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aqua science <br /> AW <br /> !- I , - engineers # r. <br /> MWt 1 "7 <br /> May 23, 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 APRIL 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 ASNE system's installation <br /> and start-up <br /> This report details the system's operation and performance during the <br /> month of April 2002 <br /> SITE VISITS <br /> During the month of April 2002, ASE generally visited the site f o r <br /> 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, <br /> the air flow into each of the AS wells, the vacuum flow combined from the <br /> VE wells, the IC engine's operating parameters, and commented on any <br /> issues such as system alarms or shut-offs ASE also performed <br /> maintenance procedures as necessary on all equipment <br /> Frank's One Stop Remediation System Monthly Report — April 2002 <br /> - ! - <br /> 208 W Fl Pintado, Danville, California 94526 0 925-820-9391 o Fax 925-8374853 <br />