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Californi`tegional Water Quality Cool Board <br /> l\- Central Valley Region <br /> v Robert Schneider,Chair 'WWI <br /> Linda S.Adams Arnold <br /> remryJor warzeneBS <br /> Sacramento Main Office Scher <br /> Environmental 11020 Sun Center Drive H2O0,Rancho Cordova,California 95670-61 Governor <br /> E <br /> Protection Phone(916)464-3291 •FAX(916)464-4645 �� � <br /> http://vvv wv waterboards.ca.gov/centralvallcy Cell <br /> - <br /> 16 November 2006 NOV 2 n ENVIR CUu,7 <br /> Mr. Anthony J. Alegre PERMSR'VCEESI <br /> FTG Construction Materials, Inc. <br /> PO Box 1508 <br /> Lodi, CA 95241 <br /> TESTING OF BROKEN TILE FOR RE-USE AS ROADBASE AGGREGATE, FTG <br /> CONSTRUCTION MATERIALS, SAN JOAQUIN COUNTY <br /> Regional Water Quality Control Board staff has reviewed the test results for mixing broken <br /> roofing tile with ABS material. FTG Construction Materials (FTG) has a stockpile of broken tile <br /> waste from MonierLifetile that contains soluble concentrations of diesel range hydrocarbons <br /> and chromium VI that exceed water quality goals. FTG proposes to mix the tile waste with <br /> ABS aggregate for re-use as foundation material under concrete/asphalt parking lots, roads or <br /> building slabs. <br /> To support their proposed re-use FTG completed a testing program to determine if the tile can <br /> be re-used. Test results demonstrate that mixing ABS material with broken tile waste at a ratio <br /> of three to one, results in a product that contains no detectable diesel range hydrocarbon. <br /> However, the ABS, the broken tile, and the various ABS-tile mixtures tested contain <br /> approximately equivalent concentrations of soluble chromium VI, approximately 0.085 mg/I. <br /> Unmodified ABS, tile waste, and ABS/Tile waste mixtures all exceed the water quality goal for <br /> chromium VI of 0.021 mg/I. In these conditions no amount of mixing will produce a product <br /> that does not contain chromium VI in excess of the water quality goal. <br /> If a 3:1 ABS/tile waste mixture is used as a sub-base under asphalt or concrete and in an area <br /> where groundwater is at least 10 feet below the ground surface it should not be a threat to <br /> water quality. Therefore, tile waste can be recycled in ABS with restrictions that prevent <br /> exposure to rain or groundwater. FTG should submit a Report of Waste Discharge that <br /> proposes a method to manage the re-use of ABS/tile waste mixture. Staff will draft Waste <br /> Discharge Requirements or a waiver after we review and concur with the proposed discharge <br /> method. <br /> Ross Atkinson <br /> Engineering Geologist <br /> Title 27 Unit <br /> cc on following page <br /> California Environmental Protection Agency <br /> Q? Recycled Paper <br />