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Section: Quality ControlSection: Quality Control <br />This Page is to be Stamped <br /> <br />June 13, 2025 <br />Tracy Material Recovery & Solid Waste WS Lab No.: STK2537704 <br />Customer No.: 3016455 <br /> <br />Quality Control - Metals <br />Constituent Method Date/ID Type Units Conc.QC Data DQO Note <br />Metals <br />Arsenic 3050 06/11/2025:206445AC Blank mg/kg ND <4 <br />LCS mg/kg 40.00 94.8%85-115 <br />MS mg/kg 40.00 93.1%75-125 <br />(CC 2581228-001)MSD mg/kg 40.00 93.7%75-125 <br />MSRPD mg/kg 0.6%≤20 <br />PDS mg/kg 40.00 91.7%75-125 <br />Cadmium 3050 06/11/2025:206445AC Blank mg/kg ND <0.3 <br />LCS mg/kg 40.00 97.0%85-115 <br />MS mg/kg 40.00 97.2%75-125 <br />(CC 2581228-001)MSD mg/kg 40.00 100%75-125 <br />MSRPD mg/kg 2.9%≤20 <br />PDS mg/kg 40.00 96.2%75-125 <br />Chromium 3050 06/11/2025:206445AC Blank mg/kg ND <0.5 <br />LCS mg/kg 40.00 99.1%85-115 <br />MS mg/kg 40.00 105%75-125 <br />(CC 2581228-001)MSD mg/kg 40.00 109%75-125 <br />MSRPD mg/kg 3.3%≤20 <br />PDS mg/kg 40.00 105%75-125 <br />Copper 3050 06/11/2025:206445AC Blank mg/kg ND <0.5 <br />LCS mg/kg 40.00 101%85-115 <br />MS mg/kg 40.00 138%75-125 435 <br />(CC 2581228-001)MSD mg/kg 40.00 134%75-125 435 <br />MSRPD mg/kg 1.3%≤20 <br />PDS mg/kg 40.00 123%75-125 <br />Lead 3050 06/11/2025:206445AC Blank mg/kg ND <1 <br />LCS mg/kg 40.00 100%85-115 <br />MS mg/kg 40.00 104%75-125 <br />(CC 2581228-001)MSD mg/kg 40.00 106%75-125 <br />MSRPD mg/kg 2.4%≤20 <br />PDS mg/kg 40.00 105%75-125 <br />Molybdenum 3050 06/11/2025:206445AC Blank mg/kg ND <0.3 <br />LCS mg/kg 24.00 95.1%85-115 <br />MS mg/kg 24.00 103%75-125 <br />(CC 2581228-001)MSD mg/kg 24.00 104%75-125 <br />MSRPD mg/kg 0.8%≤20 <br />PDS mg/kg 24.00 101%75-125 <br />Nickel 3050 06/11/2025:206445AC Blank mg/kg ND <0.5 <br />LCS mg/kg 40.00 100%85-115 <br />MS mg/kg 40.00 106%75-125 <br />(CC 2581228-001)MSD mg/kg 40.00 108%75-125 <br />MSRPD mg/kg 1.8%≤20 <br />PDS mg/kg 40.00 104%75-125 <br />Selenium 3050 06/11/2025:206445AC Blank mg/kg ND <0.3 <br />LCS mg/kg 40.00 93.5%85-115 <br />MS mg/kg 40.00 90.9%75-125 <br />(CC 2581228-001)MSD mg/kg 40.00 93.2%75-125 <br />Corporate Offices & Laboratory <br />853 Corporation Street <br />Santa Paula, CA 93060 <br />TEL: (805)392-2000 <br />CA ELAP Certification No. 1573 <br />Office & Laboratory <br />2500 Stagecoach Road <br />Stockton, CA 95215 <br />TEL: (209)942-0182 <br />CA ELAP Certification No. 1563 <br />Office & Laboratory <br />563 E. Lindo Avenue <br />Chico, CA 95926 <br />TEL: (530)343-5818 <br />CA ELAP Certification No. 2670 <br />Office & Laboratory <br />9411 W. Goshen Avenue <br />Visalia, CA 93291 <br />TEL: (559)734-9473 <br />CA ELAP Certification No. 2810 <br />Office & Laboratory <br />3442 Empresa Drive, Suite D <br />San Luis Obispo, CA 93401 <br />TEL: (805)783-2940 <br />CA ELAP Certification No. 2775 <br />ENVIRONMENTAL AGRICULTURAL <br />Analytical Chemists