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CPU!science <br /> AVr <br /> engineers inc. <br /> April 8, 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 MARCH 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 <br /> • the subject site See the ASE "System Installation Report," dated February <br /> 21, 2002 for complete details regarding the AS/VE system's installation <br /> and start-up <br /> This report details the system's operation and performance during the <br /> month of March 2002 <br /> SITE VISITS <br /> During the month of March 2002, ASE generally visited the site f o r <br /> operation and maintenance activities on Mondays, Wednesdays, a n d <br /> Fridays During the site visits, ASE noted the date, time, the vacuum <br /> influence on each VE well, the air flow into each of the AS wells, t h e <br /> vacuum flow combined from the VE wells, the IC engine's operating <br /> parameters, and commented on any issues such as system alarms or shut- <br /> offs ASE also performed maintenance procedures as necessary on all <br /> equipment <br /> Frank's One Stop Remediation System Monthly Report — March 2002 <br /> - 1 - <br /> 208 W E1 Pintado, Danville, California 94526 • 925-820-9391 e Fax 925-837-4853 <br />