in the data that clearly show the direction of flow of the brines that may be seeping from the ponds. _ Locations 4 and 5 have high chloride levels and low sulfate concentrations typical of the brines, but Location 5 has an unusually low potassium concentration. Similarly, Locations 2 and 3 have elevated chloride and potassium values typical of the brines; but, again, the sulfate levels are elevated which is not representative of a pure brine sample. These data indicate that there are brines underlying the site, but the brines are mixing with other groundwater that contain elevated levels of constituents not typically present in the brines. For example, the -1Q- composition of groundwter at Location 3 appears to be influenced by another source of water that contains elevated sulfate concentrations. The source of this groundwater may be the Speer Canal which distributes irrigation water from Barr Lake, 9 miles south of the property. The Windmill location contains waters that have elevated sulfate and potassium levels, but low Chloride concentrations. Finally, Location 6 contains waters that have moderate levels of chloride, sulfate, and low potassium values. However, the sulfate levels are much higher than those found in the brines. To summarize, here are brines underlying the disposal site, but there are also at least three different types of groundwater in the vicinity of the site that are influencing the composition of samples collected from the monitoring wells. These are: (1 ) Groundwaters to the north of the site that contain moderate chloride and sulfate levels and low potassium concentrations; (2) Groundwaters to the west of the site that contain moderate chloride concentrations and elevated potassium and sulfate levels; and (3) Groundwaters to the south of the site, possibly originating from the Speer Canal, that contain elevated sulfate levels. The Trostell well sample contains elevated chloride concentrations, moderate sulfate levels, and low potassium concentrations. This cunbin- - ation of constituents is not consistent with the hypothesis of contamin- ation of the well by seepage from the evaporation ponds because elevated chloride levels should be accompanied by elevated potassium concentrations. In fact, however, the potassium levels in the well water are very low -11- indicating that the chloride is coming fran sane source other than the evaporation ponds. Since this well is located adjacent to the Speer Canal, it is my opinion that the quality of the well water is a reflection of the effects of irrigation on water quality rather than the effects of seepage fran the ponds. This water could contain fertilizers, herbicides and pesticides leached fran irrigated fields as well as chlorides, . sulfates, and other inorganic constituents. The composition of the irrigation water will undoubtedly vary with season and irrigating activity. The distribution of salts in the Trostell Well shown in Table IV shows clearly that the relative imposition of the well water has not changed substantially during a time period of nearly two years. If seepage from the brine disposal area were affecting the composition of the well waters, then potassium levels would be expected to increase with time and this effect has not been observed. It is clear from examining the data that there is brine underlying the • brine disposal area. What is not clear is whether this brine is currently seeping fran the lined ponds or whether it is residual brine that seeped into the groundwater when the unlined ponds were in operation. The question of seepage fran the lined ponds can only be answered by draining the ponds and examining the integrity of the liners. There are two subsurface areas of the site that show marked evidence of brine contamination. These areas are toward the northeast corner of Pond C in the vicinity of Monitoring Wells 4 and 5 and the area in the vicinity of Monitoring Well 2. -12- REOYVIENMATICNS Based upon the available information, we make the following recommendations concerning future work to be done at the site: (1 ) The natural liners in the evaporation ponds should be inspected to determine whether they need to be repaired to prevent seepage; (2) Additional groundwater monitoring should be done to determine whether the distribution of brine underlying the site displays a consistent pattern; and (3) When adequate groundwater monitoring data have been collected and analyzed, a plan should be developed to bring the site into compliance with local and state regulations. Cd N S ASSOCIATES, INC. .24141 A4141 By John E. 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II — CON N O II — N it O II II N — \ lI 0 N I S •.• U N J — W \ O CJ N n S • 1'^ 3 I J0- C I� — 3 I Y W Ti LLL• N W 40 M `. Q to . - C o O Ln O LA n 0 L V 1 1 1 1 I I I I 1 1 1 1 1 1 - , 1 I Jill IIIIIIIIII 133d - NOI1VA313 . s 00 N- G = E O is l 7 __ r- E to 01 u L. C c -J 0 v • .+ • • 7 u 0 V — in 7 V E p, e N C O n 3 E r E O C in 0 7 In L V in 3 E C E —C 3 to an a- 7 pW I- 8 .A U ... J 0C 7 O. C 7 C O E > C n 7 • C yE .. 0 n y T n 7 10 - - 3 _L 0. LcC in C 01 O. °O. U C in Q W _ _ V n1 v n I - 7 07 S C4 • L J S - A E O W C 0 - N N J J 7 _ 7 - 01 a A E u - 0 L C 1t 0 W 2 n ._ L . L- 01 - W Q T u a. 0 c ° 0. 0 .� O C u = — n E — L N 0 G a- - a0 O n n 7 q u - ... •••• - C \ .- L 1-. 0 n U V• n In J s— J J O 1 L — I�V1 V L- 7 n L 7 e0 V .. L O n T — — al O O VI T • r0 - N >. �� 0J n .Ti V L V 10 M0 T Cn C f-. 01 7 .0 U — — n ... — U — T _ c c L L 0 U 0 in .0 L O ° O n 0 — A I. T 0 U - L_ ... 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O W O CO I _1 • N 03 .— •-• Co .0`0 ^ 0 00II CO en 4.4 N —• N`.O e.1 {V el TO II LT y N - O InN - - N o InN - - ON W T en ''... N NON N \ \ N O N N 1 \ II 1104.1 N .— J O N J — O In J N J — N S J O N W ,y • ^30 I J 0.. — — 3 I J 0- Y`- I 30 I C 11 a 1 4 • II Ih T N N eh LT - - N 0III - - - OS N 0 II II \ \ .•• N. J N J - T in .... I W T es, I J 4 .