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New Well Installations Seven new AS and three new SVE wells will be installed as part of the AS/SVE system. Drilling and installation of the wells will be performed as previously described. The AS wells will be 2-inch- diameter, and the SVE wells will be 4-inch-diameter. The AS wells have been designed to be screened to remediate the impacted finer-grained soils between 45 and 55 feet. However, the SVE wells will be installed through the vadose zone and into the upper portion of the saturated sediments thus inducing air contact with these materials. Each of the AS wells and each of the SVE wells will be separately plumbed via subsurface piping to a manifold situated within the system compound area. The manifolds will be constructed with flow control valves, flow meters, sample ports and vacuum or pressure gauges as necessary to independently control flow and monitor each injection or extraction well. The AS and SVE manifold jand well construction details are shown on Figure 5 and 6,respectively. General Requirements A Permit to Construct shall be obtained from the San Joaquin Valley Air Pollution Control District prior to installation of the remediation equipment. A Permit to Operate shall be obtained after system installation, startup and confirmation that the system is working in accordance with permit requirements. In addition, a City of Stockton Building and San Joaquin County Building Department i permit will be procured (if necessary) for construction of the system. A new remediation compound will be constructed adjacent to the two ASTs and fueling island, and just south of the B Street entrance to the Site as shown on Figure 8. The existing asphalt surface is expected to provide adequate support for the remediation equipment. Underground piping will be used to connect each individual AS and SVE well to their respective AS and SVE manifolds situated within the remediation compound. The remediation compound will be secured with security-slatted chain link fence and protected from vehicular traffic with bollards placed at approximate 4-foot centers. The manifolds will be constructed such that adequate maneuverable space is provided for within the compound. Electrical systems and supplies shall be connected to conform to local and state requirements. An electrical panel will be enclosed within the remediation compound. The equipment shall be intrinsically safe, manufactured for use in a potentially hazardous location, and meet the requisite codes for building, electrical and fire inspection. Remediation System Details AS Blower The AS compressor will be a Ingersoll-Rand rotary screw compressor (28 scfm) with a 7.5-HP, 230 volts (V), three-phase motor, or an equivalent compressor. SVE Blower The SVE blower will be a King Buck Model MMC-5A, trailer-mounted catalytic oxidizer (100 scfm) with a 5-HP, 230V, three-phase motor, or an equivalent blower. Stockton Maintenance Station,Task Order No.05 Caltrans Contract No.06A1141,EA 10-ON8300 Project No.S9200-06-05A -7- December 28,2010