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F <br /> ' '00 <br /> ' i ^t :..,s.TM:�°'r �`o'.',..n.. a�• ''" N`�- � - �`'rte'''" w[ n , -�' 8'`,' <br /> a.. i`:-, <br /> a-_. <br /> a„ <br /> Adelta <br /> Environmental <br /> Consultants, inc. <br /> 3330 Data Drive.Suite 108 <br /> Rancho Cordova,CA 95670 <br /> 91&638-2085 <br /> FAX:9161638-8385 <br /> October 8,1990 <br /> Ms.Diane Lundquist <br /> Shell Oil Company <br /> Post Office Bax 4023 <br /> Concord,California 94524 <br /> Subject: Status Report <br /> 520 West Charter Way,Stockton,California <br /> Shell WIC No,204-7514-4305 <br /> Delta Project No.40.88 585 <br /> Dear Ms.Lundquist: <br /> Delta Environmental Consultants, Inc (Delta), has been authorized to conduct a hydrogeologic <br /> investigation which is intended to evaluate the presence or absence of petroleum hydrocarbon <br /> Constituents in soils and ground water beneath and adjacent to the above.referenced site (Figures 1 <br /> and 2). This report summarizes drilling activities,monitoring well installation', es <br /> performed <br /> an March 19 and 28, 1990 Results of ground water samples collected on July 31, 1990, are also <br /> c4niained within this reprnrt. <br /> Also included in this report is a summary of product recovery and interim remedial activities performed <br /> at the site to date and sou�—,e test data. Data in this report supplement information presented in the <br /> Delta report entitled HGroucol <br /> � Work <br /> August dated ' 1999,and <br /> hDelta letter <br /> rep <br /> Ireport entitled Soil and WrInve�rignon, dated March 61490. All fiedprocedures were <br /> conducted using methods described in Enclosure A <br /> Sell Barring Results <br /> On March 19, 1990,two additional soil borings were advanced to 40 feet below grade and completed <br /> as monitoring wells MW-8 and MW-9 (Figure 2). Soil boring 1095 containing soil descriptions are <br /> included in Enclosure B. Monitoring well specifications are included in Enclosure C Selected sail <br /> samples were submitted for chemical analysis of benzene,toluene,ethylbenzene,and xylenes (BMK), <br /> and total petroleum hydrocarbons as gasoline(TPh�. Soil sample analytical results for the March 19, <br /> 1990 drilling event are presented in Table 1. The cerlified analytical reports for soil samples collected <br /> during the March 1990 drilling event are included in Enclosure D. <br /> Practical Sotuluons to Environmental Concerns <br />