12 Va. Admin. Code § 5-462-300
Test kits for the measurement of all required chemistry parameters in this chapter shall be provided and maintained at each public swimming pool. The test kits shall be capable of measuring the disinfectant residuals accurately to within 0.5 ppm.
§§ 32.1-12 and 32.1-248.1 of the Code of Virginia.
Derived from VR355-35-700 § 4.3, Virginia Register Volume 10, Issue 20, eff. August 1, 1994.