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Eastside Winery • • <br /> Lodi, San Joaquin Co. <br /> Monitoring Well Installation Proposal <br /> Equipment decontamination <br /> The monitoring wells will be drilled with 10-inch hollow-flight augers. The augers will <br /> be brought to the site in a steam-cleaned condition. The augers will be steam-cleaned <br /> after drilling the first well in preparation for drilling the second well. <br /> Health and Safety Pian <br /> Upon arrival at the site,each member of the drilling team will be given a local map on <br /> which the route to Lodi Memorial Hospital is clearly marked. The route will also be <br /> described verbally to each person. A cell phone will be present at the drilling site for the <br /> duration of activities there. <br /> B. Drilling Details <br /> Hollow-flight augers(nominal 10"OD, 4 7/8"ID)will be used to drill. Logging will be <br /> accomplished from continuous cores taken through the interior of the augers. The <br /> expected total depth is 25 to 30 feet. <br /> C. Monitoring Well Design <br /> The proposed design of the wells is shown on Figure 2. The sand pack and screen size <br /> will be as shown on the figure(0.020" slots,Number 3 sand)if the water-bearing stratum <br /> targeted is medium sand or coarser. If the screen needs to be placed in fine or silty sand, <br /> 0.010" slots will be used. <br /> D. Well Development <br /> The wells will be developed by alternately swabbing and pumping with a 0.5 hp <br /> submersible pump. The procedure will continue until the turbidity of water delivered by <br /> the pump after three casing-volumes have been purged is less than 5 NTU. The <br /> development water will be placed in the adjacent infiltration area. <br /> E. Surveying <br /> A licensed land surveyor will be hired to measure the elevations of the tops of the plastic <br /> casings and to locate them(to within 1 foot)on a rational coordinate system. <br /> G. Well Sampling <br /> The wells will be sampled for the first time at least 48 hours after completing the <br /> development. The wells will be purged of 3 casing volumes using a 24 volt submersible <br /> pump. The purge water will continuously pass through a measuring cell and the pH,EC, <br /> and Temperature will be recorded at intervals. The pump carries a disposable <br /> polyethylene bailer ahead of the pump intake and the contents of the bailer are used as the <br /> sample. The portion of the sample used for VOC analyses will be removed from the <br /> bailer using the VOC subsampler provided by the bailer manufacturer. All subsamples <br /> will be placed in appropriate containers in the field and labeled and then stored in an ice <br /> chest pending immediate delivery to a laboratory in Sacramento. A duplicate sample will <br /> be taken from one of the wells on two occasions per year. It will be presented to the <br /> laboratory as an independent sample from a different source. <br /> 2 <br />