N.H. Admin. Code § Env-Wq 1504.13

Current through Register No. 44, October 31, 2024

Section Env-Wq 1504.13 - Infiltration Feasibility Report

The infiltration feasibility report required by Env-Wq 1503.08(f)(3) shall contain the following:

(a) The location of the practice;

(b) A description of the existing topography at the location of the practice;

(c) The locations of the test pits or borings which constitute the following required number of test pits or borings:

(1) At least one test pit in each infiltration basin area of less than 2,500 square feet;

(2) At least 2 test pits in each infiltration basin area of 2,500 square feet or greater, with an additional one test pit or boring in every 10,000 square feet of infiltration basin area; or

(3) At least one test pit in each infiltration trench with an additional one test pit or boring in every 100 linear feet of trench;

(d) The elevation of the location of the seasonal high water table (SHWT) and bedrock, if within 5 feet below the base of the practice, as observed and described by a certified soil scientist or an individual holding a valid permit as a permitted designer as issued by the department's subsurface systems bureau;

(e) Profile descriptions written in accordance with the descriptive procedures, terminology, and interpretations found in the Field Book for Describing and Sampling Soils, Version 3.0, NRCS, 2012, available as noted in Appendix B;

(f) A plan showing the soil series for the soils at the location of the proposed practice and within 100 feet of the area's perimeter, in accordance with SSSNNE Special Publication No. 3, Version 7.0, Site-Specific Soil Mapping Standards for New Hampshire and Vermont, July 2021, available as noted in Appendix B;

(g) The number and location of test locations, as specified in Env-1504.14(f), and the number of repetitions at each testing location;

(h) The date(s) on which data was collected;

(i) A summary of the design infiltration rate results as determined from Env-Wq 1504.14;

(j) Data sheets for measurements obtained in accordance with the method described in Env-Wq 1504.14(e) that is implemented; and

(k) If the design infiltration rate is for proposed fill soils, the data obtained using the method described in Env-Wq 1504.14(g).

N.H. Admin. Code § Env-Wq 1504.13

(See Revision Note #1 at chapter heading for Env-Wq 1500) #9343, eff 1-1-09; (See Revision Note #2 at chapter heading for Env-Wq 1500) amd by #9817-A, eff 12-1-10 (formerly Env-Wq 1504.12)

Amended by Volume XXXVII Number 32, Filed August 10, 2017, Proposed by #12342, Effective 8/15/2017, Expires 8/15/2027.

Amended by Volume XLII Number 2, Filed January 13, 2022, Proposed by #13317, Effective 12/22/2021, Expires 12/22/2031.

Amended by Number 41, Filed October 12, 2023, Proposed by #13758, Effective 9/28/2023, Expires 9/28/2033 (formerly Env-Wq 1504.16) (see Revision Note #4 at chapter heading for Env-Wq 1500).