Current through Register Vol. 39, No. 6, September 16, 2024
(a)
Reclaimed water treatment processes producing an effluent quality prior to
storage, distribution, or utilization that meets the parameter limits listed
below shall be classified as Type 2:
(1)
monthly average five-day biochemical oxygen demand
(BOD5) of less than or equal to 5 mg/L and a daily
maximum BOD5 of less than or equal to 10 mg/L;
(2) monthly average total suspended solids
(TSS) of less than or equal to 5 mg/L and a daily maximum TSS of less than or
equal to 10 mg/L;
(3) monthly
average ammonia (NH3-N) of less than or equal to 1 mg/L
and a daily maximum NH3-N of less than or equal to 2
mg/L;
(4) monthly geometric mean
Escherichia coli (E. coli) or fecal coliform level of less than or equal to
3/100 mL and a daily maximum E. coli or fecal coliform level of less than or
equal to 25/100 mL;
(5) monthly
geometric mean Coliphage level of less than or equal to 5/100 mL and a daily
maximum Coliphage level of less than or equal to 25/100 mL;
(6) monthly geometric mean Clostridium
perfringens level of less than or equal to 5/100 mL and a daily maximum
Clostridium perfringens level of less than or equal to 25/100 mL; and
(7) maximum turbidity of 5 Nephelometric
Turbidity Units (NTUs).
(b) Reclaimed water treatment processes
producing an effluent quality prior to storage, distribution, or utilization
that meets the parameter limits listed below shall be classified as Type 1:
(1) monthly average five-day biochemical
oxygen demand (BOD5) of less than or equal to 10 mg/L
and a daily maximum BOD5 of less than or equal to 15
mg/L;
(2) monthly average total
suspended solids (TSS) of less than or equal to 5 mg/L and a daily maximum TSS
of less than or equal to 10 mg/L;
(3) monthly average ammonia
(NH3-N) of less than or equal to 4 mg/L and a daily
maximum NH3-N of less than or equal to 6 mg/L;
(4) monthly geometric mean Escherichia coli
(E. coli) or fecal coliform level of less than or equal to 14/100 mL and a
daily maximum E. coli or fecal coliform level of less than or equal to 25/100
mL; and
(5) maximum turbidity of 10
NTUs.
(c) Reclaimed
water produced by industrial facilities shall not be required to meet the
criteria in this Rule if the reclaimed water is used at the facility in an
industrial process and the area of use has no public access and does not result
in employee exposure.
Authority
G.S.
143-215.1;
143-215.3(a);
Eff. June 18, 2011;
Readopted Eff. September 1,
2018.
