SITE INFORMATION AND CORRESPONDENCE_FILE 2

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Jamar Service Page 2 of 3 4075 E. Main Street December 1, 2014 Stockton, CA 95212 • Collecting soil samples at 5-foot intervals, two soil samples from each boring will be submitted for analysis. Soil samples will be submitted to a California State-certified laboratory and analyzed for TPH-g by EPA Method 8015 and BTEX and fuel oxygenates by EPA Method 8260B. • Development of installed groundwater monitoring wells, by purging up to a maximum of 10 casing volumes of water from each well or until the extracted groundwater is clear. A well head survey will be conducted by a licensed surveyor for all newly- installed groundwater wells. • Groundwater samples will be initially collected from the newly-installed groundwater monitoring wells and analyzed for TPH-g by EPA Method 8015 and BTEX and fuel oxygenates by EPA Method 82608. Once groundwater monitor wells are initially sampled, groundwater monitoring wells will continue to be sampled semi-annually during regularly scheduled monitoring events. • Disposal of soil and water generated from well installation and development activities temporarily stored in DOT-approved 55-gallon drums and/or a roll off bin. A licensed disposal contractor will transport the drums to an appropriate disposal or treatment facility. The EHD tentatively approves the WP submitted by ATC, contingent upon successful completion of the following EHD requirements: • All newly-installed groundwater monitoring wells must be sampled and analyzed for constituents of concern quarterly for the first year. Once the quarterly analysis for groundwater monitoring wells have been submitted to EHD and reviewed, continue to sample the wells semi-annually until further notice from EHD. • Notify EHD a minimum of five working days for all field work activities. • Submit a completed San Joaquin County Well and Boring Permit Application form that describes the construction of the wells as outlined in the work plan along with a site map showing the locations of all wells approved to be constructed. .A completed and signed Master File Record form that indicates who the billing party will be. In addition, a copy of an encroachment permit issued by the City of Stockton and/or an access agreement with private property owners for all off-site borings and groundwater monitoring wells locations. A permit fee for CPT Borings per parcel is $130, along with a $390 Inspection Activity fee per parcel. Once the permit has been issued, the EHD requires at least five working days notification for scheduling the inspection appointments. • All CPT soil borings and groundwater sample borings are required to be grouted from the total depth to surface grade with neat cement. • All investigation derived waste (IDW); including soil cuttings, groundwater, and water generated from well destruction activities, shall be properly containerized, labeled, stored and disposed. A signed manifest from the receiving facility for the disposal of the IDW must be submitted to EHD.