ARCHIVED REPORTS_1995 - Laserfiche WebLink

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LH KLEINFELDER File No. 20-1008-49.001 August 19, 1994 On July 29, 1994, eleven haul trucks (each carrying approximately 26-tons)delivered Ione clay to the test pad. A blade spread the clay to a fairly uniform thickness on the test pad. The spreading effectiveness was confirmed by measuring clay thickness at random locations. Premixing of the Ione clay and the upper soil was performed by a large rototiller (CMI RS- 500). One pass at a 2-inch depth was made which appeared to break up the larger clods well. Final mixing involved two passes to achieve the required specifications. During the final pass water was added to the soil by utilizing a spray bar attached to the mixer. Samples of the test pad materials were then acquired for compaction curves, Atterberg Limits, gradations, and hydrometer analysis. The actual classification of the pad barrier soils is clayey sandy silt (ML). Results of the Atterberg Limits and test pad soil composition are summarized in the table below. Test Hydrometer Pad Analysis. Percent Plasticity Liquid Soil Description Sand Silt Clay Index Limit Red-brown ANIL clayey sandy silt 45,43 35,32 20,25 9,9 13,17 qW ( L) Loose thickness of the mixed material was measured at several locations on the test pad with an average loose thickness of approximately 17 inches. A CAT 825C sheepsfoot compactor was utilized to compact test pad soils. Approximately 8 passes per lift were required to achieve a minimum relative compaction of 95 percent on the "2-lift" process test pad; approximately 14 passes were required on the "single-lift" construction test pad. FIELD COMPACTION TEST RESULTS A total of 50 nuclear field density tests (designated 1 through 50) were performed on the test pad foundation layer and the test pad between July 28 and August 2, 1994. Results of all tests were verbally reported to Mr. Gabriel Karam of San Joaquin County. In addition, a single sand cone density test (designated SC-1) was also performed at the site on August 2, 1994. In-place density and moisture content for Test Numbers 1 through 50 were performed in general accordance with ASTM Test Methods D-2922 and D-3017, respectively (nuclear probe test method). An in-place moisture content for Test Number SC-1 was evaluated in general accordance with ASTM Test Method D-2216 (oven-dried test method). The sand cone density tests was performed in general accordance with ASTM Test Method D-1556. Holes in the test pad due to testing were backfilled with commercially available powder form bentonite clay. _ GSM:md 13/94 Copyright 1994 Kleinfetder, Inc. Page 3 of 7