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Ms.Margaret Lagorio,SJCEHD October 21,2003 <br /> Joe's Truck Plaza Project No. 2033-15600-01 <br /> Work Plan for Additional Site Assessment <br /> Page 10 <br /> ozone, will be installed on all threaded well casing joints. A filter pack of LonestarTM <br /> #2/20 sand will be placed around the sparge point from the base of the boring to <br /> approximately 1 foot above the top of the sparge point. Approximately 2 feet of <br /> bentonite will be placed on top of the filter pack to provide a sanitary seal for the well. <br /> The boring will be subsequently backfilled with neat cement up to surface grade. The <br /> tops of the well casings will be fitted with the appropriate hardware which will allow the <br /> ozone conveyance piping to be attached. <br /> Surveying <br /> The elevations of each newly installed groundwater monitoring well and exploratory soil <br /> boring will be surveyed to the nearest 0.01 vertical feet. The elevations will be surveyed <br /> relative to mean sea level (MSL) based on San Joaquin County benchmark UV-34. The <br /> horizontal locations of the wells and borings will be measured using the GPS system. <br /> Surveying activities will be performed under the direction of a California-licensed <br /> surveyor. Surveying data will be forwarded to the State Water Resources Control Board <br /> for inclusion in the GeoTracker database. <br /> Well Development and Groundwater Sampling <br /> The newly installed groundwater monitoring and extraction wells will be developed a <br /> minimum of 72 hours after installation. Development will consist of surging with a <br /> bailer and groundwater pumping. Development will continue, to the extent practical, <br /> until the discharged water runs clean. After well development and stabilization of the <br /> water levels,water levels and the quantity of well volumes removed from the well will be <br /> recorded. <br /> A minimum of 24 hours after the groundwater monitoring wells have been developed, the <br /> wells will be purged and groundwater samples will be collected. The samples will be <br /> collected using a disposable bailer, transferred to laboratory-supplied glass vials, labeled, <br /> and placed in an ice-chilled cooler. The samples will remain chilled until relinquished to <br /> a state-certified analytical laboratory. Strict chain-of-custody procedures will be <br /> followed from the time the samples are collected until the time the samples are <br /> relinquished to the laboratory. The newly installed monitoring wells will be incorporated <br /> into the existing quarterly monitoring and sampling program. <br /> Waste Management <br /> All soil cuttings generated during the field activities will be placed on and covered with <br /> plastic sheeting, and stored at the site pending disposal. A composite sample will be <br /> collected from the soil cuttings for disposal characterization. Upon receipt of the <br /> analytical data, a licensed contractor will transport the soil to an appropriate disposal <br /> facility. <br /> P:\Joe's Truck Plaza\Work Plans\Does workplan 102103.doc <br />