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CLEARWATER <br /> G R O U P I N C <br /> Environmental SLevices <br /> 3.0 FIELD ACTIVITIES <br /> Prior to sampling, each monitoring well was gauged to the nearest hundredth of a <br /> foot The wells were purged of at least three well casing volumes and purge water <br /> temperature, conductivity, and pH measurements were collected Monitoring well <br /> gauging and purge data are included in Appendix A. <br /> Each groundwater sample was collected with a dedicated polyethylene bailer and <br /> was transferred to sample containers appropriate for the required analyses Sample <br /> containers were labeled with well numbers and placed in a cooler A chain-of- <br /> custody was prepared and accomparued the samples to the laboratory Groundwater <br /> sample analyses were performed by American Environmental Network (AEN), <br /> DHS-certified laboratory located in Pleasant Hill, California All groundwater <br /> samples were analyzed for <br /> • TPHg by EPA Method 5030 (purge and trap) with detection using gas <br /> chromatography flame ionization detectors <br /> • BTEX and methyl tertiary-butyl ether (MTBE) by EPA Method 8020 <br /> D-103 2Q96 2 Judy 11, 1996 <br />