Laserfiche WebLink
Quality Assurance/Quality Control Plan Page 10 <br /> Soil samples will be collected at five foot intervals, at significant changes in lithology and <br /> intervals of obvious contamination in order to develop a complete profile of soil contamination <br /> 11.2 SAMPLE COLLECTION DURING TANK REMOVAL <br /> Soil samples will be collected as soon as possible after removal of the tank Where feasible, all <br /> Preparations for soil sampling will be made prior to tank removal. Soil samples collected from <br /> a backhoe bucket or directly from the excavation floor will be collected in a thin-walled stainless <br /> steel or brass cylinder at least three inches long by one inch in diameter. From 3 to 24 inches <br /> Of soil will be removed from the immediate surface area where the sample is to be taken and the <br /> cylinder then pounded into the soil with a wooden mallet, bulk density driver, or other <br /> decontaminated driving device. No head space will be present in the cylinder once the sample <br /> is collected Care will be taken to avoid contamination of both the inside and outside of the <br /> cylinder as well as its contents. During sampling, latex gloves will be worn to prevent cross <br /> contamination with other samples One pair of disposable gloves will be dedicated to each <br /> sample collected <br /> One the sample is collected, each end of the cylinder will be sealed with aluminum foil or teflon <br /> tape and then capped with a polyethylene lid, taped, and labeled The sample will then be <br /> individually sealed in a ziplock bag and immediately placed in an ice chest containing dry ice <br /> or frozen chemical ice for delivery to a state certified laboratory Sample identification, storage <br /> and transportation will be conducted as outlined in the previous section. <br /> 11.3 SAMPLING FROM SOIL PILES OR SHALLOW SOIL PITS <br /> Soil samples will be collected and transported from excavated material in the manner described <br /> in the previous section, however, a backhoe will not be utilized. If composite samples are <br /> collected, four brass cylinders will be collected for every 50 cubic yards of material to be <br /> sampled unless otherwise specified by the lead regulatory agency. The samples will be <br /> composited by the state certified analytical laboratory personnel prior to testing <br /> • <br />