- en N 01 . • c-I\ F^\0 ,.,.. >OOO„,„,...7„..:::\:::-.:xt.:7.:Nt. . \ \L . \ \ \ \ ‘ .... Cfli lel 0 t V Z• U %A 0 LT O LT O In 0\ CT n CO CO0O .O .0 In 0 u. CO I ! I I miff I I I I 1 1 l ) 11 I 1 1 I I 1 I I I 1 1 1 I I I I r` • s I . NOTES: 1 . Test holes were drilled on June 12 thru 14 , 1984 with a 4- inch diameter continuous flight power auger. Test holes were drilled on June 12 thru 14 , 1984 with a 10" inch diameter continuous flight hollow stem power auger . 2. Locations of test holes were measured approximately by pacing from feature« shown on the site plan provided. 3 . Elevations of test holes were measured by instrument level and refer to the bench mark on Fig. 1 . 4. The test hole locations and elevations should be considered accurate only to the degree implied by the method used. 5. The lines between materials shown on the test hole logs represent the approximate boundaries between material types and the transitions may be gradual . • 6. Water level readings shown on the logs were made at the time and under conditions indicated. Fluctuations in the water level may occur with time, 7. Laboratory Test Results: WC=Water Content ($); DD=Dry Density (pcf); -200=Percentage passing No. 200 Sieve; LL=Liquid Limit ($); PI=Plasticity Index ($); RES-Soil resistivity (ohm-cm) . • 1 417 84 Chen & Associates NOTES Fk. 4 CA-2-79 • — chen and associates, inc. HYDRDMETEF ANAL VS!! SIEVE ANALYSIS 11Mf RE ADINGI US Si ANUANU$F HIES I L.kAA SUU*NL U✓EN'NU9 14 HA 744 ,,D 15 M... 15 M '. 60 MIN 19 MINA MIN 1 MIN '20C '10C '50 'AC'3D '16 'F 4 i' 0 ` 0 1 r I — — 1D 1 I jr, . y so , 1 70 To — ! r } W C 60 040 v. 1 Aso{ f 5C,c CA I 4 GO C f , v. - 170 s... — 20 1711' A so 10 r — 1 1 20 1 0 _ oI 11• p, 0W .Wb 005 015 .03; .0>4 14 5 26' 1590 1 ".19 ^3E •75 b.52 1b 1 36.1 7E.i 11 20C 041 2.0 157 IDIAMETER OF PARTICLE IN MILLIMETERSI SAND GRAVE. COBBLES FINE I MEDIUM 1LOARSE FINE CLAY TO SILT COARSE GRAVEL O 7. SAND 75 % SILT AND CLAY 25 ,. * LIOUID LIMIT PLASTICITY INDEX — SAMPLE OF Silty sand FROM Hole 1 at depth 5' HYDROMETER ANALYSIS I SIEVE ANALYSIS TIME READINGS I U 5 SIANDARD SERIES I CLEAR SQUARE OPENINGS 2A HI 7HR • 0 45 MIN 15 MIN 60 MIN 19 MIN•MIN I MIN '2% '100 -5D v0"30 '16 �*6 '• l0D l i 0 D I /. . I w / 20 — 70- i 30 1 Z6ti . C v 40 W N i ` — .c C 50, 5Uc U a 4I f 600 1L. 101 10� 94 ' I 90 1 01 r . n . i. A L 1100 .001 .001 DOE .009 019 .037 074 149 797 ' 59A 1 19 C 3E •76 9.5t 101 361 762 117' 200 Cu: 2 C 152 I DIAMETER OF PARTICLE IN MILLIMETERS CLAY TO SILT SAND' i GRAVE_ i INE 1 MEDIUk. ICOAPSF( FINE i COARSE COBBLES GRAVEL O En SAND 63 5e SILT AND CLAY 37 R — LIQUID LIMIT S. PLASTICITY INDEX 4° SAMPLE OF Silty sand FROM Hole 2 at depth 31 GRADATION TEST RESULTS Fio. 5 I - - CA-2-79 — chen and associates. inc. HYDROMETEF ANA.YSIE SIEVE ANA.YSIS 'IML RkADmuS „_ 5'Ar.LIAA: 55k162 I _5c A.S.,u4nLJ1.5NII.at — 24 444 7 m 10 .5 MIN 15 MIN 60Mlt. 19 MIN.MIA 1MIN '20r -10r '5^ •A2.3: 'It I'F -< 1 ' F F 100 0 — w o Y i 10 > 1 20 i TD / x — o z W :.n: 1.. X 40 50`c — i 1 Z. i mu .0 I so c L i I 4 Wm TD — 1 — 20 1 W I 10 x _ — 0 r . _ 1z 1 1_ a 4 i an 00: 005 ODE 0£ 057 0)A 1.£ 297 I 590 11£ "3E 476 55: ,51 361 762 12"' 100 042 z o 152 DIAMETER OF PARTICLE IN MILLIMETERS SAND GR — CLAY TO SILT FINE 1MEDIUM 1COAR$E FINE (VECOARSE COBBLES GRAVEL 0 % SAND 47 F SILT AND CLAY 53 • LIQUID LIMIT PLASTICITY INDEX SAMPLE OF Very sandy clay FROM Hole 2 at depth 13' HYDROMETER ANALYSIS I SIEVE ANALYSIS TIME READINGS I u$ $:ANDARD SERIES I CLEAR SQUARE OPENINGS 21 my )HR .5 MIN I5 MIN W MIN IA MIN 4 MIN 1 MM '200 'WO -50 '40'30 '15 IoE 's A — 0D I 0 !b10 - W 1J 7 70 x O 1 r O S F / 1 ADC ✓ , xc 50 e▪ .DI / WC. A A - x i D mr W - 1 101 r w .-_ G WO 001 002 005 005 D1£ 0. 0%- u. 2£F 1 590 114 C.3E -)6 £52 151 3t1 ]E2 ' 200 DA2 26 152 —. I DIAMETER OF PARTICLE iN MILLIMETERS I cAN: I GRAVE- CLAY TO SILT COBBLES Lip.[ I MEDWr• (CORPSE( FINE I COARSE —. GRAVEL 0 5, SAND E9 k SILT AND CLAY 11 St LIQUID LIMIT 1 PLASTICITY INDEX 5e SAMPLE OF Slightly silty sand FROM Hole 3 at depth 5' 6 GRADATION TEST RESULTS Fla CA-2-79 — chen and associates, inc. HYDROMET EA ANA.YSTE f SIEVE ANA:`"SIC LME Af ADINGS I c Si n, Ar: SERIES I LLEAF SQUAF.1 O✓ENINu` 2.1.4 7 He '10 15 MIN 15 MIN 60 MIN 19 MIN AMIN 1MIn 'AK '10C '50 '.C']C 'lf I'F •s 0 5'f F' pp_ D 90 10 $0 I20 70 30 — I i c Z60 r 1 w_ v — ` /jh/ • 50 J L 50 c_ i AO ! 6C • 3P. 70 20 Er -1 so to { x c 11 1 00i OOL .COS .009 019 .021 GL 149 297 I .59L 1.19 2.36 A 76 195: 1F 1 361 76.2127' 200 C 2.0 152 I DIAMETER OF PARTICLE IN MILLIMETERS I SAND GRAVE. CLAY TO SILT FINE I MEDIUM ICOARSE FINE I COARSE COBBLES GRAVEL 0 % SAND 26 %. SILT AND CLAY 74 16 % LIQUID LIMIT PLASTICITY INDEX SAMPLE OF Sandy clay FROM Hole 4 at depth 10' — HYDROMETER ANALYSIS I SIEVE ANALYSIS TIME READINGS I U S STANDARD SERIES I CLEAR SQUARE OPENINGS 24 HR 7 HR •10 15 MIN 15 MIN 60 MIN 19 MIN 1 MIN 1 MIN '200 '100 •50 •S0"30 '1E ''E •A i' 1'•' ] S"F 100 I 0 1 90 7 10 -I sot 20 — To' • 730 I 1 j D N,� wi 1 r SOT 50C e• w 60C C A. 30. .l 20 I 20 60 1— u4------. '— 'so 0 F c 1 . . 1. [00 001 .002 .005 co. 015 _037 074 145 257 1 59L 1E D 3E 4 76 552 151 311 712 127' 2 017 2C 152 DIAMETER O' PART ICLE IN MILLIMETERS I CLAY TO SILT SAN: I GRAVE_ COBBLES I._ I MEDIUM 'COARSE' 1INE I CORPSE GRAVEL 0 S. SAND 87 C. SILT AND CLAY 13 4, LIQUID LIMIT I" - PLASTICITY INDEX 9° SAMPLE OF Silty sand FROM Hole 5 at depth 5 ' GRADATION TEST RESULTS Fig. 4-4 CA-2-79 — chen and associates, inc. M YDROMETEEF ANAL YS❑ SIEVE ANALYSIE l IME READING[ U b 51 ANDARL'SEbEE ` 7.4 EAk SUUANL URtNIF.,a, jI HA 7MF .1D 45 M1N 15 MIN 60 MIN I,MIN•MIN 1 MIN '20C '1DC '5C 'If'3D 'It I'F A A a. 1' - S F r no D 90 .4Z--------- 1 D 50 20 70 130 60 ID 2.2 N v 6, 50 5 c — W i I AD I 6C c f- it.. 70 — i 20 BD w I I. 0 r r II 1 _ 1 l 1 .I A I. -e mo a, 002 005 .WM 5 019 037 -074 S .26' I .55L I 1.19 23E 4,7E b52 15.1 361 7L2 1271 200 .042 2.0 152 IDIAMETER OF PARTICLE IN MILLIMETERS SAND GRAVE,CLAY TO SILT COBBLESFINE I MEDIUM !COARSE SINE f COARSE GRAVEL 0 % SAND 1 b 5: SILT AND CLAY 82 % LIQUID