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Table 4.8-5 summarizes the calculated constituent loads for these scenarios. <br /> Table 4.8-5 <br /> Summary of Constituent Loading Analysis for the College Park Site <br /> Constituent MHMP Proposed Literature-Based Proposed Land Use Difference in <br /> Land Use Land Use BMP Scenario with BMPS: Load with BMPs <br /> Existing Scenario Scenario Effectiveness Using Worst-Case vs. Existing <br /> without BMPs withoutBMPs Low-Range BMP Conditions <br /> Effectiveness <br /> lbs/event lbs/event lbs/event %reduction lbs/event %Reduction <br /> ` Conventional Constituents <br /> Oil and Grease 3,882 3,199 3,795 73-87 1,025 74 <br /> TSS 348,107 117,411 139,293 70-80 41,788 88 <br /> BOD 20,433 14,365 17,042 21-46 13,498 34 <br /> Nutrients <br /> TKN 3,552 2,203 2,614 25-78 1,960 45 <br /> Nitrate+Nitrite 4,138 1,352 1,604 25-78 1,203 71 <br /> Ammonia 1,214 598 709 25-78 532 56 <br /> .. Dissolved 470 206 244 25-78 183 61 <br /> phosphorus <br /> Total phosphorus 1,070 472 560 25-78 420 61 <br /> Trace Metals <br /> Total chromium 4.6 4.3 5.1 44-86 2.9 37 <br /> Dissolved 3.7 1.7 2.0 44-86 1.1 70 <br /> chromium <br /> Total copper 23 17 20 44-86 11 53 <br /> Dissolved copper 14.9 6.3 7.4 44-86 4.2 72 <br /> Total lead 13 10 12 44-86 6.8 48 <br /> Dissolved lead 7.0 3.2 3.8 44-86 2.2 69 <br /> Total mercury 0.1 0.1 0.1 44-86 0.0 54 <br /> Total selenium 0.9 1.3 1.5 44-86 0.8 7 <br /> Total zinc 137 98 116 44-86 66 52 <br /> Dissolved zinc 23 30 35 44-86 20 14 <br /> Pesticides <br /> Chlorpyrifos 0.0 0.1 0.1 55-95 0.0 NA <br /> Source:Data compiled by EDAW in 2004 <br /> IMPACTS AND MITIGATION MEASURES <br /> The proposed project would include the interim land disposal of treated wastewater on an adjacent property <br /> (Pombo property)via spray fields.The potential water quality impacts associated with the proposed use of treated <br /> wastewater(i.e.,recycled water)are not addressed in this EIR for the following reasons: (1)the interim spray <br /> r field operation would be temporary,phasing out once Old River discharges commence in association with the <br /> Mountain House W WTP(anticipated as early as the end of 2005); (2)the treated wastewater to be disposed of <br /> would receive tertiary treatment and would be applied at the agronomic rate such that no standing water would be <br /> College Park at Mountain House Specific Plan III Draft EIR EDAW <br /> San Joaquin County 4.8-13 Water Quality <br />