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3939 Cimbredge Road <br /> SUIte 120 <br /> Cameion Park, CA 956819007 <br /> Tel 530 676 6884 <br /> • <br /> I'ax 530 676 6885 <br /> 40he <br /> (tl2roup <br /> September 21, 1999 <br /> Project 791612 <br /> Mr Paul Supple <br /> ARCO Products Company <br /> P 0 Box 6549 <br /> Moraga, California 94570 <br /> Re Quarterly Groundwater Monitoring Report, Second Quarter 1999, for ARCO Service <br /> Station No 2130, Located at 7906 North El Dorado Street, Stockton, California <br /> Dear Mr Supple <br /> Pinnacle Environmental Solutions, a member of The IT Group (Pinnacle), is submitting the <br /> attached report which presents the results of the second quarter 1999 groundwater monitoring <br /> and sampling program at ARCO Products Company (ARCO) Service Station No 2130, located <br /> at 7906 North El Dorado Street, Stockton, California In addition, operation and performance <br /> • details of the remediation system are presented The quarterly monitoring program is in <br /> compliance with the San Joaquin County Public Health Services requirements regarding <br /> underground storage tank investigations The performance of the remediation system is in <br /> compliance with the San Joaquin Valley Unified Air Pollution Control District (SJVUAPCD) <br /> permit requirements <br /> LIMITATIONS <br /> No monitoring event is thorough enough to describe all geologic and hydrogeologic conditions of <br /> interest at a given site If conditions have not been identified during the monitoring event, such a <br /> finding should not, therefore, be construed as a guarantee of the absence of such conditions at the <br /> site, but rather as the result of the scope, limitations, and cost of work performed during the <br /> monitoring event <br /> Please call if you have questions <br /> Sincerely, <br /> Pinnacle <br /> JM Coffman Mark Capps, R G 6561 <br /> Project Manager Project Geologist <br /> CP1C\Archn+eWco\21301QtrIy12130Q299 DOC-99\1sg 1 <br /> r <br /> i 9 <br />