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t <br /> x � <br /> r <br /> MONITQRING WELL INSTALLATION-WORD PLAN ' <br /> s <br /> March 1998 <br /> West Clay Properties <br /> Y 639 West Clay Street, Stockton, California _ <br /> 14. INTRODUCTION'AND SCOPE OF WORK <br /> West Cl <br /> In accordance with the request of Ms Tina Mayhew of 1 t on Work Plan for 639 <br /> ell jn� <br /> GeoEnvironmental, Inc (AGE)1fornpiaeThe location of the sitpared this Monitoringe is illustrated on Figur6 1- Location <br /> West Clay Street, Stockton, Cal a' <br /> Map,Stiuctures, well and boring locations are illustrated on Figure 2 -Site Plan <br /> This work plan is prepared in accordance with guidelines established by the San Joaquin County <br /> Public Health Services-Environmental Health Division (PHS-EIand Central Valley Regional T <br /> Water Quality Control Board(CVRWQCB)for the investigation of underground storage tank(UST) <br /> sites <br /> 2,0. BACKGROUND <br /> California AGE has been, <br /> The site is located in a flat, commercial oved from the ea of western ate inkMay 1990 The product line from <br /> informed that one 1,000-gallon UST was rem q approximately 550 , <br /> the former UST to the dispenser was removed eO tuber 199oved om b farmeryUST area Soil was 4 <br /> cubic yards of hydrocarbon-impacted soil <br /> ' ever, the lateral and vertical'extent of contamination was not <br /> excavated to depths of 38 feet, how <br /> assessed . . <br /> In March 1994, three monitoring wells and one additional soil boring were drilled andT installed <br /> red by <br /> ' the-site- Ground water was determined to be impacted and additions <br /> the lateral and vertical extent of impacted soil and ground water <br /> the PHS-EHD to completely define f ` <br /> advanced at thesite Eight soil and two <br /> In No <br /> vember 1996, four Geoprobe soil probe borings were , , <br /> grab'water samples were analyzed fron'the probe borings Low concentrations of xylenes and tots <br /> re detected the <br /> ay 1997,petroleum hydrocarbons quantified as diesel we 'd e ins grab he easteni and westvater samples Inern lateral- <br /> Tw6 additional inomt6nrig wells were installed at the site, dg <br /> extent of impacted ground water Site background and assessment7ac1epared by AGE es were manned in <br /> Quarterly Monitoring Report and Data Summary- Decembe P` p <br /> x , <br /> L <br /> 3.0. ` SCOPE OF WORK <br /> 3 1 DRILLING AND SAMPLING <br /> The scope of work will include the advancement of Iwo, l borings to a total depth of <br /> soil <br /> P <br /> Advanced GeoCn% Inc. <br />