Section Env-Or 407.06 - UST System Design Requirements(a) All UST systems shall meet the requirements for new facilities specified in Env-Or 405 and the applicable reference standards listed in Env-Or 403.(b) A UST system shall not be installed within the sanitary protective area of a public water system (PWS) well.(c) A UST system that already exists within the sanitary protective area of a PWS well shall not be substantially modified or replaced unless: (1) The PWS owner agrees to the work in writing; or(2) The department determines that the modified UST system: a. Would not create any additional threat to the PWS well; orb. Would be more protective of groundwater from which the PWS well draws than the existing UST system.(d) A UST system shall not be installed in any area where flooding over the top of the tank is reasonably likely or the ground surface is below the 100-year flood elevation, unless the plans include specific requirements designed to ensure that the tank will not float and its contents will not escape during a flood.(e) At any new UST site at which installation of a UST system is proposed on or after February 2, 2005, no UST system shall be installed closer than the applicable distance specified in Table 407-1: Table 407-1: Minimum Distance from UST System to Water Supply Wells
Contents of UST | Public Water Supply Well | Non-Public Water Supply Well |
Gasoline | at least 500 feet | at least 250 feet |
All other regulated substances | at least 400 feet | at least 75 feet |
(f) At any UST facility existing prior to September 1, 2013, if: (1) A UST system that will have the same contents is added, substantially modified, or replaced, the existing separation distance shall not be decreased below the separation distance specified in table 407-1; and(2) If a UST system installed on or after the 2018 effective date of this chapter will contain a regulated substance not previously stored at the facility, the UST system shall not be installed closer than the applicable distance specified in table 407-1.(g) With the exception of marinas and construction that is subject to Env-Or 407.10 relative to installation of fueling systems over surface waters, no UST system at any new site shall be located closer than 75 feet from surface waters of the state.(h) Storm water runoff from UST facilities shall not be: (1) Directly discharged to surface water unless a permit for the discharge is obtained under applicable state or federal law; or(2) Discharged below the ground surface unless a permit is obtained under RSA 485-A:13, I(a) and Env-Wq 402.(i) Storm water shall not be directed to flow over any tank pad or dispensing pad.(j) A UST shall be installed such that it has a buoyancy safety factor of at least 1.2 during high groundwater conditions.(k) Regulated substance shall not be used as ballast for new tank installations.N.H. Admin. Code § Env-Or 407.06
(See Revision Note at chapter heading for Env-Or 400) #10393, eff 9-1-13
Amended by Volume XXXVIII Number 45, Filed November 8, 2018, Proposed by #12643, Effective 10/10/2018, Expires 10/10/2028.