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sa ; <br /> d rrj. ax -m ytea. "MS. �. <br /> � '3^�. �.r}`~�,. ,�,. fix`' r'� �a+Y �. "�` s,.�;' _ � _i,. ° � r. •9 . <br /> SOIL SAMPLING PROTOCOL <br /> I. SOIL SAMPLING BY DRILLING RIG <br /> 1) Review site proposal for boring locations and special instructions. Confirm <br /> boring locations in field with client. Have Underground Service Alert (USA) <br /> mark utilities in area prior to drilling. <br /> 2) Prior to initiating an exploratory boring,all equipment to be used during drilling <br /> and sampling operation is steam cleaned. Such equipment includes, but is not <br /> lirmted to, augers, bits, drilling rod, samplers, and brass sampler liners. <br /> Additionally,between sampling intervals,the sampler is thoroughly cleaned with <br /> a dilute trisodium phosphate solution and rinsed with clean tap water or distilled <br /> watc.. <br /> 3) Each exploratory boring is drilled with a truck-mounted drilling rig using either <br /> solid flight or hollow stem augers. The boring is advanced to the desired <br /> sampling depth and the sampler is lowered to the bottom of the hole. The <br /> sampler is driven a maximum of 18 inches into the undisturbed soils ahead of the <br /> auger by a 140-pound, rig-operated hammer falling 30 inches. The number of <br /> blows required to drive the sampler the final 12 inches is recorded on the boring <br /> log. When necessary,the sampler may be pushed by the drill rig hydraulics. In <br /> - this case,the prrssure exerted(in pounds per square inch)is recorded. After the <br /> sampler has penetrated the full depth,it is retrieved to the surface. <br /> 4) The samplers commonly used are either a California modified sampler (3 inch or <br /> 2.5 inch O.D.) or a standard penetrometer (2 inch O.D.). The standard <br /> penetrometer does not contain sample liners and is used to determine soil strength <br /> characteristics and visually characterize the subsurface materials.If samples are <br /> collected for laboratory analysis the California modified sampler,equipped with <br /> brass liners,is used except when the analysis will include copper or zinc, lr, this <br /> instance,the sample should be taken with the standard penetrorneter and placed in <br /> a labeled plastic bag. <br /> Upon retrieval, the sampler is disassembled into its czmponent parts. One or <br /> more of the liners is selected for chemical analysis. The ends of the selected <br /> liner(s)are sealed with aluminum foil or teflon tape,capped with plastic caps, <br /> EXCELTECH, INC. <br /> Soil Sampling Protocol <br /> M Latest Revision: March 28, 1990 <br />