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referenced to designated measuring points at the top of each well casing During depth to water <br /> measurements, no floating product was detected <br /> 2-2 MonitoringWell Sampling <br /> P 9 <br /> Prior to sampling, dissolved oxygen (DO)measurements were collected from the wells using <br /> field ampoules_ A new polyethylene bailer was then used to remove at least three well-casing <br /> volumes of water from each well The groundwater quality parameters, pH, specific <br /> conductivity, and temperature were measured periodically in the purge water stream to evaluate <br /> stable water from the formation was present and suitable for sampling Copies of the <br /> groundwater sample collection logs are included in Appendix A <br /> Groundwater samples were collected using the single-use polyethylene bailers that had been used <br /> for purging The samples were transferred from the bailers into four 40-m1 VOA sample <br />' containers supplied by the analytical laboratory Following collection, the sample containers <br /> were labeled, placed in an ice-packed cooler, and transported to the laboratory under <br /> chain-of-custody protocol The chain-of-custody record is included in Appendix B <br /> 2.3 Groundwater Sample Analysis <br /> The groundwater samples were submitted for analysis to McCampbell Analytical, Inc , an ELAP- <br /> certified laboratory located in Pacheco, California, for analysis The samples collected were <br /> analyzed for TPH-D by EPA Method 8015, BTEX constituents by EPA Method 8020, and <br /> MTBE by EPA method 8260B <br /> 3.0 Results of Groundwater Monitoring <br /> 3.1 Field Monitoring Results <br /> The average measured depth to water beneath the site was 10 89 feet bsg, with an average <br /> measured groundwater surface elevation of 38 66 feet above mean sea level (msl) No field <br />' indications of fuel product or dissolved fuel constituents were observed Groundwater flow was <br /> estimated toward the north at an average gradient of 0 004 foot per foot A summary of data for <br /> water level measurements and groundwater elevations is presented in Table 1 A groundwater <br /> contour map is included as Figure 3 <br /> CNCD/O SHARE/UST/03-0183 doc <br />' 3 <br />