overview of requirements for groundwater · pdf fileoverview of requirements for groundwater...
TRANSCRIPT
Overview
• Getting Starting
• Monitoring Requirements
• Operational Requirements
• Other Requirements
Getting Started
• Approval Required
• Plans and Specifications
• Waterlines
• Wells
• Tanks
• Chemical treatment systems
• Pumps
Getting Started
• Cover letter with engineering report
• Submittal form
• TCEQ Core Data Form (for new systems)
• Sealed engineering plans and specifications
• Well completion data
Getting Started
• Requirements on our website
• http://www.tceq.texas.gov/drinkingwater/newsystems.html
• Checklist for Proposed Public Water System
• Contact Staff on Utilities Technical Review Team
Construction of PWS Wells
● 18 inch casing
● Sealing Block
● Sealed Well Head
● Screened Vents
● Sampling Tap
● Flow Meter
● Fenced or Housed
● All Weather Road
● Air Release Device
Sanitary Conditions of PWS Wells
● Protection from Flooding
● >50 feet: Livestock, Septic Tanks, Cemeteries, Sewers
● > 150 feet: Septic Tank Drainage Fields, UST, liquid pipeline
● >300 feet: Industrial Waste Drainage Ditch, Lift Stations
● > 500 feet: Sewage Treatment Plant, Landfill, Sewage Irrigated land, BFU Sites, Solid Waste Site
Monitoring
• Federal and State requirements
• Basis for the Federal Drinking Water Program
• Measures the amount of contaminants in water
Monitoring
• Bacterial Monitoring
• Total Coliform
• All systems
• Monthly Requirement
• Based on Population
Minimum Number of Samples Population Served per Month 1 to 1,000 . . . . . . . . . . . . . . . . . . . . . . 1 1,001 to 2,500 . . . . . . . . . . . . . . . . . . 2 2,501 to 3,300 . . . . . . . . . . . . . . . . . . 3 3,301 to 4,100 . . . . . . . . . . . . . . . . . . 4 4,101 to 4,900 . . . . . . . . . . . . . . . . . . 5 4,901 to 5,800 . . . . . . . . . . . . . . . . . . 6 5,801 to 6,700 . . . . . . . . . . . . . . . . . . 7 6,701 to 7,600 . . . . . . . . . . . . . . . . . . 8 7,601 to 8,500 . . . . . . . . . . . . . . . . . . 9 8,501 to 12,900 . . . . . . . . . . . . . . . . 10 12,901 to 17,200 . . . . . . . . . . . . . . . 15 17,201 to 21,500 . . . . . . . . . . . . . . . 20 21,501 to 25,000 . . . . . . . . . . . . . . . 25 25,001 to 33,000 . . . . . . . . . . . . . . . 30 33,001 to 41,000 . . . . . . . . . . . . . . . 40 41,001 to 50,000 . . . . . . . . . . . . . . . 50
Monitoring
• Bacterial Monitoring
• Groundwater Rule
• Requires Well Monitoring
• Required if Positive Total Coliform in distribution system
Monitoring
• Bacterial Monitoring
• Groundwater Rule
• Triggered source sampling
• Corrective actions
• 4-Log viral treatment
• Triggered Source Monitoring Plans
Monitoring
• Bacterial Monitoring
• Corrective actions
• TCEQ will require a Corrective Action when a fecal indicator is found in the groundwater source.
• There are 6 possible corrective actions.
Monitoring
Approved Corrective Actions:
1. Correct all significant deficiencies
2. Provide alternate source of water
3. Eliminate source of contamination
4. Provide 4-log viral treatment
5. Well disinfection in accordance with AWWA procedures
6. A state-specified period of source assessment monitoring
Corrective Action Timeline
Day 30 Day 0 Day 120 Day ?
Lab notifies
PWS of a raw
water fecal (+)
sample result,
PWS creates
PN
Communicate
with TCEQ
Complete corrective
action or in compliance
with a schedule
Notification to
TCEQ
Monitoring
• Chemical Monitoring
• Numerous Contaminants
• Systems type determines sampling frequency
• TCEQ conducts sampling
Monitoring
• Chemical Monitoring
• TCEQ determines sampling schedule
• Schedule can be found on TCEQ website
• “Drinking Water Watch,”
• http://dww.tceq.texas.gov/DWW/
Monitoring
• Compliance Determination
• Both microbial and chemical contaminants
have a limit set by “EPA” called a Maximum Contaminant Level (MCL)
• MCL based on evaluation of health risk data and cost to treat contaminant
• TCEQ staff in Public Drinking Water section do compliance determination
Monitoring
• Public Notice
• Public Notice is required when a sample is above the MCL or is not collected
• Schedule for public notice can differ per rule
• TCEQ staff in Public Drinking Water section in Austin can assist
Operating
• Operation activities at Public Water System are evaluated by the TCEQ region offices
• Evaluation is conducted during Comprehensive Compliance Investigations (CCI)
Facility Notification
● Courtesy call approximately 1 to 2 weeks prior to
investigation, unless...
