HomeMy WebLinkAbout1.3 Updated SubmittalsJuly 1, 2013
SSON
ASSOCIATES
Ms. Renata Busch
Encana Oil & Gas (USA) Inc.
143 Diamond Ave.
Parachute, CO 81635
Subject: Noise Analysis — Wolf Ranch Creek Compressor Station
Garfield County, Colorado
Dear Ms. Busch,
At the request of Hunter Ridge Energy Services LLC and in response to the proposed
installation of noise generating equipment at the Wolf Ranch Compressor Station (the station),
Olsson Associates (Olsson) has conducted an initial (pre -installation) noise analysis of the
station's equipment. The intent of this survey was to review the equipment specifications
provided (Attachment A), and determine if the equipment's operation would be in compliance
with the noise limits set forth in the Colorado Oil and Gas Conservation Commission (COGCC)
Rule 802 and Section 25-12-103 of the Colorado Revised Statutes (CRS). The COGCC and
CRS limits are the same for general noise measurements.
The sound -generating equipment associated with this assessment is three (3) natural-gas
driven compressor units. The compressor units consists of one (1) skid mounted engine -driven
compressor with an engine -driven fan cooler and a hospital grade silencer. The compressor
engines are Waukesha Series Four Model L7044GSI.
The proposed compressor unit will be enclosed in a fabricated structure. The enclosure is rated
to a sound pressure level of 75 db(A) at 23 feet. Olsson has assessed the potential noise level
at 350 feet using the noise/distance extrapolation equation provided in COGCC Rule 802 and
this enclosure rating.
The calculated sound pressure level at 350 feet from the station will be approximately 51.4
db(A) (see Attachment B). Note that this distance is less than the distance from the compressor
to the nearest property boundary. The maximum sound pressure level created by the operation
of the compressors at the nearest property line (approximately 2,300 feet north) would be
approximately 35.0 db(A).
As prescribed in COGCC Rule 802, in remote locations, where there is no reasonably proximate
occupied structure or designated outside activity area, the light industrial standard may be
826 211/2 Road TEL 970.263.7800
Grand Junction, CO 81505
FAX 970.263.7456 www.oissonassociates.com
013-1093
Wolf Ranch Compressor Station Noise Analysis
7/1/2013
applicable. Therefore, both calculated sound pressure levels are below the applicable Colorado
noise standard.
These sound pressure levels are calculated and actual noise levels should be measured during
equipment operation to insure regulatory compliance.
If you have any questions regarding this survey, please contact me at 970-263-7800.
Sincerely,
Olsson Associates
Ken Kreie
Senior Scientist
Enclosures —
Attachment A — Compressor Engine Specifications
Attachment B — Noise Attenuation Calculations
Cc: Project File
Attachment A
gas
06
d ri ve®�•
May 15th 2013
EnCana
RE: Waukesha VGF8GSI Generator Set
Attention: Stephanie Meany
Dear Stephanie,
As per your request Gas Drive Global Inc. is pleased to submit the following engine/generator
proposal for your consideration, the proposal is based on the requested scope of supply with the
following applying. Based on the spread sheet of loads provided, a gas sample for the location
obtained from Enerflex and evaluation of site conditions I can suggest the following.
1 One only GE Waukesha VGFI8GSI generator package 480 Vac 60H2 240 Kw at site
conditions, complete as per attached specification sheet and including the following:
• 342 Continuous BHP @ 1800 RPM at site conditions
• Turbocharged and Inter -Cooled, Rich Burn
• 6 cylinder in line
• 152 mm Bore x 165 mm Stroke
o Unit mounted radiator with engine driven cooling fan.
6 Option 3067 — K -type thermocouples for generator bearing and winding indication
o Option 3433E — Battery charging alternator, belt driven from engine crankshaft
• Option 4023- Engine jacket water heater 4500 watt 240 Vac
o Option 4650A — Low coolant level switches for jacket and aux water circuits
e Option 5200 - Kenko oil level maintenance device with 20 gallon reservoir
• Option 6192A — K -type exhaust thermocouples
• Option 6951 — Adjustable trip main line circuit breaker
• Option SPC2000 - GE Waukesha series 2000 control for engine generator set
• EMIT Edge NG air fuel ratio controller
• EMIT Critical grade catalyst silencer combination unit sized for the required emissions
• Stainless Steel exhaust flexible connection
• Sound Attenuated enclosure designed for site conditions with a sound rating of 75dba at
23 feet , includes inlet and discharge sound hoods, mounting of catalyst silencer, ac
lighting package. All fuel gas piping run to skid edge, along with drains for coolant and
oil.
o Structural steel base for generator set and housing that allows for crane lifting of the
entire package
o PECO 89-1-336-6-285 fuel gas coalesce filter assembly with auto drain valve. Mounted
inside generator set enclosure, with liquids drain piping pumbed to skid edge for
customer connection to suitable low pressure resivoir.
o SENS 24Vdc 10 amp automatic battery charger for off line maintenance of batteries
Distributor
Gas Engines
11151 East 51 Avenue, Denver, Colorado, 80239
Phone: 303.373.8100 Email: info@gasdriveglobal.com
Fax: 303.373.0115 www.gasdriveglobal.com
"g D CO
0
$ o�y f 3 co S a m p �oN tr D a o b (n
<o rn m <3y a' ° c o 2' o D n' m m o�'n.
