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aqua science <br /> 1 - . , engineers fair. <br /> • <br /> 1 November 21, 2001 <br /> 1 Ms Lori Duncan <br /> San Joaquin Public Health Services <br /> Environmental Health Division <br /> 1 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95202 <br /> 1 SUBJECT OCTOBER 2001 REMEDIATION SYSTEM EFFECTIVENESS <br /> REPORT <br /> Frank's One Stop Service Station <br /> 1 2072 West Yosemite Avenue <br /> Manteca, California <br /> 1 Dear Ms Duncan <br /> 1 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 /> 1 groundwater See the ASE "System Installation Report," dated October 2 , <br /> 2000 for complete details regarding the system's installation and start-up <br /> 1 SITE VISITS <br /> 1 During the month of October 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 /> 1 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 OVERVIE <br /> The system was manually turned off by ASE personnel on October 1 1 , <br />' 2001 for the installation of three new canisters to replace the ones <br /> supplied by Barneby Sutcliffe that constantly failed requiring either repair <br /> or replacement The new vessels are designed for higher pressure <br /> applications such that exist at the subject site Due to scheduling <br /> . constraints, materials acquisition, and a clogged canister, the new vessels <br /> Iwere not put back on line until October 19, 2001 The system operated <br /> Frank's One Stop Remediation System Monthly Report — October 2001 <br /> - 1 - <br /> 208 W El Pinfodo, Danville, California 94526 e 925-820-9391 ® Fox 925-837-4853 <br />