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Quarterly Report - First Quarter 2005 CHEROKEE TRUCK STOP 3535 East Cherokee Road, Stockton, California ' 1.0. INTRODUCTION At the request of Mr , Ellis Cecchini of Cecchmi, Cecchlnl, and Giovannom, Advanced GeoEnvironmental, Inc (AGE) has prepared this report of environmental activities performed at ` 3535 East Cherokee Road, Stockton, California during the first quarter of 2005 The scope of work Included conducting a quarterly ground water monitoring event and preparation of this report The site setting is Illustrated on Figure 1 Structures, monitoring wells, and soil boring locations are Illustrated on Figure 2 Background information was summarized in the AGE-prepared Problem Assessment Report, dated 16 August 2001 At the request of the San Joaquin County Environmental Health Department EHD)>Cherokee Truck Stop quarterly ground water monitoring events are coordinated to occur concurrently with ground water monitoring activities at the adjacent Moore Truck Lines property (3400 Newton Road) 2.0. PROCEDURES, . On 16 March 2005, six ground water monitoring wells and the "large"on-site domestic well were monitored Field work was performed in accordance with the Central Valley Regional Water Quality Control Board(CVRWQCB)and EHD guidelines for the investigations of underground storage tank (UST) sites and sampling ground water monitoring wells, respectively 2 1 WELL MONITORING AND EVACUATION On 16 March 2005, a Solinst water level meter was used to measure the depth to ground water relative to the tops of the well casings in six monitoring wells in the area of the former UST locations The ground water elevation in wells UST-2 through UST-6 and ground water now direction for the site were determined from the data collected (Table 1) After measuring ground water depths, monitoring wells UST-2 through UST-7 were purged using a Waterra inertial pump and dedicated tubing Between 4 5 and 12 5 gallons of water (a minimum of hree casing-water volumes per well) were removed from wells UST-2 through UST-7 Ground water was purged from near the top of the water column to remove water trapped within the un- screened interval of the well casings Temperature, pH, and conductivity of the purged water were measured at regular intervals during purging using an Oakton water analyzer The recorded field data and logs are included in Appendix A Purged water was stored on-site in 55-gallon Department of ITransportation (DOT)-approved drums pending proper disposal In addition, the large on-site,domestic well was purged and sampled To purge the large domestic r iAdvaneed GeoEnhronmental,Inc