YEAR SOURCE ID SOURCE NAMEFACILITY ID APCD DBA STREET_NUMBERSTREET_NAME STATE_NAME CITY ZIP POLLUTANT LBS/YR TPY

2004 7263 OTAY LANDFILL 88176A OTAY LANDFILL INC 1700 MAXWELL RD CA CHULA VISTA 91910 NOx 41,312 ÓðÚÈ2004 7263 OTAY LANDFILL 88176A OTAY LANDFILL INC 1700 MAXWELL RD CA CHULA VISTA 91910 PM10 374,918 ÔËÈÚÎ2004 8719 SYCAMORE 6257C SYCAMORE LANDFILL INC 8514 MAST BL CA SAN DIEGO 92145 NOx 18,992 ÁÚÎ2004 8719 SYCAMORE 6257C SYCAMORE LANDFILL INC 8514 MAST BL CA SAN DIEGO 92145 PM10 836,961 ÏÔËÚÎ2005 45 HANSON 255A HANSON AGGREGATES PACIFIC 7TH & MAIN STS CA CHULA VISTA 91911 PM10 33,668 ÔÍÚË2005 282 HANSON 282A HANSON AGGREGATES PACIFIC 550 TULIP N CA ESCONDIDO 92025 PM10 18,152 ÁÚÔ2006 128 SUPERIOR 128A SUPERIOR READY MIX CONCRETE 1508 MISSION RD W CA ESCONDIDO 92029 PM10 20,077 ÔðÚð2006 5161 HAMILTON 5161A HAMILTON SUNDSTRAND POWER 4400 RUFFIN RD CA SAN DIEGO 92123 NOx 25,156 ÔÓÚÍ2006 5867 HANSON 2558A HANSON AGGREGATES PACIFIC 5330 OTAY VALLEY RD CA CHULA VISTA 91911 PM10 94,221 ÏÈÚÔ2006 7050 MANSON 87161A MANSON CONSTRUCTION & PORTABLE CA SAN DIEGO 92000 NOx 27,653 ÔÌÚË2007 77 HANSON 180A HANSON AGGREGATES PACIFIC 9229 HARRIS PLANT RD CA SAN DIEGO 92145 PM10 20,723 ÔðÚÏ2007 94 USN NORTH 4821A USN AIR STATION NORIS NAS NORTH ISLAND CA SAN DIEGO 92135 NOx 18,200 ÁÚÔ2007 94 USN NORTH 98395A USN SUPSHIPS 3600 SURFACE NAVY BL CA SAN DIEGO 92136 NOx 16,150 ËÚÔ2007 138 HANSON 138A HANSON AGGREGATES PACIFIC 9255 CAMINO SANTA FE CA SAN DIEGO 92121 PM10 31,078 ÔÎÚÎ2007 221 USMC BASE / 98193A USMC BASE MILITARY SCHOOLS CAMP PENDLETON CA CAMP 92055 NOx 12,361 ÍÚÓ2007 221 USMC BASE / 98263A USMC BASE UNPERMITTED CAMP PENDLETON CA CAMP 92055 NOx 23,213 ÔÔÚÍ2007 7270 HANSON 88183A HANSON AGGREGATES PACIFIC 720 TWIN OAKS VALLEY RD CA SAN MARCOS 92069 PM10 43,346 ÓÔÚÈ2007 9165 HANSON 9165A HANSON AGGREGATES PACIFIC 8514 MAST BL CA SANTEE 92071 PM10 58,810 ÓÁÚÏ2007 10705 CA 10705A CALIFORNIA COMMERCIAL 9229 HARRIS PLANT RD CA SAN DIEGO 92145 PM10 24,809 ÔÓÚÏ2007 94343 AGRI SERVICE 94343A AGRI SERVICE 3210 OCEANSIDE BL CA OCEANSIDE 92057 PM10 10,933 ÎÚÎ2007 96429 J CLOUD INC 96429A J CLOUD INC 2094 WILLOW GLEN DR CA EL CAJON 92019 PM10 12,836 ÍÚÏ2008 5985 ENCINA WASTE 5985A ENCINA WASTEWATER AUTHORITY 6200 AVENIDA ENCINAS CA CARLSBAD 92009 NOx 13,893 ÍÚÁ2008 19 NATIONAL 253A NATL STEEL & SHIPBUILDING A 2798 HARBOR DRIVE CA SAN DIEGO 92113 NOx 25,833 ÔÓÚÁ2008 19 NATIONAL 253A NATL STEEL & SHIPBUILDING A 2798 HARBOR DRIVE CA SAN DIEGO 92113 PM10 46,319 ÓÌÚÓ2008 68 HANSON 396A HANSON AGGREGATES PACIFIC 12533 HY 67 CA LAKESIDE 92040 PM10 37,129 ÔËÚÍ2008 251 PACIFIC GAS 1034A PACIFIC GAS TURBINE CENTER INC 7007 CONSOLIDATED WY CA SAN DIEGO 92121 NOx 25,794 ÔÓÚÁ2008 556 HANSON 556A HANSON AGGREGATES PACIFIC 2266 WILLOW GLEN DR CA EL CAJON 92019 PM10 10,036 ÎÚð2008 1969 SOUTHERN 1969A SOUTHERN CALIFORNIA EDISON HY 101 NUCLEAR GEN CA SAN ONOFRE 92672 NOx 54,449 ÓÈÚÓ2008 2631 KYOCERA 2631B KYOCERA AMERICA INC 8611 BALBOA AV CA SAN DIEGO 92123 NOx 33,865 ÔÍÚÁ2008 4346 CW MC GRATH 4346A CW MCGRATH INC 1720 JAMACHA RD CA EL CAJON 92019 PM10 11,765 ÎÚÁ2008 4845 USN 32ND ST 98395A USN SUPSHIPS 3600 SURFACE NAVY BL CA SAN DIEGO 92136 NOx 12,858 ÍÚÏ2008 5924 GAS RECOVERY - 5924B GAS RECOVERY SYSTEM INC 1615 SAN ELIJO RD CA SAN MARCOS 92069 NOx 32,232 ÔÍÚÔ2008 6257 GAS RECOVERY - 6257A GAS RECOVERY SYSTEMS INC 8514 MAST BL CA SANTEE 92071 NOx 40,798 ÓðÚÏ2008 7630 LARKSPUR 7630A LARKSPUR ENERGY FACILITY 9355 OTAY MESA RD CA SAN DIEGO 92154 PM10 14,089 ÈÚð2009 73 CABRILLO 333A CABRILLO POWER I LLC ENCINA 4600 CARLSBAD BL CA CARLSBAD 92008 NOx 109,233 ÎÏÚÍ2009 73 CABRILLO 333A CABRILLO POWER I LLC ENCINA 4600 CARLSBAD BL CA CARLSBAD 92008 PM10 95,187 ÏÈÚÍ2009 171 GROSSMONT 171A GROSSMONT DISTRICT HOSPITAL 5555 GROSSMONT CENTER CA LA MESA 91942 NOx 78,277 ÌÁÚÔ2009 351 S. D. STATE 351A SD STATE UNIVERSITY 5500 CAMPANILE DR CA SAN DIEGO 92182 NOx 50,891 ÓÎÚÏ2009 1795 SOLAR 1869A SOLAR TURBINES INC 4200 RUFFIN RD CA SAN DIEGO 92123 NOx 188,865 ÁÏÚÏ2009 1795 SOLAR 1869A SOLAR TURBINES INC 4200 RUFFIN RD CA SAN DIEGO 92123 PM10 15,025 ÈÚÎ

