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Home My WebLink About20191345EXHIBIT INVENTORY CONTROL SHEET Case USR18-0129 - MATTHEW AND LISA GEIB C/O ROCKY MOUNTAIN MIDSTREAM, LLC Exhibit Submitted By Description A. Planning Commission Resolution of Recommendation B. Planning Commission Summary of Hearing (Minutes dated 03/19/2019) C. Planning Services PowerPoint Presentation D. Janice Kinnin Fire District Notification (received 04/08/2019) E. Applicant PowerPoint Presentation (received 04/09/2019) F. Applicant Noise Modeling Report (dated 02/05/2019) Email regarding City of Evans referral response G. Staff (received 04/08/2019) H. J. K. L. M. N. O. P. Q. R. s. T. U. V. W. 2019-1345 EXHIBIT • 7 1 Pub\ic hearings concerning this property will be heard before the County Planning Commission and Board of County Commissioners. Both hearings will be held at: }'VELD COUNTY ADMINISTRATION BUILDING CO 80631 '1150 "O" Street • Greeley, w�!€ t� held on Commission Hearing M AeLl14 11 2011; at 12: 3o Pt'1 Board of County Commissioner t4earing willbe held an Al C. f Q _2011: : at 10 An A'rt=EjW,lfirN M10r5t Request �. �- - - e A SITE FOIPAIT OR NW � SUPPORT AND s .owa *a 14 A 60 -FOOT pia+ I0FI Tows ADO lF,ae3 M+� psi `�` 1- COMPOLIONSON STATION mot mo AiOI4F MAN NOME 0)N Ulm.KEO y.. fs� n ,4 -Dg. 1eatreICJ Do ?. MIATKIN F'�i.£_th• �.�1j1Ti41� �L ` FOR F�:Y frFrF��oM�1'.rINB�ai"i0'4 r "art may �I^_ T.x'..,J�.-�1 wv.�Y .00 ~�� :-4........ ()llf� N '..'r .w �w�. • Pir s e. tow Y / will be heard before the Pubic hearings concerning this property County Planning Commission and Board of County Commissioners. Both hearings will be held at: COUNTY ADMINSTRATION BU1LDlNG WELD1150 "0" Street Greeley, C � 8 63 1 Commission Hearing will be held on Planning 'Co 12: �� M '3!S' ^ t___ -o1 `3 : at �----- Commissioner Hearing will be held on gird of County � `�i : at Wfr� ACIaltre Mt _ �/G!O 12!Deics, nnyt- IMIA111114E1Erir-P5A etrratTrica. a atAlsiE siPIECIOGA . STATia4 fr ata.t,, r,r S '«' teat {e) MMS, TO at via 0 terintienOta 430. Erne swiarT� �+4 inpre un �++� OdUlanea Tway C ,OHS FOCA Flafat 441alicgap 4 • i-Ile ▪ -tea a i Nola a ea sW fi r+ avia. ,a '' y"Naar cie-alerb aNt;_as-lba...,..__ Akre. ,,aerars. _,-..arceibirentab aPa dab istioasaser- Ls !et astrie *LC: Snit e v I aavia;tir ems ass' la aims -! v a s a - I. ma - . 'ma —ea.-t - IOW • `mss �� - _ � '••• rear ew '- ,r ce te -�` q sit. a as '�"' ► � art# - -, �'- CIPICalla 3 same } - -- - •• - - s t— i j _ - a -. • sins !v.v. - - � ._ sAi -•' tii _a +1�s T` �� s Ai.s- -"ea-"ea+ , "a east r +� �� re ! - t . � a a?Ir_ a t r SE*��.� �".� 's+ • �'rrs •rte � a y - fsK • w k this fin es d b en of Carty tweanngs imp be a WELD COUNTY ADMINISTRATION BUILDING 115O� "O_ Street • Greeley. CO 80631 F4wila 'LAW ran Somerterell sari acs a ria% r WW..— � 1 t L� a —S --.t e+ a aw yaaP, . 4,4•40%4,4•40% sal Cr� 'fl See. �'' sa * OISSrr..,�.a e ate An Sit area ea. a, witervaaas Sean Sib Wee C s r +s: as 4 IPL �1i t� dealeat ers‘�� _sr raper r f ire ion a es — • mIlltaeraa° Sae an ranired as ay.as r a_ _a HP 'i• - • samara ' all�, , iw - - --a ?In, C' vam-4;► ..,}tea ♦'`•21 ea • rr - arm,. 't LSO • Op A Wile= p 11 u .aTilirr '.ca r a m . w •4 �. �r [!Emu.- " . -. � wi s�si-:* ' [1- • • .fo o m{ a .n i _ . �. • i• , _$ r'. i[ n E. E _--S X- '.; `'�. „� ii — �—+ ._'t C_ -- _s •r_ Wiz. _ EXISTING A CESS OFF F COUNTY ROAD 4 v s • di r• N a 1 ,. a `� • �..Y ,. •'•• - a 'J. L u ,r - j, J _ irs _. �; �i ."! aim .�E' �i�E ■ •,' E?1c± . !r - ' � f • 0 --■ tt za.a e L Flies, m I, c 6 !i. T s slintatz.. h a cis7%-anes - t F. c •c• yi ty ' "Li aja „ ..t!asblr.>lf,..t rJ M d s .:e'r. = ,� �. _ r • 1�_ •two ss VIEW TO SE FROM COUNTY ROAD 47 'T! -_a- Imo if tiralioIQ ari 41 r a: ace c 4' 'e syl VIEW TO SOUTHWEST FROM COUNTY ROAD 47 (SOUTHERN PORTION ; OF PROPERTY at 0 .- r -2 Mit ■ sIJE I Le ;tw.rr:� - • •ra 1 { 4 0 9 ¢. vYa am as a. Jr_ •e ¢ a• tri a; -21 Jtc • •- II In Ill ■ fl gar ] r R4li a� m - il IS ii, niE i' a - a q ' b 1 w _ - P �a •a - Y ■` ail; sn r y: 16 • P a _(- 9 ] 11 a, (y a • '' Nat I tali si 0 fr akliH▪ Q▪ - an Imo. _ a a 22 2a_2.- • as A air P • min a v U •i :• c r jai 4_ - cif ¢ v - �{-.m . r i • _EI ._ i. :Mr --r• y - s a- v o _ • y - G I s r •: a - _ _ - =. Ws tit ll ca -. alien c�•` c-.. i� m _ f ma a `"Ettrilitcgmliat_ta .c.. in Sin z .4 47,512 O fl. 1� P _ 1' _ f_r nimegij '6 I. mew - f ma -s a . -Y :t- 1." .f - . c -a Si _` r f • dry liar �j� DEPARTMENT OF PLANNING SERVICES BUILDING INSPECTION DIVISION 1555 N 17T" AVENUE, GREELEY, CO 80631 (970) 353-6100 X3540 (970) 304-6498 FAX FIRE DISTRICT NOTIFICATION PERMIT NUMBER USR18-0129 PLEASE MAIL OR FAX BEFORE ISSUANCE OWNER Matthew L. Geib CONTRACTOR Rocky Mountain Midstream, LLC SITE ADDRESS DESCRIPTION OF WORK Installation of an unmanned Natural Gas Compressor Station FIRE DISTRICT COMPLETE BELOW FIRE DISTRICT NAME LaSalle Fire Protection District ADDRESS /71 Plik,v, PHONE NUMBER q7o,DiriK___3,z, SPRINKLERS YES ENO COMMENTS S/b/2 ((5' CITY STATE FAX NUMBER 770 a? /(- ZIP SIGNATURE 4i/i PRINTED NAME q14 DATE 3 ,7/21 Auburn Compressor Station USRI 8-0129 Weld County Commissioners Hearing April 10, 2019 10:00 am 1 Company Overview Experienced Management Team Multiple management personnel in Northern Colorado Front Range. Recent capital infusion acquisition by Williams/KKR joint venture demonstrates and reinforces the continued long-term commitment to Colorado and the DJ Basin. Williams is the Operator of the newly named Rocky Mountain Midstream, re-establishing their Front Range presence. Strong preference for local hiring. ✓ Vast majority of our contractors are local. ✓ Proud to be moving former Coloradans back home. Team focused on Colorado projects for over three years. Bringing