03/10/2004 ZONING BOARD OF APPEALS Minutes

Home Browse Search

Southside Realty Trust Engineering Review Page two B. A copy of Land Court Plan 36192B is included in this section and shows the location of the existing Lettie Lane. Will it be necessary to prepare a new land court plan that eliminates the road layout so the court can grant that new separate certificates of title? Section 5: A. Page 5 of the McShane Construction Co. Building Specifications (Landscaping) indicates that driveways will be constructed with 3/8" to '/" bluestone and that all other disturbed areas except 1000 square feet of lawn will be treated with wood chips. This type of treatment will not prevent erosion on severe slopes. Much of the site is to be regraded and stripped of existing vegetation. Maintenance and potential clogging of storm drains may become a problem. II. Storm Water Management and Drainage Narrative and Wastewater Treatment System Narrative A. The document should be stamped by the professional who prepared it. B. 1. Page 1: The first paragraph indicates that most of the site is in a Zone II of a wellhead protection area. A calculation was performed to check the maximum allowable sewage disposal flow for the site. Title 5 requires that the loading rate for on site sewage disposal within a Zone II shall be limited to 440 gallons per acre per day unless the system includes enhanced nitrogen removal. Ref: 310 CMR 15.214, 15.215 (Title 5). 9.3 acres would allow a total of 5115 gallons of disposal a day using enhanced nitrogen removal but only 4094 gallons per day with conventional disposal. The Zoning Board of Appeals may wish to confirm with the Board of Health that enhanced nitrogen removal is a part of the total 1 system for the project for the number of housing and commercial units that are proposed. C. Storm Water Drainage Design: 1. The drainage design narrative discusses the capture of the first 1" of rainfall for treatment and compliance with water quality regulations. It also indicates that calculations have been done for the 2-year, 10-year and 100-year storm events. This is consistent with accepted practice using the DEP Stormwater Regulations as guidance. 2. Best management practices of open channel swales, bioretention facilities, infiltration and drainage piping are all used within the development to attenuate storm water runoff. 3. Page 3 of the report includes a statement about the four separate bioretention areas that are to be implemented in the northern section of the development. That same page shows schematic diagrams as to how these areas would be constructed in a general manner. It also states that the overflow for the 100-year storm is to be handled by small weir structures, however there is no indication of where these small structures are or what they drain to. More specific detail is required for this very important project feature. 4. Page 5 suggests in the fourth paragraph from the bottom of the page that "Appropriate stormwater practices have been selected for sensitive areas and the design incorporates provisions for