## Technical Memorandum

innov ative environmental solutions, inc. To: Jaime Pagan/EPA , Melanie King/EPA Date: April 30, 2009 From: Tom McGrath c: Jim McCarthy, Jeff Panek Subject: Data used to develop the MACT Floor for gas - fired IC Engines The tables below include emissions data for gas - fired internal combustion engines extracted from the file “Emission Factors from RICE EDB - All HP - All Loads.xls . ” The Excel file was provided by EPA on 4/29/09. The tabulated data are intended to replicate the MACT floors for formal dehyde and carbon monoxide (CO) presented in EPA Docket document EPA - HQ - OAR2008 - 0708 - 0006.pdf “Subcategorization and MACT Floor Determination for Stationary Reciprocating Internal Combustion Engines ≤500 HP at Major Sources.” As noted below, I was not able to exactly replicate the MACT Floor for 4SLB units; thus, it would be appreciated if you or your subcontractor Alpha- Gamma could review the 4SLB data and note discrepancies between the tabulated data below and their analys i s. In addition, verification of the MACT Floor data for 4SRB and 2SLB engines would be appreciated. 4 S RB Gas - Fired IC Engines MACT Floor Data Table 1 presents the formaldehyde emissions data used to develop the MACT floor for gas - fired SInon- emergency 4SRB engines 50 to 500 HP . The MACT floor for this engine subcategory is the level achieved b y 4S RB engines 50 to 500 HP operating without add- on (i.e. postcombustion) controls. Table 1 has data from 13 tests of engines between 50 and 500 hp. The propo sed MACT floor is based on the average of the best performing 12% of engines (or 2 tests). These data are shaded and result in a MACT floor of 2 ppbvd formaldehyd e at 15% O 2 

### . 2 S LB Gas - Fired ICEngines MACT Floor Data Table 2 presents the formaldehyde emissions data used to develop the MACT floor for gas - fired SInon- emergency

2SLB engines . The MACT floor for this engine subcategory is the level achieved b y 2 S LB engines 50 to 500 HP operating without add- on (i.e. post- combustion) controls. Data from 1 6 tests of engines between 50 and 500 hp are presented. EPA took the average of the best performing 12 percent (or 2 tests) of engines, found the corresponding CO tests and averaged those tests as well. These CO data are in Table 3 and the average of thes e two data is the proposed MACT floor o f 85 ppmvd of CO at 15 percent O 2 

### .

### 4 S LB Gas - Fired ICEngines MACT Floor Data

Table 4 presents the formaldehyde emissions data used to develop the MACT floor for gas - fired SInon- emergency

4SLB engines . The MACT fl oor for this engine subcategory is the level achieved b y 4 S LB engines 50 to 500 HP operating without add- on (i.e. post- combustion) controls. Data from 3 6 tests of engines greater than 500 hp are presented ( N ote – Docket document EPA -

HQ- OAR-2008- 0708- 0006 . pdf references 34 rather than 36 tests) . EPA took the average of the best performing 12 percent (or 4 tests) of engines, found the corresponding CO tests and averaged those tests. These CO data are in Table 5. Onl y two of the four best performing formaldehyd e engines had CO emissions data. The average of these two data is 8 2 ppmvd of CO at 15 percent O 2 . 

### ( Note – Docket document EPA - HQ- OAR-2008- 0708- 0006.pdf lists a MACT floor of 85 rather than 82 ppmv CO at 15% O2) .

### Table 1. MACT Floor Formaldehyde Emissions Data for Gas - Fired 4SRB Engines: 50 < hp < 500.

Test ID Engine Specifications Test Method O2 (%) ppb @ 15% O2 Manufacturer Model hp Load Run 1 Run 2 Run 3 Run 1 Run 2 Run 3 Avg 11.2 Ingersoll Rand 8SVG 440 100% CARB 430 5.0 5.0 5.0 1,247 1,896 1,900 1,681 7.4 Waukesha MM425 54 100% CARB 430 0.3 0.3 0.3 1,756 1,802 2,323 1,960 11.3 Ingersoll Rand 8SVG 440 100% CARB 430 16.7 16.7 16.7 8,596 5,352 5,543 6,497 7.1 NR MM605 60 100% CARB 430 3.3 3.3 3.3 5,793 14,733 1,797 7,441 7.5 NR MM336 77 100% CARB 430 6.0 6.0 6.0 11,060 3,679 8,359 7,699 7.12 Waukesha 1197 208 100% CARB 430 5.7 5.7 5.7 10,752 3,990 8,462 7,735 7.7 Waukesha 1197 208 100% CARB 430 2.7 2.7 2.7 7,894 7,401 8,069 7,788 7.3 Waukesha 1197 159 100% CARB 430 4.6 4.6 4.6 12,2 96 10,580 9,787 10,888 7.10 Waukesha 145 74 100% CARB 430 7.1 7.1 7.1 13,031 10,795 8,906 10,911 7.11 Waukesha 145 74 100% CARB 430 2.4 2.4 2.4 9,169 11,956 12,090 11,072 7.8 Waukesha 1197 208 100% CARB 430 6.0 6.0 6.0 12,845 17,696 18,694 16,412 7.6 NR MM335 77 100% CARB 430 7.0 7.0 7.0 16,872 17,471 17,225 17,189 7.2 NR MM605 60 100% CARB 430 4.5 4.5 4.5 38,375 35,569 18,125 30,690