decades of experience building projects across the U.S. ✓Thousands of pipeline miles. ✓ Multiple compressor stations, treating and processing facilities. Strong Track Record • • • Goal Zero: Safety Culture. Stop Work Authority given to everyone. No Notices of Violations (NOVs) with PHMSA, OSHA, or EPA/CDPHE attributable to our Front Range assets. DOT regulated pipeline construction audit completed in Adams and Weld Counties with no findings. Well -capitalized to meet our commitments to the communities where we work and our vendors with whom we do business. Auburn Station Details Auburn Compressor Station • Located on an 10 -acre site • South of WCR 54, on the West side of WCR 47 • Adjacent to existing railroad tracks and ROW. Auburn CS Z Existing Access Road r Auburn Compressor Station • Parcel Overview a I t I — QUARTER -SET- IRON 917E 3D' PIPELINE ROW ROM MOUNTAIN IA IDSTREAM Lb: •— MET ING IRRIGATION / TRENCH fr meempiir 63-9.07 S sea se f = DQSTING BAIRCED-IAf7RE Ate FENCE 0 -- 30' PTPEL])IE ROW g DC P N]ES'REAPILP RIB NO. 4400024- IA - ▪ • r t•r-r▪ r !r 1 r(-a"'r e -r J' _fir +l Jr J ! ~r •J r 1 J! tip C r-' 1,4 I 1 J -. r- 1 .• JrJJ r -P J L 1y.� } r� < • I - STILRMMUTER ODLAI_NIION POND 13!HUSH ADLIJME 26, Cc (NO BUILDS -FORAGE AREA) OVERALL SITE PLAN AUBURN COMPRESSOR STATION PARCEL: 096126000 010 SECTION 26 TO5N ROSW USR 18-X XXX CIWNER: loaniEWLGELli USA R GEE (Pia 0063249,4V039) f r� r rf �a alit:s- J cars � — �.— - Cr'— j rsar 30' PIPELINE POW SADDLE BUTTE ROCXIES PILDSTREAM Lit P.EC. NO. 4347"833 ar at' t� J - rr err f rJ �f .... r -rte } 't .. 4-r re JJr y JJ l f JP rt r .! e+'''. Jr.,. re'. JJ. 1 rJ rf FJ-} JJ.... a J .1• r r>}J ~ r roll. Jrr'r a / "r . r J F . sig.a. •r �<J J ....- r -' J rt SI"a r FOLr'< < r <e _. -'s ,_rfJ r rr Jr r sCr I} _-' w/arr * J1 OWNER, JUC ICDI!NG5 LLC {PARCEL OfiLL2E000006) or J' est 30' PIPELINE ROW -5 ROCKY MOUNTAIN 1 MILISI war LLC PIPELINE ROW EYL4.GK Dm 11O D MOUES MIDSTREAM LLC MC_ No_ 44.10812 1 Jr r 30' PIPELINE ROW " OCP PcbStRL M LP Imo. NO. 44081323, ./1 ti 1 N yiL ' L I. l L as 1 I'14 IL 1 L t. l I. 'I " 61 +i L S JA_. r J r L .t I t 1 •'ris ewe a r a. a/ __a rG .r r r"A'}r r J < A ee <j s J.. OWNER; KANDRACE K.CRL13 (PARCEL fiNtilt400004) rs rr rJ aee moos { _r 1. r. 1• ape er t to } PJ' ✓ 0-11 a — -P Jr 30f PIPELINE ROW �R K E TR-•MI.1Cat c. GAITYCRINC, i 1 REC. NO. 1810931 30 PIPELINE ROW DP MIDE TLEAM LP REC ND. 4640 4(.I fi J-- r ao r'r� iirelie r ✓ r r • 3 J } y J J a ..e.1.1- sr JrJ • 1 .rta r}.. �r ir J1 Y} `1 JP JJ• rr� .rer J} _�y J" as 1 `r rJf re ' l`fil.. rt} rrrrr d,r J — i�p -tee -'— �Jr J sr` r t rJ r ��l} JJ ad r:P w r Jl y „- met 3Q PIPELINE PLOW KERB-N0GEE ORDERING, LLC RED Pie. 3ALi1 33 a O ER: STEVEN 3 SCHR0EDER KAREN D SCHROEDER [tun 09413140007 3) 1110' !MON PAfEEt RAD II1OAO1 -00E-WAN J I I I anw _L { r -r r Y ryr r a ll 1 Jr'! } �}; II r al I r tsr-- rar I r ar< .-_l Ja_ Jr }rJ .r• Y }t - r r. 1 J r EXLSTINCi (aPAVEL .ACCESS ROW EJC3GT]NG PROPERTY B0UM QIkRT Si L OWNS; C KEEA ION L PANL t L 'b6OME). v p� SHARED i C-r-FSS PINMIT TED J - r ROGER t KEATON {PARCEL 09612 00431167) IS MI r7 — r. N 1 r } ( -J� a _-1 2)7' PIPE.L NE ROW • tel- AnTE R. -S tenon I_thIlE U R COCK M R1TA71kd MCUS! REAM LLL. I _ E a Ti .13141E SP.RUE Cie -WERE FENCE — EXCST] IRRISaTEDIN TT! ENCH M METE !L SICED I _ srI _ I I _ C DP TR U T]1 DE-ed `TR#II LE P S AND CON EK STORAGE rrIMPOPAION) II I I S LOP TANK S lei _a_ 5 _',_1 7 WiLisE 14DA 1W ��.�_cj 2ie•ii�E C DMMUNECAhTEN Tr] WER IPdSriuMENT AIR Ski ED 030 LE R A IS sum LIGHT -111 G WILL 8 E 11O WINCAST .AJ.1fl SHIn_LLDE'Di (DAPS Se KY STAIN DAP= ICI p.IFEL]f r F.C19 CC MIOf TR LF REC. 'r+art. agiJnE0244 CHAIN LINK StECIJPrn FEN CE TUTLIFIE MCC IIum:itNG EiJZ11R� n& nETEF Skit, PROPOSE 1 LEAS E 1O.OO ACRE LOT ( FUTURE ELkt. ti mozesirealP :;51$ ti CIVICS Sr e e mit r II . CC edi ausrEn. I; FUTURE) r .f— FUTURE ®-Tn uvrcr r,-- FUTURE Cam ER FUWRE. DEHYDRAT3ON UNIT FL Cie rev' — Fi.r5'URE FILTER SKID C I� 1 eel I .,rte I est Miellarkiate raa- rat (PARE 1 - ape 0 R IIi pill 11 v .-;11 ri Si IEET L1.4 LANT SCHEDULE TREE.°=: SHRUBS CODE QTY 2U TAN NAME a !AMON NAME AE CA 4 CARPINUS CAROLINIANA AMERICAN HORNBEAM C.. 3 C ERCIS CANPIDENSIS EASTERN REDBUC Co E C ELTIS OCCIDBITALIS COMMON RACKBERF'' 8 GYMNOCLAEIUS CIOP A KENTUCKY COFFEE TREE GT 4 GLEDITS"IA TRIACI►&NTI4}S HONEY LOCUST K P ? 1EOELREU T ER A PAN IC ILATA GOLDEN FAIN TREE MS 8 MALLIS X 'SPRING SNOW' SPRING SNOW CAE APPLE PC B PICEA. PU NGGENS CC LORADO SPRUCE PD 12 PSEUD CITSUCA. M EIZI ESI I DOUGLAS FIR PP 12 PINUti PONDEROSA PON DEPOS►M. PINE • I B QUERCL'S MA'CROCARP'A BURR OAK CODE OTt' BOTANICAL NAME COMMON NAME AN 21 IDROPOGON GERARDII BIG BLUE STEM BR 23 BERBERISTHUNBEROII'ROSE GLOW' ROSY GLOW BARBERRY CB 7 COTONEASTER APIEULATIJS CORAL BEAUTY COTONEASTER CF 2 CORNUS SERICEA 'FLk ARAM EA' YELLOW TWIG DOGWOOD CR E CORNUS SERJCEA Rf TWIG DOGWOOD 13 FC RSYTH IA. X INTERMEDIA BORDER FORSYTHIA IA 39 MISCANTHUS SIN ENSIS JAPANESE SLYER GRASS PM PHYSOCARP LIS M CsNO 3YN US MOUNTAIN NI NEBARK RG 5 RrEES .AU REUM GOLDEN CURRANT RT 19 R HUS TRILOBATA SKUNKBUSH H SUMAC SC 0, SYRINSA X OHH NENGIS CHINESE LILAC VC 10 VIDU'RNUM C,ARLECII KOREAN SPACE VIBURNUM Fl U 1 , D L a I sir '—'.--�r 1 S 1 all Sal all a ualkaSi La.I 1 1 1 1 1 1 0 J :i 1 III )It 1 1 1 1 1 1 1 1 1 1 1 1 1 i 1 1 I 1 r (I)PC r (nn • sa P 1/44 Ler-snit RTPt— • 11111(15) F'13 rift 1 1 1 1 1 1 1 1 • .IIIIIPINO 'IRIS MEP =Mk MEM= • Y i • -r AHEM LLS • •!- riftiecilittfrLit t esK mod w I X X X • ft 1 1 1 1 1 1 1 i 1 a • 01-❑ _ i �y IMPLTITY Lit*-rW.$ war%_ — Isstati rr Em -;.- Y r, . ' ' I'f •�.