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Virginia Administrative Code
Title 12. Health
Agency 5. Department of Health
Chapter 590. Waterworks Regulations
5/24/2022

12VAC5-590-570. Operational reporting requirements.

A. Monthly operational reports.

1. A classified waterworks is required to report monthly information to the department no later than the 10th of the month following the month during which the monitoring period occurred.

2. A classified waterworks using conventional filtration shall report using the monthly operating report (MOR) form approved by the department. All other classified waterworks shall report the required information specified in Tables 570.1 through 570.14, based on the treatment processes employed. Monitoring data shall be collected for each day the operating staff attend to the operation of the facilities.

3. To determine if a waterworks using UV reactor systems is operating within validated conditions designed in accordance with 12VAC5-590-1005, the following parameters shall be monitored and reported: (i) on/off status for each reactor; (ii) flow rate through reactor train; (iii) UV intensity as measured by a UV sensor; (iv) lamp status; (v) lamp age; and (vi) UV transmittance. The operational set points shall be reported if set point control is used. The calculated UV dose shall be reported if other than a set point control is used.

4. An unclassified waterworks is required to report quarterly the following information specified in Table 570.1, where applicable, to the department no later than the 10th of the month following the calendar quarter during which the monitoring period occurred.

5. An unclassified waterworks that is using any of the treatment processes described in Tables 570.2 through 570.14 is required to report no later than the 10th of the month following the calendar month during which the monitoring occurred. The report shall contain the required information specified in Tables 570.1 through 570.14 based on the treatment processes employed. The monitoring data shall be collected at a minimum frequency as established by the department.

6. The department may vary the reporting requirements on a case-by-case basis.

Table 570.1
Baseline Data -- All Waterworks

Public water system ID no.

System name

Reporting month and year (reporting quarter and yeara)

Location (county)

Number of connections, monthly average (maximum for reporting perioda)

Population served, monthly average (quarterly average and maximum daya)

Total source water withdrawn, gpd

Total source water treated, gpd

Total finished water produced, gal/month (for each entry point) or

Total water purchased, gal/month (at each consecutive connection)

Operator name (printed and signature)

Operator classification (Class 1 to Class 6)

Operator DPOR certification no.

Name and contact information of the emergency contact person (text, voice phone number)

Required for an unclassified waterworksa

Table 570.2
Chlorine Disinfection

Chlorine compound used (chlorine gas, calcium hypochlorite or sodium hypochlorite)

Amount of chlorine compound used at each application point, lb/day

Residual disinfectant concentration (measured as total chlorine, free chlorine, combined chlorine, or chlorine dioxide) at entry point, mg/L

Chlorite concentration (if chlorine dioxide is used), daily measurement at entry point, mg/L

Table 570.3
Chlorine Residual in the Distribution System

Chlorine compound used (chlorine gas, calcium hypochlorite or sodium hypochlorite)

Residual disinfectant concentration, measured as total chlorine, free chlorine, combined chlorine, or chlorine dioxide, mg/L (collected with each total coliform bacteria sample, in accordance with approved sampling plan)

Table 570.4
Rechlorination in the Distribution System

Chlorine compound used (chlorine gas, calcium hypochlorite or sodium hypochlorite)

Amount of chlorine compound used at each application point, lb/day

Free chlorine residual concentration before rechlorination, mg/L

Free chlorine residual concentration after rechlorination, mg/L

Free chlorine residual, mg/L (measured and reported with each total coliform bacteria sample, in accordance with approved sampling plan)

Table 570.5
Iron and Manganese Treatment by Oxidation, Detention and Filtration

Source water iron and manganese concentrations, mg/L (each source)

Oxidant amount used, lb/day

Finished water iron and manganese concentrations, mg/L (each filter)

Finished water pH (each filter)

Filter hours between backwash (each filter)

Table 570.6
Iron and Manganese Treatment by Ion Exchange

Ion exchange material (type, manufacturer, and product name)

Source water iron and manganese concentrations, mg/L (each source)

Finished water iron and manganese concentrations, mg/L (each unit softener)

Finished water pH (each unit softener)

Head loss, psi (each unit softener)

Regeneration date and method (each unit softener)

Backwash date and duration of washing (each unit softener)

Backwash rate, gpm (each unit softener)

Table 570.7
Sequestration of Iron and Manganese

Chemical used (manufacturer and product name)

Quantity used, lb/day (average)

Source water iron and manganese concentrations, mg/L (each source)

Finished water (entry point) iron and manganese concentrations, mg/L

Finished water (entry point) treatment chemical concentration, mg/L

Treatment chemical residual concentration, mg/L (value at distal end of distribution system, report at same frequency as free chlorine residual testing)

Table 570.8
pH Adjustment or Corrosion Control by Chemical Addition

Chemical used (manufacturer and product name)

Quantity used, lb/day (average)

Source water pH

Finished water (entry point) pH

Finished water (entry point) treatment chemical concentration, mg/L (if required water quality parameter for compliance with lead and copper)

Table 570.9
Cation Exchange Softening

Cation exchange material (type, manufacturer, and product name)

Regeneration date and method (each unit)

Backwashing date and duration of washing (each unit)

Softener influent hardness, mg/L as CaCO3 (each source)

Softener effluent hardness, mg/L as CaCO3 (each unit)

Stabilization chemical type, weight, daily dosage

Finished water (entry point) pH

Finished water (entry point) alkalinity, mg/L

Finished water (entry point) hardness, as CaCO3

Table 570.10
Fluoridation

Chemical used (manufacturer and product name)

