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ATC Associates Inc. 1117 Lone Palm Avenue,Suite B Modesto,California 95351 209-579-2221 Fax:209-579-2225 collected and analyzed. Site activities were summarized in JPCA's 2nd Phase II Environmental Assessment Report, dated October 25, 2000. In January 2003, GHH Engineering, Inc. (GHH) advanced three cone penetration test (CPT) and three hollow stem auger soil borings to depths ranging from 104 feet bgs to 122 feet bgs. In May 2003, GHH advanced borings MW6a, MW6b, MW7a, and MW7b to the east of the site. These borings were completed as monitoring well clusters with MW6a and MW7a advanced to a depth of approximately 75 feet bgs, and MW6b and MW7b advanced to a depth of approximately 94 feet bgs. GHH also installed well EW 1 in the southeast portion of the site. Site activities were summarized in GHH's Second Quarter 2003 Groundwater Monitoring Report and Additional Assessment Report, dated June 2003. In January 2004, ATC supervised the installation of five nested ozone injection wells (IW1 - IW5) and the associated C-SpargeTM ozone remediation system. Each nested injection well, shallow and deep, was fitted with a Spargepoint® at a depth of approximately 74.0 feet bgs and 107.7 feet bgs, respectively. Each Spargepoint® consisted of a 30 inch long by 1-inch outside diameter(OD) diffusion apparatus. Each injection well was completed to the surface using Schedule 80 poly-vinyl chloride (PVC) piping. The soil boring for each nested well was completed at approximately 111.50 feet bgs. The C-SpargeTM remediation system consisted of a KVA C-SpargeTM System Series model 5030. This included a small profile Master Unit (43-inch wide by 29.5-inch tall by 12-inches deep), which has a capacity of serving up to twelve(12) Spargepoints®sequentially. From February 17 to April 20, 2004, an ATC geologist supervised the installation of groundwater monitoring wells MW6c, MW7c,MW8,MW9a,MW9b,MW9c,MW 10a,MW 10b,and MW 10c. The on-site C-SpargeTM ozone remediation system, installed during May and June 2004, was activated on June 17, 2004. Figure 2 depicts the location of the injection and groundwater monitoring well network for the Jamar property. There was a parameter change to the C-SpargeTM system in August 28, 2006, for system optimization. The system was taken offline on December 27, 2006, to trench and install ozone replacement lines. With the completion of the trenching and repair of broken lines, the system was brought back online on December 19, 2007. Between May 28 and 30, 2008, ATC supervised the installation of vapor extraction wells VEWI, VEW2, and VEW3 to depths of approximately 50 feet bgs. Each well was constructed using approximately 15 feet of 0.010-inch slotted, 2-inch diameter, Schedule 40 PVC screen from approximately 35 to 50 feet bgs. During July 2008, one long term and two short term vapor extraction pilot tests (VETS) were performed at the site in an effort to evaluate the feasibility of SVE as a remedial option at the site. During the long term VET, a vacuum was applied to VEW 1 for approximately 8 hours. During the first short term VET, Jamar Status Rpt IQ 2012 2