� nap, , Prrei / I. 14— plIPD J X y. RUcal MGT COI,i -- Per: k Iry I fin ---- Ir a 1651-C1 Li. I I II I I li I I�fii � �I•I 44W1 Can I t ❑ L' ❑ r- II1'I". -10 asr ' are -- (Dec aerearrr O ��yy, n 25oiii 0) arri Okra a sirr al MAN — 11 IMP aelaarrar I I I' 1 1 1 1 1 1 1 1 General Design of Our Compressor Stations • • • • • • Engineered for safety. Designed to minimize noise and emissions. Sited on approximately 10 acre property. Major equipment is contained to -6 acres. Property enclosed fence with access -restricted gate. Equipment and buildings are painted to blend in with the surrounding agricultural areas (Canyon Tan). 14 Noise Model 15 Location 1 Average ge D aythne Ambient Noise Levels Rocky Mountain Midstream - Auburn Col r s s r, Station Ave rya g e Nighttime Amble lit Nob e Levels Location 2 Average .Daytime Ambient No.ise Levels Location Ave I'm ge Daytime Ambient Noise Levels Average Nighttime Ambient Noise Levels 16 Auburn Noise Model Scenarios Locatioti Table 4-4 Noise Modeling Results (dBA) Desei'ipt!on Scenario 1 Scenario 2 ec e tor 1 Receptor 7) ec eptor 3 .ec p for 4 ec eptor rie.) Recptor Receptor 7 Rec eptor Receptor 9. Northwest j..roperty lise of Parcel 096126000010 Northwest property e of Parcel 096126000010 North property lulu of Parcel 096126000010 East property line of Parcel 096126000010 South �.roperty l 096126000010 South p.rope7 lineof Parcel C19 12 000010 South property line of Parcel 09612.6000010 West proper line of Parcel 096126000010 West property: line oofParcel rc l 0961261)000 1 0 5L5 4.3 w 37.9 40.2 49.3 62.6 67.1 64.6 X5.1 41.3 336 3 L 334 403 48i 492 47.3 • IIM Auburn Noise Model Scenarios dBA Compliance Assessment Locations Auburn C• o in pressor Station Figure 4-1 Noise Sensitive Receptor. Locations (dBA) Auburn Noise Model Scenarios Tihie 4-3. Modeled Scenarios Modeled Scenario Description S.ceiiario 1 Scenario 2 F as lin —Compressor skids are modeled with specified mAsrs.4 engine exhaust silencers: ,compressor skids are enclosed n acoustical buildings with STC40 rated walls and roof. additionally.� Harsco 180-2Z coand an FNIC1 M12 condensate pump are modeled. Mitig.ated — Coinpi.'es.s.or skids are modeled with modified :NfAXIJ\1 engine exhaust silencerswith a minimum insertion loss per Table 4-2. modified flarsco 180-2Z coo ers andincludes 840 total linear feet of 15 -foot -high acoustical wall. with a Sound Transmission Class (STI rating oratin2 of at least 40 installed, on the western and southern perimeter of the site; compressor skids are enclosed in acoustical buildings witle: T ! 0 rated walls and roof: the FM C -M 1 2 ,condensate pum p is.'• surrounded with .n 8- foot -high permanent sound wail rated STC-40. Allowable NNoise At or within th.e bon:udary of the p roper y from Level which the noise complaint is made. 5511 Days 5(1.11 NNight The .no i _ e modeling results for Scenario 1 indicate that the propos•ed operations of the Auburn Compressor Station are predicted to exceed the allowable noise eve! limits oof the Weld County, CO noise t a rds at Receptors 1, 6., 7 .. 8 and 9 byas much as .1 c1ak.. The noise modeling ��o lin results for Scenario 2 indicate that with installation of a. permanent acoustical wit a condensate sound barrier,. modified engine exhaust silencers md modified coolers, the proposedp m ons of the Auburn Compressor Station are predicted to m l with the allowable noise level di units of the, Weld County. COnoise standards at all modeled receptor locations. Safety Culture 20 Strong Culture of Safety • Safety not just a word we use — it has meaning. • Safety is deeply embedded in our culture and informs the way we think, make decisions, design and operate our facilities. • We believe preventing a hazardous situation is the best way to ensure the safety of our employees, contractors and the public. • All of our facilities meet or exceed industry standards and regulations. • All employees and contractors have Stop Work authority/responsibility. • Variety of safety systems to protect the public and employees. ✓ Automatic shutdown systems at all facilities. ✓ Safe work permitting process. ✓ Written procedures and energy isolation safeguards. ✓ See Something, Say Something. ✓ Written Emergency Response Plans (ERPs) ✓ History of working directly with Emergency Responders through table -top exercises or drills. Environmental Stewardship 22 Environmental: Emissions & Noise State of Colorado air permit required. ✓ Some of the most stringent requirements in the country. ✓ Regular emissions testing. ✓ Routine maintenance and inspections. ✓ Leak Detection and Repair • The station would meet state and local rules for public noise in a zoned area. • • • Each compressor is enclosed in a noise -insulated building. Voluntarily use hospital -grade mufflers and "quiet tip" fans to minimize noise. ✓ 12 blades instead of 8, pitched in way that minimizes noise Spill Prevention Control and Countermeasures (SPCC) plan. 23 Operational Excellence 24 How We Operate Our Compressor Stations • • • • Thorough safety review before start-up. Management of Change (MOC) processes and training. All operators trained in accordance with established safety procedures. Monthly training regarding safe operations and injury prevention. ✓ Both classroom and onsite. • Facility monitored by trained plant operators 24 / 7 / 365. aily checks of all equipment. 25 Safety Features of our Compressor Stations i • • • I • Remote monitoring (SCADA) and automatic shutdown systems. Safety relief valves to prevent overpressure. Multiple redundant safety systems, including manual shutdowns. Electrically grounded equipment. Comprehensive safety training program. Detailed emergency response plan. All affected jurisdictions supplied copies. Work directly with local fire district representatives regarding emergency response scenarios. 