25 Pa. Code § 73.165 - Disinfection
(a) Disinfection of
effluent is required prior to spraying. The disinfection shall be by
chlorination and shall produce an effluent which will contain a concentration
not greater than 200 fecal coliform organisms per 100 milliliters in a single
sample. Disinfection units shall be installed in accordance with the
manufacturer's specifications. Disinfection units shall be reliable, able to
disinfect sewage effluent and be easily maintained by the property
owner.
(b) A chlorinator shall be
designed to maintain a chlorine residual of 0.2 PPM to 2 PPM and provide for a
30 minute contact time.
(1) When an erosion
chlorinator is proposed, the base of the unit may be placed no deeper than 36
inches below finished grade.
(2)
When a lift pump is used to keep the unit no deeper than 36 inches below
finished grade, the pump shall have a discharge rate that does not exceed the
manufacturer's specifications for the erosion chlorinator and shall meet the
appropriate specification of §
73.46 (relating to dosing pumps,
siphons and lift pumps).
(3)
Chlorine contact time may be obtained using a separate chlorine contact tank or
in-line chlorination followed by the storage tank.
(4) Chlorinators shall be housed separately
from chlorine contact tanks or storage tanks unless the tanks are specifically
designed to house chlorinators.
Notes
The provisions of this § 73.165 issued under section 9 of the Pennsylvania Sewage Facilities Act (35 P. S. § 750.9); The Clean Streams Law (35 P. S. §§ 691.1-691.1001); and section 1920-A of The Administrative Code of 1929 (71 P. S. § 510-20).
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