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ATC Associates Inc. 1117 Lone Palm Avenue,Suite B Modesto,California 95351 209-579-2221 Fax:209-579-2225 encapsulated 03, created by forcing an air/03 mixture through fine-pore ozone diffusers, otherwise known as Spargepoints®, into soil or groundwater. Figure 2 shows the remediation system compound location as well as the injection and groundwater monitoring well network for the site. Five injection wells (IWI through IW5) at the site consist of two Spargepoints® positioned within an eight-inch diameter boring. Injection wells IW6 and IW7 are both of single completion construction. Table 1 includes a summary of the injection well completion details. Each Spargepoine consists of a 30" long, 1-inch diameter fine-pore ozone diffuser coupled to its own blank, 1/4-inch inside diameter casing,which extends to the surface. The injection of 03 into individual Spargepoints® occurs at separate, pre-programmed injection intervals. During the reporting period associated with the first quarter of 2012 (from December 20, 2011 to April 5, 2012), 03 was injected sequentially in IWI(s), IWI(d), IW2(s), IW2(d), IW3(s), IW3(d), IW6, and IW7. The ozone injection times per cycle consisted of 5 minutes each for IW 1(d)and IW2(d); 10 minutes each for IWI(s), IW2(s), IW3(s), and IW3(d); and 15 minutes each for IW6 and IW7. Consequently, ozone was injected into the subsurface for 80 minutes followed by a 10 minute shut-off period before the cycle repeated. The ozone injection system shut down sometime between December 20, 2011,and January 9, 2012, due to an air compressor failure. Following repairs to the air compressor on January 9, 2012,the system was restarted and operated continuously from January 9 through April 5, 2012 for approximately 1,828 hours. Due to a theft at the project site, a complete copy of the operational data for this time period is not available. Available field data are included in Attachment 1. Vadose Zone Remediation Startup of the SVE system and initial vapor sampling was conducted on October 17, 2011. During the startup of the vapor extraction system, flow rate readings were at 152 cubic feet per minute (cfm) and temperature was registering between 1,092 and 1,631°F. After initial monitoring with a photoionization detector (PID) of VWl through VW3, the valve for VWI was left fully open and the valves for VW2 and VW3 remained one half open. Vapor samples collected on October 17, 2011, were submitted to State-certified laboratory Test America, Inc. with appropriate chain-of-custody documentation. The lab is certified under an Environmental Laboratories Accreditation Program. Chemical analyses of total petroleum hydrocarbons as gasoline (TPHg) and benzene, toluene, ethylbenzene and xylenes (BTEX) was performed utilizing Method TO-15. TPHg and BTEX were detected the influent sample and BTEX were detected in the effluent sample. Analytical results for the influent sample detected TPHg vapors at a concentration of 910 parts per million by volume (ppmv). TPHg results for the effluent were reported below a detection limit of 7.2 ppmv. Laboratory results of the effluent and influent vapor samples indicate a destruction efficiency of greater than 95%.Utilizing concentration and flowrate,the emission rate was calculated at an average of 0.35 pounds per day. Analytical results and the destruction efficiencies for each detected analyte are Jamar Status Rpt 1 Q 2012 4