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Home My WebLink About2.15 Oxy Pond 10 gen Building Noise Assessment 760 Horizon Drive, Suite 102 TEL 970.263.7800 Grand Junction, CO 81506 FAX 970.263.7456 www.olssonassociates.com March 31, 2014 Chris Clark OXY USA WTP LP 760 Horizon Drive, Suite 101 Grand Junction, CO 81506 Subject: Noise Analysis – Pond 10 Generator Building Garfield County, Colorado Dear Mr. Clark, At the request of OXY USA WTP LP (Oxy) Olsson Associates (Olsson) has conducted an assessment of noise generating equipment installed at the Pond 10 Facility. This equipment, although currently installed at the facility, is not in operation. The intent of this assessment was to review the equipment specifications provided by the manufacturer (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. Figure 1 shows the facility location, noise generating equipment location and distance to compliance point(s). Noise Generating Equipment The noise generating equipment is one generator enclosed in a fabricated enclosure. Compliance Point(s) The COGCC Rule 802 uses the property line or 350 feet from the noise generating equipment, whichever is greater, as the compliance point for oil and gas operations. The nearest property boundary is 570 feet south of the noise generating equipment. Therefore Olsson has used 570 feet away from the noise generating equipment as the compliance point. Olsson has also calculated the sound pressure levels at 2,100 feet from the noise generating equipment to ensure that noise would not be a nuisance at the nearest occupied structure(s), located over 2,100 feet to the south. Maximum Permissible Noise Levels 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 applicable. The night time maximum permissible noise limit is 65 db(A) for light industrial areas. 013-0656 Noise Analysis - Oxy Pond 10 Generator Building 03/31/14 The night time maximum permissible noise limit is 50 dB(A) for residential areas. This noise pressure limit has been used to ensure that the noise generating equipment would not be a nuisance at the nearest occupied structure(s). Calculated Sound Pressure Levels The generator/enclosure is rated to a sound pressure level of 81.78 dB(A) at 15 meters (42.9 feet) by the manufacturer (see Attachment A). This sound pressure level includes sound generated from engine mechanics and exhaust and also accounts for building attenuation. Olsson has assessed the potential noise level at 570 feet using the noise/distance extrapolation equation provided in COGCC Rule 802 and the generator/enclosure rating. The calculated sound pressure level at 570 feet from the equipment will be approximately 60.5 dB(A) (see Attachment B). Olsson has also assessed the potential noise level at 2,100 feet using the noise/distance extrapolation equation and the enclosure. The calculated sound pressure level at 2,100 feet from the equipment will be approximately 49.2 dB(A) (see Attachment B). Conclusion The noise pressure calculation shows that the levels should be below the light industrial limit at 570 feet from the equipment and below the residential limit at the nearest occupied structure. These sound pressure levels are calculated and actual noise levels should be