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lie 19 February 1997 <br /> AGE-NC Project No 95-0104 <br />' Page 4 of 6 <br /> 2 2 2 MONITORING WELL PURGING <br /> After water levels were measured, approximately five to eighty-gallons of ground water (minimum <br />' of three well volumes)were removed from wells VW-1, MW-1, MW-2, MW-5 and MW-6 utilizing <br /> a Grundfos Redi-Flo II submersible pump Temperature, pH and conductivity were measured at <br /> regular intervals from each well using an ICM model 52200 water analyzer to monitor stabilization <br />' of these characteristics Stabilization data and field logs are included with Appendix C Purged ground <br /> water was containerized in 55-gallon drums and stored on-site in an area inaccessible to the general <br /> public <br /> 2 2 3 GROUND WATER SAMPLE COLLECT ION <br />' Prior to collecting ground water samples, each sampling point was allowed to recharge for a <br /> minimum of one hour Water samples were collected utilizing disposable polyethylene balers and new <br />' nylon rope Sufficient ground water sample was collected from each well to fill three 40-m1 EPA vials <br /> containing hydrochloric acid as a preservative Care was taken to ensure that visible air bubbles were <br /> not present in the VOAs after filling and capping Ground water sample containers were labeled with <br /> the well designation, date, time, and sampler's initials <br /> Following sample collection, each sample was logged on a chain-of-custody form, placed in a chilled <br /> container and transported to a California state-certified laboratory for analysis of TPH-g BTE&X <br /> and MTBE in accordance with proper EPA methods <br /> 3.0. FINDINGS <br /> 3 1 ANALYTICAL RESULTS OF SOIL SAMPLES <br /> A total of ten soil samples were submitted to Alpha Analytical Laboratories Inc (AAL), a California <br /> State-certified laboratory for analysis TPH-g, BTEX and MTBE were not detected in soil samples <br /> collected at MW-5 or MW-6 Analytical results for soil samples are included in Table 2-Analytical <br /> Results of Soil Samples The laboratory report (AAL Laboratory Batch Nos 96-1203-014 and 96- <br /> 1216-014) and chain-of-custody are included in Appendix C <br /> Furthermore, two selected soil samples were collected from MW-6 at depths of 25 and 35 feet and <br /> analyzed by AAL for total organic carbon (TOC) TOC was detected in the 25-foot sample at a <br /> concentration of 444 mg/kg (milligrams per kilogram or pars per million ppm) and detected in the <br /> 35-sample at a concentration of 455 ppm The laboratory report (AAL Laboratory Batch Nos 96- <br /> 1230-012) and chain-of-custody are included in Appendix D <br />