LIMIT PLASTICITY INDEX SAMPLE OF Sandy clay FROM Hole 6 at depth 51 HYDROMETER ANALYSIS I SIEVE ANALYSIS TIME READINGS I LI 5 SIANDARD SERIES I CLEAR SQUARE OPENINGS 24 MR 7MR 45 MIN 15 MIN 6D MIN lP MIN I MIN I MIN '200 '100 '50 'IC'30 'lE I0B 'e 3. i' lu ' 5 e- 0]I f 0 E0 10 BO 2D y 70 t 30 Cr • f 1 0 v— v H �_ t 50 / SOc r. P401 �C L C 30h. 70 202 BD — 10 90 I I IOC DOI D a 005 .005 .015 .037 074 145 257 1 557 1 15 c 3 F 7E 5.52 lc 1 3E 1 76.2 12-' 200 042 2C 452— DIAMETER OF PARTICLE IN MILLIMETERS FA CLAY TO SILT FANG I GRAVEL COBBLES FINE I MEDIUM I COARSE! FINE I COARSE — GRAVEL 0 So SAND 22 Lw SILT AND CLAY 7 b % LIQUID LIMIT % PLASTICITY INDEX 4e SAMPLE OF Sandy clay FROM Hole 6 at depth 20' E GRADATION TEST RESULTS Fig. CA-2-)9 — chen and associates, Inc. HYDROMETER ANALYSIS SIEVE ANALYSIS LIME READINGS U S Si ANUARL SERIES I CLEAR SOUANL OVENINm: .4- 24 MP 7 M '1C 45 Min. 15 MM. SO MIN 19 MIN 4 MIN 1 MIN '20C •10C '50"•C 130 -11 1'F • L. a, P. f F 100 1 D to i ] / 10 - 00 / 20 70 1 x / , o Ev E. - got. v } R SD SO c 4 R •0 / 4 IC° k C 3d t/ 7020 my- -R J/1. t I*0 l . , lD .... 20 } ,1 i . 0 -1 r ,. ,!Ir 1 11 11_ ^- _ • IL • L • 100 001 00: 005 004 019 03, W 146 2S I SW 1 1c 2 3E •74 952 19 1 36 1 74.2 12>1200 042 2 0 152 IDIAMETER OF PARTICLE IN MILLIMETERS SAND GRAVE: — CLAY TO SILT COSSLES FINE 1 MEDIUM 1COARSE FINE 4 COARSE GRAVEL 0 ! SAND 81 'N SILT AND CLAY 19 7. * X LIQUID LIMIT PLASTICITY INDEX SAMPLE OF Silty sand FROM Hole 7 at depth 31 HYDROMETER ANALYSIS SIEVE ANALYSIS TIME READINGS U S STANDARD SERIES I CLEAR SQUARE OPENINGS 24 Mk 7 M 45 MIN IS MIN SD MIN II MIN •MIN 1 MIN 1200 'UR '50 'AC'30 '1E 10'4 '4, • 4, L.- 1'L' 5'!' 100 0 1 *0 / D 1 IC , 20 — 70 I 20 z F, } o v, -So — H - �� SOP c♦0 — — I 9014. O R i W 30 R } )0 20 110 101 197 0 1 • u • -1• I r 100 001 002 005 004 019 037 074 149 797 I 59C, 1 14 C 3E 4 75 5 52 19 1 3E "1 2E 2 12 200 042 20 152 _ I DIAMETER OF PARTICLE IN MILLIMETERS SAND 4GRAVE CLAY TO SILT . COBBLES LINE I MEDIUM IDDAPSEI CINE 4 COARSE GRAVEL 0 k SAND 51 % SILT AND CLAY 45 % LIQUID LIMIT PLASTICITY INDEX SAMPLE OF Very clayey sand FROM Hole 7 at depth 131 GRADATION TEST RESULTS Fla c J • W r • •-•2 3 W rn t� 0 0 r� W z E O _ s v. — m N — S O N N — O J r J '>.1 — d J W 0 'C p U- 0 r O-a r - J Z J W W S 3 0 i+% n CO CO 02 • J it% I— Q\ I- 1+1 1- O W N — N N — W r O W W O O r N 2 0 CC — O rr — O 2 2 O N O S J W U J J C7 W CO ¢ 0 - r I•••• v+ CC ¢ x W m 0 = W .O f- .O i". N N. N CO .O 0 en O U. — r d W O J O N 0, e. a LI. .O 23 3 3 3 3 m 2 ryrPVC CAP GROUND SURFAC£2 -7I17•71 ao ?/I oLi CEMENT GROUT (10FEET OR GROUND WATER LEVEL WHICH EVER IS LESS) • . SOLID 4- INCH PVC b ' .— PIPE !°' r .. .qn • t?• • IMPERVIOUS PLUG (1 FOOT-MINIMUM) — 12- INCH DRILL. HOLE (AQUIGEL OR EQUIVALENT) 4- INCH PVC MILL SLOTTED WELL SCREEN (WRAPPED WITH • G£OTEXTILE FABRIC) HOLE ALLOWED TO - - ' _ CAVE AROUND PIPE _- OR SAND BACKFHLL CLAY STRATA - PVC CAP 7/A\WfiY / 1 1 DEPTH VARIES _ TYPICAL SHALLOW MONITORING 1 417 84 Chen & Associates WELL DETAILS F1`. 10 I dilirt, PVC CAP GROUND SURFACE 4 • • ...iR• � CEMENT GROUT 10 '•. I' '•' SEE FEET OR TO WATER OTHER SURFACE OR 10 FEET FIGURE WHICH EVER IS LESS • .b.. -4 SAND (THICKNESS VARIES) SAND BACKFILL — SOLID 4- INCH PVC 12" DRILL HOLE PIPE • //A\Y//\\v V \Y//C`\ IMPERVIOUS zs► CLAY (THICKNESS VARIES) (AQUIGEL OR EQUIVALENT TO MATCH L CLAY LAYER V THICKNESS) • _ _f'I•� . ' it •�`'%= r°�� 4- INCH MILL SLOT PVC : . SCREEN!' -- :'� GEOTEXTILEAPPED FABRIC) p;;. WITH HOLE ALLOWED • • — ••.�;p.• TO CAVE AROUND - '•� - 4�'� SAND (THICKNESS VARIES) 5' • '' PIPE OR (LOCALLY NOT BACKFILLED WITH 'A;; .• _.••ate, PRESENT) SAND. •p ,' , _ -t gi • _•:_q:. VC CAP TYPICAL DEEP MONITORING ing. 11 1 417 84 Chen & Associates WELL DETAILS C M C C NU,T 1 T i• r _ .-. .. • o v u — L t gg }. C ^J T N T S wg R - 2 C L CO u V It L N C T C 4 VI u flt v N. T } • T T C T .:2 - L R - I. .- I. > 3 N > In > Co OSS 0 0 0 i •• •N E CO C cc ,,, C\ 5 Cr J a In — ' co co m m a r IO ,O IO . < C W 1 X X K O .O O. = i f•. n CO ^• I_ U) W ≤z? CO fa— `C„ M In T I'^ N H LU a N N N N 0. < F C Ic m r O F J� • O _ Q _ 0 O W J r�Cw> llll�� < m Q :21°. N in CO 1 u^ .. LA n n - ' N CO N. — 0. t S Z H O < m o.. • Q o= wx N. 2 3 N co m N Z J7. W 4 _ S lL U Q 'x a Q 4 • CO .O r U• .O CO _ In C VD C.Ac 2C u •025,c Vt1 LA _ V0 V0I a�CO cr 0 0 0 0 JS~4 _,2 m N. N C WO T 0 O\ CO C 1 Q+ .` 0 . "%'14 r\ O O in r In O` to O %.0 COO ^ N N — O O\ • fu N N N N N St p CA. LA C WS .—C CO 0 In C O. — to — — to N LA .- N C V 0 I t l < r — a o Q i N ft, S UN LA VQ w pm a f r — • J Vyz O a s «8 co r-. CO , >> S n E 0 0 I— z -. O co a i a- S J 15 I CO a : ^C„ W W1 % — Cr v M I. CO « a it— co 2i4 n - us i «:_ n W I J J O _ • I— • • • Y _0. " )- ; •.;r ^ V J J "C /�p _ .i p) 0 0) W i . zi8« J Q uG«� OwO� T CO wiI•« " 'T CCaii. - p < z I.. 0 ' COe— .4,z Q z w CO 1.A z J w q S LL. d_ 0 — U 444 0 0 • >. — Q J D. ^J Q .O z Y C X 2 - 2 4 Z of o\ a Cl) 4. 1:yi I. al C V c1 — c o o i)as R1 O• Sy C•1 Q O S. Y 'O r g a • Y O N. S Chen S Associates South Zuni ca:� Upriver Ccooraoo 80223 Goloraoe SDi•nos Gonsuerng Georecnncai Engineers 303 744.7105 G1errw000 Sr),rips San ;a,e Ca. July 12, 1984 Mr. Wes Potter, Director Environmental/Laboratory Services Weld County Health Department 1516 Hospital Road Greeley, Colorado 80631 Dear Mr. Potter: I am writing on behalf of Mr. Howard Duckworth, owner of Weld County Disposal, Inc. , to inform you that a nodification of th existing system is being undertaken and to request your approval for a deviation from the standard operating procedures in effect at the facility for a short period of time. The modification that Mr. Duckworth is undertaking is to convert the piping in the water skinning tanks to 12" line. He is also adding an additional skinning tank pursuant to your recommendation. Mr. Duckworth has been told by his contractor that ten working days will be required to make the modifications described above, and Mr. Duckworth needs your approval to bypass the