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City of Lathrop <br /> Master Groundwater Well Installation and/or Destruction <br /> Workplan (Revised) <br /> Permit No. R5-2006-0094 <br /> ' 1.0 GENERAL INFORMATION <br /> 1.1 Background <br /> ' The City of Lathrop's Wastewater Recycling Plant (WRP) treats and disposes <br /> domestic wastewater generated in existing and planned residential and <br /> ' commercial developments within the City of Lathrop. The WRP is regulated <br /> under Waste Discharge Requirements and Master Reclamation Permit (WDRs) <br /> Order No. R5-2006-0094. The City of Lathrop is named as the Discharger, and <br /> ' the WDRs apply to existing and proposed treatment capacity expansions. <br /> As part of Lathrop's WRP operations, recycled water is stored in lined storage <br /> ponds and applied to land application areas. Land application areas consist of <br /> landscaped areas, turf areas, agricultural crop areas, and in the future may <br /> include infiltration basins. As the need to expand treatment capacity develops, <br /> ' the WDRs allow for flexibility in changing the size and use of land areas for <br /> recycled water storage or land application. <br /> ' The WDRs require that prior to authorization of new land application areas, <br /> groundwater analyses must be presented in Recycled Water Expansion Report <br /> submittals (RWERs). Because the existing approved groundwater monitoring <br /> ' network may not be adequate to evaluate groundwater conditions at all future <br /> recycled water storage pond and land application sites, it likely will be <br /> appropriate to install additional monitoring wells. <br /> ' 1.2 Purpose <br /> ' Additional monitoring wells likely will be needed to evaluate groundwater <br /> conditions prior to authorization of new land application areas. Provision G.1.i(i) <br /> of the WDRs requires that prior to the first scheduled construction or destruction <br /> ' of any groundwater monitoring well, a Master Groundwater Well Installation <br /> andlor Destruction Workplan (Master Well Workplan) shall be submitted to the <br /> Regional Water Quality Control Board (RWQCB). The purpose of the Master <br /> ' Well Workplan is to direct monitoring well installation and destruction activities <br /> required for future RWERs submitted by the City of Lathrop. <br /> ' - 1 - <br />