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OCT 13 '98 13:24 FROM:BOB JUDD 916-444-3314 T-113 P 07/13 F-344 San J o a uin Valley Toxics emissions data for the eight-county San Joaquin Valley Unified Air Pollution Control District (SJVUAPCD) were obtained in computer database form from the California Air Resources Board. The file included data from the 1996 Air Toxics Emission Inventory that is reported under the Air Toxics "Hot Spots" Program. The database covers all reported toxic emissions in the San Joaquin Valley and is sorted by toxic pollutant and by county. Table 2 shows reported 1996 emissions of each toxic contaminant. Emissions are shown for each of the eight counties in the SJVUAPCD as wail as total emissions for the entire air district. Table 2, in its portrayal of emission levels, shows that, for the entire air district, about 264 thousand pounds of toxics were emitted during 1996. This is less than 45 percent of the emissions of these contaminants estimated to have been released from the Tracy tire pile fire, mostly in about a week's time in August 1998, Figure 1 shows a bar graph comparison, nor each toxic contaminant, between SJVUAPCD emissions in 1996 and the tire pile fi,e. For most toxic contaminants, tire pile fire emissions were substantially greater that annual District emissions. Modesto Gnergy F2ci1i The Modesto Energy Facility (MELP), sited in a remote location in Stanisiaus County, generates electricity by the controlled combustion of approximately five million waste tires (with an average weight of 25 pounds per tire) per year, a quantity similar to the Tracy tire fire. Results of a toxic emissions source test conducted in 1990 at the MELP facility were reported in the appendix to the USEPA report (USEPA, 1997). Toxics measured included most of those listed on the previous tables in this report. Due to extensive pollution control equipment and its special-purpose combustion system, toxic emissions from the MELP power plant are extremely low. As a result of toxics source testing, Modesto Energy has been classified by the SJVUAPCO as a "low priority" facility under guidelines of the Air Toxics "Hot Spots" Program. As such, it has been found to pose minimal or no health risk to the surrounding community. 4