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4 <br /> MPDS-UN5098-12 <br /> M October 16, 1996 <br /> Page 2 <br /> in Table 2 The concentrations of Total Petroleum Hydrocarbons (TPH) as gasoline and benzene <br /> detected in the ground water samples collected from the Unocal wells this quarter are shown on the <br /> attached Figure 2 Copies of the laboratory analytical results and the Chain of Custody documentation <br /> for the Unocal wells are attached to this report <br /> LIMITATIONS <br /> Environmental changes, either naturally-occurring or artificially-induced, may cause changes in ground <br /> water levels and flow paths, thereby changing the extent and concentration of any contaminants <br /> DISTRIBUTION <br /> A copy of this report should be sent to the San Joaquin County Public Health Services, to the Regional <br /> Water Quality Control Board, Central Valley Region, and to Mr Frank Muramoto of Environmental <br /> Audit, Inc <br /> If you have any questions regarding this report, please do not hesitate to call Mr Joel G Greger at <br /> (510) 602-5120 <br /> Sincerely, <br /> MPDS Services, Inc <br /> GFQI <br /> 0 <br /> Haig (Gary) Tejirian � X. <br /> Senior Staff Geologist `1 Jars G GRE ER <br /> No EG 1633 <br /> d CERTIFIED <br /> NxINEErING <br /> GEOLOGIST a. <br /> Joel G Greger, C E G <br /> 0'F <br /> Senior Engineering Geologist <br /> License No EG 1633 <br /> Exp Date 8/31/98 <br /> Attachments Tables 1, 2 & 3 <br /> Location Map <br /> Figures 1 & 2 <br />• Laboratory Analyses <br /> Chain of Custody documentation <br /> Purging/Sampling Data Sheets <br /> cc Mr Mark W Boyd, Kaprealian Engineering, Inc <br />