26 Community Pride 27 Good Neighbors • We value being a good neighbor and a responsible operator. • Focus on safety & stewardship promoting positive impacts in our communities. • Prioritize volunteer opportunities and support local organizations Good Partners • Helping meet the energy needs of over 4 million Colorado households. • Good paying jobs, tax revenue and ROW payments to local landowners. • Striving to be your best neighbor and a positive corporate citizen. Fort Lupton Family Boys and Girls Club of Festival Metro Denver Cardinal Academy Track and Field Champion Partner 2018 Weld County Fair 100t" Anniversary 28 Auburn Compressor Station Noise Modeling Report February 15, 2019 Prepared for: Rocky Mountain Midstream 540 East Bridge Street, Suite A Brighton, CO 80601 Prepared by: Behrens and Associates, Inc. 13 806 Inglewood Avenue Hawthorne California, 90250 Antonio King Staff Acoustical Engineer Jason Peetz Engineering Manager Corporate (Mice: I la \\ thorne. Cal i lbrnia Carson. C all Iornia 1 eras \apa California I c)ngmont_ Colorado McDonald. Pennsyk ania 800-679-8633 \\\\\\.C'll\ lrl)nmental-noise-contri)l.ct)m Vs\\\\..drillin anoisecontrol.com Behrens and Associates, Inc. Environmental Noise Control 1. Introduction The following report provides a noise modeling assessment of the proposed equipment at the Auburn Compressor Station operated by Rocky Mountain Midstream in relation to the Weld County, Colorado noise regulations. The Auburn Compressor Station (40°22'18.72"N, 104'37'46.15"W) is located 0.6 miles southwest of the intersection between Weld County Roads 47 and 54 in Auburn, Colorado. Singe -family residentials are located north, east, south and west of the site. Figure 1-1 identifies the site location. To assess the predicted noise levels of the proposed compressor station. manufacturer sound level performance data of equipment, exhaust silencers, and acoustical buildings was used. The noise model was developed using SoundPLAN 8.0 software. The following is provided in this report: • A brief introduction of the fundamentals of noise. • A review of the applicable Weld County noise standards. A discussion of the noise modeling methodology and results. Figure 1-1 Pad Location Introduction Behrens and Associates, Inc. Environmental Noise Control 2. Noise Fundamentals Sound is most commonly experienced by people as pressure waves passing through air. These rapid fluctuations in air pressure are processed by the human auditory system to produce the sensation of sound. The rate at which sound pressure changes occur is called the frequency. Frequency is usually measured as the number of oscillations per second or Hertz (Hz). Frequencies that can be heard by a healthy human ear range from approximately 20 Hz to 20,000 Hz. Toward the lower end of this range are low-pitched sounds, including those that might be described as a "rumble" or "boom". At the higher end of the range arc high-pitched sounds that might be described as a "screech" or "hiss". Environmental noise generally derives, in part, from a combination of distant noise sources. Such sources may include common experiences such as distant traffic, wind in trees, and distant industrial or farming activities. These distant sources create a low-level "background noise" in which no particular individual source is identifiable. Background noise is often relatively constant from moment to moment, but varies slowly from hour to hour as natural forces change or as human activity follows its daily cycle. Superimposed on this low-level, slowly varying background noise is a succession of identifiable noisy events of relatively brief duration. These events may include the passing of single -vehicles, aircraft flyovers, screeching of brakes, and other short-term events. The presence of these short-term events causes the noise level to fluctuate. Typical indoor and outdoor A -weighted sound levels are shown in Figure 2-1. Detailed acoustical definitions have been provided in Appendix A — Glossary of Acoustical Terms. COMMON OUTDOOR NOISE LEVEL COMMON INDOOR SOUND LEVELS dB (A) SOUND LEVELS 71* 6-747-200 Takeoff at 2 mi. Gas Lawn Mower at 3 t. Diesel Truck at 150 ft. DC -9-3i0 Takeoff at 2 mi. Noisy Urban Daytime B-757 Takeoff at 2 mi. Commercial Area Quiet Urban Daytime Quiet Urban Nighttime Quiet Suburban Nighttime Quiet Rural Nighttime Fil irt�yfyr__ - . i'L L 1'10 Rock Band r 100 Inside Subway Train (New York) Food Blender at 3 ft_ BO 70 60 at 3 H. 50 40 30 20 10 Garbage Disposal at 3 ft. Shouting at 3 ft. Vacuum Gleaner at10 O ft. Normal Speech Large Business Office Dishwasher Next Room Small Theatre, Large Conference Room (Background) Library Bedroom a.t Night Concert Hail (Daokgrour d) Broadcast & Recording Studio Threshold of Hearing Figure 2-1 Typical Indoor and Outdoor A -Weighted Sound Levels Noise Fundamentals 8 Behrens and Associates, Inc. Environmental Noise Control 3. Weld County Noise Standards The modeling analysis was developed to predict operational noise levels at adjacent properties and verify compliance of operations with the Weld County noise standards. The Weld County code establishes permissible sound levels by type of property and hours of the day. The measurement location is defined in Section 14-9-50-A.2. "A noise originating on private property shall be measured at or within the boundary of the property from which the noise complaint is made". Based on the language in the Weld County code, the Residential noise level limits listed in Table 3-1 will be used throughout the report. Table 3-1. Home Rule Charter for the County of Weld, Colorado, Chapter 14, Article I — Noise, Section 14-9-40 — Maximum Permissible Noise Levels Land Use Maximum 7:00 am Noise to next (dBA) 9:00 pm Maximum Noise 9:00 pm to next 7:00 (dBA) am