ARCHIVED REPORTS XR0012746 - Laserfiche WebLink

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mar d-W,ter Sampl ina Prior to developing, the wells will be subjectively analyzed for floating product and/or product sheen by lowering a bailer approximately halfway through the air/water interface in the well. Depth to water in each well � -; will also be measured. The wells will then be developed by swabbing, i surge-pumping, or another suitable method until the discharge from the wells is relatively clean and free of suspended sediment. Each well will then be purged.of approximately three to four well volumes of water and/or 9:' E until temperature, pal, and conductivity readings stabilize. Each well will then again be subjectively analyzed. Any floating product observed in the wells will be removed prior to �i sampling, using a bailer. If the product can not be removed from any of +.he wells, a final measurement of the product thickness will be made and - that particular well will not be sampled. Ground water level' will be allowed to recover to approximate static , conditions in.the wells, and the water level. will again be measured. If i r the water level is a<; or greater than 80% of the initial measured level, a clean bailer will be used to obtain a sample from the surface of the water in the well. Any.subjective evidence of product detected in the well .will be recorded. ; Water-s.ampies willbe .collected using a disposab7u bailer or a'Teflon bailer cleaned with Alconox and rinsed with tap and deionized water. The water samples Will be sealed in laboratory-ciealied; 40-milliliter glass,. vials with Teflon-lined lids. The samples will 'then'be labeled and immediately placO in iced storage. A:Chain.of Custbdy .Record :will be # initiated by the field geologist or engineer and will accompany the samples to a 1abo'-story certified in:the State of California for .the analyses request A copy. the Chain:of Custody Record will be 1 included -in our final report. 4 f I S ti Y. 1 'lx�,7 Tom; ti xis q -