measured during equipment operation to insure regulatory compliance. Statement of Qualification I am a multi-disciplinary Project Manager at Olsson Associates. I have coordinated many Noise Control Regulation Compliance Assessments over 5 years at existing and planned noise generating equipment installations in Colorado. If you have any questions regarding this assessment, please contact me at 970-263-7800. Sincerely, Olsson Associates Ken Kreie Senior Scientist Enclosures – Attachment A - Generator Building Noise Specifications Attachment B - Table 1 Noise Attenuation Calculations Cc: Project File Approximately 2,113 feet from Generator to Occupied Structure Pond 10 Generator Approximately 570 feet from Generator to property boundary 213 - CONN CREEK RD OXY USA WTP LPOXY USA WTP LP 760 Horizon Drive, Suite 101 Grand Junction, CO 81506 Pond 10 Generator Adjacent Property OXY USA WTP LP Pond 10 Pond 10 Access Road Oxy Responsible Road Unimproved Public Road Gravel Public Road Paved Public Road Revised: March 31, 2014 Pond 10 Generator Noise Assessment - Occupied Structure 00.0250.050.0750.1Miles Garfield County, Colorado ATTACHMENT A SOUND ESTIMATE C-32 - 1000KW 85@1 DISCHARGE 63 HZ125 HZ250 HZ500 HZ1000 HZ2000 HZ4000 HZ8000 HZ0VERALL ENGINE-MECH AT 1 METER87.2091.2092.2094.2093.2092.2076.2069.20 DB(A)61.0075.1083.6091.0093.2093.4077.2068.1097.68 AT 7 METERS80.8079.8080.8081.8082.8082.8075.8065.80 DB(A)54.6063.7072.2078.6082.8084.0076.8064.7087.67 AT 15 METERS77.3076.3079.3078.3076.3075.3070.3058.30 DB(A)51.1060.2070.7075.1076.3076.5071.3057.2081.66 ENGINE-EXH AT 1 METER102.50112.50113.20112.50105.50103.20101.9082.30 DB(A)76.3096.40104.60109.30105.50104.40102.9081.20113.03 AT 7 METERS93.20102.8097.8097.5092.2091.2091.2083.30 DB(A)67.0086.7089.2094.3092.2092.4092.2082.2099.65 AT 15 METERS86.6096.2091.2090.9085.6084.6084.6076.60 DB(A)60.4080.1082.6087.7085.6085.8085.6075.5093.05 TOTAL ATTEN0.000.000.000.000.000.000.000.00 AT 1 METER61.0075.1083.6091.0093.2093.4077.2068.1097.68 AT 7 METERS54.6063.7072.2078.6082.8084.0076.8064.7087.67 AT 15 METERS51.1060.2070.7075.1076.3076.5071.3057.2081.66 SP-RCSI-2216-0820.0030.0037.0035.0028.0025.0023.0026.00 TOTAL ATTEN20.0030.0037.0035.0028.0025.0023.0026.00 AT 1 METER56.3066.4067.6074.3077.5079.4079.9055.2084.45 AT 7 METERS47.0056.7052.2059.3064.2067.4069.2056.2072.65 AT 15 METERS40.4050.1045.6052.7057.6060.8062.6049.5066.04 2" STEEL WALL17.0020.0022.0032.0042.0050.0057.0058.00 MECH 1 M44.0055.1061.6059.0051.2043.4020.2010.1064.38 MECH 7 M37.6043.7050.2046.6040.8034.0019.806.7052.88 MECH 15 M34.1040.2048.7043.1034.3026.5014.30(0.80)50.44 TOTAL SOUND AT 1 METER62.3375.6983.7391.0993.3293.5781.7768.32 AT 7 METERS55.3764.5372.2778.6582.8684.0977.5065.27 AT 15 METERS51.5360.6470.7475.1376.3676.6271.8557.88 DB(A) TOTAL 1 METER97.88 7 METERS87.80 15 METERS81.78 NOTE: THESE CALCULATIONS ARE BASED ON SOUND LEVEL DATA PROVIDED BY THE ENGINE / GENERATOR MANUFACTURER, AND SOUND ATTENUATION CHARACTERISTICS SUPPLIED BY THE EXHAUST SILENCER, PANEL WALL AND LOUVER MANUFACTURERS. ACTUAL SOUND LEVELS MAY VARY BASED ON INTERACTION OF COMPONENTS AND SITE CONDITIONS. G3412C GAS ENGINE TECHNICAL DATA ENGINE SPEED: 1800FUEL: COMPRESSION RATIO: 11.4:1FUEL SYSTEM:LPG IMPCO AFTERCOOLER - MAX. INLET (°F):130 JACKET WATER - MAX. OUTLET (°F):210 FUEL PRESS. RANGE (PSIG):1.5 - 5.0 COOLING SYSTEM:JW+OC, AC MIN. METHANE NUMBER:80 IGNITION SYSTEM:EIS RATED ALTITUDE (FT):4922 EXHAUST MANIFOLD:WCAT AIR TO TURBO. TEMP. (°F):77 COMBUSTION:LOW EMISSIONNOx EMISSION LEVEL:1.9 g/bhp-hr FUEL LHV (BTU/SCF):905 APPLICATION: 60 Hz GENSET NOTESLOAD100%75%50% ENGINE POWER(WITHOUT FAN)(1) BHP637478318 GENERATOR POWER(WITH MECH FAN)(2)EKW375259154 ENGINE EFFICIENCY(ISO 3046/1)(3)%37.035.432.8 ENGINE EFFICIENCY(NOMINAL)(3)%36.334.732.2 THERMAL EFFICIENCY(NOMINAL)(4) %42.444.650.9 TOTAL EFFICIENCY(NOMINAL)(5)%78.679.383.1 FUEL CONSUMPTION(ISO 3046/1)(6)BTU/bhp-hr 6887 71927753 FUEL CONSUMPTION(NOMINAL)(6)BTU/bhp-hr702173327904 AIR FLOW (77 °F, 14.7 psi)(7)SCFM13541047673 AIR FLOW(7)lb/hr600346412983.00 COMPRESSOR OUT PRESSUREin. HG (abs)66.363.247.4 COMPRESSOR OUT TEMPERATURE°F286265200 AFTERCOOLER AIR OUT TEMPERATURE°F148145140 INLET MAN. PRESSURE(8)in. HG (abs)59.552.947.8 INLET MAN. TEMPERATURE(MEASURED IN PLENUM)(9) °F148145140 TIMING(10)°BTDC 272727 EXHAUST STACK TEMPERATURE(11)°F700700727 (12)CFM315324401616 EXHAUST MASS FLOW(12) lb/hr622948183110 NOx (as NO2)(13) g/bhp-hr1.925.4 CO(14) g/bhp-hr1.931.962.05 THC (molecular weight of 15.84)(14) g/bhp-hr5.355.875.05 NMHC (molecular weight of 15.84)(14) g/bhp-hr0.80.880.76 EXHAUST O2(15) % DRY8.78.56.9 LAMBDA(15) 1.68 1.661.48 LHV INPUT(16)BTU/min745385837841956 HEAT REJECTION TO JACKET (JW)(17) (22) BTU/min189371602113908 HEAT REJECTION TO ATMOSPHERE(18)BTU/min298223351678 HEAT REJECTION TO LUBE OIL (OC)(19) (22)BTU/min299425332199 HEAT REJECTION TO EXHAUST (LHV to 77°F)(20)BTU/min18962147759862 HEAT REJECTION TO EXHAUST (LHV to 350°F)(20)BTU/min964774675236 HEAT REJECTION TO A/C (AC)(21) (23)BTU/min 36262436790 CONDITIONS AND DEFINITIONS ENGINE RATING IS WITH 2 ENGINE DRIVEN WATER PUMPS. FOR NOTES INFORMATION CONSULT PAGE THREE. DM5444-0203-Mar-09PAGE 1 OF 3 ENGINE RATING OBTAINED AND PRESENTED IN ACCORDANCE WITH ISO 3046/1STD. REF. CONDITIONS OF 77°F, 29.6 IN HG BAROMETRIC PRESSURE, 500 FT ALTITUDE). NO OVERLOAD PERMITTED AT RATING SHOWN. CONSULT ALTITUDE CHARTS FOR APPLICATIONS ABOVE MAXIMUM RATED ALTITUDE AND/OR TEMPERATURE. EMISSION LEVELS ARE BASED ON THE ENGINE OPERATING AT STEADY STATE CONDITIONS AND ADJUSTED TO THE SPECIFIED NOx LEVEL AT 100% LOAD. EMISSION TOLERANCES SPECIFIED ARE DEPENDANT UPON FUEL QUALITY. METHANE NUMBER CANNOT VARY MORE THAN ± 3. PUBLISHED PART LOAD DATA MAY REQUIRE ENGINE ADJUSTMENT. NAT GAS HEAT BALANCE DATA EMISSIONS DATA ENGINE DATA RATING AND EFFICIENCY EXHAUST GAS FLOW (@ stack temp.) G3412C GAS ENGINE TECHNICAL DATA 303540455055606570758085-100 --------232527 000000001.001.001.00 1301.001.001.000.980.940.910.870.840.810.770.740.710.68 1201.001.001.001.000.960.920.890.850.820.790.760.730.70 AIR 1101.001.001.001.000.980.940.900.870.830.800.770.740.71 TO 1001.001.001.001.000.990.960.920.880.850.820.780.750.72 TURBO 901.001.001.001.001.000.970.940.900.860.830.800.760.73 801.001.001.001.001.000.990.950.920.880.850.810.780.75 (°F)701.001.001.001.001.001.000.970.930.900.860.830.790.76 601.001.001.001.001.001.000.990.950.910.880.840.810.78 501.001.001.001.001.001.001.000.970.930.900.860.830.79 