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WASTE DISCHARGE REQUIREMENTS ORDER R5-2012-0103 - 17 - <br />CONSTELLATION BRANDS U.S. OPERATIONS, INC. dba WOODBRIDGE WINERY <br />WOODBRIDGE WINERY <br />SAN JOAQUIN COUNTY <br /> <br />Groundwater monitoring data obtained since 2001 indicate that the ponds and land <br />application areas, as well as a historic former stillage pond, have caused increases in <br />concentrations of TDS, sulfate, chloride, sodium, and nitrogen compounds in <br />groundwater. <br />49. LAAs P and Q are currently not equipped with groundwater monitoring wells. <br />Additional wells are required at LAAs P and Q when those areas are included as part <br />of the facility wastewater treatment and discharge program. <br />POTENTIAL CONDUIT EVALUATION <br />50. Several production and irrigation wells are currently used or exist at the facility. <br />Because these wells draw from several aquifer zones, an industrial/irrigation well <br />survey was performed to investigate whether there is a potential for individual wells to <br />act as vertical conduits allowing groundwater from different water-bearing intervals to <br />mix. Four production wells (PW -1, PW -2, PW -3, and PW -4), five irrigation wells (IW -1, <br />IW -2, IW -3, IW -4 and IW-5), and a previously undocumented well (Well X) were <br />investigated in the survey. Well conditions were reported in a Potential Conduit <br />Report, dated 30 April 2009. As a result of the investigation, IW -4 and IW-5 were <br />destroyed in March 2009 and IW -1 was abandoned in July 2009. A summary of the <br />available well construction information for the remaining wells is presented below: <br />Well <br />Installation <br />Date <br />Borehole <br />Depth <br />(ft. bgs) <br />Casing <br />Depth <br />(ft. bgs) <br />Screened <br />Depths <br />(ft. bgs) Comments <br />PW -1 1955 450 0 - 373 NA No screened interval, open <br />borehole below casing <br />PW -2 Unknown 1201 0 - 1031 67, 72, and <br />84 <br />Pump in well prevented <br />investigation below 113 ft. bgs. <br />PW -3 Unknown 337 0 - 337 60-80 <br />100-120 <br />164-184 <br />208-228 <br />291-311 <br />Open borehole 311-337 ft. bgs. <br />Well casing condition poor (as <br />noted during video log). <br />PW -4 2001 700 0 - 500 320-440 Open borehole 500-700 ft. bgs. <br />Well X Unknown 395 Unknown Unknown Casing collapse prevented <br />investigation. <br />IW -2 Unknown 477 0 - 337 265-268 Open borehole 337-477 ft. bgs. <br /> <br />IW -3 Unknown 175 0 - 135 Not <br />Applicable <br />Open borehole 135-175 ft. bgs. <br />1 Suspected, but unconfirmed due to lack of well log or conditions encountered during video log. <br />51. Production wells PW -1, PW -2 and Well X are located in close proximity to each other <br />in the north-central portion of the winery facility. An additional production well (PW-3) <br />is located in the east-central portion of the winery facility, downgradient of a former <br />stillage pond. Notable observations about well conditions and potential vertical conduit <br />conditions for wastewater constituent migration are discussed below: