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Y <br /> r <br /> H 1605 SOLRh EI Dorntla.Sto�kN ,,.,64.ULTS f{3{7FiE <br /> n,CWifo/niq <br /> i 1,0 is TRODuc-nom <br /> This report documents the results of the limited subsurface investigation <br /> July 2 and 3, 1991, at the Exxon Company, i . conducted on <br /> 1605 South EI Dorado Street, in Stockton, California (Figure 1)_service}� report rsion lbased friocated t <br /> part, on information provided to Aegis Environmental, Inc. (Aegis), b <br /> Ll subject to modification as newly acquired information may warrant. <br /> y Exxon and is <br /> 1.11 Pprpase <br /> a <br /> The purpose of this investigation was to: <br /> F Further character-ze the shallow subsurface and hydrogeofogic conditions <br /> at the site; and <br /> I-' Determine the extent of petroleum hydrocarbons potentially within soils and <br /> groundwater beneath the site. <br /> It" 1.2Scpoe <br /> The completed scope of work performed is summarized below, and was in accordance <br /> with Aegis' standard operating procedures (SOP) included in Appendix A: <br /> �"SY <br /> On July 2 and 3, 1991, three soil borings were drilled on site to a depth of <br /> 55 feet below surface. <br /> • Soil samples were collected at 5-foot intervals from each boring, beginning <br /> i at 5 feet below surface. Soil samples were <br /> to the logged and classified according <br /> Unified Soil Classification System. cor.sng f <br /> ! The collected soil samples were screened for the presence of organic <br /> vapors with a portable photoionization detector (PID). <br /> hest readin <br /> from each sample was recorded on the soil boring logsh. Thhe e soil samples <br /> were selected for laboratory analyses based on the PiD readings, <br /> descriptions, and depths. <br /> The borings were completed as three 4-inch-diameter groundwater <br /> monitoring wells. The wells were grouted (seated)under the supervision of <br /> a San Joaquin County Public Health Service/Environmental Health Division <br /> (SJCPHS/EHD) representative. <br /> • The drill cuttings were screened for the presence of organic vapors with a <br /> a P)D. The drill cuttings were stockpiled on site on a <br /> �...' sheeting. Samples were collected and covered by plastic <br /> o lectr✓ <br /> d #rom The stockpile <br /> characterization and disposal purposes. pile for Sail <br /> 97.044B.RRT . . <br />