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YEAR SOURCE ID SOURCE NAMEFACILITY ID APCD DBA STREET_NUMBERSTREET_NAME STATE_NAME CITY ZIP POLLUTANT LBS/YR TPY

2009 3680 S. D. CITY PT. 3680A SD CITY OF PT LOMA 1902 GATCHELL RD CA SAN DIEGO 92106 NOx 90,358 ÏÎÚÓ2009 3680 S. D. CITY PT. 3680A SD CITY OF PT LOMA 1902 GATCHELL RD CA SAN DIEGO 92106 PM10 22,428 ÔÔÚÓ2009 5640 QUALCOMM, 5640A QUALCOMM INC 5555 MOREHOUSE DR CA SAN DIEGO 92121 NOx 53,009 ÓÍÚÎ2009 96224 MINNESOTA 96224A MINNESOTA METHANE SAN DIEGO 4949 EASTGATE MALL CA SAN DIEGO 92121 NOx 50,618 ÓÎÚÌ2009 96224 MINNESOTA 96224A MINNESOTA METHANE SAN DIEGO 4949 EASTGATE MALL CA SAN DIEGO 92121 PM10 17,077 ËÚÎ2009 96387 MINNESOTA 96387A MINNESOTA METHANE SAN DIEGO 5244 CONVOY ST CA SAN DIEGO 92111 NOx 84,497 ÏÓÚÓ2009 96387 MINNESOTA 96387A MINNESOTA METHANE SAN DIEGO 5244 CONVOY ST CA SAN DIEGO 92111 PM10 29,748 ÔÏÚÁ2009 27 CANYON ROCK - 103A CANYON ROCK 7500 MISSION GORGE RD CA SAN DIEGO 92120 PM10 71,732 ÌÎÚÁ2009 56 VULCAN - 89125A VULCAN MATERIALS CO WESTERN 5745 MISSION CENTER RD CA SAN DIEGO 92108 PM10 88,606 ÏÏÚÌ2009 72 DYNEGY SOUTH 334A DYNEGY SOUTH BAY LLC 990 BAY BL CA CHULA VISTA 91911 NOx 71,493 ÌÎÚÈ2009 72 DYNEGY SOUTH 334A DYNEGY SOUTH BAY LLC 990 BAY BL CA CHULA VISTA 91911 PM10 73,515 ÌÍÚË2009 118 CP KELCO 203A CP KELCO US INC 2025 HARBOR DR E CA SAN DIEGO 92113 NOx 77,600 ÌËÚË2009 118 CP KELCO 203A CP KELCO US INC 2025 HARBOR DR E CA SAN DIEGO 92113 PM10 12,750 ÍÚÏ2009 149 APPLIED 15A APPLIED ENERGY LLC MCRD MCRD BLD 566 END OF CA SAN DIEGO 92133 NOx 80,755 ÏðÚÏ2009 149 APPLIED 15A APPLIED ENERGY LLC MCRD MCRD BLD 566 END OF CA SAN DIEGO 92133 PM10 25,650 ÔÓÚË2009 167 SOLAR 368A SOLAR TURBINES INC 2200 PACIFIC HY CA SAN DIEGO 92101 NOx 33,159 ÔÍÚÍ2009 290 RCP BLOCK & 290A RCP BLOCK & BRICK INC 9631 MAGNOLIA AV N CA SANTEE 92071 PM10 11,663 ÎÚË2009 415 APPLIED 415A APPLIED ENERGY LLC NAVAL 3970 SURFACE NAVY BL CA SAN DIEGO 92136 NOx 112,419 ÎÍÚÓ2009 415 APPLIED 415A APPLIED ENERGY LLC NAVAL 3970 SURFACE NAVY BL CA SAN DIEGO 92136 PM10 44,506 ÓÓÚÌ2009 478 BAE SYSTEMS 344A BAE SYSTEMS SAN DIEGO SHIP FOOT OF SAMPSON ST CA SAN DIEGO 92113 NOx 14,607 ÈÚÌ2009 517 UCSD CAMPUS 402A UCSD 9500 GILMAN DR DEPT 0089 CA SAN DIEGO 92093 NOx 18,738 ÁÚÏ2009 517 UCSD CAMPUS 402A UCSD 9500 GILMAN DR DEPT 0089 CA SAN DIEGO 92093 PM10 19,504 ÁÚË2009 1976 UNION- 1976A SAN DIEGO UNION TRIBUNE LLC 350 CAMINO DE LA REINA CA SAN DIEGO 92108 NOx 15,977 ËÚð2009 4824 USMC AIR 4824A USMC MCAS MIRAMAR USMC MIRAMAR CA SAN DIEGO 92145 NOx 175,379 ËÈÚÈ2009 4824 USMC AIR 4824A USMC MCAS MIRAMAR USMC MIRAMAR CA SAN DIEGO 92145 PM10 10,561 ÎÚÌ2009 4824 USMC AIR 4824D USMC MCAS MIRAMAR 3RD MAW 45249 MIRAMAR WY BLDG CA SAN DIEGO 92145 NOx 42,424 ÓÔÚÓ2009 4835 USN HOSPITAL 4835A USN HOSPITAL 2 PWC NAVY HOSPITAL CA SAN DIEGO 92134 NOx 21,328 ÔðÚÈ2009 5270 APPLIED 54A APPLIED ENERGY LLC NORTH QUAY & ROGERS RD CA SAN DIEGO 92135 NOx 44,090 ÓÓÚð2009 5270 APPLIED 54A APPLIED ENERGY LLC NORTH QUAY & ROGERS RD CA SAN DIEGO 92135 PM10 30,948 ÔÎÚÎ2009 6068 PACIFIC 6068A PACIFIC RECOVERY CORP OTAY LANDFILL CA CHULA VISTA 91911 NOx 89,171 ÏÏÚÍ2009 6068 PACIFIC 6068A PACIFIC RECOVERY CORP OTAY LANDFILL CA CHULA VISTA 91911 PM10 31,056 ÔÎÚÎ2009 6306 VULCAN 6306A VULCAN MATERIALS WESTERN 10051 BLACK MOUNTAIN RD CA SAN DIEGO 92126 PM10 54,235 ÓÈÚÔ2009 8013 SDG&E 8013A SDG&E PALOMAR ENERGY CENTER 2300 HARVESON PL CA ESCONDIDO 92029 NOx 190,822 ÁÎÚÏ2009 8013 SDG&E 8013A SDG&E PALOMAR ENERGY CENTER 2300 HARVESON PL CA ESCONDIDO 92029 PM10 75,246 ÌÈÚÍ2009 8469 GOAL LINE LP - 92022A GOAL LINE LP 555 TULIP ST N CA ESCONDIDO 92025 NOx 37,856 ÔËÚÁ2009 8469 GOAL LINE LP - 92022A GOAL LINE LP 555 TULIP ST N CA ESCONDIDO 92025 PM10 51,956 ÓÍÚð2009 8717 S. D. COUNTY - 5924C SD CO OF PUB WKS SAN MARCOS SAN MARCOS LANDFILL CA SAN MARCOS 92069 NOx 19,143 ÁÚÍ2009 86072 S. D. CITY - 86072A SD CITY OF SO CHOLLAS LANDFILL 2781 CAMINITO CHOLLAS CA SAN DIEGO 92105 NOx 12,552 ÍÚÌ2009 88196 S. D. CITY - 88196C SD CITY OF MIRAMAR LANDFILL 5180 CONVOY ST CA SAN DIEGO 92111 PM10 164,444 ËÓÚÓ2009 89296 S. D. METRO 89296A SD METRO PUMPING STATION #2 4077 HARBOR DR N CA SAN DIEGO 92106 NOx 27,262 ÔÌÚÍ

