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2 .3 Cement <br /> 2 . 3 . 1 All cement used on all work shall be Florida Class H sulfates resistant <br /> cement (ASTM C1 50, Type 11) conforming to the "Specifications for Oil - <br /> Well Cements and Cement Additives" (API Standard l0A) . <br /> 2 .4 Gravel <br /> 2 .4 . 1 Gravel must conform in size to SJRWMD rules, regulations, or permit <br /> conditions for well abandonment and the borehole/casing diameter. <br /> Gravel or sand shall only be used during grouting activities if pre- <br /> approved by the ENGINEER. <br /> 2 . 5 Cement Additives <br /> 2 . 5 . 1 Cement additives that may be used to cement in zones of high <br /> permeability (cavities) after being approved by the ENGINEER are : <br /> calcium chloride, gilsonite, cellophane flakes, kolite or equivalent, and <br /> bentonite. Organic polymers , peanut shells, cotton seed hulls may not <br /> used as lost circulation materials . <br /> 2 . 6 Accelerants <br /> 2 .6. 1 Up to four percent CaCl2may be used as a hardening accelerant after <br /> being approved by the ENGINEER, in which case setting times can be <br /> reduced by one half. Use of CaCl2greater than two percent must be pre- <br /> approved by the SJRWMD . <br /> 3.0 EXECUTION <br /> 3 . 1 Cement Grout Mix <br /> 3 . 1 . 1 Portion 1 cubic foot of cement ( i . e. , one 94 pound sack) to not more than <br /> 6.0 gallons of water. Cool clean potable water shall be used to <br /> mechanically mix with cement at the site immediately before placement. <br /> The CONTRACTOR shall make arrangements to secure the volume of <br /> potable water required to complete the work. Consistency and mixing <br /> shall be approved by the ENGINEER. <br /> 3 . 1 .2 The cement grout maybe composed of between 4 to 12 percent additives <br /> if the need for such additives can be justified. A maximum 12 percent of <br /> GROUT <br /> 02090 - 2 <br /> C:\DOCUME- 1 \mikeh\LOCALS— I \Temp\Temporary Directory 16 for IRC wells Div I .zip\08-1RC_Gr011t.doc <br /> 10/ 17/07 <br />