12 Va. Admin. Code § 5-610-670
Subsurface soil absorption systems shall be designed on the basis of the sewage flows tabulated in Table 5.1.
| Table 5.1. Sewage Flows. | ||||||
| Discharge Facility | Design Unit | Flow (gpd) | BOD (#/day) | S.S. (#/day) | Flow Duration (Hour) | |
| Dwelling1 | per person total | 75 | 0.2 | 0.2 | 24 | |
| Food preparation | -- | 15 | -- | -- | -- | |
| Toilet facilities | -- | 20 | -- | -- | -- | |
| Bathing facilities | -- | 20 | -- | -- | -- | |
| Handwashing facilities | -- | 5 | -- | -- | -- | |
| Laundering | -- | 15 | -- | -- | -- | |
| Schools with shower and cafeteria | per person | 16 | 0.04 | 0.04 | 8 | |
| Schools without showers and with or without cafeteria | per person | 10 | 0.025 | 0.025 | 8 | |
| Boarding schools | per person | 75 | 0.2 | 0.2 | 16 | |
| Motels at 65 gals/ person (rooms only) | per person | 130 | 0.26 | 0.26 | 24 | |
| Trailer courts | per person | 75 | 0.2 | 0.2 | 24 | |
| Restaurants | per seat | 50 | 0.2 | 0.2 | 16 | |
| Interstate or through highway restaurants | per seat | 100-180 | 0.7 | 0.7 | 16 | |
| Interstate rest areas | per person | 5 | 0.01 | 0.01 | 24 | |
| Service stations | per vehicle served | 10 | 0.01 | 0.01 | 16 | |
| Factories & office buildings | per person per 8-hr shift | 15-35 | 0.03-0.07 | 0.03-0.07 | operating period | |
| Shopping centers | per 1,000 ft. of ultimate floor space | 200-300 | 0.1 | 0.1 | 12 | |
| Hospitals | per bed | 300 | 0.6 | 0.6 | 24 | |
| Nursing homes | per bed | 200 | 0.3 | 0.3 | 24 | |
| Homes for the aged | per bed | 100 | 0.2 | 0.2 | 24 | |
| Doctor's office in medical center | per 1,000 sq. ft. | 500 | 0.1 | 0.1 | 12 | |
| Laundromats, 9 to 12# machines | per machine | 500 | 0.3 | 0.03 | 16 | |
| Community colleges | per student and faculty | 15 | 0.03 | 0.03 | 12 | |
| Swimming pools | per swimmer | 10 | 0.001 | 0.001 | 12 | |
| Theaters, drive-in type | per car | 5 | 0.01 | 0.01 | 4 | |
| Theaters, auditorium type | per seat | 5 | 0.01 | 0.01 | 12 | |
| Picnic areas | per person | 5 | 0.01 | 0.01 | 12 | |
| Camps, resort day and night with limited plumbing | per campsite | 50 | 0.05 | 0.05 | 24 | |
| Luxury camps with flush toilets | per campsite | 100 | 0.1 | 0.1 | 24 | |
| Dump station | per campsite | 50 | 0.05 | 0.05 | 24 | |
| 1 For all dwelling units the design shall be based on two persons per bedroom. |
§§ 32.1-12 and 32.1-164 of the Code of Virginia.
Derived from VR355-34-02 § 4.2, eff. February 5, 1986; amended, Virginia Register Volume 4, Issue 14, eff. May 11, 1988; Volume 16, Issue 16, eff. July 1, 2000.