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Virginia Administrative Code
Title 9. Environment
Agency 25. State Water Control Board
Chapter 870. Virginia Stormwater Management Program (VSMP) Regulation

9VAC25-870-69. Offsite compliance options.

A. Offsite compliance options that a VSMP authority may allow an operator to use to meet required phosphorus nutrient reductions include the following:

1. Offsite controls utilized in accordance with a comprehensive stormwater management plan adopted pursuant to 9VAC25-870-92 for the local watershed within which a project is located;

2. A locality pollutant loading pro rata share program established pursuant to § 15.2-2243 of the Code of Virginia or similar local funding mechanism;

3. The nonpoint nutrient offset program established pursuant to § 62.1-44.15:35 of the Code of Virginia;

4. Any other offsite options approved by an applicable state agency or state board; and

5. When an operator has additional properties available within the same HUC or upstream HUC that the land-disturbing activity directly discharges to or within the same watershed as determined by the VSMP authority, offsite stormwater management facilities on those properties may be utilized to meet the required phosphorus nutrient reductions from the land-disturbing activity.

B. Notwithstanding subsection A of this section, and pursuant to § 62.1-44.15:35 of the Code of Virginia, operators shall be allowed to utilize offsite options identified in subsection A of this section under any of the following conditions:

1. Less than five acres of land will be disturbed;

2. The post-construction phosphorus control requirement is less than 10 pounds per year; or

3. At least 75% of the required phosphorus nutrient reductions are achieved on-site. If at least 75% of the required phosphorus nutrient reductions cannot be met on-site, and the operator can demonstrate to the satisfaction of the VSMP authority that (i) alternative site designs have been considered that may accommodate on-site best management practices, (ii) on-site best management practices have been considered in alternative site designs to the maximum extent practicable, (iii) appropriate on-site best management practices will be implemented, and (iv) full compliance with postdevelopment nonpoint nutrient runoff compliance requirements cannot practicably be met on-site, then the required phosphorus nutrient reductions may be achieved, in whole or in part, through the use of off-site compliance options.

C. Notwithstanding subsections A and B of this section, offsite options shall not be allowed:

1. Unless the selected offsite option achieves the necessary nutrient reductions prior to the commencement of the operator's land-disturbing activity. In the case of a phased project, the operator may acquire or achieve offsite nutrient reductions prior to the commencement of each phase of land-disturbing activity in an amount sufficient for each phase.

2. In contravention of local water quality-based limitations at the point of discharge that are (i) consistent with the determinations made pursuant to subsection B of § 62.1-44.19:7 of the Code of Virginia, (ii) contained in a municipal separate storm sewer system (MS4) program plan accepted by the department, or (iii) as otherwise may be established or approved by the department.

D. In order to meet the requirements of 9VAC25-870-66, offsite options described in subdivisions 1 and 2 of subsection A of this section may be utilized.

Statutory Authority

§§ 62.1-44.15:25 and 62.1-44.15:28 of the Code of Virginia.

Historical Notes

Former 4VAC50-60-69 derived from Virginia Register Volume 27, Issue 26, eff. September 13, 2011; amended, Virginia Register Volume 29, Issue 4, eff. November 21, 2012; amended and renumbered, Virginia Register Volume 30, Issue 2, eff. October 23, 2013; Volume 38, Issue 25, eff. August 31, 2022.

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