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July 6, 2011 

Carol Bohnenkamp 

U.S. EPA, Region 9 

75 Hawthorne Street 

San Francisco, CA 94105 

Dear Ms. Bohnenkamp: 

In our conversations regarding modeling for the PSD permit application for the Pio Pico 

Energy Center (PPEC), you requested clarification of our proposal for characterizing the 

combined impact of the PPEC and existing sources. That clarification is provided below.

Nearby Sources 

Non-Project Sources Included in Cumulative Impact Modeling 

The basis for selecting non-project sources to include in the cumulative impact modeling 

was described in detail in PPEC’s April 1, 2011 PSD permit application. We used the 

results of preliminary (project only) modeling of project emissions, based on San Diego 

meteorology, to develop an emission-to-distance ratio to estimate the farthest extent at 

which a source might be expected to have impacts above the PSD Significant Impact 

Levels (SILs). We did not use this level as a “bright line” to eliminate non-project 

sources from consideration. Rather, we used this ratio to separate non-project sources into 

three groups: those that clearly could be excluded, those that clearly should be included, 

and those where additional judgment was required. We discussed the basis for including 

or excluding sources from the third group in the April 1 PSD application. 

After applying the procedure outlined above to the list of facilities provided by the 

District, PPEC proposed to include the following non-project sources in the cumulative 

impact modeling: 

NOx emissions from Larkspur Energy Facility (a small peaking plant located 

2.5 km west of the project site); 

NOx emissions from Pacific Recovery Corp (landfill gas waste-to-energy facility 

9.2 km west of the project site); and 

NOx and PM2.5 emissions from Otay Mesa Generating Company (a power plant 

located adjacent to the project site). 

sierra

research

1801 J Street 

Sacramento, CA 95811 

Tel: (916) 444-6666 

Fax: (916) 444-8373

Ann Arbor, MI 

Tel: (734) 761-6666 

Fax: (734) 761-6755 
Carol Bohnenkamp -2- July 6, 2011 

Non-Project Sources Not Included in Cumulative Impact Modeling 

During our discussions, you requested additional information regarding the following 

facilities that we had not proposed to include in the cumulative impact modeling analysis: 

Hanson Aggregates (Otay Valley Road) and Otay Landfill; Dynegy South Bay; Solar 

Turbines; and Manson Construction and Engineering. The requested information is 

provided below. 

Hanson Aggregates (Otay Valley Road) and Otay Landfill – You requested clarification 

of our estimation of PM2.5 emissions from these sources (based on the PM10 emissions 

provided by the District).

The District provided PM10 emission inventory data for all sources in the District with 

PM10 emissions greater than 5 TPY. The District did not provide PM2.5 emissions. 

Where PM emissions are from combustion, we assumed that all of the emissions were 

PM2.5. For Hanson Aggregates and Otay Landfill, however, the PM10 emissions are 

fugitive dust emissions—earth moving, material handling, and vehicle traffic on dirt 

roads. 

