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_-#' <br /> 1 N F <br /> Quarterly Report -Third Quarter 2003 +� <br /> CHEROKEE TRUCK STOP <br /> 3535 East Cherokee Road, Stockton,,California <br />' 1.0. INTRODUCTION <br /> 1 ; <br /> '>, 1-v T' At the request of Mr' Ellis Cecchim of Cecchim, -Cecchini and Giovannom, Advanced ' <br />' GeoEnvironmental, Inc (AGE) has prepared this report for field work performed at 3535 East <br /> Cherokee Road, Stockton, California, during the third quarter of 2003 The scope of work included <br /> 7 conducting a quarterly ground water monitoring event and preparation of this report <br /> The site setting is illustrated in Figure 1 Structures, monitoring well and soil boring locations are <br /> illustrated in Figures 2 Background information was summarized in the AGE-prepared Problem <br />' Assessment Report, dated 16 August 2001 <br /> " 2 0. PROCEDURES ' <br /> On 25 September 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 /> 1 , <br /> 2 1 WELL MONITORING AND EVACUATION <br /> On 25 September 2003, a Solmst 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 determined 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 15 gallons of water were removed from wells UST-2 , <br />' through UST-4, UST-6 and UST-7 (a minimum of three casing-water volumes per well), three <br /> casing-water volumes couldnot be evacuated from well UST-5 Ground water'was purged from near <br /> 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 /> Appendix A Purged water was stored on-site in 55-gallon DOT-approved drums pendmg laboratory ' <br /> analysis ` <br /> 1 1 <br /> YI ,� <br /> 1 <br /> 1 Advanced GeoEnvironmental,Inc <br /> t 1 <br /> I Y <br /> I <br />