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aqua science <br /> - _ W� r M-F ` I engineers 1ANC <br /> • <br /> December 21, 2001 <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 NOVEMBER 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 November 2001 , ASE generally visited the site for <br /> operation and maintenance activities on Mondays, Wednesdays, a n d <br /> Fridays As detailed on the Groundwater Extraction System Daily Field <br /> Data 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 /> The system was found off, due to power failures on the 16th and the 26th <br /> The system operated continuously the remaining days of the month <br /> Carbon Changeout <br /> A carbon changeout was not required during the month of November <br /> Frank's One Stop Remediation System Monthly Report — November 2001 <br /> - 1 - <br /> 208 W Fl Pintodo, Danville, California 94526 • 925-820-9391 * Fox 925-837-4853 <br />