Residential Property or Commercial Area 55 dBA 50 dBA. Industrial Area or Construction Activities 80 dBA 75 dBA Nonspecified Areas 55 dBA 50 dBA Weld County Noise Standards Behrens and Associates, Inc. Environmental Noise Control 4. Auburn Compressor Station Noise Modeling 4.1 Noise Modeling Methodology The noise modeling was completed with use of three-dimensional computer noise modeling software. All models in this report were developed with SoundPLAN 8,4 software using the ISO 9613-2 standard, Noise levels are predicted based on the locations, noise levels and frequency spectra of the noise sources, and the geometry and reflective properties of the local terrain, buildings and barriers. The predicted noise levels represent only the contribution of the proposed compressor station operations and do not include ambient noise or noise from other facilities. Actual field sound level measurements may vary from the modeled noise levels due to other noise sources such as traffic, other facilities, other human activity, or environmental factors. The equipment sound level data used in the AuburnCompressor Station modeling was sourced from equipment manufacturer data per approved project design documentation. The modeling results predicted are dependent on equipment and mitigation orientation as indicated per provided project documentation. Table 4-1 lists the sound power levels of the modeled equipment. Table 4-2 shows the transmission or insertion loss data for the acoustical enclosure surrounding the compressors, the permanent sound wall and proposed equipment modifications. Table 4-1 Equipment Modeled for Auburn Compressor Station Quantity Equipment Manufacturer/Model Source Sound Power Level (dBA) 8Compressor Engine 3608 Compressor Exhaust with Maxim Silencer 3608 Compressor Exhaust with Modified Maxim Silencer 8 16 16 1 3608 Cooler Exhaust Modified 3608 Cooler Exhasut 3608 Cooler Intake Modified 3608 Cooler Intake 3608 Cooler Side Modified 3608 Cooler Side Condensate Pump CAT 3608 MCCOF4-4 -2018 -C 3 - 4726 HARSCO 180-2Z HARSCO 180-2Z HARSCO 180-2Z FMC M12 125.4 113.7 95.7 99.4 89.4 96.8 86.8 92.4 82.4 108.7 Auburn Compressor Station Noise Modeling 10 Behrens and Associates, Inc. Environmental Noise Control Table 4-2 Acoustical Performance Data Transmission/insertion Loss (dB) Equipment Description Octave Band Center Frequency (Hz) 63 125 250 500 1k 2k 4k 8k Permanent Acoustical Wall (STC-40) 24.0 19.0 32.0 38.0 44.0 45.0 49.0 Maxim Silencer #4726 31.0 39.0 43.0 40.0 33.0 31.0 32.0 31.0 Modified Silencer 49.0 57.0 61.0 58.0 51.0 49.0 50.0 49.0 4.2 Noise Sensitive Receptors The noise sensitive receptors have been chosen to be consistent with the requirements of the Weld County, Colorado noise standards. The requirements indicate that a noise originating on private property shall be measured at or within the boundary of the property from which the noise complaint is made. As such, receptor locations were chosen at the surrounding property lines of the Auburn Compressor Station to represent potential regulatory measurement points should a complaint be made. Figure 4-1 shows the A -weighted noise sensitive receptor locations. Auburn Compressor Station Noise Modeling 11 Behrens and Associates, Inc. Environmental Noise Control Figure 4-1 Noise Sensitive Receptor Locations (cIBA) Auburn Compressor Station Noise Modeling Behrens and Associates, Inc. Environmental Noise Control 4.3 Noise Modeling Results Two modeling scenarios were created to investigate various options at the proposed site and are described in Table 4-3. The results of the noise modeling are presented in Table 4-4. The locations in the tables correspond to the receptor locations identified in Figure 4-1. The results of the noise modeling are also shown as noise contour maps. Figure 4- 3 shows the Scenario 1 Noise Contour Map in dBA and Figure 4-4 shows the Scenario 2 Noise Contour Map in dBA. The noise contours are provided in 5 dB increments with the color scale indicating the sound level of each contour. The proposed Auburn Compressor Station layout is shown in Figure 4-2. Table 4-3 Modeled Scenarios Modeled Scenario Description Scenario 1 Baseline — Compressor skids are modeled with specified MAXIM engine exhaust silencers; compressor skids are enclosed in acoustical buildings with STC-40 rated walls and roof; additionally, Harsco 180-2Z coolers and an FMC M12 condensate pump are modeled. Scenario 2 Mitigated — Compressor skids are modeled with modified MAXIM engine exhaust silencers with a minimum insertion loss per Table 4-2. modified Harsco 180-2Z coolers and includes 840 total linear feet of 15 -foot -high permanent acoustical wall with a Sound Transmission Class (STC) rating of at least 40 installed on the western and southern perimeter of the site; compressor skids are enclosed in acoustical buildings with STC-40 rated walls and roof; the FMC -M12 condensate pump is surrounded with an 8- foot -high permanent sound wall rated STC-40. Auburn Compressor Station Noise Modeling 13 Behrens and Associates, Inc. Environmental Noise Control Table 4-4 Noise Modeling Results (dBA) Location Description Scenario 1 Scenario 2 Receptor 1 Receptor 2 Receptor 3 Receptor 4 Receptor 5 Receptor 6 Receptor 7 Receptor 8 Receptor 9 Northwest property line of Parcel 096126000010 Northwest property line of Parcel 096126000010 North property line of Parcel 096126000010 East property line of Parcel 096126000010 South property line of Parcel 096126000010 South property line of Parcel 096 126000010 South property line of Parcel 096126000010 West property line of Parcel 096126000010 West property line of Parcel 096126000010 54.5 41.3 43.0 33.6 37.9 31.0 40.2 33.4 49.3 40.3 62.6 48.5 67.1 49.2 64.6 47.3 75.1 45.7 