0100020003000400050006000700080009000100001100012000 ALTITUDE (FEET ABOVE SEA LEVEL) 1301.491.571.651.741.831.911.911.911.911.911.911.911.91 1201.391.471.551.641.721.801.801.801.801.801.801.801.80 AIR1101.291.371.451.531.621.701.701.701.701.701.701.701.70 TO1001.191.271.351.431.511.591.591.591.591.591.591.591.59 TURBO901.091.171.251.331.411.491.491.491.491.491.491.491.49 801.001.071.151.221.301.381.381.381.381.381.381.381.38 (°F)701.001.001.041.121.201.271.271.271.271.271.271.271.27 601.001.001.001.021.101.171.171.171.171.171.171.171.17 501.001.001.001.001.001.061.061.061.061.061.061.061.06 0100020003000400050006000700080009000100001100012000 ALTITUDE (FEET ABOVE SEA LEVEL) 100% Load DatadB(A)(dB) 3.297.787.291.292.294.293.292.276.269.2 22.9 87.780.879.880.881.882.882.875.865.8 49.281.777.376.379.378.376.375.370.358.3 4.9113.0102.5112.5113.2112.5105.5103.2101.992.1 22.999.793.2102.897.897.592.291.291.283.3 49.293.086.696.291.290.985.684.684.676.6 Overal SPL63 Hz125 Hz250 Hz500 Hz1 kHz2 kHz4 kHz8 khz Octave Band Center Frequency (OBCF) FUEL USAGE GUIDE: This table shows the derate factor required for a given fuel. Note that deration occurs as the methane number decreases. Methane number is a scale to measure detonation characteristics of various fuels. The methane number of a fuel is determined by using the Caterpillar Methane Number Calculation program. ALTITUDE DERATION FACTORS: This table shows the deration required for various air inlet temperatures and altitudes. Use this information along with the fuel usage guide chart to help determine actual engine power for your site. ACTUAL ENGINE RATING: It is important to note that the Altitude/Temperature deration and the Fuel Usage Guide deration are not cumulative. They are not to be added together. The same is true for the Low Energy Fuel deration (reference the Caterpillar Methane Number Program) and the Fuel Usage Guide deration. However, the Altitude/Temperature deration and Low Energy Fuel deration are cumulative; and they must be added together in the method shown below. To determine the actual power available, take the lowest rating between 1) and 2). 1) (Altitude/Temperature Deration) + (Low Energy Fuel Deration) 2) Fuel Usage Guide Deration Note: For NA's always add the Low Energy Fuel deration to the Altitude/Temperature deration. For TA engines only add the Low Energy Fuel deration to the Altitude/Temperature deration whenever the Altitude/Temperature deration is less than 1.0 (100%). This will give the actual rating for the engine at the conditions specified. AFTERCOOLER HEAT REJECTION FACTORS (ACHRF): Aftercooler heat rejection is given for standard conditions of 77°F and 500 ft altitude. To maintain a constant air inlet manifold temperature, as the air to turbo temperature goes up, so must the heat rejection. As altitude increases, the turbocharger must work harder to overcome the lower atmospheric pressure. This increases the amount of heat that must be removed from the inlet air by the aftercooler. Use the aftercooler heat rejection factor (ACHRF) to adjust for ambient and altitude conditions. Multiply this factor by the standard aftercooler heat rejection. Failure to properly account for these factors could result in detonation and cause the engine