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8. Pertinent well information including well identification, well type, well depth, well casing <br /> diameter (if more than one size used), and perforated or slotted interval should be <br /> permanently affixed to the interior of the security structure. <br /> 9. Permanently affixed to the exterior of the well security structure is the well identification <br /> number and well type. <br /> 10. Exploratory borings drilled in contaminated areas are sealed from the ground surface to <br /> the bottom of the boring with bentonite grout. Borings drilled In clean areas are bottom- <br /> sealed with a minimum of five feet of bentonite and the remainder with clean auger <br /> cuttings. The top three feet is then sealed with bentonite grout and resurfaced with <br /> concrete. <br /> 11. All slurry-type grouts used to destroy a boring or for well seals are emplaced by the <br /> tremae method <br /> 12. Vadose and groundwater monitoring wells are designed by a qualified person such as <br /> . hydrogeologist, geologist, certified civil engineer, or engineering geologist. <br /> 13. Reports concerning the construction, alteration, or destruction of vadose and <br /> groundwater monitoring wells are prepared for each well or boring. These reports should <br /> contain at least the following: <br /> a. A detailed plot plan giving location of property lines, existing improvements such <br /> as structures, underground tanks, underground utilities, underground piping, and <br /> the location of the monitoring well. <br /> b. A detailed log giving the color, gram size distribution, and character of all the <br /> lithologic units penetrated. <br /> C. A detailed "as-built" well construction diagram giving type of well casing, <br /> perforated or screened interval, perforation or screen size, type of gravel pack, <br /> location of bentonite seal, type of annular seal, and quantities of material used. <br /> d. All sample analysis testing results. <br />