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ETS ENVIRONMENTAL <br /> PAGE i <br /> • <br /> •1. 0 I.NTRODUCT I ON <br /> This preliminary site assessment has been prepared by <br /> ETS Environmental for- EZ Gas and Mini mart 1c�cat ed at 14�>5 <br /> Main Street in Escalon, California. A total of six soil <br /> borings were drilled at the site on June 261 1988 in the <br /> vicinity of three undergro=und storage tanks. <br /> The boring locations were determined by an underground <br /> tank location survey conducted by California Geological, Inc. <br /> of Modest•,, California. The b_,rir,gs were placed at the ends <br /> or along the sides of the tanks in order t.� best determine <br /> whether the site had any history of leakage (Figure 1-1) . <br /> I <br /> 2. 0 METHODS AND PROCEDURES <br /> I <br /> I <br /> A proposal to conduct the scope of work completed was <br /> submitted to the San Joaquin 'L,_-cal Healthy District on May 19, j <br /> 1988. Approval was granted on June 14, 1988 with the <br /> issuance of a soil burin permit number 88-1513. <br /> 9 P Underground <br /> Service Alert was contacted to mark underground utilities and j <br /> provided ETS with the ticket number 77083. r <br /> - i <br /> Sampling began June 21, , 1988 with Osterberg and Stewart I <br /> Well Drillers (1 icense number* 446670) conducting the dri 11 ing <br /> operati :in. A 1-1/2 inch diameter California modified split <br /> spoon sampler with brass sleeves was driven through 673/4 <br /> inch outside diameter hollowstern auger to collect samples at j <br /> intervals of five feet. <br /> s <br /> Soil samples collected were field inspected and legged <br /> according to their Unified Sail Classification symbol. The <br /> boring legs are attached as Appendix A. <br /> I; <br /> Borings i throughfive were drilled vertically to a { <br /> maximum depth of fifteen feet. Site conditions required that � <br /> boring .6 be drilled at a 30 degree angle from vertical. The <br /> bc�r ing was drilled in the direction indicated �_�n Figure 1-1. <br /> A11 - borings were backfilled with a nine, sack'`cernent/sand <br /> slurry .under the supervision of a San Jragi_tiri Local Health j <br /> District;._ inspector. <br /> j Inborings 1 through 5, the .five and ten, foot samples Cp ` <br /> w were ca�nposited" as shown r ��n the 1ab_-ratory results. The five au <br /> foor sample in boring 6 was unrecoverable due. to the J <br /> �lnCrnsr 1 idated nature of the material. <br /> F <br /> 1 <br /> i <br /> ? s <br /> t <br />