o oa m e 6 a c m co Q. m a a R •
nmm 0-' m 3 o aoa. D Fn -°. 3 ,o ObT ° C Q
mx� ami d ,a�O t4 Go nr ' 4' m m ooam c ' aN a>><2 �,
ngD°v N -•� N < meo:m A m 0 m35a ▪ mg if
am—
< m a N y •� dmm ti 3 m ym ? CD&i •��nm 8ma 0- N a am o." X a -DI 3m� bm Dac•a to �' m p 0 g3 Y m �' i�'' < C 3• N m m N ��
° m 3 m a a or a �' "' 0 W m 5 n pp m G1 � w ••
0 Nm w m o'3'd o H 0 Co mDco � c n Z. �. •
1D m o a Oi a ° 18 1:1 < -) m ° 0 Z m 0 o 0 0.0
Of fii 3 m q a m m N x o 3 W c n o
m O m N N d N 0 N0
N N ra- O D O m a n c
°• a D o' 3'� 5 o• A 3,o n • d a5 noa
0
• 0 a a A 0 a -0 • O D N( Cm'i W a- N N Z a'
N m m
y o 3 g, HD m w na.@ -4 • to a° as �.0
a m n
a• V o N O 0 • =' y y d
X J Y m m N 3 0 m b f° V N d N .- N
a PI an
mf a s a s b i
w ym o Sj $ Z w 3o m? pa
�w y P4 im toAa. a tF Q. 3 co 0 • aoi,
o c c a in
m • 3 N
0 me o A `" ', 3 o uda
to
0 D. CO a N m D O ▪ S ry
e m m O -o a D N
rn g a< D D m
f m � co to a a m d aiom»
0 =ff ,a
a3, a cn m ran 1 a 3m
O a o m .< m N 0 a.
2. fa ° in o 0 m SmEZ
c• m
Q? N m� 1 3o vto o Co co a 5 aro
8w ay _ a
• m m a' 40. m
3 °Q `. N a as im
m
9 9
ENERFLEX
STANDARD EQUIPMENT
AIR CLEANER • Teo. dry type 11ith rain sh'e'd and service indicator.
BARRING DEVICE • Manual
BATTERY BOX • Designed Lo accommodate ten series 31 12 VDC batteries Includes pourer disconnect
switch and 20 fool (6 1 m) cable fa connection to ESM Power DsiribuEon Box
BEARINGS - Heavy thee replaceable. precis -ion type.
BREATHER • Closed system
CONNECTING RODS • Drop forged steel. nee drilled.
CONTROL SYSTEM • Waukesha Errgenlus Engine System Manager(ESM) integrates spark tiring control,
speed governing. detc'xaton protection. start•slop control, dlagnosuc tows, fault logging and engne safeties.
Engine Control Unit (ECU) is central bran of the conlrw system and main customer interface. Interface with
ESM is through 25 foot (7.6 m) harness to local panel, through MODBUS RTU stave connection RS -485
mu!tidrop hardware. and through the Electronic Service Program (ESP). Customer conneceoms are ony
required to the kcal panel, fuel valve. and for 24V DC power supply Compatible with Wocdvrad load
sharing mcdtye. ESM meets Canadian Standards Assoaation Class I. Division 2. Group D. hazardous
bcatim requirements
CRANKCASE -Integral crankcase and cylinder frame Main bearing caps drilled and
tapped fa temperature sensors. Does not lecrude sensors.
CRANKSHAFT - Fagged steel, seven man bearings. counterweighted and dynam-
cagy baanced.
CYLINDERS • Removable wet type cylinder liners, chrome plated on outer dameter
CYLINDER HEADS - Twelve interchangeable, valve•in•head type. Four valves per
cylinder, with water cooled exhaust valve seats. Roller vale titters and hydraulic
push rods Flange mounted ignition coils.
ELECTRONIC SERVICE PROGRAM (ESP) — Microsoft Windows-based program provided
on CD•ROM1 for programering and interface to ESM Includes E -HO for foub!eshooling any
ESM faults. Serid harness is prarded for conrectioo of a customer supplied laptop to the
ECU RS -232 pat.
ENGINE MONITORING DEVICES — Factory mounted and wired sensors for lube oil pressure
and lenperature, intake manifold temperature and pressure, and jacket wafer temperature, all
access bre through ESM. ESM m i6rualy monitors combustion performance through individual knock
sensors to provide detareyon protection Dual magnetic pick-ups are used for accurate engine speed
monitoring. ESA1 provides advanced diagnostics or engine and all ESM sensors and logs any fauns int,
ncn•vclatie flash memory.
ENGINE ROTATION - Counterclockwise. when faring flywheel
FLYWHEEL • Approx WR' = 155000 Heel': with ring gear (208 teeth), machined to accept two drive adapters.
31.88" (810 mm) pilot bore, 30.25" (768 mm) bolt circin, (12) 0.75" 10 lapped holes: or 28.86" (734 mrn)
diol bore, 27,25"(692 mrn) bat circle, (12) 0.625"•11 lapped holes and (12) 0.75"-10 tapped holes.
FLYWHEEL HOUSING - No. 00 SAE
FUEL SYSTEM • Two natural gas, 4" (102 nim) updraft carburetors and two Fisher Model 99,2" (51 mm) gas
regulators, mounted. 25psi (172 kPa) fuel inlet pressure required. 10 loot (3 in) harness provided for ESM
control of custornsr supplied fuel shutoff valve.
GOVERNOR- ElectricthrotdeactuatorcontrolledbyESMwiththrott:epositonfeedack Governorlunng
is performed using ESP. ESM includes optiov cf a Toad coming feature to improve engine response to
step bads.
IGNITION SYSTEM • Ignition Power Module (IPM) controlled by ESM, with spark /ming optimized for any speed -
load condlicn. Dual voltage energy levels autontaycal r col lrwied by ESM 10 maximtze spade plug life.
INTERCOOLER • Air -to -water
LEVELING BOLTS
LIFTING EYES - Requires 9.5 ton Waking Load Lime (W.L.L.) anchor shackles
LUBRICATION • Full pressure, gear type pump Ful flow lube o4 filter with repleceab!e depth -type elements
and flexible cennections, shipped loose. MICROSPIN bypass filter, engine mounted. Lube a1 shakier,
mounted. Airgas motor driven prebbe pump. requires final piping.
MANIFOLDS • Exhaust. (2) water cooled
OIL COOLER • She'll and tube type, with thermostatic temperature carerolier and pressure regulating valve.
Factory mounted.
OIL PAN • Base type. 90 gallon (340 L) capacity, Including filter and cooler
PAINT • area orange primer.
PISTONS • Numinum with floating pin, OJ cooled. 8.1 compression ratio.
SHPP1NG SKID - Steel for dorres5c !ruck or reit.
