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7 <br /> FIELD METHODS Ara z <br /> Site Safety Plan <br /> The site safety plan describes the basic safety requirements for the drilling of soil borings <br /> at the work site and includes propane for the vapor-extraction test. The safety plan is <br /> applicable to personnel and subcontractors of RESNA The RESNA' geologist will act as <br /> the Site Safety Officer Personnel at the site will be informed of the contents of the site <br /> safety plan before work begins A copy of the plan will be kept at the work site and will be <br /> available for reference by appropriate parties during the work Plate 1S, which shows the <br /> route to the nearest hospital, is included in the plan <br /> ,Sampling and Handling <br /> Soil samples selected for possible chemical analysis will be sealed quickly with aluminum <br /> foil, plastic caps, and tape The samples will be labeled and placed in iced storage and <br /> maintained at 4 degrees centigrade for transport to the analytical laboratory <br /> Chain of Custody Records will be initiated in the field by the geologist, updated throughout <br /> handling of the samples, and sent along with the samples to the laboratory Copies of Chain <br /> of Custody Records will be included in our final report <br /> Ground-Water Pumping Test Well Construction <br /> The pumping test well will be constructed in the boring with thread jointed, 6-inch-inner- <br /> diameter, Schedule 40 polyvinyl chloride (PVC) casing No chemical cements, glues, or <br /> solvents will be used in well construction The screened portion of the well will consist of <br /> 6-inch-diameter wire-wrapped screen casing with 0 020-inch-wide slots <br /> The screened interval will allow sampling at the air-water interface during seasonal <br /> fluctuations of the groundwater level The annular space in the well will be packed with <br /> number 3 sand to approximately 1 to 2 feet above the slotted interval. A 2-foot thick <br /> bentonite plug will be added above the sand pack The remaining annulus will be backfilled <br /> to grade with a bentonite cement slurry <br /> The well will be protected with a traffic-rated, cast-aluminum utility box equipped with a <br /> PVC skirt The box has a watertight seal to protect against surface-water infiltration and <br /> must be opened with a special wrench. The design of this box discourages vandalism and <br /> reduces the possibility of accidental disturbance of the well <br /> 38009-SW <br />