In NH prior to executing a purchase and sale agreement for any “developed waterfront property” using a septic disposal system, an owner shall, at his expense, engage a permitted subsurface sewer or waste disposal system designer to perform an on-site assessment study.
NH DES Provides a list of water bodies here: https://www.des.nh.gov/organization/divisions/water/wetlands/cspa/water_bodies.htm
We can complete the assessment for your property transaction and provide the documentation that goes along with the assessment findings. The form does not go to the NH DES, it actually is transferred from seller to buyer and becomes part of the Purchase and Sales Agreement.
2018 Fact Sheet WD-SSB 10
Selling Developed Waterfront Property: Site Assessment Study Required