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y -- <br /> 9.3.4. 1 Soil samples shall be taken continuously for the first 10 feet <br /> and at 5-foot intervals thereafter. <br /> 9.3.4.2 Sampling shall be done with a split-spoon sampler (ASTM-D 1586- <br /> 67) or thin wall sampler (ASTM-D 1587-74) using standard sampling techniques <br /> in the auger borings. Where air rotary is used, samples will be collected <br /> from the discharge pipe at the intervals stated in Para. 9.3.4. 1. <br /> 9.3.4.3 Samples shall be stored in labeled, air-tight plastic or glass <br /> containers by the AE until such time as they are needed for testing or the <br /> contract is complete. <br /> 9.3.4.4 All soil samples shall be visually classified by the Unified <br /> Soil Classification System. The AE shall verify the classification by <br /> laboratory analyses consisting of the following. <br /> Test Description 0 Required/ Well <br /> a. Grain-size distribution (ASTM-D 421 & 422) 2 <br /> b. Atterberg limits (ASTM-D 4318) 2 <br /> C. Moisture content (ASTM-D 2216) 2 <br /> Specific soil samples to be tested, along with type of test, will be deter- <br /> mined by the AE after reviewing the boring logs. Laboratory analyses shall <br /> use equipment and methods described in EM-1110-2-1906 (Ref. 10.32) , or ASTM <br /> manuals (Referenced above) . <br /> 9.3. 5 Rock Sampling. No rock sampling is expected at this location. <br /> 9.3.6 Protection of Well. At all times during the progress of the work, <br /> precautions shall be used to prevent tampering with the well or the entrance <br /> of foreign material into it. Upon completion of the well, a suitable vented <br /> cap shall be installed to prevent material from entering the well. The well <br /> riser shall be surrounded by a larger diameter steel casing set into a con- <br /> crete pad and rising 24" to 36" above ground level. The steel casing shall be <br /> provided with lock and cap. A minimum three foot square, four inch thick con- <br /> crete pad, sloped away from the well shall be constructed around the well <br /> casing at the final ground level elevation. In accordance with Paragraph 7.0, <br /> a survey marker shall be permanently placed in each pad. Each survey marker <br /> Shall be stamped with the identifying number of the well and the final ad- <br /> justed step elevation of the survey marker (to the closest 0.01 foot) . Four, <br /> two-inch or larger diameter steel posts shall be equally spaced around the <br /> AA-30 <br />