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From: Backus,Garrett <br /> To: "Keven Jones" <br /> Cc: Naidu,Muniaooa; Manzo, Elena K. <br /> Subject: RE:Arsenic Media Results-Ph.Call 04/01/2020-Selenium result <br /> Date: Thursday,April 9,2020 10:38:00 AM <br /> Attachments: 2020 02-26 CAM 17&STLC(Exhausted Media).pdf <br /> image001pnno <br /> imaae004.Dna <br /> Hi Keven, <br /> Another look at the test results found that the PQL practical quantitation limit for Selenium for both <br /> samples were 150 and 130 mg/kg which is above the TTLC limit of 100 mg/kg. The results do not <br /> demonstrate that they are not hazardous waste for Selenium even though the reported results are <br /> ND. Please ask the lab to explain how the results can be ND if their limit of measurement is 130 and <br /> 150. <br /> Thank you, <br /> Garrett Backus, Ld. Sr. REHS, CUPA programs <br /> San Joaquin County Environmental Health Department <br /> 1868 E Hazelton Ave, Stockton, CA 95205 <br /> (209)468-2986 gbackus&siaov.org <br /> https://www.segov.org/department/envhealth/ <br /> SAN JOAQUIN <br /> From: Backus, Garrett <br /> Sent:Thursday, April 9, 2020 9:53 AM <br /> To: 'Keven Jones' <kjones@qualityserviceinc.net> <br /> Cc: Naidu, Muniappa <Mnaidu@sjgov.org> <br /> Subject: RE: Arsenic Media Results - Ph. Call 04/01/2020 <br /> Hi Keven, <br /> For metals analysis you'll run CAM-17 (TTLC) first. If the results exceed the TTLC limit you have non- <br /> RCRA Haz Waste. <br /> If the TTLC result is 10 times greater than the STLC limit then run the STLC test. STLC results <br /> exceeding the STLC limit mean you have non-RCRA Haz Waste. <br /> If the TTLC result is 20 times greater than the TCLP (RCRA) limit then run the TCLP test. TCLP results <br /> exceeding the TCLP limit mean you have RCRA hazardous waste. <br /> Barium, Molybdenum and Chromium have some exemptions depending on the material and the <br /> limits found. <br />