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1 ' <br /> SOIL SAMPLING PROTOCOL <br /> I. SOIL SAMPLING BY DRILLING RIG <br /> 1) Review site proposal for boring Iocations and special instructions. Confirn <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 <br /> drilling and sampling operation is steam cleaned. Such equipment includes, <br /> but is not limited to, augers, bits, drilling rod, samplers, and brass sampler <br /> liner,. Additionally, between sampling intervals, the sampler is thoroughly <br /> cleaned with a dilute trisodium phosphate solution and rinsed with clean tap <br /> water or distilled water. <br /> 3) Each exploratory boring is drilled with a truck-mounted drilling rig using <br /> either solid flight or hollow stem augers. The boring is advanced to the <br /> desired sampling depth and the sampler is lowered to the bottom of the hole. <br /> The sampler is driven a maximum of 18 inches into the undisturbed soils <br /> ahead of the auger.by a 140-pound, rig-operated hammer falling 30 inches. <br /> The number of blows required to drive the sampler the final 12 inches is <br /> recorded on the boring log. When necessary, the sampler may be pushed by <br /> the drill rig hydraulics. In this case, the pressure exerted (in pounds per <br /> square inch) is recorded. After the sampler has penetrated the full depth, it is <br /> retrieved to the surface, <br /> ` t 4) The samplers commonly used are either a California modified sampler (3 <br /> inch or 2.5 inch O.D.) or a standard penetrometer (2 inch O:D.). The <br /> ' standard <br /> penetrometer does not contain sample liners and is used to determine <br /> soil strength characteristics and visually characterize the subsurface materials. <br /> If samples are collected for laboratory analysis the California modified <br /> sampler, equipped with brass liners, is used except when the analysis will <br /> include coppar or zinc. In this instance, <br /> the sample should be taken-with the_._ - �. <br /> standard penetrometer and placed in a labeled plastic bag. <br /> r Upon retrieval, the sampler is disassembled into.its component parts. One or <br /> more of the liners is selected for chemical analysis. The ends of the selected <br /> EXCELTECH, INC. <br /> Soil Sampling Protocol <br /> Latest Revision. March 28, 1990 <br /> z .. <br />