1. (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. (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. (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. (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:

      1. (i) October 1, 2010, for systems serving more than 500 persons.
      2. (ii) October 1, 2011, for systems serving 100 to 500 persons.
      3. (iii) October 1, 2012, for systems serving less than 100 persons.

   4. (4) Provide at least 4-log treatment of viruses prior to the first customer when directed by the Department or no later than:

      1. (i) April 1, 2011, for systems serving more than 500 persons.
      2. (ii) April 1, 2012, for systems serving 100 to 500 persons.
      3. (iii) April 1, 2013, for systems serving less than 100 persons.
      4. (iv) A Department-approved alternative compliance schedule.
   5. (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. (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.

2. (b) Noncommunity groundwater systems including bottled water and vended water systems, retail water facilities and bulk water hauling systems.

   1. (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:

      1. (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.
      2. (ii) Comply with triggered monitoring requirements under § 109.1303 until beginning compliance monitoring under subparagraph (i).

   2. (2) Noncommunity groundwater systems not demonstrating at least 4-log treatment to the Department shall:

      1. (i) Comply with triggered monitoring requirements under § 109.1303.

      2. (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:

         1. (A) Sensitivity of the source aquifer to fecal contamination.
         2. (B) Proximity to sources of fecal contamination.
         3. (C) Microbiological sampling history.

3. (c) Groundwater systems with source water E. coli contamination or significant deficiencies.

   1. (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:

      1. (i) Provide an alternative source of water.
      2. (ii) Eliminate the source of contamination.
      3. (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. (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:

      1. (i) Written notice from the Department of a significant deficiency.
      2. (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. (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).

Authority

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).

Source

The provisions of this § 109.1302 adopted December 24, 2009, effective December 26, 2009, 39 Pa.B. 7279; amended April 27, 2018, effective April 28, 2018, 48 Pa.B. 2509; amended August 17, 2018, effective August 18, 2018, 48 Pa.B. 4974. Immediately preceding text appears at serial pages (391460) to (391462).

Cross References

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).