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JEA were hired to assist the County in understanding this complex issue. They have reviewed all available <br />data and have compiled four technical memorandums (TM), which are listed as follows: <br />TM 1: Data Collection, Trend Analysis <br />TM2: Data Collection, Biosolids <br />TM3: Phosphorus Budget <br />TM4: Waterbody Identification (WBID) Assessment <br />All the technical memorandums can be reviewed in Attachment 2. In addition, JEA has also compiled a <br />quick summary/ fact sheet of the BCL water quality, which can be found in Attachment 1. <br />Data presented to the TAC by SJRWMD staff shows that there has been an increase in phosphorus <br />concentrations in the Upper St Johns River Basin (includes BCL) that match up in time with an increase in <br />biosolids land application. This increase of phosphorus in the basin appears to be coming from the excessive <br />application of phosphorus contained within the biosolids applied to the land, well in excess of the <br />agronomic rates recommended for phosphorus application. <br />Sourlce o_f tVutrients - Phosphorlus <br />Fertilizer Label <br />N — P2O5 — K2O <br />4-1-2 <br />N—P—K <br />4-0.436 —1.66 <br />Blosollds <br />N—P— K <br />4-2.—? <br />WAS fertilization recommendation <br />for grazed beef cattle: <br />11-171b P/ac/year <br />If soil and or tissue tests are low <br />2017 USJRB Calculated Application <br />Rate: 106 lb P/ac/year <br />20,165 ac spread/58,859 permitted <br />Applying 5-10 times the <br />crop TP need <br />The following is a graphic prepared by SJRWMD staff showing the water quality monitoring station locations <br />in relation to the sites in the basin permitted for land application of Class B biosolids. In 2017, 89% of all the <br />biosolids land applied in the upper St. Johns River basin came from outside the basin. <br />135 <br />