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Y <br /> 3 <br /> Work Plan September 5, 1990 <br /> Arco Service Station 2076, Lodi, California AGS 30008-IW <br /> 18 inches with a standard 140-pound hammer dropped 30 inches. The number of blows <br /> required to drive the sampler each successive 6-inch interval will be counted and recorded <br /> on the field boring log to give an indication of soil consistency. Soil samples will be <br /> collected,identified, and evaluated for relative levels of gasoline hydrocarbons using a PID <br /> when appropriate. Examples of the Field Boring Log, the Unified Soil Classification <br /> System,and Log of Boring are included in the appendix to this work plan. <br /> Soil samples collected for possible chemical analysis will be promptly sealed with aluminum <br /> foil, plastic caps, and tape. They will then be labeledand 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 /> } <br /> Chain of Custody]Record is also included in the appendix. After the borings are terminated, <br /> f 5 <br /> the borings will be backfilled with a slurry of cement,bentonite, and water. f <br /> ' Dis bsa of of utt. <br /> HI be stored onsite and covered with plastic sheeting, <br /> Soil cuttings generated during drilling w <br /> t <br /> If possible, drill 'cuttings exhibiting subjective evidence of gasoline hydrocarbons or <br /> �i producing a positive response on the PID will be separated from those drill cuttings <br /> `Pil <br /> ' evaluated as having no gasoline hydrocarbons. At ARCQ's request,we will submit the soil — <br /> ' - <br /> 9 <br /> 4900Sy49rems <br /> , - <br /> a <br />