TURBOCHARGERS - (2) vriihwater-cooled bearing housing and adjustable waslegales. Scngio vertical
exhaust outlet at rear. Flexible stainless steel exhaust connection with 8" (203 mm) pipe Range.
VIBRATION DAMPER - Viscous type.
WATER CIRCULATING SYSTEM
Auxiliary Circuit • Bell driven water circulating pump fa mter000'er and tube orf cooler.
Engine Jacket • Belt driven water circulating pump. Cluster type thermostatic temperature regulating
valve, full (lav bypass type with 165' -170' F (74` • 77' C) Start to open thennostals Flange connections
and mating lenges for (2) 4" (102 mm) inlets and (1) 5"(127 nun) cabal
Quote:
I)lue:
('uetnuu'1
Page:
O-! 121120-1 IIF:\ 02
I:ehronse 14.21113
Euvaile
26 of 49
Waukesha
SERIES FOUR'
L7044GSI with ESM
VHPn ' Series Four
1120 -1680 BHP
Model L7044GSI with ESM
Turbocharged and Intercoded, Twelve Cylinder,
Foca-Cycle Gas Engine
SPECIFICATIONS
Cylinders
V (2
Piston Displacement
7040 cu. In.
(1151)
Bore & Stroke
9.375"x 8.5"
(238x216 mm)
Compression Ratio
8:1
Jacket Water
System Capacity
107 gal.
(405 L)
Luba Oil Capacity
90 gal
(340 1)
Starting System
125.150 psi air/gas
24(32 Velectric
Dry Weight
22,750Ib.
(10,320 kg)
CER'T'1r 101D
11: 1': 1' Ile. . Ili 1 / ilhr1.I)riH,(Rl-r: de'• 1:.:f'::•2l.'.`e 1:1 •. a:; ')2-3'_r. ,.rtlalh•it:r
AMERICAS • EUROPE ! CIS • MIDDLE EASY 1 NORTH AFRICA = AUSTRALASIA
EI IERFLEX
Quote:
Page:
Q4120204 U1X112
Fehruor} 14.201?
I.fls'Krtd
27 of 49
POWER RATINGS; L7044GSI VHP SERIES FOUR with ESM
Model
Brake Horsepower (kWb Output)
I.C. Water Inlet Temp.
°F (°C) (Ttra) C.R. 800 rpm 900 rpm 1000 rpm 1100 rpm 1200 rpm
17044GS1 130`(541 81 1120 (836) 1260 (940) 1400 (1044) 1540 (1149) 168 ii (1253)
Rating Standard; All models. Ratings are based on ISO 304611.1995 with mechan.cal efficiency of 907.. and auxiliary water temperature Tcsa (clause 10.1) as specified
above le tiled to ± 10' F (± 5' C) Ratings are also vald for SAE J1349, 855514, DIN6271 and AP1713-11C standard almosphene conditions
ISO Standard Power/Continuous Power Rating: The highest load and speed which can be applied 24 hours a day, seven days a week. 365 days pet year except
for normal me:nlenance It is permissible to operate the engkte at up to 10% overload, or maximum load indcaled by the intermittent rating, stuchever is tower. for
five hours in each 24 hour period,
AB natural gas ongne ratings are based on a fuel of 900 1310/111 (35.3 MJ;nm') SLHV value. with a 91 Waukesha Knock Index' -
For condtons or heels other than standard, the Waukesha Engine Sales Engineering Department
PERFORMANCE: L7044GS1 VHP SERIES FOUR with ESM
ct-
English 130°F I.C. Water Temperature
RPM
Power (Bhp)
B$FC(Blurbhp-hr)
NOx (grarns/bhp-hr)
CO (grans/bhp-hr)
NMHC (grarmibhp—hr)
BSFC (Btu/bhp-lir)
NOx (grams/bhp-hr)
CO (gramstbhphr)
NMHC(grams/bhp-.hr)
1200
1680
7755
12.7
138
036
7570
215
16
030
1000
1400
7580
122
12.0
036
7430
214
i6
0 30
CI 14
ri
Metric 54° C LC. Water Temperature
RPM
Power(kWb)
BSFC (kJerWhr)
NOx (g/nm')
CO (q/nm')
NMHC (grnmll
BSFC (g/nm')
NOx (9)0511)
CO Ohm)
NMHC (g/nm')
1200 1000
1253 1044
10973 10726
47 4.6
5.1 44
U 13 0.13
10712 10513
8.0 7.0
0.6 0
0.11 0.11
NOTES:
1) Fuel oonsump6on and exhaust em ssions are based on 180 304811.1995 standard reference conderoes and commercial dually natural gas of 900 Steil'
(35.38 M)/m' 125, V(0, 101.325))) saturated lower peal value, Waukesha Knock tndexs of St and 0.1/, methane content by volume. 150 3046)1-1995 standard
reference condltans are 77"F (25'0) ambient Temperature. 29.54 inches Hg (100 kPa) barometric pressure. 30% relative humidity (IkPat03 Inches Hg water vaior
pressure)
21 SI, exhaust omissions are corrected to 5% Oa (0"0 and 101.325 kPa).
3) Data s4ll vary due to variations in site coad:'ons, For conditions artdror fuels other than standard, consult the Waukesha Engine Sales Engineering Department
83.33'
(2117mm)
Waukesha
WAUKESHA ENGINE
DRESSER, INC.
1000 West St Paul Avenue
Waukesha. WI 531804999
Phone (262) 5473311 Fax (262) 5491795
waukcshaenginc. dresseecorn
Bulletin 7056 0102
142.75'
-4— (3626 mrn) 8-
a:
WAUKESHA ENGINE
DRESSER INDUSTRIAL PRODUCTS, B.V.
Farmsunterweg 43. Postbus 333
9900 AN Appingedam,The Netherlands
Phone (31) 596.652222 Fax (31) 596628111
Cons u4 your local Waukesha Dis tr1lsutor for system
eppseaaon assistance. The manufacturer reserves the
tight to change or modiy without notice. the design or
equipment spa ci5catlons as herein set forth without
Incurring any obligation either wkh respect to
equipment previously sold or in the process or
conslructlon except where olhtrwi5e specifically
guaranteed by the marrutaclaer.
