ISDS 



c) copy of USGS quad sheet identifying location of site with respect to water supply 

 watersheds, coastal watersheds, sole source aquifers, or other designated critical 

 areas; 



d) copy of preliminary plan identifying proposed location of ISDS, leachfield 

 footprint, and alternative site, showing required 200 foot separation distance to 

 wetlands; and 



e) copy of preliminary plan identifying proposed location of any subdrains to be 

 installed, if subdrains are permitted in the location at issue. 



**Modify freshwater wetlands regulations to ensure that ISDS and 

 wetlands regulations are consistent with respect to required setbacks from 

 wetlands and waterbodies, and that strictest provisions of both programs 

 are applied to one another. Setbacks must ensure that slope and soil conditions of the 

 setback zone, in addition to separation, are considered in establishing a buffer which is 

 adequate to protect wetiand resources. 



**A minimum buffer of 100 feet fham the point of subdrain discharge to any surface water 

 body or wetiand must be provided. Such buffers must provide adequate effluent o-eatment 

 via approved mechanisms, including overland flow, infiltration or vegetated channel 

 passage. Buffers must meet applicable requirements of revised ISDS regulations, CRMC, 

 and local drainage control requirements, whichever is most stringent 



***To the extent possible, process ISDS and wetland permit applications 

 jointly, so that anticipated ISDS location can be evaluated at the time of the 

 initial Wetlands site visit, and/or potential wetlands issues can be noted 

 during an initial ISDS site survey or application review. Applications should 

 be processed with the same reference file number, with duplicate copies of relevant material 

 circulated to Wedands, ISDS, and Groundwater Sections. 



***Coordinate with ISDS section to ensure that Freshwater Wedands section is notified in 

 cases where existence of wedands requires that applicant obtain a Freshwater Wetiand 

 Permit before applying for ISDS approval. Notify all such applicants of the Freshwater 

 Wedands approval requirement. 



RECOMMENDATIONS TO DEM GROUNDWATER SECTION 



♦♦♦Work with other DEM sections and outside experts to develop an 

 effective regulatory and management strategy for package plants. 



♦Amend appropriate groundwater regulations to support ISDS Task Force 

 recommendations. 



**Develop a comprehensive monitoring program capable of identifying existing and 

 potential problems related to ISDS. In order to channel resources effectively, establish a 

 groundwater monitoring protocol giving monitoring priority to areas having highly 

 vulnerable soil conditions. 



**Based upon the established protocol, determine the degree to which all resource areas are 

 compromised or potentially compromised by ISDS related contaminants. 



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