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' 4 <br /> aqua science <br /> a mr� I MMY low I• <br /> engineers inc. <br /> fJanuary 22, 2002 <br /> Ms Lori Duncan <br />' San Joaquin Public Health Services <br /> Environmental Health Division <br />' 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95202 <br />' SUBJECT DECEMBER 2001 REMEDIATION SYSTEM EFFECTIVENESS <br /> REPORT <br /> Frank's One Stop Service Station <br />' 2072 West Yosemite Avenue <br /> Manteca, California <br />' Dear Ms Duncan <br />' On September 29, 2000, Aqua Science Engineers, Inc (ASE) started an <br /> interim groundwater remediation system at the subject site to control the <br /> off-site migration of petroleum hydrocarbons identified in the on-site <br />�. groundwater See the ASE "System Installation Report," dated October 2, <br /> 2000 for complete details regarding the system's installation and start-up <br /> SITE VISITS <br /> During the month of December 2001, ASE generally visited the site for <br /> operation and maintenance activities on Mondays, Wednesdays, and <br /> Fridays As detailed on the Groundwater Extraction System Daily Field <br /> IData Log (attached in Appendix A), ASE noted the date, time, total gallons <br /> treated, the vacuum influence on each recovery well, and commented on <br /> any issues such as system alarms or shut-offs ASE also performed <br /> maintenance procedures as necessary on all equipment <br /> ISYSTEM OPERATION OVERVIEW <br /> The system was found off, due to power failures on the 4th and the 10th <br /> The system was turned off by ASE personnel on December 21, 2001 due t o <br /> personnel and scheduling constraints in respect to the holidays <br /> A carbon changeout was not required during the month of December <br /> Frank's One Stop Remediation System Monthly Report — December 2001 <br /> I1 <br /> 208 W El Pintodo, Danville, California 94526 • 925-820-9391 • Fax 925-837-4853 <br />