SITE INFORMATION AND CORRESPONDENCE

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TECHNICAL INFORMATION REQUIREMENTS Page 7 of 12 FOR A REPORT OF WASTE DISCHARGE during wet season. d. Shallow groundwater quality for typical waste constituents, up/down gradient. (See Table 1 e. Information on monitoring well locations, construction details, and locations of any . geological features (e.g. aquitards, subterranean channels, faults) and aquifer characteristics. f. Summary of historical groundwater monitoring results (last 5 years for existing facilities, 2 years for new/planned facilities). E. Antidegradation Analysis The State Water Resources Control Board Resolution No. 68-16 (the Antidegradation Policy) requires that the Central Valley Water Board maintain the high quality of waters of the state until A is demonstrated that any change in quality will be consistent with maximum benefit to the people of the state, will not unreasonably affect beneficial uses, and will not result in exceedances of one or more water quality objectives. If a discharge will degrade groundwater quality but will not cause an exceedance of one or more water quality objectives, the discharger must demonstrate that all practicable treatment or control measures have been implemented or will be implemented such that the Board can consider these measures to represent the 'best practicable treatment or control" (BPTC) of the constituents of concern. Demonstrating that BPTC has been, or will be, implemented at the site can provide justification for the Board to allow the current level of degradation to continue or increase (as applicable), or for the Board to allow any degradation in the case of a new discharge. The Antidegradation Policy is incorporated into our Basin Plans, which also include implementation plans that we follow. See the following link for the Basin Plans and other important policy documents: hftp://www.waterboards.ca..qov/centralvallev/`plans policies/ The Antidegradation Analysis must include the following: 1. For existing facilities, whether the discharge has caused degradation. If so, for which constituents, to what degree, and whether the discharge has caused exceedance of a water quality objective. 2. The potential for the discharge to degrade groundwater quality (for new discharges) or further degrade groundwater quality (for existing discharges, whether or not the discharge is expanding). The assessment must be made based on site-specific data and shall include the following items for each constituent listed in the effluent category on Table 1: a. Characterization of all waste constituents to be discharged that have the potential to degrade groundwater quality; b. Characterization of shallow groundwater quality (i.e., the uppermost layer of the uppermost aquifer)for typical waste constituents' upgradient and down adient of the site and 5 Include analyses for the following: total coliform organisms, total dissolved solids, fixed dissolved solids, electrical conductivity, nitrate nitrogen, total nitrogen, and major anions and cations.