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1 INC <br /> 'art <br /> { z <br /> y tafi: <br /> nInc . <br /> An Environmental Services Company <br /> March 25, 1991 <br /> Mr. Zachary Deutsch <br /> City Thrift and Loan Association <br /> 8345 Hayvenhurst <br /> P.O. Box 2197 <br /> Sepulveda, CA 91343 <br /> Environmental Assessment and Remediation at 305 South <br /> Hutchins Street, Lodi, CA <br /> Dear Mr. Deutsch: <br /> As you are aware, a drilling rig equipped with 811-outside <br /> diameter, continuous-flight, hollow-stem augers was recently <br /> used to advance three soil borings at the referenced site. <br /> The locations of the borings (designated #s-1 , #s-2, and #S-3 ) <br /> were advanced at those locations shown on Figure #1 , dicated <br /> inattached, <br /> n order to enhance previously acquired data which in <br /> the presence of fuel hydrocarbon contaminants within. subsurface <br /> soils. <br /> Only soils encountered within Baring 03 contained odors <br /> consistent with those of fuel hydrocarbons. These odors were <br /> moderate between 14 . 5 ' and 17. 0 ' below ground surface (bgs) p <br /> 5 <br /> and strong between 19. 0 ' and 20. . As the capillary .fringe <br /> was encountered, S-3 was terminated at 20. 5 ' to avoid introducing <br /> contaminants into the groundwater. <br /> A two dimensional, representation of blows per foot (BPF) for <br /> each of the borings advanced are presented in Figure #2. BpF <br /> are indicative of the relative density/consistency of the soil. <br /> As indicated, the relative density/consistency of soils <br /> encountered at the South Hutchins Street site appear to increase <br /> as one proceeds north from Baring #S-3 towards Borings #S-1 <br /> and #S-2. <br /> A profile of the soils in the area of the borings is presented <br /> in Figure #3 . The sandy clay layer ( CL) encountered in Borings <br /> #S-1 and #S-2 would likely serve as a barrier to contaminant <br /> migration to the north. <br /> In order to acquire the additional information about the vertical <br /> 1 . <br /> 464 Lindbergh Avenue 0 Livermore C allfornia 941;1;n 0 <br /> 47 c;) 455__�Aaj <br />