skim tanks and discharge water directly fran the concrete pit to the area contained by the floating boon in Pond C. If you approve this temporary modification of the standard operating procedures, Mr. Duckworth will assure that any excess oil that may get into the containment area will be properly skinned and returned to the concrete pit. Mr. Duckworth's contractor wants to start work on Tuesday, July 17, and, with your approval, ten working days, through July 30th, will be allowed to complete the job. If this plan is acceptable to the Weld County Health Department, then Mr. Duckworth will nofity the contractor to begin work on July 17. Please indicate acceptance of the plan by signing each copy of this letter. Return one copy to me and retain one copy for your files. Thank you for your consideration. If you have any questions, do not hesitate to contact me at your convenience. Sincerely, Chen & Associates, Inc. John E. Hawley, Ph.D Environmental Manager Approved By Mr. Wes Potter, Director Environmental/Laboratory Services Weld County Health Department JEH/ran Enclsoures 96 Soon Zun, Casio- Chen Chen Q Associatesoe- Denver. CoOraoo 80223 Grevenne Consoling Georecnnror Enoneers 303 744.7105 Ccroraoc Snnnes Gren-•ooc Svrncs Foci Snnnes Sal Lime Cenv July 12, 1984 Mr. Wes Potter, Director Environmental/Laboratory Services Weld County Health Department 1516 Hospital Road Greeley, CO 80631 Dear Mr. Potter: I am writing on behalf of Mr. Howard Duckworth, owner of weld County Disposal, Inc., to provide you with information concerning plans to accept and dispose of -"frac gel" and "drilling mud" at the facility. As I indicated when we talked on July 5, Mr. Duckworth is proposing to accept "frac gel" and dispose of it in Pond D, the lined pond near the south end of the property. Mr. Duckworth will install an aeration device in the pond such as the one described in the attached literature to assist with the aerobic decomposition of the "frac gel". He will also construct a concrete receiving pit as designed by Mr. Cecil Crowe of Alpha Engineering in Fort Lupton and detailed in the attached figure. The receiving pit will allow for the inspection of each load of "frac gel" before it is discharged to Pond D. In this way, the inadvertent discharge of oil to the pond can be avoided. Mr. Duckworth is also proposing to accept drilling mud and dispose of it in Pond A, the pond that is located near the west property line. As you know, Pond A has been inactive for a period of time because of a suspected problem with the liner in the northwest corner of the pond. Mr. Duckworth will manit to repairing the liner in the northwest corner of the pond, and any other locations that appear to be deficient based on laboratory tests being done by Chen & Associates. It is expected that the repair of these areas will consist of mixing clay or additional bentonite into the near surface soils to a depth of at least 8 inches, adjusting the moisture content, and compacting the mixed soils. Representatives of Chen & Associates will observe and monitor the liner repair activities and will report on the Laira,letion of the task. When the integrity of the liner in the southwest portion of the pond has been established, Mr. Duckworth will construct a concrete pad and chute to provide for the discharge of the "drilling mud" to the pond. Mr. Crowe has also designed this improvement, and a copy of the design detail is enclosed. Mr. Wes Potter, Director Environmental/Laboratory Services Weld County Health Department July 12,1984 Page 2 I hope that this letter adequately describes the improvements to be made at the Weld County Disposal Facility before either "frac gel." or "drilling .mud" is accepted. Mr. Gary Kennedy, manager of the facility, understands that the waste material should not be commingled and will instruct all employees of this fact. If these plans are acceptable to the Weld County Health Department, Mr. Duckworth will pioc.ced to hire a contractor to construct the improvements. Please indicate acceptance of the design by signing each copy of this letter. Return one copy to me and retain one copy for your files. Thank you for your consideration. If you have any questions, do not hesitate to contact me at your convenience. Sincerely, CHEN & ASSOCIATES, INC. By John E. Hawley, Ph.D. Environmental Manager Approved By Mr. Wes Potter, Director Environmental/Laboratory Services Weld County Health Department JEH/bn Encl. Chen S Associates APPENDIX E — I Laboratory Reports for Groundwater — September 9, 1993 — I GROUNDWATER — TECHNOLOGY 09/23/93 16.24 $`316 945 0506 GTEL LABS I CT la 002 GT E L Project ID (Number): 040500007 (620504) ENVIRONMENTAL WIMP LABORATORIES, INC. ProjectlD (Neme): WC WO Ft. Lupton , CO Mldw..t Region Work Order Number: W3-09-0167 _ 4211 May Avenue Width*,KS 67209 (316)945.2624 (600)633.7936 (316)9454506(FAX) September 22, 1893 Don Shosky Groundwater Technology, Inc. 7346 S.Mon Way, Suite A _ Englewood, CO 80112 Dear Mr. Shosky: • Enclosed please find the analytical results for samples received by GTEL Environmental Laboratories on 09-10.93 under chaln-of-custody records 30167, 30165, 30166 and _ 30168. A formal quality control/quality assurance program is maintained by GTEL, which is designed to meet or exceed the EPA requirements. Analytical work for this project met QA/OC criteria unless otherwise stated In the footnotes. GTEL is certified by the State of Colorado. if you have any questions concerning this analysis, or If we can be of further assistance, please call our Customer Service Representative. Sincerely, as Terry R. Loucks Laboratory Director GTEL Wichita, KS COVLET.SET — 09/23/93 16:25 $316 945 0506 GTEL LABS in fd 003 Project ID(Number): 0405")00007 Project ID (Name): WCWD -" Ft. Lupton.CO Work Order Number: W3-09-0167 Date Reported: 09-17-93 _ ANALYTICAL RESULTS I. Priority tant EPA Metthdo Organics Water — GTEL Sample Modified Number 01 02 03 04 Client Identification MW-1 MW-4 MW-7 MW-8 Date Sampled 