Resolution No. 4793 - Laserfiche WebLink

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MWMC FAC1Lff~E$ PLAN Biosolids Quality According to current state and new federal regulations (40 CFR, Part 503), biosotids samples should be analyzed for the parameters listed in Table 5.1.4-1. TABLE 5.1.4-1 Sampling Requirements for EPA 40 CFR, Part 503, Sludge Regulationsa MWMC Facility Plan, Eugene-Springfield Parameter Units Arsenic mg/kg dry weight Beryllium mB/kg dry weight Cadmium mB/kg dry weight Copper mB/kg dry weight Lead mB/kg dry weight Mercury mB/kg dry weight Molybdenum mcj/kg dry weight Nickel rog/kg dry weight Selenium mB/kg dry weight Zinc mB/kg dry weight Total Nitrogen % dry weight Nitrate nitrogen % dry weight Ammonia nitrogen % dry weight Phosphorus % dry weight Potassium % dry weight pH standard units Total sofids % dry weight Volatile solids % dry weight PCBsb ,ug/kg a From 40 CFR, Part 503 (December 1992). b PCBs indude PCB-lO16,-1221 ,-1232,-1242,-1248,-1254, and -1260. The nitrogen, phosphorus, and potassium content of the bio,solids are important when applying biosolids at agronomic rates. Nitrogen content can vary significantly in the biosohds depending on its source, age, and history. The concentration levels of these nutrients should be determined from samples taken immediately prior to biosolids application because stored biosolids can lose nitrogen rapidly. Therefore, it is important that the real nitrogen content of the biosotids is known to avoid under- or over-application. The available nitrogen in the biosolids was determined assumh~g the following: 15-20 percent of the organic nitrogen will be available ( Cogger, Sul~van, et. al. indicate lagoon stored biosolids typically mineralize organic nitrogen in 15 to 20 percent range) e 50 percent oX the ammorda nitrogen will be available ~ 100 percent of the nitrate-nitrite nitrogen will be available MWMC_5.0_REVB_VKS DOC