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f I I -.{,<+x;auk I 11 I; Ix 1 it ' ' Quarterly Report - Third Quarter 2004 i' • CHEROKEE TRUCK STOP ` 3535 East Cherokee Road, Stockton, California 1 If 1 1 E 1.0. INTRODUCTION " At the request of Mr Ellis Cecchirii of Cecchini,, Cecchim, and Giovannom, Advanced GeoEnvironmental, Inc (AGE) has prepared this report of environmental activities performed at 3535 East Cherokee Road, Stockton California during the third quarter of 2004 The scope of work j included conducting a quarterly ground water monitoring event and preparation of this report The '1 site setting is illustrated on Figure I ' 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 ' 1 , ' ! I At the request of the San Joaquin County Environmental Health Department(EHD),Cherokee Truck- Stop ruck_Stop quarterly ground water monitoring events are coordinated to occur concurrently with ground r' ' water monitoring activities at the adjacent Moore Truck Lines property(3400 Newton Road) 2.0. PROCEDURES � . On 27 August 2004, six ground water monitoring wells and the"large"on-site domestic well were monitored and only five were purged and sampled, due to a seasonal low water table level Field work was performed in accordance with the Central Valley Regional Water Quality Control Board ' I (CVRWQCB) and EHD guidelines far the investigations of underground storage tank(UST) sites and sampling ground water momtoring wells, respectively 2 ,1 WELL MONITORING AND EVACUATION On 27 August 2004, a'Solinst water level meter was used to measure the depth to ground water i relative to the tops of`the well casings in six monitoring wells in the area of the foriner UST locations The ground water, elevation in wells UST-2 through UST-6 and-ground water flow r ' direction for theisite were determined from,the data collected (Table 1) After irieasunng ground water depths, monitoring wells UST-2 through UST-4 and UST-7 were r purged using a Waterra inertial pump and dedicated tubing Between 6 and 9 5 gallons of water were removed from the wells (a minimum of three casing-water volumes per well) Ground water was purged from near thelto 'ofthe water column to remove'water trapped within the unscreened 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 'There was not enough water in wells € UST-5 and UST-6 to purge or sample The recorded field data and logs are included in Appendix A , I Purged water was stored on-site in 55-gallon Department of Transportation(DOT)-approved drums ' • pending proper disposal i Advanced GeoEnviranmental,lnc I I 6