Waukeslwa, Vi P. Series Fou. klx;aspi e, and WaukeshaKnak him aro eademarksiegistered tademaysolWarkesta Engne.Dresser, Inc.
11: 111.1) Iso).) .Itt' 1lt.. i_•} I1 (.rl+'It.Eh 1.1: .,. _ar_ _'1': s ler. ;•t; _v+.. __ . .
_ _ mlll: ,t ,a
AMERICAS , EUROPE/ GIS • MIDDLE FAST I NOT6TaH AFRICA • AUSTRALASIA
ENERFLEX
Quote:
Date:
costa mei:
Q412020 -I RI:1'02
Pchroor} 14.2f11?
Luenna
28 of 49
Certificate of Engineering Approval
Are Special Codes or Equipment Required for this Approval?
Approval Criteria
Ignition Timing: ESI 1
Carb Setting (Lambda or MAFR): 0.38°6 CO
When operating per the site conditions listed at 8290 feet elevation.
100F combustion air inlet temperature. and per the attached fuel
analysis. a ntaximuln continuous rating of 1450 BHP @ 1200 RPM with no
overload allowed is approved.
Based upon the site conditions and the fuel analysis provided. the engine
data at 100% load is:
Load (bhp): 1450
Speed: 1200 RPM
Overload: 0 %
BSFC (Btu/Bhp-hr): 8188 -0/+5°o
Induction Air (SCF1v1): 2174 ± 7 °o
Exhaust Flow (lb/hr): 10108 * 7 ° o
Exhaust Temp ( °F): 1168 ± 75°°
Heat to (Btu/br x 1000)
Jacket Water : 3568 f 8 °-o
Lube Oil: 541+8%
Intercooler: 266 ± 8 ° o
Total Exhaust: 3396 ± 8 °o
Radiation: 640 ± 30 °•o
Emissions:
NOx: 14.0 g/bhp-hr
CO: 11.9 g'bhp-hr
NMHC: 0.6 g/blip-hr
1r IL. +,'WI.' .I1 ln.. Wk.1/ ?lIk.1.1)s:1“rli.•1r.;,.1 • Ic.. -" :12••1:1\ _I2 __•r.
AMERICAS > EUROPE 1 CIS • MIDDLE EAST 1 NORTH AFRICA • AUSTRALASIA
n Ill. - 1 1
ENERFLEX
Quote:
1)a1t:
Costo II)tt:
When operating per the site conditions listed at 8290 feet elevation, 75F
combustion air inlet temperature, and per the attached fuel analysis. a
maximum continuous rating of 1610 BHP (i' 1200 RPM with no overload allowed
is approved.
Based upon the site conditions and the fuel analysis provided. the engine
data at 100°0 load is:
Load (bhp): 1610
Speed: 1200 RPM
Overload: 0 %
BSFC (Btu/Bhp-hr): 8055 -0/+5%
Induction Air (SCFM): 2375 f 7 %
Exhaust Flow (ib/lv-): 11042 ±7 ° o
Exhaust Temp ( °F): 1189 ± 75°'
Heat to (Btu/hr x 1000)
Jacket Water : 3746 ± 8 %
Lube Oil: 549 t 8 %
Intercooler: 230 ± 8 °.6
Total Exhaust: 3855 ± 8 00
Radiation: 742 ± 30 %
Emissions:
NOx: 14.0 g/bhp-Ill'
CO: 11.9 g/bhp-hr
NMHC: 0.6 g/bhp-hr
NOx emission at absolute humidity of 75 grains H20/1b of dry air.
Fuel must comply with the Gaseous Fuel Specification in effect at the
time of the SAA approval.
BSFC is stated in lower heating value (LHV) per IS03046.
Ignition timing determined by the Engine System Manager (ESM) map based
on load, speed, and WKI.
Q4120201121;1112
F bruof\ 1.1.2013
Eueatut
29 of.9
IIi.IIk 1:rt, ♦, 1.H•1', .Ir 1, 41.,L:It %•11. L:11,'• 1,.. N°: ♦1.1.. :1:,.�:.•�''oV .,11•.IIt,. ..111
AMERICAS • EUROPE i CIS • MIDDLE BAST / NORTH AFRICA . AUSTRALASIA
ENERFLEX
1412(1204 RI:� (12
Frhtu:tr14.21113
11:ur:urt
411 of 49
1:71 DCL
DCL America Inc
12620 I M moil. Sic At 6o% II 460. ituusion, 11 '7-045
h! $-74497.9159 lar. 11.11.6t5.5x5N / mmt iofo(dduncrice.com
LNG1NE DATA
Engine model r > Waukesha 7044GSI
Power 145011p
Fuer Pipeline NG
Exhaust Flow 10378
Exhaust Temperature
11731
CATALYST SYSTEM DATA
Catalyst Model 2-DC76-16
Catalyst Type NSCR
Number of Elements 2
Cell Density 300 cpsi
Approx. Dimensions See Drawing
Approx Weight 2300Lbs
Approx. Pressure Drop 6.5" w.c.
Connection Size Recommended 16" min
EMISSION REQUIREMENTS
Exhaust Gas Component
Engine Output (g-hhp/hrl Converter Outpu •hhpjhrl
NOX
12 .1
CO
12 2
NMNEIIC
1 .15
4‘,Thecatalyst model and volume selection is based upon the reduction requirements above.
_i-,_ Any variance in these requirements niay effect the price and model selection.
1 n.:IJ. 1 1 u•. 171: . 1 /: 1! •u . , 1.11,to 1 rl°9ltd•. • 1.1. ' 12' 0 1 1; (::. ,._•. •`_ ° v , ; u • 1f. .
AMERICAS • EUROPE? / CIS R MIDDLE EAST / NORTH AF'131CA • AUSTRALASIA
ENERFLEX
Quare: Q412020.1 121.:V02
ITxlc: Febrt, r 14.201?
