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~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ S i i ~ <br />TABLE 1 <br />Materials Quality Control Program <br />Soil/Bentonite <br />Slurry Trench Cut-Off Wall <br />SUBJECT STANDARD TYPE OF TEST MINIMUM FREQUENCY SPECIFIED VALUES <br /> Water ---- -pH Per water source or as As required to properly <br /> -Total Hardness changes occur hydrate bentonite with <br /> a roved additives <br /> Additives ---- Manufacturers certificate of One time As approved by Engineer <br /> compliance with stated <br /> characteristics <br /> Bentonite API Std 13A Manufacturers certificate of One lime Premium grade sodium <br />Material compliance cation montmenlloni[e <br /> Backfill Soils ---- Selected soils obtained from a Per borrow source or as -65 to 100% passing 3/8" <br /> borrow area approved by the changes occur sieve <br /> Engineer -40 to 85% passing #20 <br /> sieve <br /> -25 to 40% passing #200 <br /> sieve <br /> Roll to 1/8" thread <br /> Prepared (or API Std 138 -Unit Weigh[ Unit weight z 1.03 gm/cc <br /> Placement into the -Viscosity V z 40 sec-March @ 68° <br /> trench 1 se[ per shift or per batch <br /> -Filtrate Loss (pond) Loss s 30 cc in 30 min. <br />Slurry @ 100 psi <br /> - H H z 8 <br /> In Trench API Std 13B 1 -Unit Weight 1 set per shift at point of Uni[ weight = 1.03 - 1.40 <br /> uenching ~ gm/cc <br /> Al Trench ASTM C 143 -Slump 1 set per 100 cu/yds. -Slump 2 to 6 inches <br /> -Gradation 1 set per 300 cu/yds. -65 to 100% passing 3/8" <br /> sieve <br />eackfill Mix -40 [0 85% passing #20 <br /> sieve <br /> -25 to 40% passing #200 <br /> sieve <br />