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. I � i <br /> ENVITHORI <br /> On November 3, 1988, Mr. Bill Hughes o oll ,Mazda with Nort a <br /> Construction's Environmental Departure wring the eetingI it was ecided to collect <br /> a liquid sample from an adjacent tank ocated northeast of the facility. The collected <br /> sample would be compared to the soil cOwtamination found in the a described as <br /> "Grant and Miner Avenue #1 Fill End" using a t na ysis. The analysis would <br /> ` be used to evaluate the possibility of contamination and migration from the adjacent <br /> tank. The liquid sample was collected on November 8, 1988 hand taken to FGL <br /> Laboratories for fingerprint analysis. The results of the analysis (ga chromatograph) are <br /> ` shown in Appendix A. The chromatograph from the contaminated soil and the liquid <br /> from the adjacent tank appear to be quite similar. rt. 0. <br /> y1C �U1A �r- P�-e Yri-en ,� G��� t.eJu,� S�3 <br /> Two years ago, a 1000 gallon gasoline tank was removed from the west side of the <br /> facility. There does not appear to be any record of soil analysis on samples collect <br /> during tank removal. In order to investigate the condition of the entire site, this former <br /> tank location will be sampled during boring advancement. \� , � ; ` 41' <br /> 3.0 WORK PLAN <br /> Thorne Environmental proposes to assess and define the vertical and lateral extent of soil <br /> contamination, and the source of the contamination. <br /> ` 3.1 SOIL BORINGS DEPTH AND LOCATIONS <br /> Soil boring depths will be approximately 35 feet. Soil samples will be collected at five <br /> 6. foot intervals from the surface to the total depth. Five foot sampling intervals are <br /> necessary to evaluate the extent and concentration of the soil contamination. Accurate <br /> definition of the extent and concentration of soil contamination will provide for a more <br /> efficient remediation process design. Proposed locations of borings are shown on Figure <br /> 2. These locations have been chosen to define the lateral and vertical extent of the <br /> contamination. <br /> 4.0 METHODS <br /> The methods employed implementing the above scope of work are described in this <br /> section. <br /> 4.1 BORING METHODS <br /> The borings will advanced using a Mobile Drill B-53 rig, or equivalent, with a 6 inch <br /> or larger hollow stem continuous flight auger in accordance with ASTM Method D 1452- <br /> 80 for soil investigations and sampling by auger borings. The auger will be steam <br /> cleaned prior to drilling each boring. The lithology and other pertinent data will be <br /> i.. recorded on a field boring log in accordance with ASTM Method D 2488-84 for visual <br /> description and identification of soils. <br /> 6. <br /> 4 <br />