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Kennedy/Jenks Consultants <br /> The hydraulic push-drive system (GeoprobeTM or equivalent)will be advanced using 2-or <br /> 3-inch outer diameter(OD) steel rods where the lead rod is fitted with a new acetate liner. The <br /> soil core is collected in the acetate liner as the rods are advanced in 4-foot or 5-foot <br /> increments. <br /> The desired sample interval is cut from the acetate liner when it is retrieved. Discrete soil <br /> samples will be collected from each boring at a depth of 5 feet bgs, 10 feet bgs and 15 feet <br /> bgs. <br /> If the coarse-grained subsurface is too dense to allow advancement of a hydraulic push-drive <br /> sampling system, the drilling system will be changed to hollow-stem augers and samples will <br /> be collected using a split-spoon drive sampler. The sampler will be fitted with metal liners and <br /> driven to the desired sampling interval, whereupon the sampler is removed and the <br /> appropriate metal liner is capped and sealed as described above for submittal to the <br /> laboratory. <br /> Soil borings will be sealed with neat cement or hydrated bentonite chips in accordance with <br /> SJCEHD requirements. Drilling residuals (soil cuttings and decontamination rinsate water)will <br /> be placed in sealed containers, pending characterization and coordination for offsite disposal. <br /> The containers will be marked and placed in a secure location designated by BNSF. <br /> Following acceptance, the drilling residuals will be transported to an appropriately permitted <br /> offsite disposal facility. <br /> Re-usable sampling equipment will be decontaminated between locations either by <br /> steam-cleaning, or washing using non-phosphate soap, a potable water rinse, and a final <br /> distilled water rinse. <br /> BNSF Mormon Yard—Soil Sampling HASP <br /> Mormon Yard, Stockton, California <br /> Kennedy/Jenks Consultants©, March 2015 Page 7 <br /> g:llsgroupWminUo611311383gN1.W bnaAU0.pmfadminlhasplhasp.tloc <br />