Total Determination of Streams and Nitrogen Stacking and Program Overhaul Section 1

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Total Determination of Flows and Nitrogen Loading and Program Update Part 1

Nitrogen Aggregation Loading Plan Goals Regulatory prerequisites Permitting process Case Study MassDEP's Guidelines for Title 5 Aggregation of Flows and Nitrogen Loading , dated 7/01/98

Regulatory Requirements 310 CMR 15.214: No framework serving new development in Nitrogen Sensitive Areas … should be intended to get or might get more than 440 gallons of outline stream every day per section of land. No framework served by both a well and septic framework might get more than 440 gallons of outline stream every day per section of land. (a.k.a. "private well regions").

Do Nitrogen Loading Limitations Apply*? Between time Wellhead Protection Areas Zone II of Public Water Supply Well Nitrogen Sensitive Embayments or different territories as assigned Areas served by both on location septic frameworks and drinking water supply wells * Refer to 310 CMR 15.214 and 15.215

Interim Wellhead Protection Areas (IWPA) A defensive sweep around general society water supply well, commonly based upon the pumping rate of the well.

IWPA

Zone II A Zone II is a region of an aquifer which contributes water to a well under the most serious pumping and energize conditions.

Zone II

What do we mean by 440 gpd/section of land? Outline stream/real esatate of office Acre = 40,000 sf (310 CMR 15.002) Easy dependable guidelines for private ventures: 1 room needs 10,000 sf 2 rooms require 20,000 sf Etc. More convoluted for non-private activities

Basic Example of N-Loading

Nitrogen Loading Aggregation Plan Provides for adaptability in meeting the 440 gpd/section of land equivalency. Acquire credit land to meet the 440 gpd/section of land stacking Clustered subdivision with regular space as credit land Easement on a package in same NSA

Using Credit Land

Nitrogen Loading Plans Community Aggregation Plan Facility Aggregation Plan

Facility Aggregation Plan A report that confines the stream (measure of rooms) on the Facility Land A record that limits the presentation of nitrogen and advances energize on the Credit Land.

Facility Aggregation Plan Illustrated 29-parcel proposed subdivision served by on location septic and wells Part of the venture is in a Zone II

Undeveloped Parcel

Proposed subdivision format

Sensitive Receptors Now Shown Zone II

Start the Analysis Consultant ought to give the accompanying data (or it can be acquired from the Definitive Subdivision Plans): Lot numbers Square footage of every part Number of rooms for every part Describe which parts are inside a nitrogen delicate range and which parcels are definitely not. Square footage of Credit Land and area

Analysis (cont.) All parts inside subdivision are served by private wells and septic frameworks. Some of them are inside the Zone II. All parts should all meet the 440 gpd/section of land. The figuring is least demanding when sorted out in an outline.

Chart – Basic Calculation

Credit Land Total Credit Land required = 275,000 sf Must meet certain criteria: Within same NSA as Facility Land Prohibit man-made wellsprings of N Prevent manufactured impenetrable territories Not inside Velocity Zone or Regulatory Floodway recognized by FEMA Not under surface water, however wetlands are satisfactory Not as of now being utilized as Nitrogen Credit Land

Credit Land Lots outside Zone II Lots inside Zone II

Credit Land (cont.) For parcels outside of Zone II: Considered private well zones Credit arrive must be of adequate add up to meet 440 gpd/section of land (for those particular parcels) and be inside a similar subdivision. For parts within Zone II: Considered NSA Credit Land must be of adequate add up to meet 440 gpd/section of land (for those particular parcels) and be inside the Zone II.

Calculation Need 100,000 sf of Credit Land inside the subdivision.

Calculation (cont.) Need 175,000 sf of Credit Land inside Zone II

Final Layout Over 100,000 sf of Credit Land outside of Zone II Over 175,000 sf of Credit Land inside Zone II

Summary - Important Notes Calculate the measure of Credit Land for every last part, not simply utilizing the entirety of Facility Land. Continuously compute utilizing square feet. Ranges inside R.O.W. are not viewed as adequate as Credit Land. Erase all confinement bowls/lakes from Credit Land counts.

The Permit Typically two reports: One record limits the Facility Land to a particular stream (number of rooms). One record limits the Credit Land from any wellsprings of Nitrogen.

Program Updates Part 1

I/A Remedial Use Approvals are right now being altered Applicable to RUAed I/As that give treatment Permits LUA endorsements without MassDEP endorsement under BRPWP64c Look for redesigns on MassDEP's site www.mass.gov/dep

Groundwater Permitting Changes* New 2-section handle Hydro-geo assessment Permitting General Permit <50,000 gpd Not in an IWPA/Zone II Site-Specific Permit Current anticipated timetable Spring 2008 – open hearings Fall 2008 - declaration *Proposed administrative changes . The proposed changes and execution timetable are still draft and subject to change.