12 Va. Admin. Code § 5-610-710
Separate reserve area or areas meeting the requirements of Part III, Article I of this chapter and equalling 50% of the required absorption area shall be provided where the estimated or measured percolation rate exceeds 45 minutes/inch.
§§ 32.1-12 and 32.1-164 of the Code of Virginia.
Derived from VR355-34-02 § 4.6, eff. February 5, 1986; amended, Virginia Register Volume 4, Issue 14, eff. May 11, 1988.