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1 SECOR www secorcom INTERNATIONAL 3017 Kilgore Road Suite 100 S E C O R INCORPORATED Rancho Cordova CA 95670 916-861-0400 TEL (�/f 918-861-0430 FAX July 25, 2003 Ms Jennifer McKinney San Joaquin Valley Unified Air Pollution Control District JUL $ z0�� Northern Regional Office 4230 Kiernan Avenue, Suite 130 ENVIRONMENT HEALTH Modesto, CA 95356-9322 PERMIT/SERVICES RE initial Compliance Report ARCO#4932 16 East Harding Way Stockton, CA SECOR Project No 77BP 54932 03 0336 Dear Ms McKinney On behalf of Atlantic Richfield Co , SECOR International Incorporated (SECOR) is performing environmental services at the site referenced above As required by the San Joaquin Valley Unified Air Pollution Control District (SJVUAPCD) Authority to Construct (ATC) number N-4826-1-0 (Attachment A), this report presents the results of laboratory analysis for the influent and effluent air samples collected at the initial inspection of the soil vapor extraction (SVE)system on May 28, 2003 r� In addition to the SVE system, a groundwater extraction (GWE) system also operates at the subject l site An air stripper is used to volatilize contaminants present in the extracted groundwater, and the vapor effluent from the air stripper is routed to the Thermtech thermal oxidizer, model VAC50, used as the abatement device for both the soil vapor and vapor effluent from the air stripper During the initial inspection, gas flow rate measurements and laboratory air samples were collected from the well field Influent and oxidizer effluent air streams At the time of the initial inspection the air stripper was not operational and, therefore, an air stripper vapor effluent sample was not collected The Inspection/investigation Summary prepared by the SJVUAPCD during system compliance start- up is included as Attachment B Additional air samples were collected on July 8, 2003, the date of permanent system start-up, and Included the well field influent, air stripper vapor effluent, and oxidizer effluent air streams The air samples were sent under chain-of-custody documentation to a California State-certified analytical lab (Sequoia Analytical) and analyzed for total petroleum hydrocarbons as gasoline (TPHg), benzene, toluene, ethylbenzene, and xylenes (BTEX compounds), and methyl tert-butyl ether(MtBE) SVE system performance data are presented in Table 1, air stripper vapor effluent data are presented In Table 2, and oxidizer emissions data are presented In Table 3 Field data sheets are presented as Attachment C, and certified laboratory analytical reports and chain-of-custody documentation are presented as Attachment D The analytical results from the sampling events indicate that the SVE system was in compliance with conditions of ATC number N-4826-1-0 l� 11ARC014932\Ajr Reports\SJVAPCD Intitial Compliance Report doc