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November 26, 2018 <br /> Former Shell Service Station <br /> 434 Dr. Martin Luther King Jr Blvd., Stockton <br /> Page 2 <br /> store/mini market, respectively. To the east of the Site, across California Street, there is a taco truck stand, a <br /> barber shop, and a law office building. South of the Site is a vacant lot and residential buildings. To the west <br /> of the Site, across a residential alley, there is a Domino's Pizza Restaurant and residential buildings. <br /> PROPOSED SCOPE OF WORK <br /> In order to delineate the lateral extent of impacted groundwater, WPI has proposed to install two groundwater <br /> monitoring wells to the west and south of well MW-3. During the Third Quarter 2018 groundwater sampling <br /> event, the depth to groundwater in wells MW-1, MW-2, and MW-3 was approximately 21 feet; therefore, the <br /> proposed wells will be screened from 15 to 30 feet. <br /> Pre-field activities will include the following: <br /> • Updating the existing WPI SSHP, as necessary; <br /> • Scheduling subcontractors; <br /> • Obtaining necessary permits; and <br /> • Notifying Underground Service Alert at least one week prior to commencement of work to perform an <br /> underground utility clearance for the planned drilling location. <br /> Prior to any excavation,a utility line survey will be performed to locate all underground utility lines at the site. <br /> All boring locations will be air-knifed to a depth of five feet and to a width three inches larger that the width <br /> of the lead drilling auger. Details of the soil sampling depths and procedures and estimated well installation <br /> are in Tables 1 and 2 below. <br /> Table 1, Soil Sampling Procedures <br /> Number of Depth of Drilling Sample Sample Method Sample Analysis <br /> Borings Boring Method Interval <br /> feet feet <br /> 2 30 Hollow stem 5-30 Modified California TPPH,BTEX,oxygenates,full scan <br /> auger split spoon sampler VOCs by EPA 8260B;preserved by <br /> EPA 5035 for VOCs. <br /> Table 2, Estimated Well Construction Data <br /> Number Type of Depth Casing Material Screen Filter Pack Well Seal Intervals <br /> of Wells Well of Well Interval Interval (feet) <br /> (feet) (feet) (feet) Bentonite Neat <br /> Chis Cement <br /> 2 Groundwater 30 Blank:2-inch diameter, 15-30 13-30 10-13 1-10 <br /> monitoring schedule 40 PVC <br /> Slotted Casing:4-inch <br /> diameter,schedule 40 PVC <br /> with factory milled 0.020-inch <br /> slots <br />