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I Quarterllie y Y Report December 1996 MARLOWE PROPERTY 4648 East Waterloo Road, Stockton, California I 1.0. INTRODUCTION AND SCOPE OF WORK IIn accordance with a request from Mr Jonathan Marlowe of Marlowe Properties, Advanced GeoEnvironmental, Inc (AGE) has prepared this Quarterly Report for 4648 East Waterloo Road in IStockton, California The location of the site is illustrated in Figure 1 -Map A plan of the site is illustrated in Figure 2 - Site Plan The scope of work was to monitor petroleum hydrocarbon concentrations in ground water at the site and included the installation of two additional monitoring wells This report is prepared in accordance with guidelines established by the San Joaquin County Public Health Services - Environmental Health Division(PHS-EHD) and the Central Valley Regional Water Quality Control Board (CVRWQCB) for investigation of underground storage tank (UST) sites Background information and a description of prior investigations at the site has been included in the Quarterly Report - April 1996, dated 12 June 1996 prepared by AGE li 2 0. PROCEDURES 21 MONITORING WELL INSTALLATION AND SAMPLING 2 1 1 DRILLING AND SAMPLING On 27 November 1996 and 06 December 1996, two soil borings (MW-5 and MW-6) were advanced at the site utilizing a CME-55 truck mounted drill rig equipped with 8-inch diameter hollow stem augers Soil bonngs MW-5 and MW-6 were advanced to depths of approximately 87-feet and 83-feet bsg, respectively, and completed as two-inch diameter ground water monitoring wells (see Section 3 4 ) Cuttings generated during drilling activities was stockpiled on plastic sheeting, while rinseate was placed in properly labeled D O T model 17H 55-gallon drums and stored on-site in an area inaccessible to the general public Locations of the ground water monitoring wells are depicted on Figure 2 Discrete soil samples were collected from each boring at five-foot intervals beginning at fifteen feet bsg utilizing a California split-spoon sampler and brass sleeves The sampler was driven by dropping a 140-pound weight from a height of 30 inches The number of blows required to drive each 6-inch length of the sampler (blow counts) was recorded on boring logs, and are included in Appendix A . Upon sample retrieval, the middle brass sleeve was removed from the sampler Both ends of the sleeve were covered with Teflon sheets, capped and sealed with tape Each sample was labeled with I