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�a <br /> fs' <br /> 06 December 2000 <br /> AGE-NC Project No. 95-0100 <br /> Page 2 of 6 <br /> `i <br /> The sample was labeled, placed in an ice chest and transported under chain-of-custody to <br /> McCampbell Analytical Inc. of Pacheco (MAI). The sample was analyzed for total petroleum <br /> hydrocarbons quantified as gasoline (TPH-g) and for volatile aromatic hydrocarbons - benzene, <br /> toluene,.ethyl benzene and xylenes (BTEX) in accordance with EPA method 8015-modified and <br /> EPA method 8020, respectively. <br /> 2.2. GAUGING OF DEPTH TO GROUND WATER AND PURGING OF WELLS <br /> On 07 August 2000, the depths to ground water in monitoring wells MW-1, MW-2, MW-3 and <br /> F MW-6 were measured relative to the top of the well casings using a Solinst water level meter. <br /> Subsequently, approximately six to eight gallons of water(a minimum of three water volumes) were <br /> removed from each ground water monitoring well using a submersible PVC pump. An ICM .Model <br /> 52200 water analyzer was utilized to monitor temperature, pH and conductivity of purged water at <br /> regular purge-volume intervals. Dissolved oxygen levels were measured with a YSI 55 dissolved <br /> oxygen meter. Purged ground water was containerized in 55-gallon drums and stored on-site. <br /> Stabilization data and field logs are included in Appendix A. <br /> ` 2.3. COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES <br /> Water samples were collected from the purged wells using new disposable plastic bailers. The <br /> collected samples were transferred nto.EPA-approved 40-m1 volatile organic analysis (VOA) vials <br /> containing 0.5 milliliters hydrochloric acid(18%0)as preservative. The samples were labeled,logged <br /> on a chain-of-custody form,placed in a chilled container and transported to MAI. Each sample was <br /> analyzed for TPH-g,BTEX and MTBE in accordance with EPA Methods 8015-Modified and 8020, <br /> respectively. <br /> l? : 2.4. PROBE BORING AND SAMPLING <br /> On 13 October 2000, two soil probe borings (CBI and CB2) were advanced at the site. The probe <br /> j borings were advanced in the areas of the former fuel dispenser island (Bl) and the former UST <br /> excavation (VW-1). Probe boring locations are shown on.Figure 2. Probe borings CB 1 and CB2 <br /> were advanced at the locations of soil boring B 1 near the former dispenser island and near the area <br /> of vapor extraction well VW-1, respectively, to-allow for-hydrocarbon concentration comparisons. <br /> Both borings were advanced to a depth of 35 feet below surface grade (bsg). <br /> i <br /> Advanced GeoEnvironmental,Inc. <br /> I - <br />