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Quarterly Report - First Quarter 2002 <br /> _ STRONG PROPERTY <br /> 5157 West Business Loop 205, Tracy,"California ' <br />' 1.0. INTRODUCTION . <br /> i <br /> At the request of Mr. Robert arid Mike Strong, Advanced_ GeoEnvironmelital, Inc. (AGE) has <br /> prepared this quarterly reportfor the property located at 5157 West Business Loop 205, Tracy, <br /> California. The scope of work included ground water monitoring and sampling of monitoring wells <br /> MW1 through,MW6 and the domestic well,advancement of two soil borings and collection of deep <br /> grab ground water samples, and preparation of this report. The site and the surrounding area are <br /> illustrated in Figure 1. Structures and monitoring well locations are illustrated on Figures 2 and 3.1 <br /> „Background information for'the site is summarized in the AGE-prepared document titled Additional <br /> Site Assessment Work Plan Addendum, dated 01 July 2000. Quarterly monitoring'data from July <br /> 1998 to the present is-summarized in Tables 1 and 2 of this report: <br /> 2.0. ' PROCEDURES <br /> All field work procedures and reporting requirements are in accordance with guidelines issued by <br /> • the Central Valley Regional Water -Quality' Control ' Board (CVRWQCB) for `subsurface <br /> investigations of underground storage tank(UST),sites and guidelines issued by San Joaquin County' <br /> Environmental Health Department (EHD) for sampling of ground water monitoring wells. - <br /> :. 2.1. SOIL BORINGS <br /> On 11 January 2002,so probe robe boring s B8 and B9 were advanced utilizing a van-mounted Geoprobe - <br /> • . <br /> 5400 equipped with 1.125-inch dianneter probe rods with an attached 2.15-inch diameter soil <br /> sampler, using"direct push" technology. The probe borings,were,advanced vertically to depths'of <br /> 60 feet bsg: <br /> 2.2. GRAB GROUND WATER SAMPLING AND ANALYSIS <br /> Grab ground water samples were collected from each probe boring using a Geoprobe hydropunch <br /> sampling assembly.-The probe rods were advanced to approximately 60 feet bsg. The hollow steel - <br /> rods were then pulled up, exposing a PVC screen in the saturated zone. Ground water was allowed <br /> to enter the casing, and samples were retrieved'using a modified PVC tubing bailer. Sufficient <br /> sample was collected from each boring to fill three 40-m1 EPA-approved volatile organic analysis <br /> (VOA)vials containing 0.5 ml 1.8%hydrochloric acid as a sample preservative and one I-liter amber <br /> bottle without the sample preservative. Ground water sample containers were labeled with probe <br /> ' Advanced GeoEnvir—total,Inc. y <br />