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FZUniitedEnvironmental Investigation May 15, 3990 <br /> ervice Station 6100, Tracy, California AGS 30041-IW <br /> Q4 <br /> driven 18 inches with a standard 140-pound hammer dropped 30 inches. The number of <br /> ® blows required to drive the sampler each successive 6-inch interval will be counted and <br /> recorded on the held boring log to give an indication of soil consistency. Examples of the <br /> Field Boring Log, the Unified Soil Classification System, and Log of Boring are included ' <br /> in the appendix to this work plan. <br /> i <br /> i <br /> Soil samples collected for possible chemical analysis will be promptly sealed with aluminum z <br /> foil, plastic caps, and tape. They will then be labeled and placed in iced storage for <br /> transport to the analytical laboratory. A Chain of Custody Record will be initiated by the <br /> field geologist and will accompany the soil samples to the laboratory. An example of the , <br /> Chain of Custody Record is also included in the appendix. After the borings are <br /> terminated, the borings will be backfilled with a slurry of cement, bentonite, and water. <br /> ® 3 <br /> Disposal of Soil Cuttings <br /> ;y <br /> ® Soil cuttings generated during drilling will be stored.onsite and covered with plastic <br /> sheeting. If possible, drill cuttings exhibiting subjective evidence of gasoline hydrocarbons <br /> or producing a positive response on the PID will be separated from those drill cuttings <br /> evaluated as having no gasoline hydrocarbons. Four discrete soil samples will be collected, <br /> composited into one sample at the laboratory, and analyzed for appropriate gasoline <br /> g <br /> Aool ed Ge®Sy.stems <br />