Laserfiche WebLink
A <br /> ME <br /> 1r- <br /> 1 '. <br /> collection, the ends of the brass tubes were covered with aluminum foil, plastic end-caps, <br /> and sealed with duct tape. Each brass tube was labeled, and placed in an ice chest chilled <br /> ! to 4'C for transport to California Water Laboratory in Modesto, California for analysis. <br /> California Water Laboratory is a Department of Health Services certified hazardous waste <br /> laboratory (certificate No. 130). Each of the three soil samples collected from the north, <br /> +z. east and west walls of the excavation were collected from 'visibly" clean material. The soil <br /> t a sample collected from the south wall however, was obtained from the visibly stained area <br /> r� approximately 4 feet above the water table. The sample was taken directly from the <br /> excavation using a driven-tube type sampler and a clean 2 x 4-inch brass tube. Following <br /> i <br /> the extraction of the brass tube from the sampler, the tube was prepared for transport to <br /> the laboratory as described above. Formal chain-of-custody records were maintained and <br /> submitted on each sample. <br /> i� <br /> t 3.2 Water Sample Collection <br /> fr <br /> A sample of the standing water in the excavation was obtained on January 17, 1990. Prior I <br /> to sample collection, the excavation was purged of all standing water. The purged water, <br /> - f'J ? <br /> approximately 500 gallons, was removed by vacuum truck for off-site disposal at the <br /> Chemical Waste Management Facility at Kettleman Hills. No free product was visible on <br /> L. the surface of the water prior to purging. The water sample was collected utilizing a clean ! <br /> ;. �:••. Teflon point-source bailer. A clean, unused bailer line was used to lower the baiici• into <br /> { the excavation. The sample was taken from the surface to about 12-inches below the <br /> surface of the water in the excavation. The sample was transferred to a single 40 ml <br /> volatile organic analysis (VOA) vial with only limited agitation, using the sampling port on <br /> the bailer. The VOA vial was labeled and placed in the chilled ice chest for transport to <br /> the analytical laboratory. <br /> i <br /> -- 7 <br />