to shutdown or fail. SOUND DATA: Data determined by methods similar to ISO Standard DIS-8528-10. Accuracy Grade 3. SPL = Sound Pressure Level. DM5444-02 27 FUEL USAGE GUIDE CAT METHANE NUMBER IGNITION TIMING PAGE 2 OF 303-Mar-09 FREE FIELD MECHANICAL & EXHAUST NOISE Free Field Exhaust Free Field Mechanical DISTANCE FROM THE ENGINE (FEET) DISTANCE FROM THE ENGINE (FEET) DERATION FACTOR 1.00 ALTITUDE DERATION FACTORS AFTERCOOLER HEAT REJECTION FACTORS (ACHRF) G3412C GAS ENGINE TECHNICAL DATA NOTES 1 ENGINE RATING IS WITH 2 ENGINE DRIVEN WATER PUMPS. TOLERANCE IS ± 3% OF FULL LOAD. 2 GENERATOR POWER DETERMINED WITH AN ASSUMED GENERATOR EFFICIENCY OF 93% AND POWER FACTOR OF 0.8 [GENERATOR POWER = ENGINE POWER x GENERATOR EFFICIENCY]. 3ISO 3046/1 ENGINE EFFICIENCY TOLERANCE IS (+)0, (-)5% OF FULL LOAD % EFFICIENCY VALUE. NOMINAL ENGINE EFFICIENCY TOLERANCE IS ± 3% OF FULL LOAD % EFFICIENCY VALUE. 4THERMAL EFFICIENCY: JACKET HEAT + LUBE OIL HEAT + EXH. HEAT TO 350°F. 5TOTAL EFFICIENCY = ENGINE EFF. + THERMAL EFF. TOLERANCE IS ± 10% OF FULL LOAD DATA. 6 ISO 3046/1 FUEL CONSUMPTION TOLERANCE IS (+)5, (-)0% OF FULL LOAD DATA. NOMINAL FUEL CONSUMPTION TOLERANCE IS ± 3 % OF FULL LOAD DATA. 7UNDRIED AIR. FLOW TOLERANCE IS ± 5 % 8INLET MANIFOLD PRESSURE TOLERANCE IS ± 5 % 9INLET MANIFOLD TEMPERATURE TOLERANCE IS ± 9°F. 10TIMING INDICATED IS FOR USE WITH THE MINIMUM FUEL METHANE NUMBER SPECIFIED. CONSULT THE APPROPRIATE FUEL USAGE GUIDE FOR TIMING AT OTHER METHANE NUMBERS. 11EXHAUST STACK TEMPERATURE TOLERANCE IS (+)63°F, (-)54°F. 12 WET EXHAUST. FLOW TOLERANCE IS ± 6 % 13NOX VALUES ARE SET POINTS AND WILL VARY WITH OPERATING CONDITIONS. 14CO, CO2, THC, and NMHC VALUES ARE "NOT TO EXCEED". 15O2% TOLERANCE IS ± 0.5; LAMBDA TOLERANCE IS ± 0.05. LAMBDA AND O2 LEVEL ARE THE RESULT OF ADJUSTING THE ENGINE TO OPERATE AT THE SPECIFIED NOX LEVEL. 16LHV INPUT TOLERANCE IS ± 3%. 17HEAT REJECTION TO JACKET TOLERANCE IS ± 10 % OF FULL LOAD DATA, BASED ON TREATED WATER. 18HEAT REJECTION TO ATMOSPHERE TOLERANCE IS ± 50% OF FULL LOAD DATA, BASED ON TREATED WATER. 19 HEAT REJECTION OF LUBE OIL TOLERANCE IS ± 20% OF FULL LOAD DATA, BASED ON TREATED WATER. 20HEAT REJECTION TO EXHAUST TOLERANCE IS ± 10% OF FULL LOAD DATA, BASED ON TREATED WATER. 21HEAT REJECTION TO A/C TOLERANCE IS ± 5 % OF FULL LOAD DATA, BASED ON TREATED WATER. SITE SPECIFIC COOLING SYSTEM SIZING EQUATIONS (WITH TOLERANCES) 22TOTAL JACKET CIRCUIT (JW+OC) = (JW x 1.1) + (OC x 1.2). 23 TOTAL AFTERCOOLER CIRCUIT (AC) = AC x ACHRF x 1.05. DM5444-02 PAGE 3 OF 3 03-Mar-09 ATTACHMENT B Site:OXY Pond 10 Generator Building dBA1 =81.8dB (A)(Noise Attenuation Rating of Generator Building) D2 = 570ft.(COGCC Compliance Distance - property boundary) D1 = 49.2ft.(Distance of Noise Attenuation Rating of Enclosure) dBA2 = 60.5dB (A)(Calculated dB (A) at 570 ft.) dBA1 =81.8dB (A)(Noise Attenuation Rating of Generator Building) D2 = 2,100ft.(Distance to nearest occupied structure) D1 = 49.2ft.(Distance of Noise Attenuation Rating of Enclosure) dBA2 = 49.2dB (A)(Calculated dB (A) at 2,100 ft.) Table 1 Distance Extrapolation Worksheet Extrapolation to 570 ft. COGCC Rule 802(c) 1 - dB(A)Distance 2 = dB(A)Distance 1 - 20 x log10(Distance2/Distance1) Extrapolation to 2,100 ft.