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12.1.5. The extraction of the shallow groundwater through dewatering wells, <br /> when necessary to suppress the water table, shall be reviewed on an <br /> individual basis with prior approval by the Director. <br /> 12.1.6. To prohibit intermingling of poor quality aquifers above and below the <br /> Corcoran Clay layer, wells constructed and perforated below the <br /> Corcoran Clay layer shall have sealing requirements determined on a site <br /> specific basis and approved by the Director. <br /> 13. MONITORING WELLS <br /> 13.1. APPLICATION TO WELL TYPE <br /> 13.1.1. These standards apply to all types of monitoring wells, except as <br /> prescribed in Section 13.2 that follow. Before a change in use of a well is <br /> made, standards for the new use shall be complied with. <br /> 13.2. EXEMPTIONS FOR UNUSUAL CONDITIONS <br /> 13.2.1. Under certain circumstances the Director may waive compliance with <br /> these standards and prescribe alternate requirements. These standards <br /> may be waived only where they are impractical or ineffective because of <br /> unusual conditions, or would result in an unsatisfactory well condition or <br /> function. In waiving these standards EHD shall, if possible, require that <br /> measures be implemented to provide the same or greater level of water <br /> quality protection than would otherwise be provided by these standards. <br /> 13.3. PERMITS <br /> A permit application for monitoring, exploration holes (borings), extraction wells, <br /> injection wells, vapor probe, or other wells covered by this Section is required. <br /> 13.3.1. The licensed well contractor, or his authorized representative, shall make <br /> application on forms furnished by the San Joaquin County Environmental <br /> Health Department. The application shall contain the following <br /> information and a plot plan drawn to scale. <br /> 13.3.1.1. Owner's name and address. <br /> 13.3.1.2. Address of parcel and Assessor's parcel number (APN). <br /> 13.3.1.3. Names of streets or roads nearest to, or bounding the property. <br /> 13.3.1.4. Outline of the property giving dimensions and North Direction. <br /> 13.3.1.5. Location of facility sewer outlet, public sewer, sewage disposal <br /> system or proposed sewage disposal system, proposed <br /> expansion of sewage disposal system, or any other possible <br /> source of contamination. <br /> 13.3.1.6. Location of proposed new well, other existing wells and sewage <br /> disposal systems within a radius of 100 feet on the property or <br /> adjoining property. <br /> EHD 43-03 Page 20 of 27 WELL STANDARDS <br /> 10/9/07 <br />