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Patten Steel Compa" <br /> Phase It Soil Resa"WHng <br /> L 1.0 INTRODUCTION <br /> This site had two underground fuel tanks removed in July of 1986. One tank was a <br /> L10,000 gallon gasoline tank, the other was a 8,000 gallon diesel fuel tank. Samples <br /> were taken at the time of removal, however detection levels reported were not low <br /> enough and lead was found at 22 mg/kg. At that time laboratories were not testing for <br /> Lorganic lead, the test results are for total lead, leaving the question of organic lead <br /> ambiguous. <br /> With this background in mind, we are proposeing to resample the site; We do not <br /> know at this time which end of the tanks were the fill ends so we are proposing two <br /> borings. In the event that we discover factual evidence that the location of the fill end <br /> was between the north end of the tanks and the pumps dispensers, we may ask to <br /> perform a single borings. A site diagram showing the former location of the tanks and <br /> the pumps is included as Figure 2. <br /> 2.0 DRIILIlVG <br /> LDrilling will be performed by Sierra Drilling Company. This company is current with <br /> San Joaquin County and the County requirements. A well drilling permit was filled <br /> prior to submitting this resampling plan with a check for $89.00 to cover the costs, as <br /> Lrequired for the permit fees. Drilling will be accomplished to a depth of 20 feet using <br /> a hollow stem auger and a sample then taken at 21 feet through the hollow stem. <br /> LPermits will be obtained as necessary for all wells (including borings) before drilling <br /> begins. The soil boring will be accomplished using a mobile mounted drilling rig <br /> employing the use of a hollow stem flight auger no less than 3 1/4-inch i.d. and 8 7/8- <br /> inch o.d. <br /> All drilling equipment will be thoroughly steam-cleaned before drilling begins to <br /> prevent the introduction of contamination from off-site and between borings to prevent <br /> cross contamination. <br /> L- The borings will be logged (Figure 3) under the direct supervision of a registered <br /> .t. engineering geologist using the United Soil Classification System. The color, texture, <br /> L <br />