● TCEQ Region Office advises facility that ALL
Required Records must be available for review
at the time of the scheduled CCI
● Records checklist provided in advance, request it
What to Expect During the CCI
● File and Record Review
● Facility Evaluation
● Distribution Evaluation
● Exit Interview
Capacities
● Well Pumping Capacities
● Storage Tank Capacities
● Pressure Tank Capacities
● Service Pump
● Raw/Transfer Pumping Capacities
● Proprietary Treatment System Capacities
Capacities
Example:
System with >250 connections:
Two wells – 0.6 gpm/connection
Total storage of 200 gallons/connection
Two service pumps – 2.0 gpm/connection
Elevated Storage Tank - 200 gpm/connection
Required Records
● Certified Operators
● CSI Certificates
● Wholesale Water Contracts
● Monthly Operating Reports
● ANSI/NSF Certifications
● Plumbing Ordinance or Service
Agreements
● Well Plugging Reports
● Well Logs
Required Records
● Construction and Interim
Approval Letters
● Up-to-date Maps of the
Distribution System
● Tank Inspection Reports
● Back-Flow Prevention
Program
● Sanitary Control
Easements
● Variances or Exemptions
Two Year Retention Schedule
§290.46(f)(3)(A)
● Volume of water treated each day or each week
● Amount of chemicals used each day or each week
● Dates dead-end-mains are flushed
● Complaints received by the system (detailed)
● Dates storage tanks and facilities are cleaned
● Maintenance records for equipment and facilities
Three Year Retention Schedule
§290.46(f)(3)(B)
● NOV’s and Corrective Actions
● Copies of Public Notices issued by the system
● Disinfectant Residual Monitoring (Distribution)
● Calibration Records/Laboratory/Meters/Etc.
● Backflow Prevention Device Programs (initial
installs and annual calibrations)
Five Year Retention Schedule
§290.46(f)(3)(D)
● Microbiological Analyses
● Annual Inspections for Water Storage and
Pressure Tanks
● Inspections for Pressure Filters
Ten Year Retention Schedule
§290.46(f)(3)(E)
● Monthly Operating Reports
● Chemical Analyses
● Customer Service Inspections (CSI)
● Written Reports, Summaries, Communications
Inspections of the system conducted by the
system, private consultants, or the TCEQ
● GWR 4-Log Minimum Specified Residual
Monthly Operating Report (New)
Monitoring Plans and Operations Manual
§290.121and §290.42(l)
Monitoring Plan
● Identify all sampling locations and entry points
● Describe sampling frequency
● Procedures and labs used
● Can be updated at any time must work with
TCEQ Public Drinking Water to get approved
Operations Manual
● Operator routine maintenance and repair
procedures
● Protocols in the event of a natural or man-made
catastrophe
● Telephone numbers of personnel and agencies to
be contacted in the event of an emergency.
Calibration Requirements
§290.46(s)(1)
● CALIBRATE EVERY 3 Years
● Well Meters, Groundwater Production Meters
Flow Measuring Devices
Disinfectant Residual Analyzers
§290.46(s)
● Bench-top Accuracy Verification - 30 DAYS
(With known concentrations – Gel Standards)
● On-Line Calibration - 90 DAYS
● (With known concentrations)
● On-Line Calibration Check -MONTHLY
( With known concentrations OR comparing with
results of an approved bench-top, amperometric,
spectrophotometric, or titration method)
Storage Tanks
Ground and Elevated
● General Condition
● Inlet and Outlet
● Water Level Indicators
● Vents
● Hatches
● Overflows
● Ladders
● Fencing
Storage Tanks
Pressure
● General Condition
● Air-To-Water Volume Indicators
● Pressure Release Devices
● Pressure gauges
● Air Filters
Disinfection
● General Condition of Facilities, Equipment and
Housing, Scales
● Vents, Fans if necessary
● Injection Points
● NH3 bottle
● SCBA
● Capacity > 50%
Distribution
● Check your chlorine residual
● Pressure (measured at highest elevations)
● Leaks
● Exposed lines
Exit Interview
● Previous CCI issues
● Current Deficiencies
● 14-Day Area of Concern Notification
● Additional Issues
● Exit Interview Form
After Receiving the Letter
If Violations are Noted
● Respond in writing by the compliance due date
● Option to Contest Violations
(contact person on letter)
● Read and understand “Corrective Action”
● Call region office for technical assistance and for
time extensions
GUIDANCE MANUALS
Download these manuals from the TCEQ Website at
http://www.tceq.texas.gov
Just insert the document number in the subject search box
●RG-195: 30 TAC Chapter 290 Subchapter D
●RG-346: 30 TAC Chapter 290 Subchapter F
●RG-384: How to Develop a Monitoring Plan
●RG-407: Disinfectant Residual Reporting
Need Assistance
● Financial, Managerial and Technical (FMT)
assistance can be requested through Public
Drinking Water Section
● Small Business and Local Government
Assistance Hotline 1.800.447.2827
● Public Drinking Water Conference
August 7 – 8, 2012, Austin Texas
Elston Johnson
Water Supply Division
● TCEQ Headquarters - Austin, Texas
● Office: 512.239.0990
● Direct Line: 512-239-6266
● E-mail: [email protected]