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D � <br /> ocf <br /> T ? <br /> in, 1988 <br /> DEPTH <br /> We will be taking core samples using the standard six inch steel sleeve soil core <br /> collector. At the bottom of the six excavation areas, we will take six—inch core <br /> samples that will be tested (thus named testing samples). <br /> Sample site 1. The testing sample will be taken at the nadir of the excavation at 2 <br /> ft. below grade. <br /> Sample site 2. This site is more superficial and thus we will take the testing sample <br /> about a foot and a half below grade. <br /> Sample site 3.. This area was specified in the Dames and Moore report as <br /> contaminated. This spill had saturated about six inches of soil that covered an old <br /> concrete road. We have broken up the concrete and will take the testing sample one <br /> foot below grade. <br /> Sade site 4. This is an area where the soil was darkened. We will take the testing <br /> sample from the bottom of the pit, two and one half feet below grade. <br /> Sample site S. This was the darkened soil area north of the building. The testing <br /> sample will be taken at the bottom of the pit which is about three feet below grade. <br /> Sample site 6. The site was an area of surface saturation. On the surface were <br /> discarded oil filters which apparently had been discarded after an oil change. We <br /> will take the testing sample at the bottom of the excavation, two feet below grade. <br /> In addition, we will take samples from 12 inches and 24 inches below the original <br /> testing samples. (Sample sites 1, 2, 3, 4, S, and 6.) <br /> These twelve supplemental samples (the 12 inch— and 24 inch—deep samples) will be <br /> held by Canonie Environmental (California Department of Health Services Hazardous <br /> - Waste Certification Number 130) and will be tested later if deemed necessary by the <br /> parties involved. <br />