Laserfiche WebLink
iZ <br /> en viros. <br /> v1�t <br /> 3 P 91? 59 <br /> June 30, 1997 <br /> Mr. Alex Perez <br /> Shell Oil Products Company <br /> P O Box 4023 <br /> Concord, California 94524 <br /> RE: Quarterly Monitoring Report - Second Quarter 1997 <br /> Shell Service Station <br /> 620 West Charter Way <br /> Stockton, California <br /> WIC #204-7524-4305 <br /> Dear Mr Perez <br /> This Quarterly Monitoring Report describes the recently completed activities <br /> associated with ground water monitoring and sampling at the referenced site <br /> (Plates 1 and 2) This report was prepared to meet quarterly reporting <br /> requirements issued by the Regional Water Quality Control Board, Central Valley <br /> Region and San Joaquin County Public Health Services, Environmental Health <br /> Division (PHS-EHD) and to respond to PHS-EHD correspondence dated <br /> April 10, 1997 <br /> A soil vapor extraction (SVE) system has been operational at this site since <br /> September 17, 1992 The following table summarizes remediation by SVE <br /> performed to date <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS <br /> REMOVED - VAPOR PHASE (POUNDS) <br /> 2nd QUARTER 1997 CUMULATIVE <br /> 0 17,628 <br /> Quarterly Monitoring & Sampling Summary <br /> Ground water monitoring and sampling for-the second quarter of 1997 are <br /> summarized below <br /> • Blaine Tech Services, Inc (Blaine) measured ground water levels and <br /> collected samples from nine on-site wells (Wells MW-1 through MW-9) and <br /> one off-site well (Well MW-10) on May 19, 1997 Samples were <br /> transported to Crosby Laboratories Inc (CLI) of Placentia, California for <br /> chemical analysis <br /> • Enviros, Inc (Enviros) evaluated water-level measurement data and <br /> prepared a ground water contour map (Plate 2) Ground water appears to <br /> flow from a localized ground water mound centered on Well MW-2 at an <br />. approximate hydraulic gradient of 0 02 <br /> Enviros, Inc 270 Perkins Street Sonoma cahfornia Tel 707/935 4850 <br /> P 0 Box 259 954 76 0259 Fax 707/935 6649 <br />