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' s <br /> I SCOPE OF WORK <br /> i <br /> } SUBSURFACE SITE ASSESSMENT! <br /> y PURPOSE <br /> The purpose of work as outlined is to provide a subsurface <br /> assessment of the presence of petroleum hydrocarbon contamination <br /> in the soil and/or groundwater at the Thrifty Oil Co. ( 'Thrifty' ) <br />+ properties referenced on the attached lists: <br /> l <br /> SOIL BORINGS <br />` Four soil borings will be installed in the i" area adjacent to the <br /> underground gasoline/diesel storage tanks. ; The location of these } <br /> borings shall be 'subject to Thrifty's approval. . the borings will <br /> ,d <br /> be a minimum of 21 in diameter and to a depth- of twenty feet or# <br /> groundwater, whichever first occurs. <br /> Boringe vill be installed with a truck mounted ` hollow stem auger <br /> drill rig equipped with a continuous core sampler. <br /> 3 <br /> k <br /> Soil cuttings shall be placed in 55 gallon drums pending results <br /> of laboratory analysis. If the soil is free of contamination, <br /> the disposition shall be the responsibility of the contractor. <br /> If contamination exists, disposition ;J', shall be Thrifty's <br /> responsibility. A <br /> ill <br /> The borings shall be backfilled to a depth of five feet with a <br /> mixture of bentonite and clean native soil. The remaining five <br />