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za r M ME �.W Soil Sampling Soil samples were taken at 5-foot intervals, or at significant lithologic changes in the soil,beginning at 5 feet below the ground surface. All samples were examined in the field for evidence of contamination. Examination included visual observations and detections of odor. Selected soil samples were submitted for laboratory analysis. Soil samples were taken with a California modified split-spoon sampler fitted with brass tube liners. The split-spoon sampler and brass liners were cleaned prior to use with an Alconox and water solution then rinsed with clean water. All augers and bits were steam cleaned prior to beginning all borings. Soil samples were collected by inserting the sampler into the augers and hammering it into the soil to the desired depth. The sampler was then removed from the augers, and the brass liner containing the sample was removed from the sampler. The soil sample was _ examined for evidence of contamination. Any brass tubes containing samples exhibiting evidence of contamination were covered with Teflon tape and covered with plastic caps to make airtight seal. The brass tubes were labeled with the boring number, sample interval depth, samplers initials, date, time and location. The samples were then submitted to a mobile laboratory located on-site. Samples of first aquifer formation were collected for sieve analysis and permeability testing. Samples of underlying clay were also collected for permeability testing. Sampling of Stw piled Soil Twenty-five composite samples of the contaminated stockpiled soil were collected to characterize the soil for purposes of remediation permitting procedures. Each composite sample was composed of four discrete soil samples. The four discrete samples were collected approximately every 12 feet throughout the length of the pile at a minimum depth of 1 foot below the surface. The soil samples were collected by cutting a hole through the Visqueen that covers the stockpiles. Each discrete sample was collected by pounding a brass tube into the soil with a mallet. The brass tubes were retrieved and �- covered with Teflon tape and capped with plastic caps to make airtight seals. The brass tubes were labeled with the sample number, sampler's initials, date, time, location, and analysis :a required. The sample was logged on a chain-of-custody form and in -a-field book. The samples-were then-submitted to a mobile laboratory located on-site.- �d 2-2 �3