### Table 2 . MACT Floor Formaldehyde Emissions Data for Gas - Fired 2 S L B Engines: 50 < hp < 500.

Test ID Engine Specifications Test Method O2 (%) ppb @ 15% O2 Manufacturer Model hp Load (%) Run 1 Run 2 Run 3 Run 1 Run 2 Run 3 Avg CSU - 1.4.1 Cooper Bessemer GMB -4VTF 440 95 FTIR 14.70 NR NR 15,333 NR NR 15,333 CSU - 1.14.1 Cooper Bessemer GMB -4VTF 440 100 FTIR 14.60 NR NR 15,776 NR NR 15,776 CSU - 1.6.1 Cooper Bessemer GMB -4VTF 440 100 FTIR 14.34 NR NR 16,091 NR NR 16,091 CSU - 1.1.1 Cooper Bessemer GMB -4VTF 440 100 FTIR 14.6 NR NR 16,693 NR NR 16,693 CSU - 1.9.1 Cooper Bessemer GMB -4VTF 440 100 FTIR 14.50 NR NR 16,725 NR NR 16,725 CSU - 1.5.1 Cooper Bessemer GMB -4VTF 440 100 FTIR 15.10 NR NR 17,173 NR NR 17,173 CSU - 1.10.1 Cooper Bessemer GMB -4VTF 440 100 FTIR 14.63 NR NR 17,369 NR NR 17,369 CSU - 1.16.1 Cooper Bessemer GMB -4VTF 440 100 FTIR 14.60 NR NR 18,002 NR NR 18,002 CSU - 1.11.1 Cooper Bessemer GMB -4VTF 440 95 FTIR 15.20 NR NR 18,002 NR NR 18,002 CSU - 1.13.1 Cooper Bessemer GMB -4VTF 440 100 FTIR 14.60 NR NR 18,166 NR NR 18,166 CSU - 1.15.1 Cooper Bessemer GMB -4VTF 440 100 FTIR 14.70 NR NR 18,274 NR NR 18,274 CSU - 1.12.1 Cooper Bessemer GMB -4VTF 440 95 FTIR 15.30 NR NR 18,365 NR NR 18,365 CSU - 1.8.1 Cooper Bessemer GMB -4VTF 440 95 FTIR 15.60 NR NR 19,021 NR NR 19,021 CSU - 1.3.1 Cooper Bessemer GMB -4VTF 440 69 FTIR 16.08 NR NR 22,443 NR NR 22,443 CSU - 1.2/7.1 Cooper Bessemer GMB -4VTF 440 68 FTIR 15.8 NR NR 24,112 NR NR 24,112 7.14 Clark MA -4 150 100 CARB 430 14.2 14.2 14.2 33,744 27,704 28,655 30,034



### Table 3 . MACT Floor C arbon Monoxide Emissions Data for Gas - Fired 2 S L B Engines: 50 < hp < 500. Test ID Engine Specifications Test Method O2 (%) ppmv @ 15% O2 Manufacturer Model hp Load (%) Run 1 Run 2 Run 3 Run 1 Run 2 Run 3 Avg CSU - 1.4.1 Cooper Bessemer GMB -4VTF 440 95 FTIR 14.70 NR NR 7 5 NR NR 75 CSU - 1.14.1 Cooper Bessemer GMB -4VTF 440 100 FTIR 14.60 NR NR 95 NR NR 9 5

