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I <br />_9effler — ryan inc. � 0 4 - 75.2-4 - 6 56 5 <br />May 14, 1991 <br />it CompanyPost 23 <br />Concord, California <br />Attention: Lisa Waters <br />Reference: Shell Service Station <br />2575 Country Club @ Plymouth <br />Stockton, California <br />Gentlemen: <br />L t� <br />M AY 2 1 1,0 01 <br />ENVIRONMENTAL 1--fl-ALTH <br />PERMIT/ SERVICES <br />On May 1, 1991 Gettler-Ryan Inc. field technicians certified the monitoring equipment at <br />the referenced location. At the time of the inspection, all of the monitoring equipment <br />except for the waste oil was found to be fully functional, operating correctly, and <br />calibrated. After repairs were made to the waste oil monitoring equipment the system was <br />completely operational. <br />Please find the corresponding survey and inspection sheets enclosed. <br />Please call me if you should have any questions or comments. <br />Timothy J. Dahl <br />Enclosures <br />2150 west winton avenue 9 h a Yward, ca I if ornia 94545-1210 * (415) 783-7500 <br />