ARCHIVED REPORTS XR0006055 - Laserfiche WebLink

Home Browse Search

1 r ''Fourth Quarter 1995 Quarterly Groundwater Monrtormg&Remediation Status Report Moore Petroleum,Inc, 1399 E Yosemte Ave,Manteca,CA November 15, 1995 Page 2 ' GROUNDWATER MONITORING ' Grou_ndwater Levels On October 19, 1995, Apex personnel collected groundwater-level measurements from all six ' wells All groundwater elevations were measured to the nearest 0 01 foot, referenced to the surveyed top-of-casing elevations, and conducted according to the Apex standard operating procedures(SOP)included as Attachment 1 Liquid-level measurements collected since January ' 1993 are summarized in Table 1 Figure 3 is a potenriometric surface map of the shallow water- bearing zone on October 19, 1995 Groundwater m lin n Analysis On October 19, 1995, Apex personnel collected groundwater samples from all six monitoring ' wells(MW-1B, MW-2 through MW-6) The samples were submitted, under chain-of-custody, to Sparger Technology, Inc , of Sacramento, California, a state-certified analytical laboratory All samples were collected according to the Apex SOP included in Attachment 1 Analytical results ' since January 1992 for total petroleum hydrocarbons(TPH), as gasoline, and benzene, toluene, ethylbenzene and total xylenes (BTEX) are summarized in Table 2 The laboratory analytical reports and chain-of-custody form are included in Attachment 2 All six groundwater samples were below laboratory detection hrmts for TPK as gasoline, and for BTEX ' REMEDIATION STATUS On December 6, 1994, a soil vapor extraction system consisting of an R S I SAVE system was ' installed at the subject site The vapor extraction system was installed per San Joaquin Valley Unified Air Pollution Control District Permit conditions The vapor extraction system consisted of an utternal combustion engme with catalytic converters mounted on the exhaust The system ' was started on December 6, 1994, and after adjustments, has operated continuously from December 13, 1994 through March 21, 1995 During this reporting period, soil vapor flow to the system vaned from 43 cubic feet per minute (CFM) on January 24, 1995, to 15 CFM on ' March 7, 1995 The nutial vapor extraction rate was 16 CFM Based on a vapor sample analytical results on ' February 24, 1995, the system extraction rate was 0 23 pounds per day(lb/day) as gasoline Benzene was not detected and petroleum constituent discharge rates were essentially zero System operating data calculations are contained in Table 1 of Attachment 3. 1