('ututnlrl: f:nrnnn
Yu1 t: 31 of 49
,SII,IiNCI R SYSTEM DATA
Silencer Grade
Approx. Attenuation
oCL
DCL America Inc
12620 131 1960 it. Ser it Mt 1 560,11nuunn. T!( 7-'06S
1.1 811-K9'•9'59 l;er 111.615.585)4 1•nndl info(04clamlrica.cont
HOSPITAL
Hospital
35-40dHA
1)
s3 3,1 S 63 12i 2S0 500 IK
OC1AIr1IID(riga FREOZI Cya z,
2K 4K SK
1
In.:!'sI 11 ?� r.inln..1: Ir �u.,r.e1 :ct1.'I'jn)••• 1.... _ .'1':,I 3, :!:.,_•,-:.•__+ rr,11. 11.
AMERICAS + EUROPE / CIE < wool E EAST i NORTH AFRICA . AUSTRALASIA
1 .4
Attachment B
Table 1 Distance Extrapolation Worksheet
Site: Wolf Ranch Compressor Station (Encana)
Extrapolation
to 350 ft.
dBA1 =
D2=
D1 =
75
350
23
dB (A)
ft.
ft.
dBA2 =
51
dB (A)
(Noise Attenuation Rating of Enclosure) _
(COGCC Compliance Distance)
(Distance of Noise Attenuation Rating of Enclosure)
(Calculated dB (A) at Property Line)
Extrapolation
to 2,300 ft.
dBA1 =
D2 =
Di =
75
2300
23
dB (A)
ft. _
ft.
dBA2 =
35
dB (A)
(Noise Attenuation Rating of Enclosure)
(Nearest Property Line)
(Distance of Noise Attenuation Rating of Enclosure)
(Calculated dB (A) at Property Line)
as publlished in COGCC Rule 801
d8(A) Distance 2 = dB(A) Distance 1 - 20 x109 fo (Distance 2 /Distance 1)
FINAL
GEOTECHNICAL INVESTIGATION
WOLF RANCH COMPRESSOR STATION
GARFIELD COUNTY, COLORADO
June 17, 2013
Prepared For:
Ms. Stephanie Meany
Hunter Ridge Energy Services, LLC
143 Diamond Avenue
Parachute, CO 81635
Prepared By:
Yeh and Associates, Inc.
1525 Blake Avenue
Glenwood Springs, CO 81601
Phone (970) 384-1500
Fax (970) 384-1501
Project No. 213-087
)A
Wolf Ranch Compressor Station
Garfield County, Colorado Project No. 213-087
TABLE OF CONTENTS
1.0 PROJECT INFORMATION 1
1.1 Purpose and Scope 1
1.2 Proposed Construction 1
1.3 Site Conditions 1
1.4 Site Geology 2
2.0 SITE INVESTIGATION 2
2.1 Subsurface Investigation 2
2.2 Subsurface Conditions 3
2.2.1 Groundwater 4
2.3 Site Grading 4
3.0 SETTLEMENT 4
4.0 FOUNDATION RECOMMENDATIONS 5
4.1 Footing Foundations 5
4.2 Mat Foundations 6
5.0 SEISMIC CONSIDERATIONS 6
6.0 CONCRETE AND CORROSIVITY 7
7.0 LIMITATIONS 7
LIST OF TABLES
Table 1 — Structure/Test Hole Designations 2
Table 2 — Estimated Settlement 4
Table 2 — Seismic Design Parameters 6
Table 2 — Seismic Design Parameters for Site Class C 6
LIST OF FIGURES
Figure 1 —Approximate Site Location
Figure 2 — Approximate Test Hole Locations
Figure 3 — Drill Logs
Figure 4 — Drill Log Legend
Summary of Laboratory Test Results
Wolf Ranch Compressor Station
Garfield County, Colorado Project No. 213-087
1.0 PROJECT INFORMATION
1.1 Purpose and Scope
This report presents the results of our geotechnical investigation for the proposed Wolf Ranch
Compressor Station in northern Garfield County, Colorado (Figure 1). The investigation was
performed to provide recommendations for foundation design and construction of a gas
processing facility at this site. The purpose of this study was to evaluate geotechnical
characteristics of the on-site soils and bedrock and provide geotechnical recommendations for
the proposed construction.
The site investigation consisted of geologic reconnaissance and exploratory test hole drilling to
investigate subsurface conditions. Test hole drilling was observed by a representative of Yeh
and Associates. Samples obtained during the field exploration were examined by the project
personnel and representative samples were subjected to laboratory testing to determine the
engineering characteristics of materials encountered. This report summarizes our field
investigation, the results of our analyses, and our conclusions and recommendations based on
the proposed construction, site reconnaissance, subsurface investigation, and results of the
laboratory testing.
1.2 Proposed Construction
We understand the proposed construction will consist of multiple structures related to natural
gas production. The proposed structures will include but are not limited to a shop building, an
MCC building, slug catcher, glycol regeneration unit pad, compressors, pig launchers, discharge
meters, inlet filters, fuel gas skid, glycol contactors and dehydration filter pad and a future amine
plant. The structures will likely be supported on prefabricated steel bases supported by
concrete pad foundations or footings. From site plans dated May 14, 2013, provided by the
client, plans indicate cuts of up to 10 feet and fills of up to 22 feet will be necessary to achieve
an average finish pad elevation of approximately 8136 feet. Proposed cut and fill slopes will be
constructed at slopes of 3H:1 V.
1.3 Site Conditions
The proposed Wolf Ranch Compressor Station was approximately 22 road miles north and west
of Parachute, Colorado (Figure 1) and was located on the Roan Plateau in the northern
Piceance Basin of western Colorado, a major gas production area made up of high plateaus,
mesas, ridges and deep valleys. The proposed site was located on a north -south trending ridge
with the high point as a knob at an approximate elevation of 8149 feet. The site sloped down to
1 l'A
Wolf Ranch Compressor Station
Garfield County, Colorado Project No. 213-087
the north, west and south with moderate to strong slopes at grades of between 10 and 12
percent. The east face consisted of moderate to steep slopes at grades of between 27 and 39
percent. The site was accessed off Garfield County Road 403, approximately 1 mile north of
the "turkey track" intersection with County Road 401, north of the existing L24 496 compressor
and south of the existing Conoco/Phillips man camp. An existing two -track road was situated at
the south-southwest portion of the site. Existing vegetation included sage, scrub oak and other
natural brush and grasses.
