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TABLE 1 <br /> Southwest Reservoir Slurry Wall Construction <br /> Quality Control Program <br /> Subject Standard Type of Test Minimum Frequency Specified Values <br /> Trench Bottom Soundings — . Key trench depth soundings • Per 10 lineal feet • Greater of design depth or 4'key <br /> Bottom Key Bedrock Samples — . Construction documentation • Per cut . Less weathered bedrock by observation <br /> Backfill Profile Soundings — • Backfill profile soundings ' Beginning and • Consistent measurements with no indications of <br /> end of each shift sloughing or caving <br /> . pH • Per water source pH between 6.0&8.0 <br /> Water — Total Hardness o�rchanges Hardness less than or equal to 200 ppm <br /> • Manufacturers certificate of <br /> Additives — compliance with stated • One time As approved by Engineer <br /> Materials characteristics <br /> Bentonite API Std 13A Manufacturers certificate of <br /> compliance Each truck load • Premium grade sodium cation montomorillonite <br /> Supplemental • Selected soils obtained from • Per borrow source . t 50%passing#200 <br /> Fines — a borrow area as approved or as changes . Roll to 1/8"thread <br /> by the Engineer occur <br /> Prepared for • Unit Weight • Twice per shift • Unit weight t 1.03 gm/cc(64.27 pcf) <br /> placement into API Std 138-1 Viscosity . Twice per shift . t 40 sec-Marsh @ 68•F <br /> the trench pH • Once per shift . t 7&<10 <br /> Slurry Filtrate Loss • Once per week . Loss 5 30 cc in 30 min.@ 100 psi <br /> • Unit Weight . Twice per shift . 1.03-1.40 gm/cc(64.27—87.36 pcf) <br /> In Trench API Std 13B-1 Viscosity . Twice per shift . t 40 seo-Marsh @ 68° <br /> • Filtrate Loss . Twice per shift • Loss 5 30 cc in 30 min.@ 100 psi <br /> • Sand Content . Twice pershift • Sand content 5 20%by volume <br /> • Unit Weight . Twice per shift . t Slurry in trench plus 15 pcf <br /> • Slump . Twice per shift . 2"to 6" <br /> • Gradation • Once per shift • 65 to 100%passing 318" <br /> Backfill Mix At Trench ASTM C-143 • 40 to 85%passing#20 <br /> . t 30%passing#200 <br /> • Moisture Content . Once per shift . None <br /> • Triaxial Permeability Test . One per 1,500 If . 51 x 10-7 cm/sec <br /> NOTES. <br /> 1. Supplemental fines will be stockpiled in a windrow along the construction platform. The volume of supplemental fines stockpiles at each station shall be based on the design <br /> amount required to provide backfill having>30%passing the No.200 sieve. <br /> Q 10212 SW—A SpnW0212 010 S.A—t R.—,%M W4Techn-1 Sp—%Md 1.0"4ty C.*.Ltel dw <br />