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n <br />Foothill Sanitary Landfill — Module 1 December 2003 <br />County of San Joaquin Job No. 031602.00.02 <br />8.0 MODIFICATIONS MADE DURING CONSTRUCTION <br />The following modifications to the Technical Specifications were made to the project <br />design and CQA program during construction. <br />® Specifications for minimum D85 particle size of drainage rock and pipe <br />perforation size. The minimum D85 particle size was changed from a particle <br />size of 0.45 inches to 0.37 inches as long as the perforation size in the pipe was <br />reduced from 0.2 -inches to 0.18 inches. This change was approved by the <br />Design Engineer in Submittal 25, and is included in Appendix P. <br />• Stormwater run-off interceptor. A stormwater interceptor was installed at the <br />southern leachate drainage trench to allow diversion of stormwater carried in the <br />LCRS system away from the leachate sump, thus minimizing the leachate <br />generation for Module 1. This interceptor was placed against, but is not attached <br />to the geomembrane, and is not part of the containment system. The interceptor <br />is temporary and has been placed such that it can be removed without affecting <br />the function of the liner and leachate collection systems. The figures for the <br />stormwater run-off interceptor are included as Exhibit E. <br />Vector Engineering, Inc. • 143E Spring Hill Drive • Grass Valley, CA 95945 • (530) 272-2448 <br />42 <br />