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<br /> City of Everett, Public Works Department, Water Pollution Control Facility <br /> <br />BIOSOLIDS SAMPLING & ANALYSIS PLAN 15 <br /> <br />Appendix E – Analysis Methods, Preservation and Holding Times <br /> (Reproduced from the General Permit – Table 3) <br />Parameter Methods Basic Preservation Maximum Holding Time <br />Arsenic <br />SW-846 6010 <br />SW-846 6020 <br />SW-846 7010 <br />SW-846 7061 <br />Cool to ~4° C 6 months <br />Cadmium <br />SW-846 6010 <br />SW-846 6020 <br />SW-846 7000 <br />SW-846 7010 <br />Cool to ~4° C 6 months <br />Copper <br />SW-846 6010 <br />SW-846 6020 <br />SW-846 7000 <br />SW-846 7010 <br />Cool to ~4° C 6 months <br />Lead <br />SW-846 6010 <br />SW-846 6020 <br />SW-846 7000 <br />SW-846 7010 <br />Cool to ~4° C 6 months <br />Mercury SW-846 7470 <br />SW-846 7471 Cool to ~4° C 28 days <br />Molybdenum <br />SW-846 6010 <br />SW-846 6020 <br />SW-846 7000 <br />SW-846 7010 <br />Cool to ~4° C 6 months <br />Nickel <br />SW-846 6010 <br />SW-846 6020 <br />SW-846 7000 <br />SW-846 7010 <br />Cool to ~4° C 6 months <br />Selenium <br />SW-846 6010 <br />SW-846 6020 <br />SW-846 7010 <br />SW-846 7741 <br />Cool to ~4° C 6 months <br />Zinc <br />SW-846 6010 <br />SW-846 6020 <br />SW-846 7000 <br />SW-846 7010 <br />Cool to ~4° C 6 months <br />Total Kjeldahl Nitrogen <br />(TKN) <br />SM 4500, Norg B <br />SM 4500, Norg C <br />ASTM D3590-89 <br />ASTM D3590-02 <br />Cool to ~4° C 28 days <br />Nitrate-nitrogen EPA 353.2 SM 4500-NO3 E, F, or H Cool to ~4° C 28 days <br />Ammonia-nitrogen SM 4500-NH3 B + C, D, E, or G Cool to ~4° C 28 days <br />Organic Nitrogen Calculated: TKN minus NH3-N Not applicable Not applicable