Caryn.Benjamin@la.gov Revised July 2015

Safe Drinking Water Program

ROUND 2 Source Sampling

Long Term 2 Enhanced Surface Water Treatment

Rule LT2 ESWTR

LT2 was promulgated on January 5, 2006 And is Effective on March 6, 2006

This rule only applies to Surface Water Systems!

LT2 ESWTR – Round 2Source Water Monitoring §141.701 (a) & (b):

Population Monitor for Frequency and Duration 10,000 Schedules 1, 2 & 3

Crypto, E. coli and turbidity

Once per month 24 months

< 10,000 1 Schedule 4

E. coli 2 Once per 2 weeks 12 months

1 Systems that serve less than 10,000 can monitor for Crypto instead of E. coli at least twice per month for 12 months or monthly for 24 months.2 Unless Crypto monitoring is triggered if annual mean ≤ 100 E.coli/100mL per the February 4, 2010 Memorandum from the Environmental Protection Agency (EPA).

Note:

Wholesale system must follow the schedule of the largest system in the combined distribution system (CDS).

Systems that purchase water and do not have their own surface water source do not have to comply with this rule!

LT2 ESWTR – Round 2

Monitoring Avoidance §141.701 (d):

1. If filtered systems provide a total of at least 5.5-log of treatment for Cryptosporidium (equal to Bin 4 treatment in §141.711)

Note: The system must notify the state the intent to provide the above no later than the date for submitting the sampling schedule for monitoring (see next slide)

LT2 ESWTR – Round 2Second Round Source Water Monitoring Schedules

§141.701 (c)

Schedule & PopulationSampling Schedule Due

Second Round Starts

1 100,000 January 1, 2015 April 1, 2015

2 50,000 - 99,999 July 1, 2015 October 1, 2015

3 10,000 - 49,999 July 1, 2016 October 1, 2016

4 < 10,000 & monitor for E. coli 1 July 1, 2017 October 1, 2017

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< 10,000 & monitor for Cryptosporidium 2

Twice per month (12) or once per month (24)

January 1, 2019 April 1, 2019

1 Applies only to filtered systems2 Applies to filter systems that have an annual mean of 100 E. coli /100 mL or greater.

LT2 ESWTR Round 2Sampling Schedules and Monitoring Plans:• Sample schedules must be approved by DHH.• Systems must submit their monitoring plan to DHH:

By E-mail: caryn.benjamin@la.gov or By Mail: P.O. Box 4489, Baton Rouge, LA 70821

• For systems that analyze their own E. coli samples, E. coli results must be submitted to the State by the 10th of the month following the month that the samples were collected in. Note: the water system’s lab must be DHH-certified for E. coli enumeration method.

Source Water Monitoring Guidance Manual:

http://www.epa.gov/safewater/disinfection/lt2/pdfs/guide_lt2_swmonitoringguidance.pdf

LT2 ESWTR Round 2

Sample Collection:• Collect samples per the approved sampling

schedule and monitoring plan. Any deviation must be approved by DHH.

• For any sample rejections or recollections, the sample must be recollected within 21 days.

• Crypto samples must be at least 10 L (22.5 lbs.) or filtered. Fill the 10 L cubitainer to the neck line. You should weigh the sample prior to shipment to avoid sample rejection.

• E. coli samples analyzed by DHH must be collected in 7 oz. sample bags (larger than bacteriological sample bags) provided by DHH. Must leave 1” of air space in the collection bags.

LT2 ESWTR Round 2Sample Shipping & Analysis:• Samples must be shipped same day or next

day to the DHH State lab in Baton Rouge and kept at the required temperatures: – E. coli < 10oC, not frozen– Crypto < 20oC, not frozen

• Lab must start analyzing for Crypto within 96 hours and E.coli within 30 hours.

• Samples must be analyzed by an EPA Approved/Certified Lab

• DHH will analyze both Crypto and E. coli samples for LT 2 Round 2 monitoring.

Requirements for E. coli analysis:

• DHH-OPH Lab 8 Forms - must be filled out with Mandatory Information (see next slide); place inside a Ziploc bag.

• Use 7-oz. sample bags supplied by DHH-OPH since the bags require QC by the State Lab

• Use small ice chest labeled Raw Water Samples Only with a sample bag rack, don’t combine w/ finished DW samples.

• Use wet ice in doubled Ziploc bags secured with tap. Samples must be at required temperature upon receipt at lab; samples cannot be frozen (may need to chill to 1-10°C prior to shipment)

• Samples that were not collected the same day they were received, and that are received at >10°C or are frozen, or samples that the laboratory has determined exceeded >10°C or froze during shipment, must be rejected.

Use Non Potable

Section & Insert 6

Put: Water body

type,

FS-flowing stream or

RL for Lake

Lab 8 Form

Put Source water

Turbidity

Only for systems 10K+

Lab 8 Form for E. coli• PWS ID – supplied by system• Facility ID (e.g., PWS ID or Intake ID) – supplied by system• Name of sampler – supplied by system (collected by who?)• Sample Identification – supplied on Lab 8 Form (stick on

sample)• Sample Collection Point ID (POC ID) – supplied by system• Sample Collection Date and Time – supplied by system (24hr

clock)• Sample Type – mark Non Potable 6. • Source Water Turbidity – e.g., 50 NTU (only for Systems

>10K)• Source Water Type – put in comments field: FS for a

flowing stream (e.g., river or bayou) or R/L for a Reservoir or Lake

• Analytical Method number – supplied by Lab• Method type – supplied by the Lab• Project Code - 0838

Requirements for Crypto analysis:

• Sample Collection Form - must be filled out with Mandatory Information (see next slide); place inside a Ziploc bag.

• Use 10-Liter sample containers supplied by DHH-OPH

• Use large ice chest labeled Raw Water Samples Only; don’t combine w/ finished DW samples.• Samples not weighing at least 22.5 lbs will be rejected. You should weigh the sample prior to shipment to avoid sample rejection.

• Samples that were not collected the same day they were received, and that are received at >20°C or frozen, or samples that the laboratory has determined exceeded >20°C or froze during shipment, must be rejected.

Under filled – fill to neck line

Requirements for Crypto analysis:

LT2 ESWTR Round 2

State Lab contact information:

• Baton Rouge lab:Peter Travis, Micro Manager 225-219-517

Beth Fava, PH Scientist 225-2195207

• Amite Regional Lab: Georgette Petitto, Manager 985-

748-2073

LT2ESWTR – Round 2

Bin Classifications - Systems 10,000 or greater must submit their Bin Classification (based on Crypto data) to the District Office within 180 days of completing the source water monitoring.

E. coli Averages - Systems less than 10,000 must submit their Highest E.coli Average (of the 12 sample running average) to the District Office within 180 days of completing the source water monitoring.

Region 1 & 3District Engineer: John.Williams@la.gov Phone: 504-599-0112

Region 2 & 9District Engineer: Stephen.Tassin@la.gov Phone: 225-342-7395

Region 4 & 5District Engineer: Jennifer.Kihlken@la.govPhone: 337-262-5311

Region 6, 7 & 8District Engineer: William.Smith2@la.gov Phone: 318-676-7470

State Office:Amanda.Laughlin@la.gov 225-342-8138Caryn.Benjamin@la.gov 225-342-6157

Contact Information www.dhh.la.gov/SafeDrinkingWater

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