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19 May 2021 AdvancedGeo <br /> Project No. 21-6435 An Employee-Owned Company <br /> Page 3 of 14 <br /> 3.1. EXISTING ON-SITE SEPTIC TANK USAGE <br /> The existing septic system services the three residential structures (houses) and two <br /> commercial buildings at the property. However, the commercial buildings are currently <br /> vacant. The three residential structures on the property have a total of six (6) bedrooms <br /> and utilizes the existing septic system 365 days a year. The average and reasonable <br /> maximum usage of wastewater for six bedrooms on the property by residents is 100 <br /> gallons per day (gpd) for the first bedroom and 50 gpd for each additional bedroom for a <br /> total of 350 gpd. <br /> The proposed research facility will occupy the 3,000 square foot commercial building and <br /> will be utilized Monday through Friday by a maximum of six (6) employees. <br /> 3.2. SITE SEPTIC PERMIT HISTORY <br /> There are no septic permit records on file at the EHD for the property address. <br /> 3.3. ON-SITE SEPTIC TANK REPAIR HISTORY <br /> There are no septic wastewater repair permits on file at the EHD. <br /> 3.4. EXISTING SEPTIC TANK USAGE IN THE GENERAL AREA <br /> Neighboring properties are zoned for general commercial and residential use. Several <br /> liquid waste permits are on record at the EHD for installation of septic systems <br /> surrounding the subject property. <br /> 3.5. GENERAL AREA SEPTIC PERMIT HISTORY <br /> The following is a summary of information based on new septic system installation permits <br /> currently on file with EHD. <br /> ADDRESS: 26310 Thornton Road <br /> LOCATION: Approximately 220 feet to the northeast <br /> SEPTIC SYSTEM: 1) Permit date May 1997; special permit issued for the installation of <br /> two 35-foot-long leach lines and an 8-foot-wide by 35-foot-long by 4-foot-deep filter bed. <br /> ADDRESS: 26238 Thornton Road <br /> LOCATION: Approximately 96 feet to the northeast <br /> SEPTIC SYSTEM: 1) Permit date February 2008; replacement and destruction of old <br /> tank: 1, 500-gallon sweet septic tank with two compartments, 1,200-gallon sweet grease <br /> trap with two compartments; and a 3.3-foot-wide by 49-foot-long by 3.5-foot-deep filter <br /> bed. <br />