1.4 Site Geology
The project site was located in the Piceance Basin of western Colorado, a structural basin that
is a major gas production area. The asymmetrical, arc -shaped basin is 100 miles long by 50
miles wide, is oriented northwest -southeast, and is deepest on the east edge. It is bounded
structurally on the northeast by the Axial Uplift, on the east by the White River Uplift/Grand
Hogback and the Elk Mountains, on the south by the Uncompahgre Uplift and on the west by
the Douglas Creek Arch.
Exposed in the project area was Tertiary age sedimentary rocks including the slopes and ledges
of light brown and gray siltstone and sandstone and slopes of siltstone and claystone of Unit D
of the Uinta Formation. The surficial deposits included alluvium and residuum of the erosional
surface of the Uinta Formation which included clay, silt, sand and gravel.
2.0 SITE INVESTIGATION
2.1 Subsurface Investigation
Eight test holes were drilled on May 23, 2013. Table 1 provides the structure investigated with
respect to the test hole location. Test hole locations were specified by Yeh and Associates and
were located using a hand held GPS. Location accuracy is only within the limits of the
methods/instrument used.
Table 1 — Structure/Test Hole Designations
„1-- Structure;
-Test; Hole Designation.
Shop Building
TH-1
MCC Building
TH-2
Inlet Slug catcher
TH-3
Glycol Regeneration Pad
TH-4
Compressors
TH-5, TH-6 and TH-7
Future Amine Plant
TH-8
2
VA
Wolf Ranch Compressor Station
Garfield County, Colorado Project No. 213-087
The locations of the test holes are presented in Figure 2. All test holes were advanced with a
CME 55 rubber track rig using 4 -inch continuous flight auger to pre -determined depths where a
modified California or split -spoon sampler was used to record blow counts and obtain samples.
Bulk samples were also obtained at depths indicated on test hole logs presented on Figure 3.
To perform the modified California penetration resistance tests, a 2.0 -inch inside diameter
sampler was seated at the bottom of the test hole, then driven up to 12 inches with blows of a
standard hammer weighing 140 pounds and falling a distance of 30 inches utilizing a "auto"
hammer (ASTM D1586). The number of blows (Blow Count) required to drive the sampler 12
inches or a fraction thereof, constitutes the N -value. The N -value, when properly evaluated, is
an index of the consistency or relative density of the material tested. Test hole logs and legend
are presented on Figures 3 and 4.
2.2 Subsurface Conditions
Subsurface conditions generally consisted of occasional topsoil over silty and clayey sand
underlain by weathered to comparatively unweathered shale and/or sandstone bedrock.
Differentiation between the topsoil and natural silty and clayey sand was difficult and therefore,
where encountered topsoil depths were approximated. Hard to very hard shale and/or
sandstone bedrock was encountered in all test holes at depths of between 0.5 and 3.5 feet from
existing grades. The bedrock was occasionally cemented and silty. Practical drill rig refusal
was encountered in all test holes except TH-6 and TH-7.
Three shale bedrock samples tested had 65 to 76 percent fines (material passing the No. 200
sieve). Atterberg limit testing on these same samples indicated liquid limits of 37 to 41 percent
and plastic indices of 16 to 23 percent. Two sandstone samples tested had 11 and 42 percent
fines and both samples were non -liquid and non -plastic. One sandstone sample had an
unconfined compressive strength of 9950 psf.
Results of the laboratory testing are summarized in the Summary of Laboratory Test Results.
Chemical testing was also performed, and the results are presented under section 6.0.
3
!A
Wolf Ranch Compressor Station
Garfield County, Colorado Project No. 213-087
2.2.1 Groundwater
Groundwater was not encountered during drilling. Delayed groundwater levels were not
possible. Variations in groundwater conditions may occur seasonally. The magnitude of the
variation will be largely dependent upon the amount of spring snowmelt, duration and intensity
of precipitation, site grading changes, and the surface and subsurface drainage characteristics
of the surrounding area.
2.3 Site Grading
Cuts of up to 10 feet and fills of up to 22 feet are planned for the proposed construction. Based
on drilling and our observations, we believe that material can be excavated by conventional
construction equipment; however, hard to very hard shale and/or sandstone bedrock,
occasionally cemented, may need to be excavated by means of heavy ripping and/or blasting.
We believe that proposed fill and cut slopes of 2H:1V or flatter, are appropriate for the soil
conditions at the site.
The on-site cut soils can be used in site grading fills provided the material is substantially free of
organic material, debris and particles are no larger than 6 inches. Areas to receive fill should be
stripped of vegetation, organic soils and debris. Topsoil is not recommended for fill material.
Fill should be placed in thin, loose lifts of 8 inches thick or less. We recommend fill materials be
moisture conditioned to within 2 percent of optimum moisture content and compacted to at least
95 percent of maximum standard Proctor dry density (ASTM D 698). Placement and
compaction of fill should be observed and tested by a representative of the geotechnical
engineer.
3.0 SETTLEMENT
We believe that improvements placed in areas where transitions from cut to fill or Targe
variations in fill depths occur could result in differential settlement of structures or flatwork.
Based on review of the grading plans, we believe improvements that could be affected would be
the west portion of the future Amine Plant. We believe movements in the compressor area
would be within tolerable limits. Provided the fill is placed according to the specifications above,
we would estimate differential and total movements as indicated the table below. Movement
tolerances should be determined by the structural engineer. Total and differential movements
cannot be eliminated. In order to decrease differential and total movements, if desired, several
alternatives could be utilized. Further discussion and recommendations for alternatives can be
4
Wolf Ranch Compressor Station
Garfield County, Colorado
Project No. 213-087
provided, if needed. The table below provides anticipated differential and total movement for
selected areas, equipment and or structures constructed in cut/fill, fill and cut areas.
