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PANOCHE BURN SITE REMEDIATION placed perpendicular to the down slope with a minimum of 3-inch overlap. Work stopped over the Thanksgiving holiday. On November 27, 1996, the DFG notified the CIWMB engineer that the placement of the pyrolytic oil on top of the burn ash fill would not adequately protect fish and wildlife or their habitat. The CIWMB engineer authorized Sukut to place a"clay plug" throughout the stained area. A 60 mil co-extruded HDPE geomembrane was placed on top of the clay fill where the water level from the approximate 100-year storm contacts the clay plug. The geomembrane was anchored into a cutoff wall to prevent water from migrating into the contaminated soil. The cutoff wall was keyed into the natural clay barrier in front of the gravel lenses. Scrapers built an earthen berm leading to the mouth of the canyon. Week 11 - 12/2/96 through 12/6/96 Sukut continued to place the clay plug at the stained area in the bottom of the canyon and fabric with clay in the upper-west end of the fill area. CH2M HILL performed three nuclear density gauge tests in the southeastern strip (i.e., lower fill area). Scrapers moved soil from the upper plateau source and unloaded the clay along the northwestern area. Geotextile was unrolled in the northern-most area. The barrier layer was completed on the top deck. Sukut constructed the retention dam. CH2M HILL performed nuclear density gauge tests on each lift, and compaction results were good. The HDPE geomembrane liner was installed over the clay plug and stained areas of the side slope. Sukut excavated spillway and anchor trenches. Rain delayed work. Week 12- 12/9/96 through 12/13/96 The vegetative layer was placed over the barrier layer. Sukut finished the spillway cut for the new retention dam. Swales were cut at the top of the canyon, and the cutoff wall was excavated for the HDPE liner. Rain delayed work. Sukut built the check dam above the toe of the HDPE liner to protect the cutoff wall from runoff. The cut off wall was reworked, and erosion damage was repaired. The CIWMB engineer and U.S. EPA federal coordinator visited the site. Sukut continued to place vegetative layer at the upper end of the canyon. Sukut began final grading at upper canyon and placed the barrier layer on the geotextile and HDPE liner. The concrete subcontractor installed rebar in the spillway. The water truck was still needed to moisture-condition soil for proper compaction. Week 13 - 12/16/96 through 12/20/96 Hydroseeding began, and erosion control blankets were installed. The concrete subcontractor poured spillway. Hydroseeding was completed, and Armor-Loc was placed on the top of the dam. The fencing subcontractor began installing posts. A Central Valley RWQCB field representative performed a final site walk with the CIWMB project engineer. CIWMB 15