ARCHIVED REPORTS XR0010474 - Laserfiche WebLink

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4 of 8 Pages • Sampling F'rc,tocol . Soil saniplPs will be r-)btained from the core samples taken every 5 feet during drilling A split spoon sampler with brass slerves will by used The samples will remain within the brass sleeve covered with aluminum foil, and capped with the plastic �aP- ; which are supplied with the sleeves The plastic cap will be taped to the brass sleeve using duct tape so that an air tight seal is obtaintd Samples will be marked and placed in a +looler of ice until they are turned over to the laboratory, which should be within 48 hours of the drilling A Chain of Custody will be filled out by the sampler and signed by the laboratory The split spoon sampler and the brass sleeves will be decontaminated before each sampling event They will be washed with Tri-sodium phosphate detergent and water and rinsed thoroughly with clean water Core sample:, can be measured with a OVA meter and the readings will be recorded on the drill log These readings will be used to hF;lp select the cores to be sent for laboratory analysis A minimum of two :ore :samples will be sent for analysis One of these samples will be from the capillary fringe If possible, one sample will be sent which is thought to be free of contaminant and one that is thought to be contaminated. One . sample will be sent for at least every 15 feet of drilled hole above the water table If the water table is at 10 feet or less then only 2 samples will be taken and analyzed. Water The equapme;nt used to withdraw water from the well will be 2 PVC bailers One bailer will be used to purge the well and the other will be used to withdraw the sample All equipment including the bailers, and bailing cord, and the water depth measurinj-x devise must be decontaminated prior to entering any well They will be decontaminated by washing with Tri-sodium Phosphate detergent and water and thoroughly rinsing them with clean water The depth to groundwater will by measured from the highest point on the top of the easing to the surface of the water table The devi.e used will be an electric conductivity devise which trips a red light and a bu--zer when the probe touches water A minimum of three measurements will be made at each well, the final reading will be noted after 2 or more readings do not vary by more than 0 03 feet Once tf,eb (depth tri water i;; known the tapeand probe will be withdrawn from the well and thoroughly dried A small amount of water pal.to will be placed on the axis of the probe and the probe will be lowered to the water table Care will be taken to not allow the probe to descend into the water below the contact Point. Then the probe will be withdrawn rapidly and inspected for signs of fluid above the contact point If fluid is noted the is will be smelled to verify it is fuel, then the thickness Of the fuel will be noted on the measuring log.