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kn File No. 20-1008-49.001 KLEBNFELDER July 8, 1993 Borrow Soil Description -200 Sieve (Percent Passing) Gray sand (SP) 4% Brown silty sand (SM) 28%, 26% Based on the sieve analysis and visual observations, SP/SM material was not present in the borrow area. We recommended mixing two parts SP material to one part SM material to achieve the SP/SM test pad soil as required by the CQA plan. Mixing was accomplished by thinly spreading two scrapper loads of SP material on one load of SM material and blading this mixture. This soil mixture was then transported by scrapper to the test pad where additional lab testing was performed. TEST PAD CONFIGURATION The test pads were approximately 150 feet in length. The ML and SM test pads were approximately 23 feet wide; the SP/SM test pad was approximately 46 feet wide. The long axis of the test pads were aligned in a north/south direction. The actual configuration of the test pads is shown on Plate I. SITE PREPARATION Prior to construction of the test pad, the site was cleared of all brush, grass and any other organic matter which had grown subsequent to the completion of the foundation layer. Foundation material removed during the course of this procedure was replaced and the foundation layer was restored to its original final grade and surveyed by the County. The foundation layer was compacted to a minimum relative compaction of 90 percent (ASTM test method D-1557 "A"). TEST PAD CONSTRUCTION Approximately 15 to 16 inches of SP/SM, SM, and ML materials were placed by county crews in the respective locations on the test pad. Composite samples from five locations from each test pad were acquired for sieve analysis to verify visual classification and the results were as follows: Test Pad -200 Sieve (Percent Passing) ML 56%, 53% SP/SM 15%, 12% SM 22% Copyright 1993 Kleinfelder, Inc. Page 2 of 7