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8 <br /> • <br /> Sampling Protocol <br /> Soil 'i <br /> Soil samples were obtained from core samples taken every 5 feet during drilling, <br /> utilizing a split-spoon sampler with brass sleeves The samples were contained within the <br /> brass sleeve, covered with aluminum.foil and sealed with plastic caps The plastic cap <br /> was taped to the brass sleeve with duct tape so that an airtight seal was obtained Samples <br /> were marked and placed in a cooled environment during transportation to the laboratory <br /> A Chain- Of-Custody was properly completed by the sampler and signed by the <br /> laboratory Detection limits were supplied by the laboratory <br /> The split-spoon sampler and the brass sleeves were decontaminated before each <br /> sampling event They were washed with detergent and water, and then rinsed with water <br /> and finally rinsed with distilled water <br /> Core samples were screened with an OVA meter and the readings were recorded <br /> on the drill logs These readings were used to help select the soil samples for laboratory <br /> analysis <br /> Groundwater <br /> A 2" pump was used to purge the water from the wells A 2" PVC disposable <br /> bailer was used to withdraw the samples after recovery of at least 80% of the pre-purged <br /> well volume All equipment, including the bailer, and the water depth measuring device <br /> • were decontaminated prior to entering any well They were decontaminated by washing <br /> with detergent and water, then thoroughly rinsed with clean water, and finally rinsed with <br /> distilled water <br /> The depth to the ground water was measured from the highest point on the top of <br /> the casing to the surface of the water table The devise used was an electric conductivity <br /> device which trips a red light and buzzer when the probe touches water A mmmmum of <br /> three measurements were made at each well, the final reading was noted after two or more <br /> readings did not vary by more than 0 003 feet <br /> Once the depth to water was known, the tape and probe were withdrawn from the <br /> well and thoroughly dried A small amount of water paste was placed on the axis of the <br /> probe and the probe was lowered to the water table Care was taken not to allow the <br /> probe to descend into the water below the contact point Then the probe was withdrawn <br /> rapidly and inspected for signs of free product above the contact point If free product <br /> was noted, the sample was smelled to verify it was a petroleum hydrocarbon, then the <br /> thickness of the free product was noted on the well log <br /> i <br />