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PACIFIC rl; ;fl - <br /> ENVIRONMENTAL ` -� P4� A!-]11 <br /> '> <br /> GROUP INCA SEP 12 -- <br /> � 52 <br /> September 10, 1996 <br /> Project 310-040 5A <br /> Mr Bob Boust <br /> Unocal Corporation <br /> 2000 Crow Canyon Place, Suite 400 <br /> San Ramon, California 94583 <br /> Re Remedial Action Performance Summary-April through June 1996 <br /> Unocal Service Station 2859 <br /> 1665 Pacific Avenue <br /> Stockton, California <br /> Dear Mr Boust <br /> This letter presents a remedial action performance summary for the site referenced <br /> above Attachment A presents a system performance summary which includes key <br /> operating parameters Certified analytical reports with chain-of-custody documentation <br /> are included as Attachment B, and field data sheets are presented as Attachment C The <br /> status of recent remedial activities is presented below <br /> Remedial Performance Evaluation <br /> During the second quarter reporting period of 1996, the soil vapor extraction system was <br /> approximately 70 percent operational System down time was due to carburetor <br /> problems with the VR Systems internal combustion engine <br /> 2025 Gateway Place, Suite 440, San Jose, California 95110 (408)441-7500 FAX (408)441-7539 <br />