Allowable Noise Level At or within the boundary of the property from which the noise complaint is made. 55.0 Day / 50.0 Night The noise modeling results for Scenario 1 indicate that the proposed operations of the Auburn Compressor Station are predicted to exceed the allowable noise level limits of the Weld County, CO noise standards at Receptors 1, 6, 7, 8 and 9 by as much as 25.1 dBA. The noise modeling results for Scenario 2 indicate that with installation of a permanent acoustical wall, a condensate sound barrier-, modified engine exhaust silencers and modified coolers, the proposed operations of the Auburn Compressor Station are predicted to comply with the allowable noise level limits of the Weld County. CO noise standards at all modeled receptor locations. Auburn Compressor Station Noise Modeling 14 Behrens and Associates, Inc. Environmental Noise Control ?MMI METE F: TI.! LL 3 -PHASE — SEPAfATOR. SKID \•. ■'1 VRU COMPRESSORS B-TEX UNITS EH?DRAT( O N UNITS TEG— CONTACTORS FILTER. SKIDS EXISTING IRRIG&T!(N TRENCH wth 171 C.:J1kSTRUCTIDN TRAILEPLS PND CONEX STORAGE (TT MPORARN) r FUEL GAS SKID HEADER SKI T CHAIN LINK seamITv FENCE Figure 4-2 Scenario 2 Auburn Compressor Station Layout ALL SITE LIGHTING WILL BE DOWNCAST AND SHIELDED (DARK SKY STANDARD) FUTURE CONTACTOR 'I FUTURE FILTER SKID *1k SKID FUTURE GAS•', METER 5KIO I'm OM EsU LIB CT Ft FMC M12 Condensate Pump CAT 3608 Engine gal Modified Maxim Silencer Modified Harsco 18O -2Z Cooler Acoustical Building (STC-40) Permanent Acoustical Wall (STC-40) 1 'g- f E�DMBUSTER (FUTURE) FUTURE UNIT now LyTiJRE 0 EH YDRATI 0 N UN TT ue: C. I 3 1 I Auburn Compressor Station Noise Modeling 15 Behrens and Associates, Inc. Environmental Noise Control Figure 4-3 Scenario 1 Noise Contour Map (dBA) Average Noise Level, Leg dBA I 30.0 35.0 _ 40.0 = 45.x► 50.0 55.0 60.0 65.! 70.0 x75.0 80.0 85.0 9►0.0 0 200 400 600 800 feet Auburn Compressor Station Noise Modeling Behrens and Associates, Inc. Environmental Noise Control Figure 4-4 Scenario 2 Noise Contour Map (dBA) Average Noise Level, Leg dBA 30.0 35.0 _ 40.0 = 45.x► 50.0 5.0 60.0 65.0 70.0 x'5.0 80.0 85.0 90.0 Q 200 400 600 800 feet Auburn Compressor Station Noise Modeling Behrens and Associates, Inc. Environmental Noise Control 5. Conclusion Predictive noise models were created to represent the proposed operations at the Auburn Compressor Station operated by Rocky Mountain Midstream. Manufacturer sound level performance data of equipment, exhaust silencers, and acoustical buildings was used in the models to asses to noise impact. Noise sensitive receptor locations included in the modeling were placed in accordance with the applicable noise standards of Weld County, Colorado. Based on the modeling results of the Auburn Compressor Station, our analysis indicates that the baseline predicted noise levels will exceed the allowable nighttime noise limit of 50 dBA at multiple receptor locations. With implementation of the recommended mitigation measures outlined in Table 4.3, all modeled receptor locations are predicted to comply with the Weld County maximum permissible daytime and nighttime dBA. limits. Conclusion 18 Behrens and Associates, Inc. Environmental Noise Control Appendix A - Glossary of Acoustical Terms Glossary of Acoustical Terms 19 Behrens and Associates, Inc. Environmental Noise Control Ambient Noise The all -encompassing noise associated with a given environment at a specified time, usually acomposite of sound from many sources both near and far. Average Sound Level See Equivalent -Continuous Sound Level A -Weighted Decibel Scale The human ear is more sensitive to some sound frequencies than others. It is therefore common practice to apply a filter to measured sound levels to approximate the frequency sensitivity of the human ear. One such filter is called the A -weighted decibel scale which emphasizes sounds between 1,000 and 5,000 Hertz by discounting the frequencies outside of this range. As the human ear is less sensitive to low frequency noise, the A -weighted decibel scale begins to increasingly discount noise below 500 Hertz. Measurements conducted utilizing the A -weighted decibel scale are denoted with an "(A)" or "A" after the decibel abbreviation (dB(A) or dBA). The A -weighted scale is nearly universally used when assessing noise impact on humans. C -Weighted Decibel Scale High level low frequency noise can propagate large distances from its source. Although not always audible, high levels of low frequency noise can induce vibrations in objects or structures which could become evident in ways that might be annoying to humans (e.g., rattling of windows). The C -weighted decibel scale, which was developed to estimate human ear sensitivity to high noise levels, is a flatter filter that does not discount low frequency noise as much as the A -weighted decibel scale. As a result, a C -weighted decibel measurement could be significantly higher than an A -weighted decibel measurement if the noise being measured contains a heavy low frequency content. Measurements conducted utilizing the C -weighted decibel scale are denoted with an "(C)" or "C" after the decibel abbreviation (dB(C) or dBC). C -weighted noise level limits are sometimes included in noise regulations as a way to address low frequency environmental noise issues. Community Noise Equivalent Level (CNEL) A 24 -hour A -weighted average sound level which takes into account the fact that a given level of noise may be more or less tolerable depending on when it occurs. The CNEL measure of noise exposure weights average hourly noise levels by 5 dB for the evening hours (between 7:00 pin and 10:00 pm), and 10 dB between 10:00 pin and 7:00 am, then combines the results with the daytime levels to