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SMITH ENVIRONMENTAL TE TEL : 1 - 209 - 579 - 2106 May 01 ' 97 8 : 47 No . 001 P . 04 <br /> b <br /> IIarea will not be required by the PH5/EHD. The samples from these three borings, six samples <br /> total, will be analyzed for TPHg, BTEX, and total lead only. <br /> i <br /> Task 4: Well Development and Groundwater Samnlin¢ <br /> Measurement of depth to water in all wells will be completed to evaluate the direction and <br /> magnitude of the groundwater gradient beneath the site. The new wells will be developed using <br /> surge and bail techniques until the produced water is relatively sediment free. Prior to the <br /> collection of groundwater samples, a minimum of three well volumes (casing and sand pack) will <br /> be purged. Temperature, pH, water elevation, and electric conductivity will be measured and <br /> allowed to stabilize. Water samples will be collected using disposable bailers, one dedicated to <br /> each well. <br /> Groundwater samples collected from all monitoring wells will be submitted using chain-of- <br /> custody record to a State-certified laboratory. Groundwater samples, three total, will be analyzed <br /> for TPHg, BTEX, and total lead only. Purge water will be stored in 55-gallon drums approved <br /> for hazardous liquid storage pending laboratory analysis. Purge water disposal has not been <br /> included in this proposal . if necessary based on analytical results, an estimated budget for <br /> disposal will be prepared under separate cover. <br /> l <br />