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WASTE DISCHARGE REQUIREMENTS ORDER NO. R5-2014-0006 -21- <br />FORWARD INC. AND REPUBLIC SERVICES INC. <br />FORWARD CLASS II LANDFILL <br />SAN JOAQUIN COUNTY <br /> <br /> <br />groundwater quality. Constituents of concern that have the potential to degrade groundwater <br />at the land application area include nitrogen, iron and manganese as discussed below: <br />a. For nutrients such as nitrate, the potential for degradation depends not only on the <br />character of the waste, but on loading rates, crop uptake and the ability of the vadose <br />zone below the land application area to provide an environment conductive to <br />nitrification and denitrification to convert the excess nitrogen to nitrate and the nitrate <br />to nitrogen gas before it reaches the water table. This Order requires that the <br />measured total nitrogen concentration in soil not increase on an annual basis (over a <br />waste application/crop growth cycle). Therefore, no degradation is expected to occur <br />and this Order does not allow nitrate degradation of shallow groundwater. <br />b. For metals such as iron and manganese, the waste is not expected to contain <br />significant concentrations. However, as noted above, excessive BOD loading rates <br />can deplete oxygen, resulting in anoxic conditions that can solubilize naturally <br />occurring metals in the soil. Based on the depth of shallow groundwater and BMPs <br />that this Order requires, degradation of shallow groundwater with metals due to <br />reducing conditions is not expected to occur and this Order does not allow <br />degradation of groundwater with metals. <br />88. This Order establishes operational requirements, nutrient loading rate limits and groundwater <br />limitations for the land application area that will not unreasonably threaten present and <br />anticipated beneficial uses or result in groundwater quality that exceeds water quality <br />objectives set forth in the Basin Plan. The discharge does not pose a threat of degradation <br />and the requirements of this Order do not allow any degradation to occur. <br />89. Title 27 of the California Code of Regulations (hereafter Title 27) contains regulatory <br />requirements for the treatment, storage, processing and disposal of solid waste. However, <br />Title 27 exempts certain activities from its provisions. Cannery waste discharges that comply <br />with this Order are exempt from Title 27 pursuant to provisions that exempt domestic <br />sewage, wastewater and reuse. The exemption referred to in this Order is specifically limited <br />to those cannery wastes described in Finding 31 above. Title 27, section 20090 states in <br />part: …“The following activities shall be exempt from the SWRCB-promulgated provisions of <br />this subdivision, so long as the activity meets, and continues to meet, all preconditions <br />listed:” <br />“(f) Soil Amendments – Use of nonhazardous decomposable waste as a soil amendment <br />pursuant to applicable best management practices, provided that RWQCBs may issue <br />waste discharge or reclamation requirements for such use.” <br />90. Therefore, the land application of cannery wastes authorized herein is exempt from the <br />requirements of Title 27 because the cannery wastes are a nonhazardous decomposable <br />waste and will be used as a soil amendment using best management practices.