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1 <br /> CLEARWATER <br /> r <br /> G R O U P I N C <br /> E>aviron mental Seat res <br /> Before sampling, each well was purged until water quality parameters had stabilized <br /> Stabilization occurred after approximately three wet casing volumes had been removed Prior to <br /> purging, all wells were checked for the presence of light non-aqueous-phase liquids (LNAPL), <br /> none was observed to be present in any well Stabilization measurements of purged groundwater <br /> temperature, conductivity, and pH were made and recorded for each well prior to sample <br /> collection <br /> Following purging, each well was allowed to recharge to at least 80% of its static water level <br /> prior to sampling Groundwater samples were obtained from each well using disposable <br /> polyethylene bailers and decanted into clean laboratory supplied bottles Samples were labeled, <br /> documented on a chain-of-custody form, and placed on ice in a cooler for transport to the project <br /> laboratory Groundwater samples were analyzed by Kiff Analytical Labs, located in Davis <br /> California, a California State-certified laboratory, for concentrations of TPHg, BTEX and MTBE <br /> by EPA Method 8260B All field work was conducted in accordance with Clearwater's <br /> Groundwater Monitoring and Sampling Field Procedures and Natural Attenuation Processes <br /> and Recommended Monitoring Guidelines included in this report as Appendix A <br /> ZB178C/1stQtr2004 Monitoring Rpt 5 April 15,2004 <br />