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1,221 <br /> r <br /> March 9, 1988 AGS 038009-1 <br /> Fire Engine Company No. 2, Stockton, California <br /> During drilling, soil samples will be collected at 5--foot <br /> intervals using a California-modified split-spoon sampler <br /> equipped with laboratory-cleaned brass sleeves. Samples will be <br /> collected by advancing the boring to a point immediately above <br /> r+ <br /> the sampling depth, then driving the sampler into the native soil <br /> through the hollow center of the auger. The sampler will be <br /> driven is inches with a standard 140-pound hammer dropped 30 <br /> inches. The number of blows required to drive the sampler each <br /> successive 6 inches will be counted and recorded to give an <br /> indication of soil consistency. Examples of a Field Boring Log <br /> form, Plate P-3, as well as a Boring Log Plate used in our final <br /> report, Plate P-4, are included with this report. <br /> Samples collected for possible chemical analyses will be sealed <br /> with aluminum foil, plastic caps, and airtight tape. They will <br /> then be labeled and immediately placed in iced storage for <br /> transport to the analytical laboratory for testing. Chain of <br /> Custody Records will be initiated by the sampler and will <br /> accompany the samples to the laboratory. Copies of these records <br /> will be presented in our Problem Assessment Report. An example <br /> of a Chain of Custody Record is included in this report (Plate <br /> P-5) . <br /> 10 <br /> V <br /> -Applied GeoSyetems <br />