Laserfiche WebLink
PACIFIC <br /> ENVIRONMENTAL <br /> GROUP INC <br /> NOV 19 AFS 11: 18 <br /> November 8, 1996 <br /> Project 310-040 SA <br /> Mr Bob Boust <br /> Unocal Corporation <br /> 2000 Crow Canyon Place, Suite 400 <br /> San Ramon, California 945833 <br /> Re Remedial Action Performance Summar}•- My throue h September 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 third quarter reporting period of 1996, the soil vapor extraction system <br /> was approximately 71 percent operational System down time was due to vanous <br /> problems with the VR Systems internal combustion engine including a faulty <br /> alternator and a low battery Down time also included propane tank refueling <br /> • Samples taken on August 29, 1996 showed a destruction efficiency of approximately <br /> 91 3 percent, with TPPH-gasoline emissions of 3 3 pounds per day This does not <br /> meet the permit limitation of 95 percent destruction efficiency or less than 2 pounds <br /> per day However, confirmation samples taken on September 6, 1996 show that the <br /> system is in compliance with the San Joaquin Valley Unified Air Pollution Control <br /> District requirements <br /> 2025 Gateway Place, Swte 440, San Jose, California 95110 (408)441-7500 FAX (408) 441-7539 <br />