Laserfiche WebLink
{ <br /> t <br /> SOIL SAMPLING PROTOCOL <br /> x: I. SOIL SAMPLING BY DRILLING RIG <br /> 1) Review site proposal for boring locations and special instructions. Confirm <br /> boring Iocations 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 /> i but is not limited to, augers, bits, drilling rod, samplers, and brass sampler <br /> liners. 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 ryboring 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 /> a' recorded on the boring Iog. When necessary, the sampler may be pushed by. <br /> 14 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 /> . s <br /> retrieved to the surface. <br /> t <br /> k� 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 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 /> r.. l sampler, equipped with brass liners, is used except when the analysis will <br /> include copper or zinc. In this instance, the sample should be taken with the <br /> standard penetrometer and placed in a labeled plastic bag. <br /> 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 /> P g <br /> Latest Revision: March 28, 1990 <br />