Sample Schedule Guide

Transcription

1 Sample Schedule Guide Water systems have different monitoring requirements based on factors like water system type, source water type, and population served. In order to understand how often your water system needs to test for different contaminants, you must develop sample schedules customized to your own water system. First, review the information available at Then, use this guide to document your system s requirements. How to Use this Guide This guide includes an example monitoring schedule and blank forms that you can copy and fill in. The example monitoring schedule is typical for a groundwater system with three wells serving 3,000 people. Your sampling requirements may be different. Many water systems need more samples at new wells than at existing wells. Monitoring requirements for some distribution samples vary with population. If you do not know the facility IDs and sample point IDs in your system, they can be found on Drinking Water Watch at Special instructions for systems installing new wells Sample schedules must be submitted as part of a Water System Management Plan (WSMP). Water systems must have a complete WSMP before receiving an Authorization to Construct from the Public Water Supply Section. For new well projects, the facility ID and sampling point ID may not have been assigned by the time you prepare your WSMP. If this is the case, leave the facility id and sampling point id blank for now. Once the well is activated you can go back and add the codes in. The sampling guide will be a reference for your future use. ***Note about asbestos sampling: water systems in vulnerable counties or containing asbestos cement pipe may be required to monitor for asbestos. Depending on circumstances samples may be required either at the entry point or in the distribution system. The example system below is required to take asbestos samples in the distribution. For more specific information on your system, contact the Compliance Services Branch or your regional office.*** ***Note about secondaries: this group includes sodium, sulfate, manganese, and iron. These chemicals are typically collected and tested along with inorganics samples.*** Definitions Entry point. The point where water enters a distribution system. Many entry points are labeled E01, E02, or similar. Sampling point. A point where a sample is collected. Water systems should use consistent sampling point codes for all entry point samples. Water System Facility: A unit of the water system. All water systems have a distribution facility whose ID is D01. Groundwater systems will also have at least one well. Any water systems treating the water (such as adding chlorine) will also have at least one treatment plant.

2 EXAMPLE Monitoring Schedule, New Community Groundwater System Water System ID: NC Water System Name: Example New Groundwater System Number of Wells: 3 Number of Treatment Plants: 3 Number of Entry Points: 3 Population Served: _3,000 Facility Name: Distribution Facility ID: D01 Asbestos 1 Initial, then every 9 yrs Bacti (total Coliform) 3 Monthly Lead and Copper 20 Every 6 months Total trihalomethanes (TTHM) and Haloacetic Acids (HAA5) 3 MRT sites (1 per entry point) Yearly, between 7/1 and 9/30 Facility Name: _Treatment Plant #1_ Facility ID: P01 Sampling Point ID: E01 Group or Individual Number of Frequency Synthetic Organic Chemicals/ 1 Quarterly Volatile Organic Chemicals 1 Quarterly

3 Facility Name: Facility ID: Sampling Point ID: EXAMPLE Monitoring Schedule, New Community Groundwater System Group or Individual Synthetic Organic Chemicals/ Volatile Organic Chemicals _Treatment Plant #2 P02 E02 Number of Frequency 1 Quarterly 1 Quarterly Facility Name: _Treatment Plant #3_ Facility ID: P03 Sampling Point ID: E03 Group or Individual Number of Frequency Synthetic Organic Chemicals/ 1 Quarterly Volatile Organic Chemicals 1 Quarterly

4 Water System ID: NC Water System Name: Number of Wells: Number of Treatment Plants: Number of Entry Points: Population Served: Facility Name: Distribution Facility ID: D01

5