09-0943 09-09.93 09.09.93 00.09.93 Date Analyzed 09-14.93 09-1443 0D-14.93 09-14-93 Diutlon Multlplle►b 1 1 1 1 Reporting Analyte Limit, Kn. Concentration, u0/L Chloromethane 10 <10 <10 <10 <10 Bromomethane 10 <10 <10 <10 14 Vinyl Chloride 10 <10 <10 <10 <10 Chi oethane 10 <10 <10 <10 <10 Methylene Chloride 5 <6 <5 <5 <5 Trlohloroiuoromethane 5 <5 <5 <5 <5 1,1-Dlchloroethene 5 <5 <5 <5 <5 1,1-DIchloroethane 5 <5 <5 <5 <5 - - 1.2-Dlohloroethene(total) 5 <5 <5 i <5 <5 , Chloroform 5 <5 <5 <6 c5 1,2-Dlohlaroethane 5 <5 <5 _ <6 <5 _ 1,1,1•Trlohloroethane 5 <5 <5 <6 <5 Carbon Tetreohloride 5 <5 <5 <5 <5 _ Bromodlohlorornethane 5 <5 <5 <5 a <5 1,2-DIchloropropane 5 <5 c5 <5 <5 i cis-1,3-DIchloropropene 5 <6 <5 <5 <5 — Trichloroethene 5 <6 <6 <5 <5 A Dlbromochloromethane 5 <5 <5 c5 <5 GTEL WIchtta,K9 • GTEL — 3090167.DOO; 1 i IN V I I ON NIN1AI IS lAAetAtOlllr, INC. - 09/23/93 16:26 $316 945 0506 CIEL LABS ICT Lb004 - Project ID(Number): 040500007 — Project ID (Name): WOWWDD Upton, CO Work Order Number: W3-09-0157 Date Reported: 09-1743 — ANALYTICAL RESULTS • Priority Modified EPA Metthod Organics Water GTEL Sample Number 01 02 03 04 i — Client Identification MW-1 MW-4 MW-7 MW-B Date Sampled 09-0993 , 0D-09-93 _ 09-09-93 09-09-93 _ Date Analyzed 09-14-93 09-14-93 09-1443 09-14-93 Dilution Multplierb 1 1 1 1 • ReportingConcentration,ug/L "' Analyze Limn,WM 1,1,2Trlchloroethane 5 <6 <5 <6 <5 Benzene 5 <5 <5 35 12 I 2-Chio oethyWinyl Ether 10 <10• <10 <10 <10 trans-1,3-Dichloropropene 5 <5 <5 <5 <5 bromoform 5 <5 <5 <6 <5 i Tetrachloroethene 5 <5 <5 <5 <5 1,1,2,2 Tetrachloroethane 5 <5 <5 <5 <5 _ Toluene 5 <5 <5 <5 <5 Chlorobenzene 5 <5 <5 <6 <5 I Ethylbantene 6 <5 <5 <5 <5 _. 1,3-Dlchlorobenzene 10 <10 <10 <10 <10 1.4-DlcNorobenzene 10 <10 <10 <10 <10 1,2-DIcN0robenzene 10 <10 <10 <10 <10 — Xylenes(total) 5 <6 <6 <5 29 Acroleln 20 <20 <20 <20 <20 Acrvlonhrie 20 <20 <20 <20 <20 a 40 CFR Pt.136 App.A Protocol modified for OC per EPA 5240 and to Include additional target compounds. — b Dilution multiplier Indicates the adjustments made for sample dilution. NOTE: Sample temperature when received at the laboratory was 10C. GTEL Wichita KS IGTEL — 3090167.DOG1:2 } i NVIIONMIN TAI WNW IAIOIATONIII. INC — 09/23/93 16!26 ',316 945 0506 GTEL LABS ICT Id1005 Project ID(Number): (t 40 0007 4) Project ID(Name): WCWD Ft on, CO Work Order Number. W3-09-0167 Date Reported: 09-17-03 — ANALYTICAL C RESULTS Priority MMoodifiedd Volatile PA Method 6 4icsan Water GTEL Sample Number 05 08 07 08 Client Identification MW-9 MW-12 MW-13 MW-A Date Sampled 090943 09-0943 09-09.93 09-0943 Date Analyzed 09-1493 09-1543 09.14-93 09.1443 Dilution Multlpllerb 1 1 1 1 Anelyte Limit ucp. _ Concentration,wits Chloromethane 10 <10 <10 <10 <10 Bromomethane 10 <10 <10 <10 <10 Vinyl Chloride 1D <10• <10 <10 <10 • CNoroethane 10 <10 <10 <10 <10 , Methylene Chloride 5 <5 <5 <5 <6 _ Trlchlorofuoromethane 5 <5 <5 <5 <5 1,1-Dlthloroethene 5 <5 <5 <5 <5 1,1-0Ichloroethane 5 <5 <5 <5 <5 _ ' 1,2-Dlchloroethene (total) 5 <5 <5 <5 <5 Chloroform 5 <5 <5 <5 <5 i _ 1,2-Dlchioroethane 5 <5 <5 <5 <5 1,11j-Trlchioroehane 6 <5 <5 <5 <5 Carbon Tetrachloride 5 <5 <5 <5 <5 — ' Bromodlohloromethane 5 <5 <5 <5 <5 L 1,2-Dichloropropane 5 <5 <5 <5 <5 c/s-1,3-Dlchloropropene 5 <5 <5 <5 <5 Trichloroethene 5 <6 <5 <5 <5 Dlbromochiorornethane P 5 <5 <5 <5 <5 ' GTEL 309018877.D00u:. IGTEL 3 3 I t INIIONNIIITAI S IAIOIAIOIIIS, INC 09/23/93 16:27 15316 945 0506 CTEL LABS 1 CT O 006 Project ID(Number): 04405) 7 — Project ID(Name): WCWD Ft.Lupton,CO Work Order Number W3-09-0167 Date Reported: 09-1743 - — ANALYTICAL RESULTS • Priority Modi�fedd Volatile PA Metthod Organics Water GTEL Sample Number 05 08 07 08 Client Identification MW-9 MW-12 MW-13 MW-A Date Sampled 09-09-93 09-09-93 , 09-09-93 09-09-93 _ Date Analyzed 09-14-93 , 09-16-93 09.14.93 09.1493 , Dilution Multlplierb 1 1 1 1 — Reporting k gn Concentration,ug/L Anala L 1,1,2 Trichloroethane 5 <5 4 <5 <6 <6 Benzene 6 <6 <6 <6 <5 _ 2-CNoroethvigrni Ether 10 <10• , <10 <10 <10 trans-1.3-DIcN0rotxopene 5 <6 <5 4 <5 <6 Bromotonn 5 <5 <5 <5 <5 _ Tetraohloroethene 5 <5 <5 <5 <5 1,1.2,2-Tetraohloroethano 5 <6 <6 <6 <5 Toluene 5 4 <5 <5 <5 <5 Chlorobenzene 5 <5 <5 <5 <5 Ethj1benzene 5 <6 <6 <5 <5 — 1,3-DlcNorobentena 10 <10 4 <10 <10 <10 1,4-Dlehlorobenzena 10 <10 <10 <10 <10 1,2-Dlohlorobonzone 10 <10 <10 <10 <10 — Xylenea(toter 5 <6 <5 <5 <5 i ' Acroleln 20 <20 <20 <20 <20 , AoMonitrfie 20 <20 <20 <20 <20 a 40 CFR Pt136 App.A Protood modified for DC per EPA 8240 and to Include additional target compounds. _ b Dilution multiplier Indicates the adjustments made for sample dilution. NOTE: Sample temperature when received at the laboratory was 10O. - 309E0187 ght& KS DOC IGTEL s INVIfONY{NIA1 tt IAIONATOR117, INC. 09/25/93 16:28 15316 945 0506 GTEL LABS ICT l ]007 Project ID (Number): 040500007 (020504) Project ID(Name): WCWD Ft.Lupton,CO Work Order Number. W3.09-0187 Date Reported: 09-22-93 r ANALYTICAL RESULTS Inorganics GTEL Sample Number 01 02 03 04 Clientidentifcaton MW-1 MW-4 MW-7 MW-8 Date Sampled 09-09-93 09-0903 09-09-03 09-0943 Date Analyzed 09-14-93 09-14-93 09-14-93 , i to to to to 09-21-93 09-2143 09-21.93 09-21-93 OLa Analyte Method &Units Concentration Total Alkalinity EPA 310.1 NA mp/L 210 100 750 350 as CaCO3 Total Dissolved Solids EPA 160.1 1 mp/L 720 640 14400 3800 Chloride EPA 3252 3 mp/L 110 89 8000 1500 Total Hardness EPA 130.2 , 50 mp/L 200 260 600 210 as Ca0O3 a Ouantitatlon Unit. NA Not applicable NOTE: Sample temperature when received at the laboratory was 10C. GTEL Wichita, KS 1 , GTE 3090167W.ORG:1 lNY1ROMM 1.�►0►INOMI$, INC 09/23/93 16:28 '6316 945 0506 GTEL LABS ICT Z008 Project ID(Number): 040500007 (820504) Project ID(Name); WCWD Ft. Lupton,CO Work Order Number. W3-09.0157 Date Reported: 09.22-03 a ANALYTICAL RESULTS Inorganics GTEL Sample Number 05 06 07 08 Client identification MW-9 MW-12 MW-13 MW-A Data Sampled 09-09-93 09-09-93 09-09-93 , 09-0943 Date Analyzed 09.14.93 09.1443 09-14-93 09-14-93 to to to to 09-2143 09-21-93 09.21.93 09-21.93 OLa Analyte Method &Unite Concentration Total Alkalinity EPA 310.1 NA mg/L 320 340 560 300 as CaOO3 Total Dissolved Solids EPA 160.1 1 mg/L 9500 1000 2100 0100 Chloride EPA 325.2 3 mg/L 1000 170 210 090 Total Hardness CPA 130.2 50 mg/L 4000 460 140 4100 ' as C6CO3 a Quantitation Limit. NA Not applicable NOTE:`NOTE. Sample tampar h..