Module 2 Footnotes

   1 15.410: Variances - Standard of review

(1) Local approving authorities and the Department may vary the application of any provisions of 310 CMR 15.000 with respect to any particular case except those listed in 310 CMR 15.415. Variances shall be granted only when, in the opinion of the approving authority:

(a) The person requesting a variance has established that enforcement of the provision of 310 CMR 15.000 from which a variance is sought would be manifestly unjust, considering all the relevant facts and circumstances of the individual case; and

(b) The person requesting a variance has established that a level of environmental protection that is at least equivalent to that provided under 310 CMR 15.000 can be achieved without strict application of the provision of 310 CMR 15.000 from which a variance is sought. (emphasis added)

   2 Two notable organisms in this regard are Nitrosomonas and Nitrobacter that convert ammonia to nitrate.

   3 Section 15.253(1)(a) Effective Depth - pits, galleries, or chambers & 15.251(1)(c) Effective Depth - Trenches

   4 Section 15.221 General Construction Requirements for all System Components

   5 Loading Rate refers to the amount of effluent (gallons) discharged to the soil per given area of soil interface (in square feet). For example, under the 1978 Title 5, the loading rate was 2.5 gallons/square foot/day of sidewall leaching area in sandy soils. This loading rate was reduced to 0.74 gallons/square foot/day under the revised code.

   6 A system that distributes septic tank effluent passively by gravity as opposed to a dosed system or pressure-dosed system (SEE MODULE 1)

   7 Section 15.254 (c)

   8 Yates, Marylynn V., and Scott R. Yates. 1988. Modelling Microbial Fate in the Subsurface Environment. 1988. CRC Critical Reviews in Environmental Control. Vol 17(4):307-340.

   9 The actual graph contained the negative logarithm of the removal rate in numbers/centimeter of passage vs. the logarithm of the application rate in centimeters/day.

   10 EPA Document entitled "Septic Tank Siting to Minimize the Contamination of Ground Water by Microorganisms" - Office of Ground-Water Protection, Washington DC 20460.

   11 Vaughn, James M., E. Landry, and T.Z. McHarrell. 1983. Entrainment of Viruses from Septic Tank Leach Fields Through a Shallow, Sandy Soil Aquifer. Applied and Environmental Microbiology Vol 45(5):1474-1480,

   12 Section 15.002 Definitions

   13 Technical Evaluation of Title 5 The State Environmental Code 310 CMR 15.00 Prepared by Defeo, Wait & Associates, Inc. March 1991. pages 79-80.

   14 The figure was adapted from Cape Cod and the Islands The Geologic Story by Robert N. Oldale. 1992. Parnassus Imprints, East Orleans, Massachusetts

   15 Section 15.103 (3)(c)2. .....if the location of the system is within 300 feet of mean high water of the ocean, monitoring the high groundwater elevation over a tidal cycle during a full moon high tide.

   16 Section 15.002 Definitions

   17 Section 15.255: Construction in Fill

   18 Section 15.405: Contents of a Local Upgrade Approval (1)i the local approving authority may reduce the required four foot separation (in soils with a recorded percolation rate of more than two minutes per inch) or the required five foot separation (in soils with a recorded percolation rate of two minutes or less per inch) between the bottom of the soil absorption system and the high groundwater elevation only if all of the following conditions are met:...1-4...
    ......5. No reduction in required leaching field size or setbacks from public or private wells, bordering vegetated wetlands, surface waters, salt marshes, coastal banks, certified vernal pools, water supply lines, surface water supplies or tributaries to surface water supplies, or drains which discharge to surface water supplies or their tributaries, is allowed.