produce the final CNEL value. It is measured in decibels, dbs. Day -Night Average Sound Level (Ldn) A measure of noise exposure level that is similar to CNEL except that there is no weighting applied to the evening hours of 7:00 pm to 10:00 pm. It is measured in decibels, dB. Glossary of Acoustical Terms Behrens and Associates, Inc. Environmental Noise Control Daytime Average Sound Level The time -averaged A -weighted sound level measured between the hours of 7:00 am to 7:00 pm. It is measured in decibels, dB. Decay Rate The time taken for the sound pressure level at a given frequency to decrease in a room. It is measured in decibels per second, dBis. Decibel (dB) The basic unit of measurement for sound level. Direct Sound Sound that reaches a given location in a direct line from the source without any reflections. Divergence The spreading of sound waves from a source in a free field, resulting in a reduction in sound pressure level with increasing distance from the source. Energy Basis This refers to the procedure of summing or averaging sound pressure levels on the basis of their squared pressures. This method involves the conversion of decibels to pressures, then performing the necessary arithmetic calculations, and finally changing the pressure back to decibels. Equivalent -Continuous Sound Level (Leq) The average sound level measured over a specified time period. It is a single -number measure of time - varying noise over a specified time period. It is the level of a steady sound that, in a stated time period and at a stated location, has the same A -Weighted sound energy as the time -varying sound. For example, a person who experiences an Leq of 60 dB(A) for a period of 10 minutes standing next to a busy street is exposed to the same amount of sound energy as if he had experienced a constant noise level of 60 dB(A) for 10 minutes rather than the time -varying traffic noise level. It is measured in decibels, dB. Fast Response A setting on the sound level meter that determines how sound levels are averaged over time. A fast sound level is always more strongly influenced by recentsounds, and less influenced by sounds occurring in the distant past, than the corresponding slow sound level. For the same non -steady sound, the maximum fast sound level is generally greater than the corresponding maximum slow sound level. Fast response is typically used to measure impact sound levels. Field Impact Insulation Class (FIIC) A single number rating similar to the impact insulation class except that the impact sound pressure levels are measured in the field. Glossary of Acoustical Terms 21 Behrens and Associates, Inc. Environmental Noise Control Field Sound Transmission Class (FTC) A single number rating similar to sound transmission class except that the transmission loss values used to derive this class are measured in the field. Flanking Sound Transmission The transmission of sound from a room in which a source is located to an adjacent receiving room by paths other than through the common partition. Also, the diffraction of noise around the ends of a barrier. Frequency The number of oscillations per second of a sound wave Hourly Average Sound Level (HNL) The equivalent -continuous sound level, Leq, over a 1 -hour period. Impact Insulation Class (TIC] A single number rating used to compare the effectiveness of floor/ceiling assemblies in providing reduction of impact -generated sound such as the sound of a person's walking across the upstairs floor. Imp act Noise The noise that results when two objects collide. Impulse Noise Noise of a transient nature due to the sudden impulse of pressure like that created by a gunshot or balloon bursting. Insertion Loss The decrease in sound power level measured at the location of the receiver when an element (e.g., a noise barrier) is inserted in the transmission path between the sound source and the receiver. Inverse Square Law A rule by which the sound intensity varies inversely with the square of the distance from the source. This results in a 6dB decrease in sound pressure level for each doubling of distance from the source. Ln Percentile Sound Level The noise level exceeded for n% of the measurement period where n is between 0.01% and 99.99%. Usually includes a descriptor i.e. A -weighting. Common Ln values include LA10, LA50, and LA90 levels. LA10' would represent the A -weighted sound level that is exceeded for 10% of the measurement period. Masking The process by which the threshold of hearing for one sound is raised by the presence of another sound. Maximum Sound Level (Lmax) The greatest sound level measured on a sound level meter during a designated time interval or event. Glossary of Acoustical Terms Behrens and Associates, Inc. Environmental Noise Control NC Curves(Noise Criterion Curves) A system for rating the noisiness of an occupied indoor space. An actual octave -band spectrum is compared with a set of standard NC curves to determine the NC level of the space. Noise Isolation Class (NIC) A single number rating derived from the measured values of noise reduction between two enclosed spaces that are connected by one or more partitions. Unlike STC or NNIC, this rating is not adjusted or normalized to a measured or standard reverberation time. Noise Reduction The difference in sound pressure level between any two points. Noise Reduction Coefficient (NRC) A single number rating of the sound absorption properties of a material. It is the average of the sound absorption coefficients at 250, 500, 1000, and 2000 Hz, rounded to the nearest multiple of O.05. Normalized Noise Isolation Class (NNIC) A single number rating similar to the noise isolation class except that the measured noise reduction values are normalized