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PROPOSED SPECIFICATION REVISIONS FOR THE USE OF <br /> CRUSHED ROCK WITH GEOTEXTILE CUSHION <br /> Foothill Landfill Module 1 LCRS, North County Landfill Module 4 LCRS, <br /> And Future Modules <br /> SECTION 02200—SITE EARTHWORK,PART 2—PRODUCTS <br /> Crushed rock drainage layer may be substituted for gravel drainage layer and drainage <br /> gravel, subject to placement of a geotextile cushion on top of the HDPE geomembrane, <br /> prior to placement of crushed rock. <br /> Add Item 2.10 ALTERNATIVE CRUSHED ROCK DRAINAGE LAYER <br /> A. Source: Contractor selected on-site or off-site borrow areas. <br /> B. Crushed rock material. <br /> C. Containing no limestone or other material which will adversely <br /> react with the leachate. <br /> D. Minimum hydraulic conductivity of 0.5 cm/sec. <br /> E. Particle size gradation requirements: <br /> Sieve Percent Passing <br /> 3/4" 100 <br /> 5/8" >90 <br /> 3/8" <10 <br /> 200 <3 <br /> SECTION 02772—GEOTEXTILE,PART 2—PRODUCTS. <br /> Subsection 2.01 —GEOTEXTILE,Add the following: <br /> C. Geotextile products include: <br /> 1. Geotextile Cushion where shown on the construction drawings. <br /> 2. 8 oz/sy geotextile where shown on the construction drawings, <br /> identified as"8 oz/sy Geotextile"or"Geotextile Separator". <br /> Crushed Rock w/Geotextile Cushion 1 <br /> Printed 5/1103 <br />