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aqua science <br /> • <br /> W� I mow - . engineers inc. <br /> September b, 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 JULY 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 month <br /> of July 2002 <br /> SITE VISITS <br /> During the month of July 2002, ASE generally visited the site for operation a n d <br /> maintenance activities several times each week During the site visits, ASE <br /> noted the date, time, the vacuum influence on each VE well, the air flow into <br /> each of the AS wells, the vacuum flow combined from the VE wells, the IC <br /> engine's operating parameters, and commented on any issues such as system <br /> alarms or shut-offs ASE also performed maintenance procedures as necessary <br /> on all equipment <br /> • <br /> Frank's One Stop Remediation System Monthly Report — July 2002 <br /> - 1 - <br /> 208 W Fl Pintado, Danville, California 94526 o 925 820-9391 o Fax 925-837-4853 <br />