�..i�� 1.-J at LLa laborator...as M Sample.hcl gn.tWia"''cii r�.elrsu chute lc W.a&Vly was l�V. GTEL Wichita, KS GTE L WMMIT TT.QRG; 2 ' IWYIlONNINTAI IMP 1AI0IA?ONI11, ING 09/23/93 16.29 'x316 945 0506 GTEL LABS 1CT Il009 • Project ID (Number): 040500007 (520504) Project ID(Name): WCWD • Ft. Lupton, CO Work Order Number: W3-09-0187 Date Reported: 09.22.93 Y ANALYTICAL RESULTS Total Hardness in Water GTEL Sample Number 01 02 03 04 CIieM Identification MW-1 MW-4 MW-7 MW-8 Date Sampled 09.09.93 09-09.93 4 09-09.93 0949.93 Date Digested 09-15-93 09-15-93 09-15-93 09.15.93 Date Analyzed 09.15.93 09-1843 09-18-93 09.1893 to to to to 09-19-93 09-19-93 09-19-93 09-19-93 Analyte h Method OL' Concentration,mg/L Total Hardness Std. Mtd. 50 mg/L 310 370 I 590 190 314A 18th Ed. as Ca003 IIL ' N.Ouantitatlon Limn, NA Not Applicable NOTE: Digestion by Method 3010/3020. NOTE: Sample temperature when received at the laboratory was 1°C. GTEL Wichita,KS � GTE L 3090167W.ORG:3 IWYItOy MINTAL 1A10\ATOf111, IyC 09/23/93 16.30 V316 945 0506 CTEL LABS ICT Ii010 Project ID(Number): 040500007 (620504) Project ID (Name): WCWD Ft.Lupton, CO Work Order Number; W3-09-0167 Date Reported: 09.22.93 v ANALYTICAL RESULTS Total Hardness in Water GTEL Sample Number 05 06 • 07 08 Client Identification MW-9 MW-12 MW-13 MW-A Date Sampled 09.09.93 09-09-93 09-08.93 09-09.93 Date Digested 09.15.93 09.15-03 09.15.93 09.15.98 1 Date Analysed 09.18.93 09-18-03 09-15-93 09.1883 to to to to 09-19.93 09-19-93 09.1993 09-19-93 Analyte Method OL' Concentration, mg/L Total Hardness Std. Mtd. 50 mg/L 3800 470 110 3800 314A 1891 Ed. as Ca003 0uantltatlon Limit. NA Not Applicable NOTE: Digestion by Method 3010/3020, NOTE: Sample temperature when received at the laboratory was 10C. GTELWichita, KS , GTE L 3090167W.ORG:4 IMYIIOMMtMTAI IAIDtATDtIII, INC. — 09/23/93 16:30 '8316 945 0506 GTEL LABS ICT 1011 • Project ID (Number): 040500007 (620504) Project ID(Name): WOWD Ft. Lupton, CO Work Order Number. W3-09-0187 — Date Reported: 09-22-93 — ANALYTICAL RESULTS • Metals in Water• GTEL Sample Number 01 02 03 04 Client identification MW-1 MW-4 MW-7 MW-8 Date Sampled 09-09-93 09-09.93 09-0993 09-09-93 Date Digested 09-15-93 09-15.93 09-15-93 09.15-93 — Date Analyzed 09-16-93 09-18.93 09-18.93 09-16-93 to to to to 09-19.93 09-1943 0919.93 09-1943 — Attslyte Method QL,•ug/L Concentration, ug/L Arsenic EPA 7080 5 <5 <5 11 11 — Barium EPA 6010 200 <200 <200 6100 c 10000 Cadmium EPA 6010 5 <5 <5 <250 <250 Catelum EPA 8010 1000 74000 110000 150000 56000 Chromium EPA8010 10 <10 <10 <500 — <50c iron EPA 6010 100 400 160 8200 11000 Lead EPA 7421 5 <5 5 14 15 Magnesium EPA 8010 1000 30000 24000 29000 10000 — Mercury EPA 7470 .4 <.4 <.4 <.4 <.4 Potassium EPA 6010 5000 <5000 <5000 1000000 330000 i Selenium EPA 7740 5 <5 24 <50b c25b Sliver EPA 6010 10 <10 <10 <50c <500 Sodium EPA 6010 5000 130000 50000 3700000 1000000 — a Test Methods for Evaluating Solid Waste,SW-848,Third Edition,Revision 0,US EPA November 1986: Digestion by Method 3010/3020,except for 7060,7470,and 7740 which are method specific. b The < value exceeds the quantitation limit due to dilution of the sample necessary to overcome Imerterences. — c The < value exceeds the quantitatlon limit due to a dilution factor made necessary by high sodium content in the sample. • OuarRftatlon Limn — NOTE: Sample temperature when received at the laboratory was 10C. — GTEL Wichita, KS GTE L 3090167WARG: 5 GNVI ION$IN? L a mvii I0t111. IA0. — 09/23/93 16.31 t316 945 0506 GTEL LABS KT (I012 Project ID(Number): 040500007 (620504) Project ID (Name): WCWD Ft. Lupton,CO Work Order Number: W3.09-0167 — Date Reported: 09-22.93 - ANALYTICAL RESULTS M Metals In Water' GTEL Sample Number 05 05 07 08 Client identification MW-9 MW-12 MW-13 MW-A Date Sampled 09-0943 09-09-93 09.09.93 09-09-93 Date Digested 09.15.93 09-1543 09-15.93 09-15-93 — Date Analyzed 09-16-93 09-16-93 09.16.93 09-18-93 to to to to 09.1993 09-19-93 09.19.93 09-19.93 — Analyte Method °L.,*ug/L • _ Concentration,ug/L Arsenic EPA 7080 5 <5 <5 25 <5 Barium EPA 6010 200 <10000 4 <200 <200 <10000 Cadmium EPA 6010 5 c25c <5 <5 <250 Calcium EPA 6010 1000 650000 130000 31000 660000 — Chromium EPA 6010 10 <50c <10 <10 <50c , Iron EPA 6010 100 2200 260 11000 1300 — Lead EPA 7421 6 a <5 6 20 <5 Magnesium EPA 6010 1000 490000 4,44. 35000 6400 520000 — Mercury EPA 7470 .4 <.4 <.4 <.4 <.4 Potassium EPA 8010 5000 <25000c 19000 150000 <250000 Selenium EPA 7740 5 62 <5 <5 81 — Sliver EPA 6010 10 <500 <10 <10 <5oc Sodium EPA 6010 5000 1000000 310000 630000 1200000 — a Test Methods for Evaluating Solid Waste,SW-846,Third Edition, Revision 0, US EPA November 1968;Digestion by Method 3010/3020,except for 7080, 7470,and 7740 which are method specific. b The < value exceeds the quantltation limit due to dilution of the sample necessary to overcome Interferences. c The < value exceeds the qurintitatlon limit due to a dilution factor made necessary by high sodium content In the sample. Quantitstion Limit. — NOTE: Sample temperature when received at the laboratory was 10C. — GTEL Wichita, KS I GTEL 3090187W:ORG:5 INYINONY 1A101AtONINS. INC APPENDIX F Historic Pond Water Quality GROUNDWATER TECHNOLOGY TABLE II RESULTS OF CHEMICAL ANALYSES POND WATERS UNLINED POND POND POND C POND A POND B Major Cations 7/2/81 6/28/82 7/19/83 4/18/83 4/18/83 Sodium 12,000 11 ,500 5,7802/ 3,390 9,120 Calcium 260 352 436 410 120 Magnesium 78 80 63 52 90 Potassium 4,100 2,150 1,9702/ 3,1704/ 1 ,8104/ Major Anions Chloride 24,900 11 ,0001/ 11 ,200 8,610 15,400 Sulfate 10 <10 0 20 185 Total Alkalinity 750 510 630 5203/ 9003/ — 1/ Based on concept of electroneutrality this value should probably be 22,000 mg/1. 