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, <br /> Quarterly Report - Fourth Quarter 2003 <br /> • CHEROKEE TRUCK STOP <br />' 3535 East Cherokee Road, Stockton, California <br />' 1.0. INTRODUCTION <br /> At the request of Mr Ellis Cecchini of Cecchmi, Cecchim and Giovannom, Advanced <br />' GeoEnvironrnental, Inc (AGE) has prepared this report for field work performed at 3535 East <br /> Cherokee Road,Stockton,California,during the fourth quarter of 2003 The scope of work included <br /> conducting a quarterly ground water monitoring event and preparation of this report <br /> The site setting is illustrated in Figure 1 Structures, monitoring wells and soil boring locations are <br /> illustrated in Figure 2 Background information was summarized in the AGE-prepared Problem <br />' Assessment Report, dated 16 August 2001 <br />' At the request of the San Joaquin County Environmental Health Department(EHD),Cherokee Truck <br /> Stop quarterly ground water monitoring events are coordinated to occur concurrently with ground <br /> water monitoring activities at the adjacent Moore Truck Lines property (3400 Newton Road) <br /> • 2.0. PROCEDURES <br />' On 12 December 2003, six ground water monitoring wells and the large on-site domestic well were <br /> purged and sampled Field work was performed in accordance with the Central Valley Regional <br />' Water Quality Control Board (CVRWQCB) and EHD guidelines for the investigations of <br /> underground storage tank (UST) sites and sampling ground water monitoring wells, respectively <br />' 2 1 WELL MONITORING AND EVACUATION <br />' On 12 December 2003, a Solinst water level meter was used to measure the depth to ground water <br /> relative to the tops of the well casings in six monitoring wells in the area of the former UST <br /> locations The ground water elevation in wells MW-2 through MW-6 and ground water flow <br />' direction for the site were determmed from the data collected (Table 1) <br /> After measuring ground water depths, monitoring wells UST-2 through UST-7 were purged using <br />' a Waterra inertial pump Between 4 and 13 gallons of water were removed from wells UST-2 <br /> through UST-7(a minimum of three casing-water volumes per well) Groundwater was purged from <br />' near the top of the water column to remove water trapped within the unscreened interval of the well <br /> casings Temperature,pH and conductivity of purged water were measured at regular intervals during <br /> purging using an Oakton water analyzer The recorded field data and logs are included in <br />' <br /> AppendixA. Purged water was stored on-site in 55-gallon DOT-approved drums pending laboratory <br /> analysis <br /> Advanced GeoEnvirenmentaf,Inc <br /> 1 <br />