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XC TDecember 13,2016 0 T Page 5 of 8 one on-site soil boring and installing one on-site shallow well, three off-site shallow wells, and three on-site deep wells for the purpose of collecting soil and groundwater samples.The proposed scope of work is described in the following sections. The RWQCB also requested field verification of findings from a 2011 receptor surrey. Results along with tabulation of historical TBA analytical results, a table summarizing well construction details, and a rose diagram of current and historic groundwater flow directions will be included in the Fourth Quarter 2016 Groundwater Monitoring Report. It should be noted that ATC included a groundwater conditions map in the Second Quarter 2016 Groundwater Monitoring Report. Contours could not be added to the map due to the variable gradient. Health and Safety Plan As required by the Occupational Safety and Health Administration (OSHA) Standard "Hazardous Waste Operations and Emergency Response" guidelines (29 CFR 1910.120), and by California Occupational Safety and Health Administration (Cal-OSHA) "Hazardous Waste Operations and Emergency Response" guidelines (CCR Title 8, Section 5192), ATC will prepare a Site-Specific Health and Safety Plan (HASP) prior to the commencement of fieldwork. The Site-Specific HASP will be reviewed and signed by field staff and contractors before beginning field operations at the site. Permitting and Site Access Prior to commencement of off-site drilling activities, ATC will submit access agreements to the owners of the properties north, northeast, and east of the site. Following the execution of the agreements, boring permits will be obtained from the San Joaquin County Environmental Health Department. If required for any boring locations, an encroachment permit will be obtained from the city of Stockton. Underground Utility Locating and Clearance In advance of field activities, ATC will mark the locations of the proposed borings 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 proposed work to be located and contact avoided. ATC will also contract 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 borehole locations will be hand cleared and/or air knifed to a minimum depth of 5 feet bgs. Soil Boring Advancement ATC will contract with a C-57 licensed drilling company to advance one exploratory soil boring in the immediate vicinity of the former oil-water separator using direct push technology (Figure 2). Soil will be collected from the boring for lithologic logging and field screening using a 4-foot by 1.5-inch outside diameter core sampler equipped with an acetate liner. Soil samples will be screened using a photo-ionization detector (PID) and any noticeable staining will be noted. Soil samples for lithological description will be collected at 5-foot intervals to the total depth explored, approximately 20 feet bgs. Soil samples will be screened using a photo-ionization detector(PID) and any noticeable staining will be noted. The soil boring will then be grouted to the surface by emplacing concrete slurry in the bottom of the boring with a tremie pipe. It is estimated that two soil samples will be submitted for laboratory analysis. The samples will be sent under chain-of-custody documentation to a California state certified laboratory and