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---Waqua science <br /> ALI. � I ,AW -* I engineers Enc. <br /> October 25, 2001 <br /> I 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 /> I SUBJECT SEPTEMBER 2401 REMEDIATION SYSTEM EFFECTIVENESS <br /> REPORT <br /> Frank's One Stop Service Station <br />' 2072 West Yosemite Avenue <br /> Manteca, California <br /> IDear 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 "Systern Installation Report." dated October 2 , <br /> 2000 for complete details regarding the system's installation and start-up <br /> SITE VIS11S <br /> I During the month of September 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 /> I 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 /> SYSTEM OPERATION OVERVIEW <br /> The system was found to be off once in the month, during the last week, <br /> due to a power failure GAC canister #1 was taken off-line in the second <br /> week of the month due to a leak that could not be repaired The system <br /> operated continuously the remaining days of the month <br /> I <br /> Frank's One Stop Remediation System Monthly Report — September 2001 <br />' - 1 - <br /> 208 W El Pintado, Danville, Calrfamia 94526 e 925820-9391 o Fax 9258374853 <br />