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Stockton Delta Water Supply Project WTP <br /> Well Demolition and Sanitary System Approval <br /> August 20,2010 Page 2 <br /> Irrigation Well <br /> This is an old 12"well believed to have been used for irrigation. We have not found logs or other records of <br /> this well. It has been measured to be 97 feet deep below the existing ground surface. <br /> Domestic Well <br /> This is an old 6"well believed to have been used for domestic water supply for an old farm house that used to <br /> exist at the site. We have not found logs or other records of this well. It has been measured to be 165 feet <br /> deep below the existing ground surface. <br /> Sanitary System, Septic Tank and Leachfield <br /> An on-site septic tank and leachfield system is being provided to handle standard sanitary waste streams from <br /> the WTP buildings. These standard waste streams from the Administration/Operations Building, <br /> Maintenance Shop,and Membrane Filtration Building drain by gravity to the wetwell of the Sanitary Sewer <br /> Lift Station. The wastewater is then pumped through a 4-inch force main to the septic tanks. Floor drains in <br /> the Ozone Building drain by gravity to a sump in the building;wastewater is then pumped through a 2-inch <br /> force main to the septic tanks. The table below provides an inventory of all waste stream sources at the WTP <br /> that are being directed to the septic tank and leachfield system. <br /> Wastewater• <br /> urces <br /> Ozone Building Floor drains may occasionally collect potable water <br /> drained from equipment, otherwise only occasional <br /> washdown water. There are no sinks, toilets, or <br /> other sanitary sources in this building. <br /> Maintenance Shop Hand Sink Floor drains are routed through an oil/water <br /> Mop Sink separator before draining to the Sanitary Sewer Lift <br /> Toilet Station in case of any incidental drips or spills. <br /> Floor Drains <br /> embrane Filtration Floor Drains Air compressor is oil-free type; condensate volume <br /> ilding Oil-free Air is small. Floor drains are expected to collect only <br /> Compressor occasional washdown water. <br /> Condensate <br /> Administration/ Drinking Fountains Boiler condensate drain is routed through a <br /> Operations Building Floor Drains standard neutralization tank. <br /> Hand Sinks Lab sink is also routed through a neutralization tank <br /> Mop Sink to cover the possibility of accidental disposal of <br /> Toilets small amounts of laboratory reagents. <br /> Showers <br /> Kitchen Sink <br /> Dishwasher <br /> Boiler Condensate <br /> Lab sink <br /> CDMA <br />