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DRAFT <br /> 3.1.4 STANDARDS FOR AUGER DRIWNG <br /> Auger drilling is hole advancement by rotating an auger while pressing it into the soil. Three <br /> types of augers are commonly used at hazardousauger waste s a helix t an1gestem we welded auger,onto a sol d <br /> low <br /> stem auger, and a bucket auger. The solid stem g <br /> pipe. The hollow stem auger is a helix flange welded onto a hollow pipe. The bucket auger <br /> is a cylinder with a bottom that has a toothed opening to slice into the soil. <br /> Solid stem and bucket augers have a limited use at hazardous waste sites because there is <br /> no way to prevent the spread of contamination during augering and no way to collect <br /> undisturbed samples. <br /> Standard 21.4.1 Solid stem and bucket augers shall not be used to drill through <br /> contaminated materials or to drill into saturated materials. <br /> 3.2. CORING STANDARDS <br /> Cores are time-consuming to drill, sensitive to moisture changes and pressure changes at the <br /> surface, and bulky. However, cores are the best tools to determine exactly what the <br /> subsurface geology is at the drill hole. Because of the expense of drilling cores and the value <br /> of the information derived from the cores, it is important to handle and store the cores in a <br /> manner that preserves the cores throughout the duration of the project. <br /> Standard 22.1.1 All coring bits, core liners, and core catchers shall be <br /> decontaminated prior to taking each core. <br /> Standard 2.2.1.2 All cores shall be drilled using clean, shatter-proof liners. Cores <br /> shall be kept in their liners until logging. <br /> Standard 2.2.1.3 All cores shall be stored in core boxes by cutting the liners and <br /> cores to length, capping with moisture-proof caps, marking the depth at each end of <br /> each length of liner, and placing the cores in the core boxes in order by depth. <br /> Unrecovered intervals of cores shall be indicated on a water-proof card kept with each <br /> core box. <br /> Standard 22.1.4 Core boxes with cores shall be stored for the duration of the project. <br /> The storage location shall be secure and shall be kept locked, except as access is <br /> required by authorized personnel. <br /> Standard 221.5 A sign-out list shall be maintained at the core storage location. <br /> Cores removed for logging or sampling shall be returned to the core boxes. Portions <br /> of cores removed for sampling shall be indicated by notation on a water-proof card to <br /> be kept with each core box. Core drilling requires fluid circulation to cool the bit and <br /> remove cuttings. The standards for circulating fluids listed under Section 13.2 apply <br /> to core drilling. <br /> �� These standards are for review and comment only <br />