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AV is ■ / 1 V �`--- Planning and Permits Prior to commencement of off-site drilling activities, Atlas will obtain an encroachment permit from the City of Stockton. Atlas will also submit a boring permit application to the San Joaquin County Environmental Health Department (SJCEHD) for the advancement of the CPT boring and hydropunch and soil vapor points. Underground Utility Locating and Clearance In advance offield activities, Atlas will markthe locations ofthe proposed boring and vapor point locations in accordance with the Underground Service Alert (USA) guidelines, and notify USA of upcoming subsurface activities in order for existing underground utilities in the area of the proposed work to be located so as to avoid contact with the utilities. Atlas will also contract with a private utility locator to confirm the locations of underground utilities in the vicinity of the drilling locations. Prior to use of drilling equipment, the off-site boring locations will be hand cleared and/or air knifed to a minimum depth of 5 feet bgs. Boring Advancement Atlas will contract with a C-57 licensed drilling company to advance one pair of CPT boring and hydropunch boring to approximately 110 feet bgs to collect up to two groundwater samples between 60 and 110 feet bgs. The borings will be advanced at one location along Park Street on the block northeast of monitoring well MW12. Proposed boring locations are shown on Figure 2. Groundwater samples will be collected from the borehole using a modified HydroPunch° sampler. Prior to groundwater sampling, a water level meter will be used to confirm that the drive rods do not contain water. The sampler will then be driven to approximately three to four feet below the desired sampling depth, and retracted three or four feet, respectively, to expose the disposable Schedule 20 polyvinyl chloride (PVC) screen and allow for groundwater to enter the HydroPunch° sampler. The water sample will be collected by lowering a %/ inch diameter stainless steel bailer through the drive rods to groundwater. The groundwater will be bailed from the drive rods and decanted from the bailer into 40 - milliliter (ml) volatile organic analysis (VOA) vials. Following the collection of the sample, the drive rods will be retracted, leaving the disposable drive tip and four -foot length of PVC well screen in the hole. Following completion, the borings will be grouted through the drive rods from the total depth explored to surface grade with neat cement. Atlas anticipates that two groundwater samples will be collected from the boring at screened intervals between 65 and 110 feet bgs. Actual sample depths will be determined by lithology encountered during field activities. Following groundwater sample collection, the borings will be backfilled with neat cement grout to the ground surface. Drill cuttings, if any, will be stored on-site in 55 -gallon containers pending laboratory results, after which disposal arrangements will be made. Laboratory Analyses Groundwater samples collected will be submitted for chemical analysis under chain -of -custody documentation to a California state certified laboratory. Samples will be analyzed for TPHg, BTEX, and fuel oxygenates, including MTBE and TBA using EPA Method 8260B. 5�Page