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KLEINFELDER File No. 20-1008-49.001 December 9, 1993 • Page 1, No. 3: On page 3 of our report, the hydrometer analyses results indicate that all three test pads have greater than 30 percent passing the minus No. 200 sieve. The combination silt and clay passing percentages comprise the minus No. 200 results. The minus No. 200 results for the ML, SP/SM, and SM test pads are 64 percent, 36 percent, and 36 percent, respectively. None of the tests pads were classified after the addition of Ione clay. The actual USCS classification for the ML test pad is sandy clay (CL). The classification for the SP/SM and SM test pads is clayey sand (SC). • Page 3, No. 1: This will be addressed during cover placement. • Page 3, No. 2: The county will remove the entire SP/SM test pad prior to final cover placement as requested. We propose to allow the SM and ML test pads to remain in place if the SM SDRI test passes. Continuity may be maintained by reworking, moisture conditioning, and recompacting these test pads during cover placement. • Page 3, No. 3: Although pertinent compaction curve data is presented on page 1 of Table I, we are providing copies of the compaction curves. • Page 3, No. 4: The county will provide this information. • Page 3, No. 5: Instead of constructing a new test pad, we propose to conduct a Sealed Double Ring Infiltrometer(SDRI) test on the "SM" test pad which already meets laboratory permeability requirements. This second SDRI test has been performed along with additional compaction testing and they are described below. FIELD COMPACTION TEST RESULTS A total of two nuclear field density tests (designated 1 and 2) were performed on the "SM" test pad within the vicinity of the new SDRI location. Results of all tests were verbally reported to you. In-place density and moisture content for Test Number 1 and 2 were performed in general accordance with ASTM Test Methods D-2922 and D-3017, respectively, (nuclear probe test method). Hole in the test pad because of testing were backfilled with a cement/bentonite slurry. A summary of field density tests consisting of test designations and locations, in-place dry densities and moisture contents, laboratory-obtained maximum dry densities and optimum moisture content, and specified and achieved relative compaction is attached. Samples of the materials tested were returned to the laboratory for determination of the maximum density- optimum moisture content. The laboratory test results are shown on Table I. Copyright 1993 KLeinfetder, Inc. Page 2 of 5