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Page 1 of 1 <br /> Garrett Backus [ H] <br /> From: Garrett Backus [EH] <br /> Sent: Friday, March 19, 2010 12:19 PM <br /> To: 'derricj@herricksteel.com' <br /> Subject: Toxicity information <br /> Attachments: Toxicity Regulations.pdf <br /> Derric, <br /> To show whether the blaster dust is hazardous waste in California you have to determine two things: <br /> 1. Is the blaster dust smaller than 100 microns in size? Metal waste larger than 100 microns in size can be sent <br /> to a metal recycler. Metal waste which is hazardous waste and smaller than 100 microns in size must be handled <br /> as hazardous waste. The test shows 15% less than 100 microns so more analysis is required. <br /> 2. Is the blaster dust a hazardous waste as defined by California regulation? Hazardous wastes are <br /> characterized by four properties: ignitability, corrosivity, reactivity or toxicity. The analysis Stockton Steel is doing <br /> will show whether the blaster dust is toxic. Title 22 section 66261.24 shows how to test for toxicity. FGL did the <br /> TTLC test to determine if the blaster dust passes the STLC and TTLC limits listed in Table 2. FGL did not test for <br /> Chromium(VI). Since the results exceed the STLC limits for Chromium, Copper, Nickel and Selenium, the STLC <br /> test needs to be run for these elements. Chromium is a special case and also needs the TCLP test to show if the <br /> level exceeds the value for Chromium in Table 1. <br /> Garrett Backus, REHS <br /> San Joaquin County Environmental Health Department <br /> 600 E. Main Street <br /> Stockton, CA 95202 <br /> telephone: (209) 468-2986 <br /> fax: (209) 468-3433 <br /> email: gbackus@sjcehd.com <br /> 3/19/2010 <br />