to a reverberation time of 0.5 seconds. Octave The frequency interval between two sounds whose frequency ratio is 2. For example, the frequency interval between 500 Hz and 1,000 Hz is one octave. Octave -Band Sound Level For an octave frequency band, the sound pressure level of the sound contained within that band. One -Third Octave The frequency interval between two sounds whose frequency ratio is 2"(1/3). For example, the frequency interval between 200 Hz and 250 Hz is one-third octave. One -Third -Octave -Band Sound Level For a one -third -octave frequency band, the sound pressure level of the sound contained within that band. Outdoor -Indoor Transmission Class (OITC) A single number rating used to compare the sound insulation properties of building facade elements. This rating is designed to correlate with subjective impressions of the ability of facade elements to reduce the overall loudness of ground and air transportation noise. Peak Sound Level (Lpk) The maximum instantaneous sound level during a stated time period or event. Pink Noise Noise that has approximately equal intensifies at each octave or one -third -octave band. Glossary of Acoustical Terms 23 Behrens and Associates, Inc. Environmental Noise Control Point Source A source that radiates sound as if from a single point. RC Curves(Room Criterion Curves) A system for rating the noisiness of an occupied indoor space. An actual octave -band spectrum is compared with a set of standard RC curves to determine the RC level of the space. Real -Time Analyzer (RTA) An instrument for the determination of a sound spectrum. Receiver A person (or persons) or equipment which is affected by noise. Reflected Sound Sound that persists in an enclosed space as a result of repeated reflections or scattering. It does not include sound that travels directly from the source without reflections. Reverberation The persistence of a sound in an enclosed or partially enclosed space after the source of the sound has stopped, due to the repeated reflection of the sound waves. Room Absorption The total absorption within a room due to all objects, surfaces and air absorption within the room. It is measured in Sabins or metric Sabins. Slow Response A setting on the sound level meter that determines how measured sound levels are averaged over time. A slow sound level is more influenced by sounds occurring in the distant past that the corresponding fast sound level. Sound A physical disturbance in a medium (e.g., air) that is capable of being detected by the human ear. Sound Absorption Coefficient A measure of the sound -absorptive property of a material. Sound Insulation The capacity of a structure or element to prevent sound from reaching a receiver room either by absorption or reflection, Sound Level Meter (SLM) An instrument used for the measurement of sound level, with a standard frequency -weighting and standard exponentially weighted time averaging. Glossary of Acoustical Terms Behrens and Associates, Inc. Environmental Noise Control Sound Power Level A physical measure of the amount of power a sound source radiates into the surrounding air. It is measured in decibels. Sound Pressure Level A physical measure of the magnitude of a sound. It is related to the sound's energy. The terms sound pressure level and sound level are often used interchangeably. Sound Transmission Class (ST) A single number rating used to compare the sound insulation properties of walls, floors, ceilings, windows, or doors. This rating is designed to correlate with subjective impressions of the ability of building elements to reduce the overall loudness of speech, radio, television, and similar noise sources in offices and buildings. Source Room A room that contains a noise source or sources Spectrum The spectrum of a sound wave is a description of its resolution into components, each of different frequency and usually different amplitude. Tapping Machine A device used in rating different floor constructions against. impacts. It produces a series of impacts on the floor under test, 10 times per second. Tone A sound with a distinct pitch Transmission Loss (TL) A property of a material or structure describing its ability to reduce the transmission of sound at a particular frequency from one space to another. The higher the TL value the more effective the material or structure is in reducing sound between two spaces. It is measured in decibels. White Noise Noise that has approximately equal intensities at all frequencies. Windscreen A porous covering for a microphone, designed to reduce the noise generated by the passage of wind over the microphone. Glossary of Acoustical Terms 25 Selena Baltierra o: subject: Chris Gathman RE: City of Evans Referral Responses for USR18-0129 & RECX19-OO13 From: City Planning<cityplanning@evanscolorado.gov> Sent: Thursday, March 28, 2019 2:19 PM To: Chris Gathman <cgathman@weldgov.com> Subject: City of Evans Referral Responses for USR18-0129 & RECX19-0013 Caution: This email originated from outside of Weld County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe. Hey Chris, Attached are the City of Evans Referral Response letters back for USR18-0129 & RECX19-0013. For both we have no conflicts or concerns at this time. Hope all is going well I know everyone was out the last couple weeks so hopefully its getting a little less hectic with Angela & Kim Back in the mix. Anyways thanks as always for getting these in the public records files for these cases and have a good rest of the week! Best Regards, Ryder City of Evans Planning Department Anne Best Johnson, AICP, MBA Savanah Benedick-Welch, AICP Ryder Reddick (970) 475-1167 Email: CityPlanning@evanscolorado.gov 1100 37th Street, Evans, CO 80620-2036 1 Hello