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aqua science <br /> Mr <br /> I �= . , -- . engineers inc. <br /> • <br /> March 27, 2002 <br /> Ms Lori Duncan <br /> San Joaquin Public Health Services <br /> Environmental Health Division <br /> I 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95202 <br /> SUBJECT FEBRUARY 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 September 29, 2000, Aqua Science Engineers, Inc (ASE) started an <br /> interim groundwater pump and treat (P&T) remediation system at the <br /> subject site to control the off-site migration of petroleum hydrocarbons <br /> aidentified in the on-site groundwater See the ASE "System Installation <br /> Report," dated October 2, 2000 for complete details regarding the P&T <br /> system's installation and start-up On December 21, 2001, ASE began <br /> Ioperation of an air-sparging/vapor-extraction (AS/VE) remediation <br /> system to remediate elevated petroleum hydrocarbon concentrations <br /> identified in groundwater and soil beneath the subject site See the ASE <br /> "System Installation Report," dated February 21, 2002 for complete details <br /> regarding the AS/VE system's installation and start-up <br /> IThis report details the system's operation and performance during the <br /> month of February 2002 <br /> SITE VISITS <br />' During the month of February 2002, ASE generally visited the site for <br /> operation and maintenance activities on Mondays, Wednesdays, and <br /> Fridays During the site visits, ASE noted the date, time, total gallons <br /> treated by the P&T system, the vacuum influence on each groundwater <br />' recovery well, vacuum influence on each VE well, the air flow into each of <br /> the AS wells, the vacuum flow combined from the VE wells, the IC engine's <br /> . operating parameters, and commented on any issues such as system <br /> I <br /> Frank's One Stop Remediation System's Monthly Report — February 2002 <br />' 1 <br /> 208 W F1 Pinlada, Danville, California 94526 925-820-9391 • Fax 925-$37-x$53 <br />