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MPD$-UN5098-02 <br /> May 3 , 1994 <br /> Page 2 <br /> transported the purged ground water to the Unocal Refinery located <br /> in Rodeo, California, for treatment and discharge to San Pablo Bay <br /> under NPDES permit <br /> ANALYTICAL RESULTS <br /> The ground water samples collected from the Unocal wells were <br /> analyzed at Sequoia Analytical Laboratory and were accompanied by <br /> properly executed Chain of Custody documentation. The analytical <br /> results of the ground water samples collected from the Unocal wells <br /> to date are summarized in Table 3 The concentrations of Total <br /> Petroleum Hydrocarbons (TPH) as gasoline and benzene detected in <br /> the ground water samples collected from the Unocal wells this <br /> quarter are shown on the attached Figure 2 Copies of the <br /> laboratory analytical results and the Chain of Custody documenta- <br /> tion for the Unocal wells are attached to this report <br /> DISTRIBUTION <br /> A copy of this report should be sent to the San Joaquin County <br /> Public Health Services, and to the Regional Water Quality Control <br /> Board, Central Valley Region <br /> If you have any questions regarding this report, please do not <br /> hesitate to call at (510) 602-5120 <br /> Sincerely, <br /> MPDS Services, Inc <br /> Na EEG 1633Comm4 <br /> Joel G Greger, C E G <br /> Senior Engineering Geologist <br /> License No EG 1633 CAL <br /> Exp Date 6/30/94 <br /> /dlh <br /> Attachments . Tables 1 through 4 <br /> Location Map <br /> Figures I & 2 <br /> Laboratory Analyses <br /> Chain of Custody documentation <br /> cc Mr Thomas J Berkins, Kaprealian Engineering, Inc <br />