Fluoride used, lb/day

Fluoride dosage, mg/L (daily)

Water treated, MGD

Finished water (entry point) fluoride concentration, mg/L (maximum, minimum, and average)

Table 570.11
Microfiltration or Ultrafiltration

Hours unit in operation

Source water flow, gpd

Filtrate volume, gpd

Recirculated during suspension mode (volume or percent of feed flow, per day)

Waste volume, gpd

Maximum stabilized flux, gpd/ft2

Source water turbidity, NTU bench test (daily)

Source water turbidity, NTU in line (collected at same time as bench test)

Source water turbidity, NTU in-line (maximum daily)

Source water alkalinity, mg/L as CaCO3 (daily)

Source water hardness, mg/L as CaCO3 (daily)

Source water temperature, oC (daily)

Source water pH (daily)

Filtered water turbidity, NTU bench test (daily)

Filtered water turbidity, NTU in line (collected at same time as bench test)

Filtered water turbidity, NTU in line (maximum daily)

Pressure loss across pre-filter, psi (daily) (if pre-filters are automatically cleaned, reporting is not required)

Number of membrane modules in use (daily)

Direct integrity test start time (daily)

Direct integrity test starting pressure, psi (each membrane unit, daily)

Direct integrity test final pressure, psi (daily)

Direct integrity test duration, minutes (daily)

Direct integrity test pressure decay rate, psi/minute (daily)

Direct integrity test Log Removal Value (daily)

Trans-membrane pressure, psi (daily)

Trans-membrane pressure before clean-in-place, psi

Trans-membrane pressure after clean-in-place, psi

Cleaning solution used (manufacturer and product name)

pH of rinse water after clean-in-place

Calibrations completed (itemized instruments with dates completed)

Module repairs or replacements (itemized with dates repairs or replacements)

Entry point log inactivation of Giardia by disinfection (daily)

Table 570.12
Reverse Osmosis

Hours unit in operation

Pre-filter inlet pressure, psi (daily)

Pre-filter outlet pressure, psi (daily)

RO Inlet pressure, psi (daily)

RO outlet pressure, psi (daily)

Total permeate flow, gpd

Concentrate flow (bypass), gpd

Finished water flow, gpd

Total finished water (entry point) flow, gpd

Pre RO TDS, mg/L (daily)

Post RO TDS, mg/L (daily)

Pre RO turbidity, NTU (daily)

Post RO turbidity, NTU

Pre RO conductivity, uS/cm (daily)

Post RO conductivity, uS/cm (daily)

Finished water conductivity, uS/cm (daily)

Source water pH (daily)

Permeate pH (daily)

Finished water (entry point) pH (daily)

Module repairs or replacements (itemized with dates of repairs or replacements)

Table 570.13

UV Disinfection

All waterworks using ultraviolet (UV) disinfection must report the following:

Total run time, hours (per unit)

Lamp status for each reactor train

Lamp age for each reactor train

Total production, MGD or gpd

Flow Rates, minimum, maximum and average, MGD or gpd for each reactor train

To receive disinfection credit, the following shall also be reported:

Number of off-specification events

Total off-specification volume, gal

Percent off-specification volume

UV Intensity setpoint, W/m2 (if using intensity setpoint approach, daily)

UV Intensity for each reactor, minimum, W/m2 (if using intensity setpoint approach, daily)

UV Intensity sensor calibration date for each reactor

Required dose, mJ/cm2 (if using calculated dose approach)

UV Transmittance (UVT) for each reactor, daily percentage (if using calculated dose approach)

Calculated dose for each reactor, daily minimum, mJ/cm2 (if using calculated dose approach)

Validated dose for each reactor, daily minimum, mJ/cm2 (if using calculated dose approach)

UVT analyzer calibration date (if using calculated dose approach)

UV intensity sensor correction factor

Table 570.14

Ozone Disinfection

All waterworks using ozone disinfection must report the following:

Ozone applied, lb/day and mg/L.

Bromate concentration (mg/L), at the entry point to the distribution system, monthly.

To receive disinfection credit, the waterworks shall also report:

Minimum ozone concentration Cinitial from first sample point (Effluent Method) or Cgeo (Log Integration Method) in all contactors during peak flow, daily.

Minimum and average ozone concentration Cfinal (mg/L) for each contactor in service, daily.

Log Inactivation by ozonation, for Giardia, virus and, if applicable, Cryptosporidium, daily at peak flow and the minimum CT, daily.

B. The owner shall report the following incidents within 24 hours to the department:

1. Water pressure below the 20 psi minimum required in the distribution system, including zero or negative pressure. Examples of these events include treatment plant or pump station shutdowns due to equipment failure, power outages, emptying of storage tanks, and draining of the distribution system during fire flow events.

2. Flooding of clearwells.

3. Flooding of groundwater wells.

4. Any other situation that occurs with the waterworks that presents or may present an imminent and substantial threat to public health.

Statutory Authority

§§ 32.1-12 and 32.1-170 of the Code of Virginia.

Historical Notes

Derived from VR355-18-005.13 § 2.24, eff. August 1, 1991; amended, Virginia Register Volume 9, Issue 17, eff. June 23, 1993; Volume 37, Issue 20, eff. June 23, 2021; Errata, 37:22 VA.R. 3448 June 21, 2021.

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