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PANOCHE BURN SITE REMEDIATION <br /> 5 <br /> 1.0' MIN VEGETATIVE LAYER j <br /> 8 oz. FILTER <br /> GEOTEXTILE <br /> 2.0' MIN BARRIER LAYER <br /> ------(CLAY)- ---- <br /> 1.5' MIN FOUNDATION LAYER -~ <br /> 2.0' MIN CONTAMINATED SOIL —I� <br /> BURN ASH <br /> TOP DECK COVER SYSTEM <br /> 2D� <br /> L <br /> 1.01' MAIN <br /> 2.0' MIN VEGETATIVE LAYER <br /> BARRIER LA YER <br /> 1.0 MIN (CLAY) <br /> _ FOUNDATION <br /> �'-- LAYER \ <br /> ONTgMINATED SOIL AND B �G0 MEMBRANE <br /> URN ASH <br /> SLOPE COVER SYSTEM <br /> Figure 8. Cover Designs for the Top Deck and Slope Covers <br /> 3.4 Site Assessment <br /> Based on the previous U.S. EPA samples, the C1WMB elected to further delineate the nature <br /> and extent of the zinc contamination at the site and determine if the soils beneath the site <br /> contained pyrolytic oil. The U.S. EPA laboratory results from the May 28, 1997, sampling <br /> indicated the ash contained high levels of zinc and petroleum hydrocarbons. Because research <br /> is limited on the environmental and health effects from a large tire fire, the C1WMB used an <br /> aggressive sampling program during the project to better understand and identify the <br /> chemical hazards at the site. <br /> CIWMB 22 <br />