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Someone other than the person performing the original calculations will verify mathematical <br />calculations. Sample locations and depths will be recorded and reported with test results. <br />• Import soil <br />o Amount of Material Finer than the No. 200 Sieve (One per 2,500 yds <br />o Atterberg Limit (One per 2,500 yds <br />• Fresh Bentonite Slurry (sampled once daily) <br />o Mud Density <br />o Marsh Viscosity <br />o Filtrate Loss <br />• In- Trench Bentonite Slurry (sampled twice daily prior to the commencement of backfill <br />placement and within 5 ft of the trench bottom) <br />o Mud Density <br />o Marsh Viscosity <br />o Sand Content <br />• Backfill (sampled immediately before placing in trench) <br />o Amount of Material Finer than the No. 200 Sieve (once daily) <br />o Gradation (once Daily) <br />o Slump (twice daily) <br />o Density (twice daily) <br />o Permeability (with moisture content) — once every 1500 linear feet. Total of 5 tests for <br />the 7,200 ft of trench. <br />Tests shall conform to the following standards specified below: <br />• Viscosity and Mud Density of Bentonite Slurry - API RP 13B <br />• Percent Finer than No. 200 Standard Sieve - ASTM D 1140 <br />• Moisture Content - ASTM D 2216 <br />• Slump - ASTM C 143 <br />• Unit Weight of Soil - Bentonite Backfill - ASTM D 6023 <br />• Permeability - ASTM D 5084 <br />• Gradation — ASTM D 6913 <br />• Filtrate Loss — ASTM D 5891 <br />Whenever tests conducted by Lyman Henn indicate material or workmanship not in accordance <br />with the specifications, work shall be halted and the cause of the discrepancy shall be identified. <br />Work not in accordance with the specifications shall be removed, replaced, repaired, or <br />otherwise corrected so as to conform to the specifications. <br />G:\PROJECfS \111025 Geisert Gravel Pit Slurry Wall\O \Ol \Geisert Slurry Wall Design Report.doc <br />11 <br />