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Project No. 014-95262 <br /> Page No. 5 <br /> 1. All necessary permits will be obtained from the San Joaquin County <br /> Environmental Health Division prior to the commencement of the investigation at <br /> the project site. <br /> 2. An additional literature survey of published geologic and groundwater data in the <br /> ' vicinity of the project site will be conducted in an attempt to fully characterize the <br /> conditions present. <br /> 3. Prior to drilling, Underground Service Alert (USA) will be contacted for <br /> identification of underground utilities. Each boring location will be carefully <br /> hand-probed to a depth of approximately five feet. <br /> 4. Soil borings will be drilled utilizing a truck-mounted drill rig equipped with <br /> continuous-flight hollow-stem auger. Drilling fluids will not be used while <br /> advancing the borings. <br /> 5. Soil samples will be obtained for logging purposes in the borings at five foot <br /> intervals, beginning at grade. Soils will be logged in accordance with the Unified <br /> Soil Classification System. <br /> 6. Sampling will be conducted by means of a split-spoon sampler containing three 6" <br /> long by 2" diameter brass sleeves. <br /> 7. During the drilling process, soil will be examined for visual evidence of <br /> contamination. Additionally, the soil would be field screened with a portable <br /> photoionization detector (PID). The PID reading will be used to aid in choosing <br /> samples for chemical analysis and will be noted on the drill logs. The PID is a <br /> direct reading realtime analyzer that is capable of detecting most of the volatile <br /> constituents present in the vapor phase of affected soils. The PID that will be used <br /> 1 for this investigation uses a 10.2 electron volt lamp and is calibrated using an iso- <br /> butylene calibration gas. <br /> 8. Following sample retrieval, Teflon film will be placed over both ends of the tube. <br /> Each tube will then be capped with tight fitting plastic caps and secured by <br /> adhesiveless tape. <br /> ' 9. Samples will be labeled with the project number, sampler's initials, boring <br /> number, and the time and depth at which the sample was obtained. <br /> 10. Following sample labeling, each sample will be placed in a cooler chest with <br /> synthetic ice to limit the volatilization of any hydrocarbons present. <br /> 11. Soil borings will be back-filled using a cement/sand slurry. <br /> 12. Selected soil samples from soil borings in the vicinity of the wastewater treatment <br /> facility will be analyzed for one or more of the following: electrical conductivity, <br /> pH, chloride, phosphate, nitrate, ammonia-N, BOD, and oil and grease. Soil <br /> samples from hand auger borings near sumps, separators, etc. will be analyzed for <br /> chloride, electrical conductivity, pH, oil and grease and PCBs. Soil samples from <br /> KRAZAN&ASSOCIATES, INC. <br /> Offices Serving the Western United States <br /> 95262.WP <br />