Table 2 — Estimated Settlement
Area/�qul rnent/Sfrtc bre
Estimated
Total
Estimated Differential:
s
Settlement
Settlement
Future Amine Plant
Approximately 1 -inch
Less than 1 -inch
All other areas, equipment
and structures
1 -inch or less
Less than 1 -inch
4.0 FOUNDATION RECOMMENDATIONS
We believe that the site is favorable for proposed construction. We believe all structures and
equipment can be supported by a footing, pad or mat foundations placed on natural soils,
bedrock, or controlled fill. We believe that consolidation of the controlled fill would be low and
therefore, a low risk of associated foundation movement as discussed in section 3.0 above.
Foundation recommendations for structures supported by natural soils, bedrock or controlled fill
are presented below.
4.1 Footing Foundations
Foundations should be constructed on undisturbed, natural soils, bedrock or controlled fill.
Loose, disturbed soils encountered at foundation level should be removed and the foundation
should be extended to natural soils, bedrock or undisturbed controlled fill. We recommend fill
be placed in accordance with the specifications presented in section 2.3. Placement and
compaction of fill should be observed and tested by a representative of a geotechnical engineer.
1. Foundations can be designed for a maximum allowable soil pressure of 3,000 psf.
2. Resistance to sliding at the bottom of the mat foundation can be calculated based on a
coefficient of friction of 0.35. Passive pressure against the side of the footing can also
be considered for the sliding resistance if it is properly compacted. Passive pressure
can be estimated based on an equivalent fluid density of 350 pcf for a level backfill.
3. The soils below foundations should be protected from freezing. We recommend the
bottom of foundations be constructed at least 3.5 feet below finished exterior grade or as
required by local municipal code.
4. All foundation excavations should be observed by a representative of the geotechnical
engineer prior to placement of concrete.
5
IA
Wolf Ranch Compressor Station
Garfield County, Colorado Project No. 213-087
4.2 Mat Foundations
Foundations should be constructed on undisturbed, natural soils, bedrock or controlled fill.
Loose, disturbed soils encountered at foundation level should be removed and the foundation
should be extended to natural soils, bedrock or undisturbed controlled fill. We recommend fill
be placed in accordance with the specifications presented in section 2.3. Placement and
compaction of fill should be observed and tested by a representative of a geotechnical engineer.
1. Mat foundations placed on the undisturbed natural soils, bedrock and/or controlled fill
can be designed for a maximum allowable soil pressure of 3,000 psf or vertical subgrade
modulus of 250 psi times the correction factor, cp. The correction factor is based on the
mat width and is determined by the equation: cp. 1/ ((B+1)/2B)-2.
2. Mat foundations can be designed for dynamic loading using a shear modulus (G) of
10,000 psi and a Poisson's ratio (p) of 0.25.
3. The soils below foundations should be protected from freezing. We recommend the
bottom of foundations be constructed at least 3.5 feet below finished exterior grade or as
required by local municipal code.
4. All foundation excavations should be observed by a representative of the geotechnical
engineer prior to placement of concrete.
5.0 SEISMIC CONSIDERATIONS
The project is located at approximate latitude 39.692 and longitude -108.122. The site is
classified as Site Class C. The Peak Ground Acceleration (PGA), and the short- and long -
period spectral acceleration coefficients (SS and 81 respectively) for the site were obtained
using the USGS 2007 Seismic Parameters for an event with a 7% Probability of Exceedance
(PE) in 75 years and a Site Class B (reference site). An event with the above probability of
exceedance has a return period of about 1,000 years. The values were adjusted using Site
Factors for Site Class C in accordance with 2006 International Building Code, Table No.
1613.5.3 (1) and (2). The seismic parameters for this site are shown in the tables below.
Table 3 — Seismic Design Parameters
PGA (0.0 sec)
r, Ss (0.2 sec)
51.(1.0 sec)
0.084
0.171
0.041
6
Wolf Ranch Compressor Station
Garfield County, Colorado
Project No. 213-087
Table 4 — Seismic Design Parameters for Site Class C
As(0 0 sec)
a a
SDs (0 0.2sec
-.
r SD1 (1.0 sec
:... �::.
Setsrrlo
m
,. :Zone --'
0.100 g
0.205 g
0.070 g
1
6.0 CONCRETE AND CORROSIVITY
The concentration of water-soluble sulfate measured in the laboratory on selected samples was
between 0.014 and 0.028 percent. This concentration of water-soluble sulfate represents a
negligible/low (Class 0 exposure) degree of sulfate attack on concrete exposed to this material.
The degree of attack is based on a range of 0.00 to less than 0.10 percent as presented in the
American Concrete Institute Guide to Durable Concrete. Due to the negligible/low degree
indicated by the test results, no special requirements for concrete are necessary for Class 0
exposure.
The pH and electrical resistivity was also determined for the same selected samples. Test
results measured pH values of between 8.0 and 8.2, considered slightly basic. The resistivity
measurement was between 1316 and 1379 ohm -centimeters and the water-soluble chloride
was between 0.0008 and 0.0009 percent. See the Summary of Laboratory Test Results. A
qualified corrosion engineer should review this data to determine the appropriate level of
corrosion protection.
7.0 LIMITATIONS
This study was conducted in accordance with generally accepted geotechnical engineering
practices in this area for use by the client for design purposes. The conclusions and
recommendations submitted in this report are based upon the data obtained from exploratory
test holes, field reconnaissance and anticipated construction. The nature and extent of
subsurface variations across the site may not become evident until excavation is performed. If
during construction, conditions appear to be different from those described herein; this office
should be advised at once so reevaluation of the recommendations may be made. We
recommend on-site observation of excavations by a representative of the geotechnical
engineer.
7
IA
Wolf Ranch Compressor Station
Garfield County, Colorado Project No. 213-087
The scope of services for this project did not include, specifically or by implication, any
environmental or biological (e.g., mold, fungi, and bacteria) assessment of the site or
identification or prevention of pollutants, hazardous materials or conditions or biological
conditions. If the owner is concerned about the potential for such contamination, conditions or
pollution, other studies should be undertaken.
