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aqua science <br /> AW <br /> R mr-M I MET � I <br /> _ _ <br /> engineers Inc. <br /> September 30, 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 AUGUST & SEPTEMBER 2002 REMEDIATION SYSTEM <br /> OPERATION AND MAINTENANCE REPORT <br /> Frank's One Stop Service Station <br /> 2072 West Yosemite Avenue <br /> Manteca, California <br /> Dear Ms Duncan <br /> On December 21, 2001, ASE began operation of an air-sparging/vapor- <br /> extraction (AS/VE) remediation system to remediate elevated petroleum <br /> . hydrocarbon concentrations identified in groundwater and soil beneath the <br /> subject site See the ASE "System Installation Report," dated February 21, 2002 <br /> for complete details regarding the AS/VE system's installation and start-up <br /> This report details the system's operation and performance during the months <br /> of August & September 2002 <br /> SITE VISITS <br /> During the months of August & September 2002, ASE generally visited the site <br /> for operation and maintenance activities several times each week During the <br /> site visits, ASE noted the date, time, the vacuum influence on each VE well, t h e <br /> air flow into each of the AS wells, the vacuum flow combined from the VE <br /> wells, the IC engine's operating parameters, and commented on any issues <br /> such as system alarms or shut-offs ASE also performed maintenance <br /> procedures as necessary on all equipment <br /> Frank's One Stop Remediation System Monthly Report — August & September 2002 <br /> - 1 - <br /> 208 W EI Pintado, Danville, Califomio 94526 0 925-820-9391 e Fax 925 837-4853 <br />