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1 <br /> Quarterly Report - Third Quarter 2001 <br />' LODI AIRPORT <br /> 23987 North Highway 99, Acampo, California <br /> i <br />' 1.0. INTRODUCTION <br /> I At the request of Mr Robert Kupka of Lodi Airport,Advanced GeoEnvironmental, Inc (AGE)has <br /> prepared this quarterly report for the property located at 23987 North Highway 99, Acampo, <br /> California(site) The scope of work included conducting a quarterly groundwater monitoring event <br />' and preparation of this report The location of the site and the immediately surrounding area are <br /> illustrated on Figure 1, structures, former UST locations, and soil boring and monitoring well <br /> locations are illustrated on Figure 2 Background information is summarized in Preliminary Site <br />' Assessment WorkPlan,dated 23 February2000,and in Underground Storage Tank-Removal Report, <br /> dated 11 January 2000, both prepared by AGE <br /> 2.0. PROCEDURES <br /> Field work was performed in accordance with guidelines established by the California Regional <br /> Water Quality Control Board-Central Valley Region for investigation of underground storage tank <br /> • (UST)sites Ground water monitoring procedures were performed as outlined in the AGE-prepared <br /> Preliminary Site Assessment Work Plan, and as approved by the PHS-EHD by letter dated <br /> 23 February 2000 <br /> 2 1 WELL MONITORING AND EVACUATION <br /> IOn 22 August 2001, a Solinst water level meter was used to measure the depth to ground water in <br /> all three monitoring wells relative to the tops of the well casings After the depth-to-ground water <br /> measurements were collected, casing water in the monitoring wells was evacuated using polyvinyl <br /> chloride (PVC) bailers Approximately 5 gallons of water were evacuated from each of the <br /> monitoring wells, equivalent to three casing-water volumes per well <br /> Temperature,pH and conductivity were measured at 1-gallon intervals,using a Hydac water analyzer <br /> to monitor pH, temperature and conductivity of the purged water, the field data logs are provided <br /> Iin Appendix A Purged water was temporarily stored on-site in 55-gallon drums <br /> I2 2 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES <br /> Water samples were collected from each monitoring well using new disposable bailers after allowing <br /> Ithe wells to achieve a minimum 80% recovery of the pre-purge water volume The samples were <br /> transferred into laboratory-supplied 40-m1 EPA-approved VOA vials containing 0 5 ml 18% <br /> hydrochloric acid as a sample preservative The sample vials were then labeled with the monitoring <br /> well designation,date,time of sampling and the sampler's initials The samples were transported in <br /> a chilled container under chain of custody to McCampbell Analytical, Inc (MAI), a California <br /> Advanced GeoEnvironmental,Inc <br />