### Table 4 . MACT Floor Formaldehyde Emissions Data for Gas - Fired 24L B Engines: 50 < hp < 500.

Test ID Engine Specifications Test Method O2 (%) ppb @ 15% O2 Manufacturer Model hp Load Run 1 Run 2 Run 3 Run 1 Run 2 Run 3 Avg 29.33x Cooper Bessemer LSV - 16 4,200 98 FTIR 9.6 NR NR ND (326) NR NR ND (326) 3.12 Dresser-Rand KVS -412 2,000 90 CARB 430 9.9 9.9 9.9 2,575 2,575 2,575 2,575 29.41x Ingersoll Rand KVS -412 2,000 91 FTIR 8.3 NR NR 4,683 NR NR 4,683 25.2 Ingersoll Rand KVR 616 5,500 70 CARB 430 13.8 13.75 13.6 3,571 7,274 3,482 4,775 21 Waukesha 7042 - GL 1,000 100 CARB 430 9.28 9.30 9.30 12,313 6,709 8,479 9,167 3.7 Dresser-Rand KVS -412 2,000 100 CARB 430 12.1 12.1 12.1 10,057 10,057 10,057 10,057 29.38x Cooper Bessemer LSV - 16 4,200 99 FTIR 9. 3 NR NR 15,869 NR NR 15,869 29.34x Cooper Bessemer LSV - 16 4,200 101 FTIR 9.4 NR NR 15,956 NR NR 15,956 29.37x Cooper Bessemer LSV - 16 4,200 98 FTIR 9.5 NR NR 17,131 NR NR 17,131 29.35x Cooper Bessemer LSV - 16 4,200 87 FTIR 9.9 NR NR 18,934 NR NR 18,934 2 9.36x Cooper Bessemer LSV - 16 4,200 85 FTIR 11 NR NR 19,667 NR NR 19,667 29.44x Ingersoll Rand KVS -412 2,000 89 FTIR 11.3 NR NR 20,527 NR NR 20,527 29.46x Ingersoll Rand KVS -412 2,000 92 FTIR 11.3 NR NR 25,444 NR NR 25,444 29.51x Ingersoll Rand KVS -412 2 ,000 87 FTIR 11.1 NR NR 26,670 NR NR 26,670 29.49x Ingersoll Rand KVS -412 2,000 88 FTIR 11.4 NR NR 26,767 NR NR 26,767 29.50x Ingersoll Rand KVS -412 2,000 88 FTIR 11.2 NR NR 27,736 NR NR 27,736 29.45x Ingersoll Rand KVS -412 2,000 82 FTIR 11.4 NR NR 28,4 44 NR NR 28,444 29.48x Ingersoll Rand KVS -412 2,000 84 FTIR 11.6 NR NR 30,578 NR NR 30,578 29.52x Ingersoll Rand KVS -412 2,000 80 FTIR 11.3 NR NR 30,852 NR NR 30,852 29.47x Ingersoll Rand KVS -412 2,000 85 FTIR 11.5 NR NR 31,006 NR NR 31,006 CSU -2.4.1 W aukesha 3521 GL 736 100 FTIR 9.80 NR NR 33,371 NR NR 33,371 CSU -2.9.1 Waukesha 3521 GL 736 100 FTIR 9.69 NR NR 33,806 NR NR 33,806 CSU -2.6.1 Waukesha 3521 GL 736 100 FTIR 9.10 NR NR 33,833 NR NR 33,833 CSU -2.14.1 Waukesha 3521 GL 736 100 FTIR 9.81 NR NR 33,939 NR NR 33,939 CSU -2.11.1 Waukesha 3521 GL 736 100 FTIR 9.81 NR NR 33,955 NR NR 33,955 CSU -2.1.1 Waukesha 3521 GL 736 100 FTIR 9.80 NR NR 34,128 NR NR 34,128 CSU -2.10.1 Waukesha 3521 GL 736 100 FTIR 9.80 NR NR 34,383 NR NR 34,383CSU -2.16.1 Wauke sha 3521 GL 736 100 FTIR 9.82 NR NR 34,840 NR NR 34,840

CSU -2.3.1 Waukesha 3521 GL 736 70 FTIR 9.81 NR NR 34,960 NR NR 34,960 CSU -2.12.1 Waukesha 3521 GL 736 100 FTIR 9.90 NR NR 34,987 NR NR 34,987 CSU -2.15.1 Waukesha 3521 GL 736 100 FTIR 9.90 NR NR 35, 102 NR NR 35,102 CSU -2.2.1 Waukesha 3521 GL 736 70 FTIR 9.82 NR NR 36,637 NR NR 36,637 CSU -2.13.1 Waukesha 3521 GL 736 100 FTIR 10.44 NR NR 36,742 NR NR 36,742 CSU -2.8.1 Waukesha 3521 GL 736 100 FTIR 10.50 NR NR 37,203 NR NR 37,203 CSU -2.7.1 Waukesha 3 521 GL 736 70 FTIR 9.20 NR NR 37,907 NR NR 37,907 CSU -2.5.1 Waukesha 3521 GL 736 100 FTIR 10.51 NR NR 42,046 NR NR 42,046



### Table 5 . MACT Floor Carbon Monoxide Emissions Data for Gas - Fired 4 S L B Engines: 50 < hp < 500. Test ID Engine Specifications Tes t Method O2 (%) ppb @ 15% O2 Manufacturer Model hp Load Run 1 Run 2 Run 3 Run 1 Run 2 Run 3 Avg 29.33x Cooper Bessemer LSV - 16 4,200 98 FTIR 9.6 NR NR 106 NR NR 106 3.12 Dresser-Rand KVS -412 2,000 90 CARB 430 9.9 9.9 9.9 No Data 29.41x Ingersoll Ra nd KVS -412 2,000 91 FTIR 8.3 NR NR 59 NR NR 59 25.2 Ingersoll Rand KVR 616 5,500 70 CARB 430 13.8 13.75 13.6 No Data