2/ Calculated based on concept of electroneutrality and sodium-potassium ratio from 7/2/81 sample. 3/ Calculated based on total alkalinity-magnesium ratio fran 7/2/81 and 7/19/83 samples. 4/ Calculated based on concept of electroneutrality. -7- /&,t ?'coign apree+ n, i981 Ilkf'.g $ flh'7 /gi f t i b ,4) ire 'o..f APPENDIX G Pond Water Analytical Data May 1993 _ ►�GROUNDWATER TECHNOLOGY UE '11%S3 IC: 17 tt.T GTEL- 1O111A --- E\GLE%UUUC0 CE;jUU1 GTEL Project ID (Number): 045997525 Project ID (Name): Weld County ENVIRONMENTAL Waste Disposal gni LABORATORIES , INC. Work Order Number: W3-05-0518 Midwest Region 4211 May Avenue Wichito, KS 67209 (3IS)945.2624 (B00)633-7936 (316)945.0506(FAX: JUN 1 1 1993 Don Shosky Groundwater Technology, Inc. 7346 S. Alton Way, Suite A Englewood, CC 80112 Dear Mr. Shosky: Enclosed please find the analytical results for samples received by GTEL Environmental Laboratories on 05-27-93 under chain-of-custody record 29369, 29371, 29366, 29370, and 29367. A formal quality control/quality assurance program is maintained by GTEL, which is designed to meet or exceed the EPA requirements. Analytical work for this project met QA/QC criteria unless otherwise stated in the footnotes. GTEL is certified by the State of Colorado. If you have any questions concerning this analysis, or if we can be of further assistance, please call our Customer Service Representative. Sincerely, Terry R. Loucks • Laboratory Director • GTEL Wichita, KS COVLET.SET r r'VC' hbUUU cl i-U9= — oe :i s:, ;s: :r cret.-�1 2111 _ _ — Project ID (Number): 045997525 Project ID (Name): Weid County Waste Disposal Work Order Number. W3-05-0518 Date Reported: 06-11-93 ANALYTICAL RESULTS Semi-Volatile Organics in Water Modified EPA Method 6252 — GTEL Sample Number I 01 03 l Client Identification POND C POND D Date Sampled 05-26-93 05-26-93 — Date Extracted 06-02-93 06-02-93 Date Analyzed 06-05.93c 06-1D-93c ) 1 Dilution Multiolierb 2 t 1 I I I IReporting Concentration, ug/L Analyte Limit, ua/L N-Nltrosodimethylamine 10 <20 ( <10 I I — j Phenol 10 250 f <10 I I bis(2-CNoroethvl) Ether 10 <20 <10 1 2-Chlorophenol 10 <20 <10 — 1,3-Dichlorobenzene 10 <20 e <10 1,4-Dichlorobenzene 10 <20 <10 ) 1,2-Dichlorobenzene 10 <20 <10 1 i — I bis(2-Chioroisooropyl) Ether 10 4 <20 <10 N-Nitrosodi-n-prooylemine 10 25 I 23 Hexachloroethane 10 <20 <10 I Nitrobenzene 10 <20 <10 Isophorone 10 <20 <1 0 2-Nitrophenol 10 <20 <10 — 2h-Dimethylphenol I 10 <20 <10 I bisf2-Chloroethoxy)methane I 10 <20 <10 I _ 2,4-DichioroPhenol I 10 I <20 <10 1.2,4-Trichloroberzene 10 <20 I c10 Naphthalene 10 33 I <10 — Herachlorobutadiene i 10 ) <20 ) <10 r 305051 E.6 NA : 1 - e_ r .arGta,cr £s. Ina OD 5S 1b. lb 'aGiEL-' LC611A - \GLE)'UUD CU :0003 — Project ID (Number): 045997625 — Project ID (Name): Weld County Waste Disposal Work Order Number: W3-05-0518 Date Reported. 06.11-93 ANALYTICAL RESULTS Semi-Volatile Organics in Water - Modified EPA Method 62511 ......... CTEL Sample Number 01 03 Client Ideraification POND C POND D Date Sampled 05-26.93 05.26-93 _ I Date Extracted- 06-02-93 06-02-93 Date Analyzed 106-05-93c 06-10-93C Milton Multiplierb 2 1 I — Reporting Concentration, ug/L Anelvte Limn, ug/L 4-Chord-methylphenol 20 1 <40 c20 I — Hexechlorocydopentadiene ! 10 <20 <10 2.4,6-Trichorophenol I 10 <20 <10 2-Chloronaohthalene 10 <20 <10 I 2-NhroanCine 50 4 <100 <50— I DimethNphthelate 10 <20 <10 Acenaphihviene 10 <20 <10 I — 2,6-Dinitrotoluene 10 <20 <10 1 Acanaphthene 10 <20 <10 2,4 Dinitroahena 50 c100 <50 — I 4-Nhroohenol 50 <100 <50 2,4-Dinitrotoluene 10 <20 <10 I Diethvlphthalate 10 I <20 <10 4-Chiorophenyl Phenyl Ether 10 <20 <10 I Fluorene 10 <20 <10 I ! 4,6-Dini ro-2-methylahenol 50 I <100 <50 I l N-Nitrosodiphenvlamine 10 <20 <10 I I 1,2-Diohenyihvdrazlne I 50 <100 <50 I I 4-Bromoohenvl Phenyl Ether I 10 <20 <10 I I 3'.Wichita, KS G T a I 3050518.ENA: 2 - roe , L1LL-"ILt117A L.\L.Lt"`out' W IL IAA u0 11 yJ 10: 11 .. Protect ID (Number): 045997$25 Project ID (Name): Weld County Waste Disposal Work Order Number. W3-05-0518 Date Reported: 06-11-93 ANALYTICAL RESULTS — Semi-Volatile Organics in Water Modified EPA Method 625k GTEL Sande Number 01 C3 Client Identification POND C POND D , Date Sampled 05.26.93 . 05.26-93 , _ Date Extracted 06-02-93 06-02-93 Date Analyzed 06-05-930 , 06-10-930 , Mutton Muttipllerb 2 1 _ Reporting Concentration, ug/L Anatyte Limit. up/1 Hexachlorobertzene 10 <20 <10 Pentachlorophenol 50 <100 <50 _ Phenanthrane 10 22 <10 I Anthracene 10 <20 <10 — Dl-n-butylphthalate 10 <20 <10 Fluoranthene 10 <20 <10 Benzidine 50 <100 <50 — Pyrene 10 <20 <10 I Butylbenzylphthalate 10 <20 <10 3,3'-Dichiorobenzidine 20 <40 <20 — Benzo[elanthracene 10 <20 <10 ) I Chrysene 10 <20 <10 I Dis(2-Ethvfhexvl)phthalate 10 <20 I <10 I Di-n-ocMphthalate 10 <20 <10 I 1 Ber.zolb)luoranthene 10 <20 <10 / Benzoiklfiuoranthene 10 <20 I <10 Benzola]pvrene I 10 <20 <10 lndeno[1,2.3-c.djpyrene 10 <20 <10 Dibenzo[a,hlanthraoene 10 <20 <10 _ Benzo[o.n,/lpervIene 10 <20 I <10 f a Test Procedures for Analysis of Organic Polluants, Code gl Federa Regulations, 40CFR Part — 136. Method modified with a capillary column to include additional compounds. Sample preparation by liquid/llquid extraction. 