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' Second Quarter 1996 Groundwater Monitoring&Remediation Status Report Moore Petroleum, 14800 W Frontage Rd,Manteca,CA August 7, 1996 ' Page 3 Vapor Extraction.Remediation System Status, ' In early 1995, Emcon installed a soil vapor extraction system consisting of a Remediation Service, Int'l 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 period, soil vapor flow to ' the system has ranged from 27 standard cubic feet per minute(schn) on August 2, 1996, to 45 scfm on May 15, 1996 ' Vapor samples were collected from the system influent and effluent on April 5, May 3, June 13 and July 19, 1996 to demonstrate comphance with SJVUAPCD permit ' On April 5, 1996,the vapor extraction rate was 37 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 TPR as gasoline, and benzene was below laboratory detection limits On May 3, �k 1996, the vapor extraction rate was 41 SCFM Based on the vapor sample analytical results for this date, the system extraction rate was 0 36 pounds per day(lb/day) of TPIT, as gasoline, and 0 0077 pounds per day(lb /day) of benzene On June 13, 1996,the vapor extraction rate was 35 ' SUM Based on the vapor sample analytical results for this date the system extraction rate was 0 91 lb/day of TPIT, as gasoline Benzene was not detected in the influent to the vapor extraction system on this date On July 19, 1996,the vapor extraction rate was 39 SCFM Based on the vapor sample analytical results for this date the system extraction rate was 0 981b/day of TPA as gasoline Benzene was not detected in the influent to the vapor extraction system on this date Air analytical results and chain-of-custody forms are contained in Appendix B As of July 19, 1996, the ' vapor extraction system has extracted approximately 2,350 lbs ofTPK as gasoline, and 7 8 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 ' Groundi vater Remediation System 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 V diameter PVC piping, it is ' filtered through two in-hne particulate filters and then through two m-line, 400 lb carbon vessels • Upon discharging from the carbon vessels, it is reinfected through two remiection wells, RW-1 and RW-2, located to the west of the remediation compound(Figure 2) 1