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2.0 ENVIRONMENTAL CHECHI.IST disruptors). These compounds can pass through the body unmetabolized or partially metabolized, and can be present in domestic wastewater in the range of a few parts per billion to a few parts per trillion. These and other compounds are collectively known within the water industry as "emerging contaminants," and are not presently regulated at the federal, state or local level, although their environmental fate, transport, and health effects are the subject of on-going research. Current treatment methods (including physical, chemical and biological processes) at the WPCP remove a Iarge percentage of these compounds from the wastewater. These compounds may be present in the recycled water but at minute concentrations, near or below current analytical detection limits. The presence of trace amounts of these compounds in the recycled water would not adversely affect landscape irrigation or any other proposed uses of the recycled water within the Project area. Natural processes, such as biological and photo-degradation at or below the ground surface would further break down residual contamination. Residual traces of chemicals, if any would not adversely affect groundwater quality. During irrigation, recycled water is applied to landscaped areas only to meet the evapotranspiration requirements, and would not produce surface runoff or percolate through the soil to groundwater. The use and application of recycled water would follow the Guidelines for Use of Reclaimed Water (DHS, 1988}. It is unlikely that the minute quantities of these compounds, if present, could migrate through the soil and into groundwater during the wet weather season, and then subsequently migrate to the near- shore waters of San Francisco Bay or the surrounding baylands. If this migration were to occur, the concentrations would be extremely low, if even detectable, and would likely be comparable to existing background levels in the bay water. Adherence of the Project to all appropriate Title 22 requirements (Measure WQ-2) would assure that potential impacts to water quality or public health would be reduced to a less-than-significant level. b) The City receives potable drinking water from the East Bay Municipal Utility District (EBMUD) and City-owned groundwater wells. The Monarch Bay Golf Complex currently irrigates with potable water and groundwater pumped from a single onsite well. Use of secondary-23 recycled water would alleviate a portion of the demand placed upon the local aquifer, thereby preserving the aquifer for other uses. Therefore, potential impacts to groundwater are considered beneficial. c,d,e) The proposed pipelines would be installed within existing levees and roadways. There are no waterways designated as a Wild and Scenic River in the Project area. Ground cover or surface pavement above installed pipelines would be restored after construction is completed. The Monarch Bay Golf Complex, the water recycling plant proposed dimensions will be approximately 20 feet by 20 feet. Upgrades at the San Leandro WPCP (a second disinfection and filtration plant plus piping installation) will occur in areas that are currently paved. Therefore, the installation of the proposed pipelines, wastewater treatment plant upgrades, and water recycling plant would not substantially alter the existing drainage patterns in the Project vicinity because of the relatively small net increase impermeable surfaces that would result from of Project implementation and with the restoration of disturbed landscape areas. Storm drainage conditions would not be expected to change. The Project would thus have no significant impact on downstream flood conditions. f) Construction. Without mitigation, earthmoving activities associated with pipeline construction could contribute to soil erosion and a subsequent degradation in water quality. Implementation of standard erosion control techniques during Project construction activities (see Measure WQ-1) would reduce the potential water quality impacts to ales-than-significant level. A formal Storm Water Pollution Prevention Plan (SWPPP) would be required for construction activities. The City would be required to apply for coverage under the SWRCB's General Construction NPDES San Lcandro Recycled Water Project 2.-32 ESA ! 7A3193 Draft IS/MND