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Drilling Work Plan <br /> Project No.: 1086 <br /> August 29,2019 <br /> • Four borings will be installed approximately 200 feet northeast of the up-gradient <br /> edge of the former UST pit. The boring will be located between the previously drilled <br /> CPT-3 and CPT-6, which reported elevated concentrations of petroleum <br /> hydrocarbons between 54 and 55 feet bgs; <br /> • Four borings will be installed approximately 300 feet east-northeast of the up- <br /> gradient edge of the former UST pit and beyond the expected down-gradient edge of <br /> the groundwater plume; <br /> • Four borings will be installed approximately 300 feet east of the up-gradient edge of <br /> the former UST pit and beyond the expected edge of the plume. <br /> At each of the four (4) locations the CPT rig will drill one boring to approximately 120 <br /> feet bgs and provide a CPT log. At each of the four locations, a CPT rig will also drill <br /> three (3) discrete boreholes to each aquifer unit and collect a discrete groundwater sample <br /> from the desired depth. Samples will be collected from the middle of the aquifer units. <br /> The depth will be refined based on the initial CPT boring's log. The approximate aquifer <br /> depths are as follows: <br /> — Aquifer Horizon A= 18 to 35 ft bgs <br /> — Aquifer Horizon B =40 to 74 ft bgs <br /> — Aquifer Horizon C = 90 to 115 ft bgs <br /> After sampling, the boreholes will be backfilled to grade with neat cement and capped with <br /> concrete or soil in accordance with SJCEHD requirements. <br /> Schedule &Reporting <br /> Following the completion of the permitting process, Ground Zero will schedule the drilling <br /> work. <br /> The information gathered during this phase of work will be used in preparation of a report of <br /> findings. <br /> The project will be supervised by Dr. Ray Kablanow, the registered professional geologist <br /> responsible for the work. <br /> If you have any questions please do not hesitate to call or email Jenny Weese (209-522-4119 <br /> and jweese @ groundzeroanalysis.com). <br /> Respectfully Submitted, <br /> Raynold I. Kablanow II, Ph.D. <br /> California Professional Geologist#5234 <br /> Certified Hydrogeologist#442 <br /> Attachments: <br /> Drilling Permit,Permit Work Plan&Associated Site Maps, HS&S and QA/QC Reports <br /> Check for Drilling Permit <br />