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RS <br /> F1Ms. Lori Duncan, REHS <br /> Page 5 of 6 <br /> San Joaquin Environmental Health Department <br /> November 15, 2006 <br /> F <br /> Groundwater Monitoring Well Development, Sampling, and Surveying <br /> On August 7, 2006, Stratus Incorporated collected groundwater samples from the newly installed <br /> F groundwater monitoring wells. Groundwater samples were analyzed for GRO, BTEX, and fuel <br /> oxygenates/additives by U.S. EPA Method 8260B. Groundwater analytical data will be presented in the <br /> third quarter groundwater sampling report prepared by Secor Incorporated. As of the date of this report <br /> Fthe new groundwater monitoring wells have not been developed. <br /> O May 2� 20—06_ teral positions and the tops of casing elevations for the wells were surveyed by <br /> M6rrow-Suurrvveying of West Sacramento, California. Survey data are included as Attachment F. <br /> Treatment System Installation and Well Connection <br /> The air injection system is located inside the fenced remediation compound on the north side of the site <br /> in one of the parking stalls. As part of the system installation permits were received from The City of <br /> F, Stockton and the San Joaquin Valley Air Pollution Control District (Attachment G). H2O11 Recovery <br /> Equipment Inc. of Bend, Oregon completed the oxidizer refurbishment and supplied the air sparge <br /> system, The system was delivered to the site on June 14, 2006. <br /> F' URS excavated trenches, laid and connected tubing to the sparge wells and the injection system, and <br /> conducted general system installation. URS began trenching activities on December 16, 2005 and in and <br /> effort to coordinate with construction of the car wash URS suspended installation activities on <br /> , December 19, 2005. URS returned to the site on February 20, 2006 and completed the system <br /> F, <br /> installation on August 25, 2006. The system was started on October 17, 2006 following the collection of <br /> carbon dioxide readings. The treatment system was installed without any changes to the original design <br /> as shown on Figure 3. <br /> F <br /> Soil and Wastewater Disposal <br /> Soil cuttings and wastewater generated during the drilling activities were placed in labeled 55-gallon <br /> DOT-approved steel drums and soil bins and stored on site, pending disposal. A composite soil sample <br /> was collected from the soil cuttings and submitted to the Sequoia Analytical Laboratory in Petaluma, <br /> F California, for analysis of GRO, BTEX, and total lead. Dillard Environmental Services hauled the soil <br /> to the Republic Services Vasco Road landfill in Livermore, California, where it was disposed of as non- <br /> hazardous waste. Stockpiled soil laboratory analytical reports are included in Attachment E. Wastewater <br /> generated during drilling activities was hauled to InStrat, Incorporated, in Davis, California, for <br /> 1 ' disposal. Soil and water disposal documentation is included in Attachment H. <br /> �� All soil excavated during trenching activities was backfilled into the trenches after air tubing was <br /> # " placed. No soil was sent off-site for disposal. <br /> F.1' <br /> F` <br /> KAWprocesAS BP ARC010216812006 System 3nstallation\Report.doc _ <br />