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aqua science <br /> Mir V• <br /> !=r� I, - I engineers inc. <br /> September 19, 2001 <br /> Ms Dot Lofstrom <br /> San Joaquin Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95202 <br /> SUBJECT AUGUST 2001 REMEDIATION SYSTEM EFFECTIVENESS <br /> REPORT <br /> Frank's One Stop Service Station <br /> 2072 West Yosemite Avenue <br /> Manteca, California <br /> Dear Ms Lofstrom <br /> On September 29, 2000, Aqua Science Engineers, Inc (ASE) started an <br /> interim groundwater remediation system at the subject site to control the <br /> off-site migration of petroleum hydrocarbons identified in the on-site <br /> • groundwater See the ASE "System Installation Report," dated October 2 , <br /> 2000 for complete details regarding the system's installation and start-up <br /> SITE VISITS <br /> During the month of August 2001, ASE generally visited the site for <br /> operation and maintenance activities on Mondays, Wednesdays, and <br /> Fridays As detailed on the Groundwater Extraction System Daily Field <br /> Data Log (attached in Appendix A), ASE noted the date, time, total gallons <br /> treated, the vacuum influence on each recovery well, and commented on <br /> any issues such as system alarms or shut-offs ASE also performed <br /> maintenance procedures as necessary on all equipment <br /> SYSTEM OPERATION OVERYTE <br /> The system was found to be off twice during the month, once in t h e <br /> fourth week due to a power failure, and once in the fifth week due to a <br /> malfunctioning manifold in GAC vessel #1 The system operated <br /> continuously the remaining days of the month <br /> • <br /> Frank's One Stop Remediation System Monthly Report — August 2001 <br /> - I - <br /> 208 W El Pintado, Danville, California 94526 o 925820-9391 o Fax 925837-4853 <br />