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REV96134
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REV96134
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Entry Properties
Last modified
8/25/2016 3:20:55 AM
Creation date
11/21/2007 11:56:18 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1999021
IBM Index Class Name
Revision
Doc Name
TECHNICAL SPECIFICATIONS FOR THE CONSTRUCTION OF STEGNER FARMS PIT SLURRY WALL LARIMER CNTY COLO
Type & Sequence
TR1
Media Type
D
Archive
No
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<br />DIVISION 2 -SITE WORK <br />SECTION 02168 -SLURRY WALL CONSTRUCTION <br />PART1-GENERAL <br />1.O1 SLURRY TRENCH CUT-OFF <br /> <br />The work consists of famishing all plant, labor, equipment, and materials and of performing all operations <br />az required to construct the slurry vench cut-off wall. <br />A low permeability slurry trench cut-off wall shall be conswcted to the lines, grades, and cross-sections az <br />indicated on the drawings. The vench shall have essentially vettical walls, a minimum width of 24 inches, <br />and shall extend through the foundation materials and into the bedrock. A generalized description of the <br />overburden through which the slurty trench cu[-off is to be excavated is indicated by geologic cross- <br />sections included in the Drawings. <br />PART 2 - MATERL4LS <br />2.01 SLURRY <br />Slurry shall consist of a stable colloidal suspension of bentonite in water and shall be controlled in <br />accordance with the most current API Standard 13B, "Standard Procedure for Testing Drilling Fluids," and <br />the fallowing requirements: <br />A. At the time of introduction of the slurry into the trench, the slurry shall be a mixture of not less <br />than 12.5 pounds per barrel (42 gallons) of bentonite and water. Additional bentonite may be <br />required depending on the hardness and temperature of the water and the quality of the bentonite. <br />The slurry shall have a minimum apparent viscosiry of 30-seconds reading through a Marsh <br />Funnel Viscosimeter, a maximum filtrate loss of 30 cubic centimeters in 30 minutes at 100 psi, and a <br />pH of not less than 8. <br />B. The slurry mixture in the vench will have a unit weigh[ not less than 64 pcf (1.03 gm/cc), not <br />greater than 87 pcf (l.-l0 grn/cc), or as approved by the Engineer. <br />C. The slurry mixed with backfill material shall be either slurry taken from the trench or slum meeting <br />the requiremenu of slurry introduced into the trench. <br />2.02 BENTONITE <br />Bentonite used in preparing slum shall be pulverized (powder) premium grade sodium cation <br />montomorillonite and shall meet the most current API Standard 13A, "API Specification for Oil-Well Drilling <br />- Fluid Materials." <br />2.03 WATER <br />Fresh water, free of excessive amounts of deleterious substances that adversely affect the properties of the <br />slurry shall be used to manufacture bentonite slurry. I[ is the responsibility of the Contractor that [he slurry <br />resulting from the water shall always meet the standards of this Specification. <br />01/99 Section 02168 -Page 1 of 5 <br />
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