Virginia Administrative Code › Title 9 - ENVIRONMENT › Agency 25 - STATE WATER CONTROL BOARD › Chapter 740 - WATER RECLAMATION AND REUSE REGULATION › Part II - Reclaimed Water Treatment, Standards, Monitoring Requirements and Reuses › Section 9VAC25-740-90 - Minimum standard requirements for reuses of reclaimed water

Current through Register Vol. 40, No. 24, July 15, 2024
A. Minimum
				  standard requirements for reclaimed water shall be determined, in part, by the
				  reuse or reuses of that water. For specific reuses, the minimum standard
				  requirements of reclaimed water are provided in Table 90-A.
Table 90-A
Minimum Standard Requirements for
								  Reuses of Reclaimed Water
Reuse Category
Reuse
Minimum Standard Requirements
									 a
1. Urban - Unrestricted Access
All types of landscape irrigation in public
								  access areas (i.e., golf courses, cemeteries, public parks, school yards and
								  athletic fields)
Toilet flushing 
								  b
Firefighting or protection and fire suppression 
								  b
Outdoor reuse (i.e., lawn watering and
								  noncommercial car washing)b
Commercial car washes
Commercial air conditioning systems
Level 1
2. Irrigation - Unrestricted
								  Accessc
Irrigation for any food crops not commercially
								  processed, including crops eaten raw
Level 1
3. Irrigation - Restricted Accessc,
									 d, e
Irrigation for any food crops commercially
								  processed
Level 2
Irrigation for nonfood crops and turf, including
								  fodder, fiber and seed crops; pasture for foraging livestock; sod farms;
								  ornamental nurseries; and silviculture
4. Landscape Impoundments
									 f
Potential for public access or contact
Level 1
No potential for public access or contact
Level 2
5.
								  Constructione
Soil compaction
Dust control
Washing aggregate
Making concrete
Irrigation to establish vegetative erosion
								  controlg
Level 2
6. Industriale
Commercial laundries
Ship ballasth
Level 1
Livestock watering
									 i
Aquaculturej
Stack scrubbing
Street washing
Boiler feed
Once-through cooling
									 k
Recirculating cooling towers
									 k
Level 2
aFor reclaimed
								  industrial wastewater, minimum standards required shall be determined on a
								  case-by-case basis relative to the proposed reuse or reuses.
bThese reuses of
								  reclaimed water are prohibited in accordance with
								  9VAC25-740-50
								  B 2 where they would involve the distribution of reclaimed water to a
								  one-family or two-family dwelling in order to occur.
cReclaimed water
								  treated to Level 1 or 2 may be used for surface irrigation, including spray
								  irrigation. Reclaimed water treated to Level 2 may be used for spray irrigation
								  if the area to be irrigated restricts access to the public and has appropriate
								  setbacks in accordance with
								  9VAC25-740-170.
								  Reclaimed water treated to Level 1 or 2 may be used for irrigation of food
								  crops eaten raw, excluding root crops, only when there will be no direct
								  contact (or indirect contact via aerosol carry) between the reclaimed water and
								  edible portions of the crop.
dFor irrigation with
								  reclaimed water treated to Level 2, the following shall be prohibited unless
								  Level 1 disinfection is provided:
1. Grazing by milking animals on the irrigation
								  reuse site for 15 days after irrigation with reclaimed water ceases, and
2. Harvesting, retail sale or allowing access by
								  the general public to ornamental nursery stock or sod farms for 14 days after
								  irrigation with reclaimed water ceases.
eWorker contact with
								  reclaimed water treated to Level 2 shall be minimized. Level 1 disinfection
								  shall be provided when worker contact with reclaimed water is likely.
fLandscape
								  impoundments may also be used to store reclaimed water for other subsequent
								  reuses of that reclaimed water, such as irrigation, if included in an inventory
								  of reclaimed water storage facilities submitted to the department pursuant to
								  9VAC25-740-110 C
								  15.
gIrrigation with
								  reclaimed water to establish vegetative cover at a construction site shall be
								  subject to requirements for irrigation reuse specified in
								  9VAC25-740-100
								  C. Continued irrigation of the same site following construction completion
								  shall be subject to the minimum standard requirements of reuse category 1, 2,
								  or 3 contained in this table, determined by the intended reuse of the irrigated
								  site.
hReuse of reclaimed
								  water for ship ballast shall also comply with applicable federal regulations
								  and standards governing the use and discharge of ship ballast.
iLevel 1 disinfection
								  shall be provided when the reclaimed water is consumed by milking
								  livestock.
jLevel 1 disinfection
								  shall be provided for aquaculture production of fish to be consumed raw, such
								  as sushi.
kWindblown spray
								  generated by once-through cooling or recirculating cooling towers using
								  reclaimed water treated to Level 2, shall not reach areas accessible to workers
								  or the public unless Level 1 disinfection is provided. See also setback
								  requirements in
								  9VAC25-740-170
								  for open cooling towers.
B.
				  For any type of reuse not listed in subsection A of this section, including,
				  but not limited to, indirect potable reuse and below-ground drip irrigation
				  reuse that is newly proposed after October 1, 2008, indirect nonpotable reuse
				  that is newly proposed after January 29, 2014, or any reuse of reclaimed
				  industrial water, including reuses listed in subsection A of this section, the
				  department may prescribe specific reclaimed water standards and monitoring
				  requirements needed to protect public health and the environment. When
				  establishing these requirements for the proposed reuse, the department shall
				  consider the following factors:
1. The risk
				  of the proposed reuse to public health with specific input from the Virginia
				  Department of Health;
2. The degree
				  of public access and human exposure to reclaimed water by the proposed
				  reuse;
3. The reclaimed water
				  treatment necessary to prevent nuisance conditions by the proposed
				  reuse;
4. The reclaimed water
				  treatment necessary for the proposed reuse to comply with this and other
				  applicable regulations of the board;
5. The potential for improper or unintended
				  use of the reclaimed water;
6.
				  Other federal or state laws, regulations and guidelines that would apply to the
				  proposed reuse;
7. The similarity
				  of the proposed reuse to reuses listed in this chapter with regard to potential
				  impact to public health and the environment;
8. Whether the proposed reuse may be excluded
				  or prohibited by
				  9VAC25-740-50;
				  and
9. For new indirect potable
				  reuse proposals, residence or transport time, mixing ratios, and other relevant
				  information deemed necessary by the department.