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PANOCHE BURN SITE REMEDIATION <br /> Week 14- 12/23/96 through 12/27/96 <br /> Holiday and rain delayed work. <br /> Week 15 - 12/30/96 through 1/3/97 <br /> Holiday and rain delayed work. <br /> Week 16 - 1/6/97 through 1/10/97 <br /> The site was too wet for work. A sample of water was collected for possible discharge to the <br /> Little Panoche Creek. The water level was high because of the January storms. The fence was <br /> started around the top of the canyon. Erosion damage repair began. <br /> Week 17- 1/13/97 through 1/17/97 <br /> Rain delayed work. <br /> Week 18- 1/20/97 through 1/24/97 <br /> The site was still too wet to make repairs, and the rain continued. Additional erosion control <br /> materials were delivered. <br /> Week 19- 1/27/97 through 1/31/97 <br /> Erosion damage was repaired. The previous soil V-ditch on the down slope was damaged <br /> beyond repair. The canyon bottom and upper end were regraded. Swales were cut to divert <br /> runoff water. Silt fences were installed, as was a new 24-inch-diameter drainpipe down the <br /> face of the canyon bottom to carry water to the retention dam. Riprap was installed at major <br /> discharge points. <br /> Week 20-2/3/97 through 217/97 <br /> Riprap was installed below the 24-inch corrugated steel pipe. Cobble was place over the <br /> underground gas line where the site drainage crossed. Silt fences and biowaddles were <br /> installed to divert sheet flow from water. Erosion mat and hay-bale check dams were <br /> installed. Sukut cleaned up and demobilized on Tuesday, February 4, 1997. <br /> 3.2.2 Final Inspection <br /> Bob Logan/CH2M HILL conducted final inspection and acceptance of the site on Tuesday, <br /> February 4, 1997, as did Todd Thalhamer on February 21, 1997. The final Panoche site <br /> drawings and as-built drawings are in Appendix H. <br /> 3.2.3 Ash Contamination <br /> The extent of the ash/contaminated soil throughout the canyon exceeded the CIWMB's <br /> estimate by two-fold. The ash on the side slopes was expected to be approximately 1 to 2 feet <br /> deep; however, 1 to 5 feet of soil below the ash was removed and placed in the fill area. <br /> Approximately 12,470 cubic yards of ash and contaminated soil were encapsulated. The <br /> volume of ash was determined by comparing elevations from the initial site survey on <br /> September 10, 1996, and the final site survey on April 4, 1997. <br /> CIWMB 16 <br />