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21 January 2004 <br /> • AGE-NC Project No 04-1129 <br /> Page 2of5 <br /> To preserve each collected sample, both ends of the leading or other selected sleeve were covered <br /> with Teflon sheets, capped and sealed with tape The samples were labeled, stored on ice and <br /> transported under chain-of-custody to Cal Tech Environmental Laboratories (CTEL), a State of <br /> California Department of Health Services (DHS)-certified analytical laboratory <br /> 32 LOGGING <br /> Soil was extruded from a second brass sleeve and was screened for the presence of organic vapor <br /> using an organic vapor meter (OVM) equipped with a photo-ionization detector (PID Thermo <br /> Environmental 580B, 10 0 eV, calibrated to isobutylene), and the OVM readings were recorded on <br /> I a boring log The soil was then visually described on the boring log in accordance with the Unified <br /> Soil Classification System (see Appendix B) <br /> I3 3 LABORATORY ANALYSES OF SOIL SAMPLES <br /> . Selected soil samples were analyzed for <br /> • Total petroleum hydrocarbons quantified as diesel(TPH-d) in accordance with EPA Method <br /> 8015 Modified, and <br /> • Benzene,toluene, ethylbenzene and total xylenes (BTEX) in accordance with EPA Method <br /> 8021B <br /> 34 QUARTERLY WELL MONITORING PROCEDURES <br /> Quarterly ground water monitoring was performed on monitoring wells MW-1 through MW-3 on <br /> 12 May 2003 <br /> 3 4 1 Well Evacuation and Monitoring <br /> A Solinst water level meter was used to measure the depth to ground water in monitoring wells <br /> MW-1 through MW-3 relative to the tops of the well casings (well heads) After water levels were <br /> gauged, a Watera internal pump was used to evacuate (purge) each well of a minimum of three <br /> Icasing-water volumes (approximately 5 25 to 5 75 gallons) of water Temperature, pH, and <br /> conductivity were measured at regular intervals using an Oakton water analyzer The field data sheets <br /> are included in Appendix C Purged water was stored on site in 55-gallon drums <br /> Advanced GeoEnvironmental,Inc <br /> I <br />