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1 I First Quarter 1996 Groundwater Monitoring& Remediation Status Report ' Moore Petroleum, 14800 W Frontage Rd,Manteca,CA April 24, 1996 Page 3 ' Vapor Extraction Remediation System Status In early 1995, Emcon installed a soil vapor extraction system consisting of a Remediation Service, Int'1 Spray Aeration Vapor Extraction (S A V E) system at the subject site The vapor extraction system was installed per San Joaquin Valley Unified Air Pollution Control District (SJVUAPCD) permit conditions The vapor extraction system consists of an internal combustion engine with catalytic converters mounted on the exhaust pipe During this reporting penod, soil vapor flow to the system has ranged from 35 standard cubic feet per minute (scfm) on February 22, 1996, to 47 ' scfm on January 23, 1996 Vapor samples were collected from the system influent and effluent on January 23, February 8, and ' on March 6, 1996 to demonstrate compliance with SJVUAPCD permit ' On January 23, 1996, the vapor extraction rate was 47 standard cubic feet per minute (SCFM) Based on the vapor sample analytical results for this date, the system extraction rate was 3 3 pounds per day (lb /day) of TPH, as gasoline, and 0 002 lb /day of benzene On February 8, 1996, the vapor extraction rate was 37 SCFM Based on the vapor sample analytical results for this date, the system extraction rate was below laboratory detection limits for both TPH, as gasoline and benzene On March 6, 1996, the vapor extraction rate was 43 SCFM Based on the vapor sample ' analytical results for this date the system extraction rate was 1 9 lb /day of TPH, as gasoline Benzene was not detected in the influent to the vapor extraction system on March 6, 1996 Air analytical results and chain-of-custody forms are contained in Attachment 3 As of March 6, 1996, ' the vapor extraction system has extracted approximately 2,300 lbs of TPH, as gasoline, and 7 6 lbs of benzene ' System operating data are contained in Table 3 Mass extraction rates to date, based on laboratory analytical results, are contained in Table 4 Example calculations are contained in Attachment 4 ' Groundwater Remediation tem On January 23, 1995, Emcon started a groundwater treatment system at the subject site The groundwater treatment system is pneumatically operated via compressed air supplied from the ' R S I unit and extracts groundwater from monitoring wells MW-1, MW-2, MW-3 and MW-4 Once the groundwater arrives in the remediation compound via I" diameter PVC piping, it is filtered through two in-line particulate filters and then through two in-line, 400 lb carbon vessels ' Upon discharging from the carbon vessels, it is reinjected through two reinjection wells, RWA and RW-2, located to the west of the remediation compound (Figure 2) ' During this reporting period, water flow through the treatment system has ranged from 1 0 gallon �1 M