The report was prepared in substantial accordance with the generally accepted standards of
practice for geotechnical engineering as exist in the site area at the time of our investigation.
No warranties, express or implied, are intended or made.
Respectfully Submitted:
YEH AND ASSOCIATES, INC.
Keith E. Asay
Staff Engineer
8
Reviewed by:
Richard D. Johnson, P.E.
Project Manager
IA
it%lJ� s�
}
Topographic maps created with
TOPOI®@ National Geographic
)A
Yeh and Associates, Inc.
Consulting Engineers & Scientists
DRAWN BY. SW
DATE. 6/10/2013
CHECKED BY. RDJ
DATE. 6/10/2013
DESIGNED FOR. Hunter Ridge Energy Services, LLC
PROJECT.
Wolf Ranch Compressor Station
PROJECT NUMBER. 213-087
SCALE
HORIZ. NOT TO SCALE VERT. NOT TO SCALE
Approximate
Site Location
FIGURE
1
P00L
_-�scahw
1 �
Pr
/
~Fvvtl sMate bu�lni.d
Peed .*1 U&P>S
-dna 041
�d
.PI
P d olw^�^15
lnvy-Py 1'°4 -Z
pxaabV
01' P911 Na'<O.91
ca a,1s spa
2
F-
WOW
SOY I. v.
yIIII1I1III11I=
F– wEL" A•
�
CPM M12! 4.0 ' w�aNeV ivalq—
iuwN,
a or
....F4/ =by
Yq
M Jel
Feud IMP—
1
it
.ucvac P00
<,wauq )
teL
_. I'MNWW PNN
UU1- O 2
_ o ~ Io
P11 MN
'N'd '419 'M%b "II NO11030
NOLLYIS 1100030&403 limn 14*
Z
3
0
fi
Approximate test hole locations
F "4
Ln O N O 10 O 10 O 10 O
a r r r 01 r v O O a
cd c0 co co- W co- co- O W of'O d
Wolf Ranch Compressor Station
Project Number: 213-087 Figure No. 3
h 'a
ates approximate propose
rm plan set provided by cli
a INDo–
H90I
W
o
I
in. co
a o
is Dashed line
pad elevatio:
II- a
r
F
C
1
I -
o "a
o
1111.—.1111
NW" �/�
I-
aaI
1
I
w
s I a
l
1 e
3
YEH AND ASSOCIATES, INC.
GEOTECHNICAL ENGINEERING CONSULTANTS
El I
1
e
r o
1
to. Lg Io
1—
o =
Ir
1
w
0
0
0
to
OM
IN►��F
2^
f. `o
! »All
i
W
N
lig
oc n 9
1
1
V V co co_ N N_ O O 0_ O_
O O O O co- W O O m W
(u) UNE A013
ELL 119100'IOU rd0'SOOl 0N11109 de0-ELZ 3ZISV NOIIVA3l3 A8 S30N3d
I' YEH AND ASSOCIATES, INC.
GEOTECHNICAL ENGINEERING CONSULTANTS
Project: Wolf Ranch Compressor Station
Project Number: 213-087
Legend for Symbols Used on Borehole Logs
Sample Types
Bulk sample was obtained from auger cuttings at the depths indicated.
Modified California Sampler. The symbol 16/12 indicates that 16 blows from a 140 pound
hammer falling 30 inches was used to drive 2 -inch I.D. sampler 12 inches.
.Split Spoon Sampler. The symbol 15/12 indicates that 15 blows from a 140 pound hammer
falling 30 inches was used to drive 1.5 -inch I.D. sampler 12 inches.
Other Symbols
1 Indicates practical drill rig refusal.
Indicates approximate elevation of proposed pad from plans provided by client.
Soil Lithology
Topsoil, brown, dark brown.
SAND, clayey, slightly moist, medium dense, brown (SC).
SAND, silty to gravelly, slightly moist, medium dense to very
dense, brown (SM).
Bedrock Lithology
Weathered Sandstone Bedrock, medium hard, slightly moist, white, light brown, rust.
SANDSTONE Bedrock, occasionally cemented, hard to very hard, slightly moist, white, light
brown, rust.
SHALE Bedrock, cemented, hard to very hard, slightly moist, white, light brown, rust.
NOTES:
1. Test holes were drilled on May 23, 2013 with 4 -inch continuous flight auger.
2. Groundwater was not encountered.
3. Test hole descriptions are subject to explanations contained in this report.
4. Elevations were estimated from topography by others.
Figure 4
Summary of Laboratory Test Results
Wolf Ranch Compressor Station
Project Nam
O
Z
v
0
Soil Description
(SHALE Bedrock
SANDSTONE Bedrock, silty
SHALE Bedrock
SANDSTONE Bedrock
SANDSTONE Bedrock
SANDSTONE Bedrock
SHALE Bedrock
Unconfined
Compressive
Strength
(pst)
m
0)
0)
2
O.
N
CO
O
CO
Resistivity
(ohm -cm)
1379
m
m 01
m aa--
m2 `o0
0 L V
co U
8000'0
o
N N
`m a
m i w o
o=
co co
0.028
0.014
Atterberg Limits
E
co
Z
N
Z
((0
J
d
n
0-
Zr
W
Z
N
a
Z
a
Z
Grain Size Analysis
m0„
4i '
LL v
N
n
v
-
c
coo
co "
d
cao
0..A ..
.N
o a
z
0
107
Moisture
Content
(%)
n
d
CO
d
lA
N
m
12.5
Sample Location
U)
E 4)
E -.
cor
CO
Y
>
m
CA
Y
>
m
Y
3
m
CA
CA
m
Depth (ft)
10 to 14
9 to 13
w
2
.a-
Ti-
v
5 to 9
2 2 m
""i
F
2
H
a
1
F
co
2
F
Y
2
F
ID
2
f
r
2
F
CO
2
4-
N
a
E
co
N
co
C
O
0
m - m
Q n
a c c
c c
co) N N
U U U
a a -o
c c C
¢moo.
U Z Z