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r <br /> 1 71 -90 <br /> containing essentially the same information as the chain of custody record with the <br /> addition of any observations about the sample. <br /> Soil samples were delivered to Beckman Environmental Laboratory, a State Certified <br /> hazardous waste testing laboratory, within 48 hours after the samples were collected. <br /> I _ <br /> The temperature was maintained at 4 degrees Celsius in the insulated storage container <br /> prior to delivering to the laboratory. The storage container temperature was recorded <br /> upon delivery at the laboratory. Once the samples were delivered to the laboratory, the <br /> chain of custody was signed by the laboratory indicating that the possession of the <br /> ,.; samples had changed. The soil samples were analyzed within the required 14 day period <br /> following collection. <br /> Ia <br /> i --' GROUNDWATER MONITORING WELL CONSTRUCTION <br /> I <br /> All the groundwater monitoring wells were completed using thread jointed 4 inch <br /> E_ <br /> diameter Schedule 40 PVC casing. No chemicals,glues,or solvents were used in the well <br /> r r construction. The screened portion of the well was 14 feet in length and consisted of <br /> factory perforated 0.020 inch slots. <br /> t , <br /> The slotted pipe was installed within a depth interval of 10 to 24 feet below the ground <br /> f <br /> surface. The water labia is at a depth of approximately 18 feet below the surface. This <br /> placed the top screen perforation approximately 8 feet above the water table. <br /> The bottom of the screen was fitted with a screw on end cap and lowered into the boring <br /> through the hollow stem auger. The remaining casing was assembled as the pipe was <br /> lowered Into the baring through the hollow stem auger. <br /> ' 11 <br />