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I <br /> IIl <br /> • i <br /> ADDITIONAL WORK PROPOSED UNDER THIS SECOND ADDENDUMr <br /> In order to determine the lateral limits of the minor amounts of <br /> contamination remaining in the soil , it is proposed to hand-auger <br /> an additional 7 borings to the west , south, and southeast of the <br /> site of the removed UST. Details of the proposed worF, are given <br /> below: <br /> 1 ) Elorings will be: made using a 3 1/4" conventional hand-auger <br /> which will bt properly Lleaned between hurings. 1f it 1s not <br /> possible to advance the borings in that manner , ?" OD solid stem <br /> flights, powered by a rotary hammer , will be used. The <br /> approximate locations of the auger holes is indicated on Exhibit <br /> "B" , ,attached. Actual locations may be varied slightly due to <br /> possible structures or other impediments. <br /> -)) Sediments penetraLed will be described and lagged by the <br /> geologist , and selected samples will be screened with a FID meter <br /> if necessary. <br /> . 3) Each boring will be advanced deep enough to encounter water; a <br /> -,oil sample, will be obtained as close to the interface as <br /> possible, using a properly prepared brass tube driven into the <br /> bottom of the hale. The tube will be properly sealed , labeled , <br /> and refrigerated pending transfer to the lab for analysis. Each <br /> sample will be to,.Mead for A"rEX & 1"PH -G. <br /> 4) The borings will be advanced deep enough to allow collection <br /> of a water- sample. The sample will be obtained in the following <br /> manner: <br /> a) A section of 2" PVC slotted well screen will be placed in <br /> the hale, e,:tendang to the bottom. <br /> b) When the hole has, stabx l x Led , the static water level will <br /> be measured , and a water sample will be collected by <br /> using a disposable plastic bailer. <br /> c) The water sample will bo placed in properly cleaned glass <br /> vials, sealed , labeled, and preserved pending delivery to <br /> the laboratory. The water s.-aMp les will be analyzed for <br /> STEX and TFH--G. <br /> 5) Upon completion of the sampling operations, the auger-holes <br /> will be properly filled with cement; spoil from the borings will <br /> be placed in steel drums for storage pending the reasLtlts of the <br /> laboratory analyzes. Zhe= properly preserved soil & water samples <br /> will be transported to a State Certified Laboratory under proper <br /> cpain--of--custody for analysis. <br /> �t <br /> h <br />