The purpose of these standards is provide the Zoning
Enforcement Officer or the parties involved with Site Plan Review the opportunity to review plans for
a lower impact approach to managing stormwater in parking areas. The following information is
therefore required of an applicant choosing to treat any portion of a parking lot with LID stormwater
management techniques. This information shall be prepared by a Massachusetts Registered
Professional Engineer and shall comply with the design and implementation guidelines provided in the
latest version of the Massachusetts DEP Stormwater Management Manual. Where portions of the
parking lot are not using acceptable LID techniques, the standards for Conventional Parking Lot Design
herein shall apply. 1. Delineation of all drainage areas inclusive of areas outside of the parking
envelope that will contribute stormwater runoff to the parking area;
2. Proposed topography at two-foot contour intervals;
3. Site Plan showing drainage pathways and locations of proposed BMPs;
4. Typical profiles of BMPs;
5. Sizing calculations for BMPs that demonstrate adequate conveyance and/or
water quality treatment of the [first half inch of stormwater runoff from
impervious surfaces];
6. Sizing calculations for BMPs that illustrating proposed management of runoff
resulting from 2-year, 10-year, and 100-year event;
7. List of plantings associated with vegetated BMPs;
8. Location of areas reserved for snow storage;
9. Location of any screening between residential and non-residential properties. Buffer zones shall be a minimum of [six (6) feet] in width and shall
substantively screen the site from view through the use of evergreen
vegetation at least six feet in height. Fences may be used as part of screening
but shall not include chain link fences.