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Teflon"" paper and plastic endcaps. All samples will be immediately labeled, logged onto chain- <br /> of-custody forms and place in a chilled ice chest for delivery to the laboratory for analysis. <br /> The boreholes will be logged using the Unified Soil Classification System under the supervision <br /> of a registered geologist using the attached Wright Sampling Protocol. The samples will be <br /> collected at minimum five-foot intervals or continuously as desired, at intervals of obvious <br /> contamination and at stratigraphic features of interest. Additional lithologic information will <br /> be collected to describe the subsurface geology at the discretion of the supervising geologist. <br /> Selected samples may be field tested using the Hanby"" Field Colorimetric Test, a semi- <br /> quantitative field laboratory test for presence of hydrocarbons. These tests provide rapid <br /> reconnaissance data on estimated hydrocarbon concentration present in soil and groundwater. <br /> The ultimate boring depths are estimated to be 10 to 20 feet. Upon completion of drilling and <br /> sampling, the boreholes will be backfilled with cement grout. <br /> Chemical Analysis of Reconnaissance Soil and Water Samples <br /> Up to 10 soil samples and 10 groundwater samples will be submitted and analyzed for the <br /> following: <br /> *Total Petroleum Hydrocarbons as Gasoline (TPHG) by method 8015 <br /> *Benzene, Toluene, Ethylbenzene, and Xylene (BTEX) by method 8020/602 <br /> Monitoring Well Construction <br /> Borings for the monitoring wells will be installed by the use of a truck mounted hollow stem <br /> auger. Monitoring wells will be constructed using precleaned, threaded Sch. 40 PVC well <br /> casing, screening the entire thickness of the aquifer, and a portion above the capillary fringe to <br /> allow observation for possible floating product. Glues will not be used to construct well casing. <br /> Final well design and placement will depend upon subsurface conditions encountered. The <br /> annulus between the casing and the borehole will be backfilled with 2/12 sand to about two feet <br /> above the screens. A bentonite clay spacer about two feet thick will be placed above the sand <br /> pack, and cement grout will be pumped from above the bentonite to the surface using a tremie <br /> pipe. A traffic rated access vault box with locking device will cap the well. Casings will be <br /> measured for elevation to a known reference datum. The wells will be developed to remove the <br /> drilling muck, grade the sand pack and provide a more complete hydraulic connection to the <br /> aquifer. The well volume will be calculated and a number of those volumes will be removed <br /> until the water becomes clear and the amount of sand pumped is minimal. The well will be <br /> allowed to recover prior to sampling. A log of the development will be kept for the well. Newly <br /> constructed wells will be surveyed to a known reference. <br /> Longterm Groundwater Monitoring <br /> Groundwater samples will continue to be collected from existing and any newly constructed <br /> wells on or off-site on a quarterly basis. Each monitoring well will be purged using calculated <br /> well volumes based upon the depth to water in each casing. Depth to groundwater measurements <br /> Mr. Ed's Muffler Workplan (Cox and Cox) <br /> Page 3 <br />