Current through Register Vol. 55, No. 13, March 29, 2025
(a)
Community groundwater systems.
Community groundwater systems are required to provide continuous
disinfection under §
109.202(c)(3)
(relating to State MCLs, MRDLs and treatment technique requirements) and in
addition shall:
(1) Comply with triggered
monitoring requirements under §
109.1303 (relating to triggered
monitoring requirements for groundwater sources) until beginning compliance
monitoring under paragraph (5).
(2)
Maintain at each groundwater entry point a residual disinfectant concentration
no less than 0.40 mg/L expressed as free chlorine or its equivalent as approved
by the Department, or other minimum residual approved by the Department as
demonstrated under §
109.1306 (relating to information
describing 4-log treatment and compliance monitoring) to provide 4-log
treatment of viruses.
(3)
Demonstrate how at least 4-log treatment of viruses will be provided by
submitting information as required under §
109.1306 when directed by the
Department or no later than:
(i) October 1,
2010, for systems serving more than 500 persons.
(ii) October 1, 2011, for systems serving 100
to 500 persons.
(iii) October 1,
2012, for systems serving less than 100 persons.
(4) Provide at least 4-log treatment of
viruses prior to the first customer when directed by the Department or no later
than:
(i) April 1, 2011, for systems serving
more than 500 persons.
(ii) April
1, 2012, for systems serving 100 to 500 persons.
(iii) April 1, 2013, for systems serving less
than 100 persons.
(iv) A
Department-approved alternative compliance schedule.
(5) Conduct compliance monitoring as
described in §
109.1305 (relating to compliance
monitoring) when directed by the Department following notification of approval
by the Department that at least 4-log treatment of viruses has been
demonstrated for a groundwater source or sources.
(6) Provide at least 4-log treatment of
viruses for new sources permitted after December 1, 2009, and conduct
compliance monitoring as described in §
109.1305 beginning the first day
the source is put into service.
(b)
Noncommunity groundwater systems
including bottled water and vended water systems, retail water facilities and
bulk water hauling systems.
(1)
Noncommunity groundwater systems may demonstrate at least 4-log treatment of
viruses is provided prior to the first customer by submitting information as
required under §
109.1306. Systems demonstrating at
least 4-log treatment of viruses under this paragraph shall:
(i) Comply with compliance monitoring
requirements under §
109.1305 when directed by the
Department following notification of approval by the Department that at least
4-log treatment of viruses has been demonstrated for a groundwater source or
sources.
(ii) Comply with triggered
monitoring requirements under §
109.1303 until beginning
compliance monitoring under subparagraph (i).
(2) Noncommunity groundwater systems not
demonstrating at least 4-log treatment to the Department shall:
(i) Comply with triggered monitoring
requirements under §
109.1303.
(ii) Comply with the requirements of
assessment source water monitoring as described in §
109.1304 (relating to assessment
source water monitoring) if the Department determines a groundwater source is
at risk to fecal contamination. The Department will consider any factors that
identify sources at risk to fecal contamination, including one or more of the
following:
(A) Sensitivity of the source
aquifer to fecal contamination.
(B)
Proximity to sources of fecal contamination.
(C) Microbiological sampling
history.
(c)
Groundwater systems with source
water E. coli contamination or significant deficiencies.
(1) A groundwater system with an
E.
coli-positive groundwater source sample collected under §
109.505(a)(3)
(relating to requirements for noncommunity water systems), §
109.1303(a) or
§
109.1304(a) shall
implement one or more of the following corrective actions:
(i) Provide an alternative source of
water.
(ii) Eliminate the source of
contamination.
(iii) Submit
information required under §
109.1306 and provide treatment
that reliably achieves at least 4-log treatment of viruses before the first
customer for the groundwater source or sources and comply with compliance
monitoring requirements under §
109.1305.
(2) A groundwater system with a significant
deficiency or an
E. coli-positive groundwater source sample
collected under §
109.1303(a) or
§
109.1304(a) will
receive one of the following forms of notification:
(i) Written notice from the Department of a
significant deficiency.
(ii)
Notification from a laboratory under §
109.810(b)
(relating to reporting and notification requirements) that a groundwater source
sample collected under §
109.1303(a) or
§
109.1304(a) was
found to be
E. coli-positive.
(3) A groundwater system with a significant
deficiency or an
E. coli-positive source water sample
collected under §
109.1303(a) or
§
109.1304(a) shall
comply with §
109.717 (relating to significant
deficiencies).
The provisions of this § 109.1302 amended under section 4
of the Pennsylvania Safe Drinking Water Act (35 P.S. §
721.4); and section 1920-A of The
Administrative Code of 1929 (71 P.S. §
510-20).
This section cited in 25 Pa. Code §
109.202 (relating to State MCLs,
MRDLs and treatment technique requirements); 25 Pa. Code §
109.301 (relating to general
monitoring requirements); 25 Pa. Code §
109.417 (relating to special
notice for significant deficiencies by noncommunity water systems); 25 Pa. Code
§
109.505 (relating to requirements
for non-community water systems); 25 Pa. Code §
109.611 (relating to
disinfection); 25 Pa. Code §
109.710 (relating to disinfectant
residual in the distribution system); 25 Pa. Code §
109.901 (relating to requirements
for a variance); 25 Pa. Code §
109.903 (relating to requirements
for an exemption); 25 Pa. Code §
109.1303 (relating to triggered
monitoring requirements for groundwater sources); 25 Pa. Code §
109.1304 (relating to assessment
source water monitoring); 25 Pa. Code §
109.1306 (relating to information
describing 4-log treatment and compliance monitoring); and 25 Pa. Code §
109.1307 (relating to system
management responsibilities).
