Sample Proposal

This proposal focuses on a standard submission of the Initial Distribution System Evaluation (IDSE) plan to the U.S. Environmental Protection Agency (EPA) by October 1, 2007. S2DBPR requires either a standard monitoring plan (SMP) or a system specific study (SSS). A summary of some of their major differences is in Table 2.

Table 2: Standard Monitoring Plan vs. System Specific Study Systems serving 10,000-49,999 people or part of a combined system serving 10,000 – 49,999 people
IDSE Activity	Standard Monitoring Plan	Typical System Specific Study
Determine locations of high TTHMs and HAA5 levels	Identify locations that are different from Stage 1 monitoring locations; use system maps, water quality data and operational data.	Requires existing Stage 1 DBPR results, where each location was sampled 1x during the month of highest TTHM or HAA5 levels or warmest temperature, or a detailed, comprehensive, hydraulic model calibrated during period of high DBP formation potential.
Sampling*	8 samples per monitoring period, 48 samples each for TTHM and HAA5.	12 monitoring locations, 72 samples each for TTHM and HAA5, or hydraulic model-determined sampling.

* Stage 2 sampling requirements are based on the retail population served by each individual system, not the combined distribution system.

We will keep this simple. Hoyle, Tanner recommends the standard monitoring plan for most municipalities because:

· The standard plan is a straightforward, simple approach that meets the October 1, 2007 monitoring requirements.

· If the municipalities Stage 1 disinfection by-products (DBP) data are below the MCLs (80 ug/L TTHM, 60 ug/L HAA5), you do not need the increased scrutiny that can be obtained using the system specific study (SSS).

· The cost may be less using the standard monitoring plan vs. a typical system specific study, since a distribution system hydraulic model is not necessary.

PROPOSED SCOPE OF SERVICES

For a standard monitoring plan Hoyle, Tanner will:

· Meet with water department staff on-site

o Review the requirements of submitting a standard monitoring plan

o Review and obtain copies of the water department's Stage 1 DBPR monitoring data

· Develop a standard monitoring plan

o Follow EPA methodology, standards and protocol

o Use the applicable online tools available on the EPA's website

o Identify monitoring locations for high TTHMs/HAA5s that are different from Stage 1 monitoring locations

§ Use the municipality’s, system maps, water quality data and operations information to locate sites

o Develop a sampling plan that includes:

§ 8 total samples every 60 days (total of 48 samples each for TTHM and HAA5)

§ Include 1 near source, 2 ART (Average Residence Time), 3 at high TTHM and 2 at high HAA5

§ Dual samples at each location – one for TTHM, one for HAA5

§ Collection of samples during peak historical month or warmest water temperature month

· Submit draft copy of the SMP to the municipality’s water department for review on or before September 1, 2007

· Incorporate the municipality’s water department's review comments into SMP prior to September 15, 2007

DELIVERABLES

· Three (3) bound copies of the standard monitoring plan to the municipalities water department on or before October 1, 2007.

· One bound copy of the standard monitoring plan, to the EPA on or before October 1, 2007.