1.2-Diphenylhydrazine quantitated as azobenzene. — b Dilution Multiplier indicates the adjustments made for sample dilution. c GC/MS data indicates the presence of non-targets hydrocarbons. — NOTE: Sample temperature when received at the laboratory was 10C. GT I. GTEL Wichita, KS • a i r.. :f{CNl• h,:M1 305051S.BNA : 3 '- me ,.ro«r0�aa. ub- 1] '93 1E: 19 ITCTEL-%1CHITA ---.ENGLE%00D CO 16005 Project 1D (Number): 045997525 Project ID (Name): Weld County Waste Disposal Work Order Number. W3-05-0516 • Date Reported: 06-11.93 Table 1 ANALYTICAL RESULTS Total Recoverable Oil and Grease In Water by Infrared Spectrometry EPA Method 41328 Sample i Identification Date Date Date Detection Concentration Sampied Extracted Analyzed Limit mg/L mg/L GTEL Number anent ID 01 POND C 05-26-93 05-08-93 06-09-93 0.2 69 1 03 POND D 05-26-93 06-06-93 06-09-93 0.2 I 17 J a Methods for Chemical Analysh of Water and Wastes, EPA 600/4-79.020, US EPA_ NOTE: Sample temperature when received at the laboratory wes 10C. GTEL Withrta, KS GTE b 3:150518 TOG TO.a - - • f\VIPCNN.INS,: IMIP t-t CF•'[➢'If •Nr — Proje ID (Number): 0459c7! s Project ID (Name): Weld County Waste Discosaf Work Order Number: W3-05-0516 — Date Reposed: 06.11-93 Table 1 — ANA.:-YTI CAL RESULTS Metals in Water. C-TEL Sample Number 01 I 02^ I 03 J 04•• Client Identification POND C POND C POND D POND D I (Dissolved) I (Dissolved) — I Date Sampled I 05-26-93 I 05-26-93 1 05-26-93 I 05.26-93 I Data Digested 05-04-93 05-04-93 06-04-93 06.04-93 to to to to i 06-05-93 05-05-93 06-05-93 06-0542 Date Analyzed 06.06-93 06-05-93 06-06-93 06-06-93 to to to to 06-05-93 05-06-93 06-06-93 , 06-0843 Anaiyte I Method C!L.• ug/L Contentration, ug/L Aluminum EPA 6010 203 - I 240 I - I 270 _ ) Arsenic EPA 6010 I 103 <100 i - <200 Boron EPA 6010 I 203 8300. — { 12000 ! - - iCadmium , EPA 6010 5 <5 — I <5 1 — Chromium I EPA 6010 10 17 1 — I 10 I — Copper { EPA 6010 I 25 I <25 i — I <2.5 — Hexavelent EPA 7196 10 <10D4 - <100Db — — ( Chromium Iron I EPA 6310 100 j 15000 I 7300 4400 I 1300 !sad EPA 100 + <100 I - <100 I - - 60010 f + Manganese 1 EPA 6010 I 15 1200 I 1000 I 1233 1100 Mercury I EPA 7470 1 .4 I 0.5 j — I <.4 — I Nickel I EFA 63iD I 40 i <43 - I <40 I - I Silver I EPA6013 I 10 I 11 - I <10 — I Tune I EPA 6010 I 20 ( 33 - I <20 ii — , a Test Methods for Evaluating Solid Waste, SW-646, Third Edhior,, Revision C, US EPA November 1985; Digestion by Method 3:1C/3.:20. except for 7060. 7470, and 7743 which are method specific. b Sarno had to be diluted due to turbidity and color interference. Matrix spike_ recoveries were — outside acceptebtfry limits. • Ouenitation Lint These samples were tiered by the laboratory at the request of the client The resahs represent the dissolved metals a:the time of filtering. Sample received by laboratory at pH-7. — • . - i NOTE: Sample temperature when received at the laboratory was 10C. — GTEL Wichha, KS GTE E L 30525;E.TA`1 - - WI ..ec..Tvue N.T. ut. .I:. 9u lti. .0 Lisi.:L-` ILH1_ L\G_6 iUUll Cl: i L 7 — Prolect ID (Number): 045997525 — Project ID (Name): Weld County Waste Disposal Work Order Number. W3-05-0518 Date Reported: 06-09-93 — ANALYTICAL RESULTS Priority Pollutant Volatile Organics In Water Modified EPA Method 624a — GTEL Sample Number 01 03 1 j Client Identification POND C POND D Date Sampled 05-26-93 05-26-93 Date Analyzed 06-02-93 06-02-93 Dlution Mtdtiplierb 1 1 Reporting Analyte Limit, ug/L Concentratibr.. ug/L Chloromethene 10 <10 14 I I Brornomethane 10 <10 <10 WTI Chloride 10 <10 <10 I Chloroethane 10 I <10 <10 Methylene Chloride 5 <5 <5 — Trichtorotluoromethane 5 <5 <5 1,1-Dichloroethene 5 <5 <5 I TTT 1,1-Dichlorcethane 5 <5 <5 1 1,2-Dichloroethene (total) 5 <5 <5- f Chloroform 5 <5 <5 — I 1,2-Dichioroethane 5 <5 <5 1.1,1-Trichioroethane 5 <5 <5 CaroonTetrachioride 5 <5 <5 — I Brcmodichtorornethane 5 I <5 <5 1,2-Dichioropropane 5 1 <5 <5 cis-t Dlchloropropene 5 I <5 <5 Trichloroethene 5 j <5 I <5 .. Dibromochloromethane 5 <5 i c5 I GTE335D ,..WDoC : 1hita, ^T 3050516.DOC : 1 v '...—. FwVI•CMul wti !0l w�0eii 5. :w: — ub li '9.: ]ti. ::U Tr GTEL-"lCdil. --- E\C:..D.00U UU ti,Ub03 Project ID (Number): 045997525 — Project ID (Name). Weld County Waste Disposal Work Order Number. W3-05-0518 Date Reported: 05-09-93 - ANALYTICAL RESULTS Priority Pollutant Volatile Organics in Water Modified EPA Method 624a 67EL Sample Number 01 O - 03 Client Identification POND C 1 POND D — ' Date Sampled 05-26-93 05-26-93 j / Date Analyzed 06-02-93 06-02-93 Dtution Muhiplierb 1 1 I — Reporting I Concentration, ug/L Limit,Lim , up/L 1.1,2-Trichloroethane I 5 I <5 I <5 I I I Benzene I 5 I 610 <5 j I — 2-ChloroethIIvintA Ether 10 <10 <10 — i trans-1,3-DichloroDropene 5 <5 <5 Bromoform 5 <5 <5 Tetrachloroethene 5 I <5 <5 1,1,2,2-Tetrachloroethane I 5 i <5 <5 Toluene I 5 j 2100 18 I IChlorobenzene 5 I <5 <5 j Ethylbenzene 5 I 110 <5 i 1 — I 1.3-Dichlorobenzene 10 I <10 I <10 I I i 1,4-Dichlorobenzene I 10 <10 I <10 1,2-Dichlorobenzene I 10 <10 <10 I l — i Xylenes (total) 5 1500 j 22 I Acrolein 20 I <20 1 <20 Acrvlonhrlle 20 _ I <20 i <20 I — a 40 CFR Pt.136 App.A Protocol modified for OC per EPA 8240 and to Include addbional target compounds. — b Dilution multiplier indicates the adjustments made for sample dilution. NOTE: Sample temperature when received a:the laboratory was 10C. C-TEELWichita. KS [ T L 3050518.DCO:2 .. � !! b -. I . ! a.0. IS ,,._ Uu 11 -S3 ib::1 ts ,ALL-hJCii11A --- L' ,...J1 000 LU z';e:ue Project:D Number): 045997525— project ID (Name): Wei° County Waste Disposal Work Order Number: W3-05.051B ' Date Reported: 06-11-93 — • — Table 1 ANALYTICAL RESULTS — Inorganics In Water — GTEL Sample Number 01 03 — I I Client Identification POND C POND D Date Sampled 05.26-93 05.26-93 i Date Analyzed D5-27-03 05-27-93to -i to 05-07-93 06-07.93 OL•&Units Concentration — ' Total Alkalinity ( EPA 310.1 NA 640 1000 1 mg CaCO /L <13 0-- Sulfate EPA 37.5.a — EPA 160.1 1 mg/L 14000 I 24000 Total Dissolved Solids 260 350 _ 1 mg/L ®--I Sli Ammonia N I EPA 350.1 doe m./L 1412000 —! EPA325.2 3rng/L 7400 970 Biochemical Oxygen Demand . EPA 405.1 2 mg/L >19D0b •' _ Chemical Oxygen Demand j EPA 410.4 20 mg/LIllitnirSi<.05 <.DS EPA 335.2 .D5 mg/L I <.05 <.05 1MIEZ MS_ EPA 330.1 .5 m0/L I <.5 I <.5 CMS EPA 376.1 I 2.5 mg/L <2.5 <2.5 I EPA 353.1 I .05mo/L _.5 — --— a Data represents the concentration of the sample when analyzed. The method for this analyze requires that it be analyzed immediately upon sampling. — b Sample concentration greater than highest dilution. • Ouamitation umtL NA Not Applicable. NOTE: Sample temperature when received at the laboratory was 10C. — — • �s� E ! GTEL Wichita, KS 1: ' o A'... ...e--a cs� `r 3050516.1 NC:1 Hello