We estimated the PM2.5 emissions from the fugitive dust sources at these facilities using a 

PM2.5/PM10 fraction of 20% and the PM10 emissions provided by the District.1 This 

fraction was based on the CEC’s treatment of PM10 offsets from road paving projects 

(e.g., the CEC estimated that the PM2.5 fraction of fugitive dust reductions at the 

Altamont Landfill would be 15% of the PM10 reductions).2

For comparison, the following table shows AP-42 factors for various dust-generating 

activities similar to those found at landfills and aggregate plants; they range from 5:1 to 

15:1.

AP-42 Factors 

Vehicle traffic—dirt roads 

AP-42 Section Category PM10 factor PM2.5 factor Ratio 

11.19.2

Tertiary

Crushing

(controlled) 

0.00027 kg/Mg 0.00005 kg/Mg 0.19 

11.19.2 Screening

(controlled) 0.00037 kg/Mg 0.000025 kg/Mg 0.07 

11.19.2 Truck Loading 

(controlled) 5.0E-05 kg/Mg ND -- 

13.2.2 Vehicle Traffic 

(Unpaved Roads) k= 1.5 lb/VMT K =0.15 lb/VMT 0.10 

1

Please note that the ratio shown in the seventh column of Table 7-1 of the PSD application reflects the 

PM10 emission to distance ratio, and not the PM2.5 to distance ratio as indicated in the column header. 

The adjustment in this calculation for PM2.5 fraction was described on Page 23 of the PSD application. 

2

 CEC Staff, Final Staff Assessment, Tesla Power Project, April 2003. Air Quality Table 19, p. 4.1-40 
Carol Bohnenkamp -3- July 6, 2011 

The 20% fraction that we used to estimate PM2.5 emissions from reported fugitive PM10

emissions is therefore at the conservative end of the range of published emission factors.

Dynegy South Bay – You requested documentation confirming that the facility has been 

permanently closed. The requested documentation is provided in Attachment 1. 

Solar Turbines – You asked for a map showing the location of this facility. Please see 

Figure 7-2 of the PSD application. The Solar Turbines test facility (Site 45) is near the 

San Diego airport, near the vertical center on the far left of the figure. 

Manson Construction and Engineering – You requested documentation confirming that 

the reported emissions are for non-stationary sources, located throughout the District.

The table of stationary sources and their emissions that was provided by the District is 

presented in Attachment 2. Manson is the 10th facility on page 1, and the street name for 

the equipment is listed as “PORTABLE,” indicating that the emissions are associated 

with portable equipment. 

Source of Ambient Background Data 

You indicated that Region 9 was considering whether to recommend use of ambient 

monitoring data from the Otay Mesa Border Crossing to characterize regional 

background concentrations for this demonstration. There is no technical basis for 

considering the Otay Mesa monitoring data to be representative of regional pollution 

levels. The monitor is clearly impacted by the heavy traffic—comprised in significant 

part by Mexican vehicles not subject to California’s emission standards—that idles at the 

border waiting for permission to cross. This traffic is located within a few hundred feet 

of the monitoring station. Because of these impacts, the monitoring data cannot be 

considered to be representative of regional concentrations.

The Chula Vista monitoring site is only 9 km away from PPEC, with no intervening 

geological features that would affect the regional dispersion of pollutants. Data from this 

station represent regional background plus direct impacts from sources close to it. 

Monitored values from this site must be at least as high as the regional background (by 

definition, it is impossible for valid monitoring data to be below the regional 

background), and may be higher than the background by virtue of local impacts. We 

propose to use this station’s data to represent regional background data, and to explicitly 

superimpose the impacts of significant nearby non-project sources. We do not propose to 

adjust monitoring data to account for direct impacts from those, even though EPA 

guidance permits such an adjustment. 

Our proposed methodology will therefore compare the national ambient air quality 

standard to the sum of regional background, direct impacts to the monitoring site, 

modeled impacts from our project, and modeled impacts from nearby non-project 

sources. Since the difference between the Chula Vista data and the Otay Mesa data is the 

degree to which they are impacted by local sources, and not the regional background, use 
Carol Bohnenkamp -4- July 6, 2011 

of the more heavily impacted Otay Mesa data would not be consistent with EPA 

guidance.

Conclusion

Because the compliance demonstration is in the critical path for the PSD permit review, 

we request expeditious approval of our proposed modeling demonstration. 

Please do not hesitate to contact me if you have any questions. 

Sincerely,

Steve Hill 

cc: Steve Moore, SDAPCD 

Eric Solorio, CEC 

Dave Jenkins, Apex Power 

John McKinsey, Stoel Rives 
Attachment 1 

Dynegy South Bay
Attachment 2 

SDAQMD Emission Inventory 

Facilities with NOx or PM10 Emissins > 5 TPY