16-SAP.pdf

Sampling Plan – Community Water Systems – 2015

FOR OFFICIAL USE ONLY

Month 2 Bldg 2358A Conrad Circle Month 3 Bldg 3316 Famcamp Month 4 Bldg 4300 Billeting Month 5 Bldg 314 Fire Dept

B. Repeat Samples - Positive Total Coliform or E. coli Sample

a. Luke AFB Water System - If a sample is determined as positive for total-coliform, it must be further tested for E. Coli and a set of three repeat samples must be collected on the same day within 24 hours (This time begins from when you were notified by the lab of the positive result).

The below table identifies site locations for resampling.

Original Location

Upstream tap w/in 5 service connections

Downstream tap w/in 5 service connections

All supplying active wells

(pre-treatment)

1 1 1 multiple

Total-Coliform Rule (TCR) – The re-sampling must be performed at the site where the original sample tested positive, and also two alternate locations five points upstream and downstream of the original site. If resample results come back negative, from original sampling point no further sampling is necessary. If resample results are positive for total coliform, CE Utilities will be contacted. Notification procedures must be followed; residents of housing/building where positive occurred will be notified.

Ground Water Rule (GWR) - Triggered source water monitoring is required after a total-coliform positive sample is collected from the distribution system in compliance with the TCR. Samples must be collected within 24 hours of notification, at least one sample from each ground water source (Wells) in use at the time the total coliform-positive routine sample was collected. The triggered source water samples must be analyzed for the presence of a State-approved fecal indicator (E. Coli). A positive fecal indicator GWR results is an Acute Violation requiring Public Notice. Contact ADEQ immediately at (602) 771-4560 or 1(800) 234-5677.

Repeat Sampling Locations - If a sample is taken at the beginning or at one service connection away from the beginning of the system is total-coliform positive, a repeat sample may not be required (can be waived by ADEQ, R18-4-202, H. d.) at an upstream site. If a sample taken at the end of the distribution system is total-coliform positive, then the original site plus 2 samples within 5 service connections upstream must be taken. In addition to these repeat samples, all active supplying well locations require sampling IAW the Groundwater Rule.

b. Gila Bend Water System- If a sample is determined positive for total-coliform, it must be tested for E. Coli and a set of at least three (3) repeat samples for each total coliform positive routine sample found (R18-4-202, H. 1.). Four (4) samples will be taken if a positive for total-coliform has been identified.

A public water system that collects fewer than five (5) routine samples per month and has one or

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Attachment 16

*triggered source water sampling identified in EPA, Ground Water Rule, collect at least one ground water source sample from each source in use at the time the total coliform+ sample was collected.

IV. Rules R

Figure 1 - Bacteriological Repeat Sampling Guidelines – Medium Water Systems

Y

Y

Medium Water Systems o Luke AFB Water System

Positive Sample is from the distribution system*

Do all of the following:

1. Test original sample for E. coli. If a repeat sample is E. coli+, contact ADEQ ASAP.

2. Within 24 hr. of receiving + result, collect on the same day four (4) samples for each total coliform+ sample.

Additional sampling is required at every active well supplying water to the distribution system.

3. If any repeat sample is total coliform+, repeat step 2 above until total coliforms are absent in one complete set of four

(4) samples. If any resample from any well is positive for E.

Coli, 4 additional samples must be taken and public notification started (Boiling Water Notice)

Positive Sample is from a well

Sample tested positive for total-coliform bacteria

1. Test sample for E. coli. If a repeat sample is E. coli+, contact ADEQ ASAP, and:

2. If notified to do so by ADEQ, disinfect, bacteriologically survey the relevant well(s) & conduct physical characteristics monitoring

Y

N

Y

* IMPORTANT: For small water systems, in month following the total coliform+ result, 5 samples must be collected in the distribution system that yielded the positive result.

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A chemical sampling schedule is included in pages 10-11. The following table identifes sample collection frequencies:

Sampling Frequency

Triennial

Quarterly

Annual Medium Systems

Every Nine Years

May be taken at any time during a quarter.

Samples taken in consecutive quarters must be taken at least 30 days apart.

May be taken at any time during the year.

Samples taken in consecutive years must be at least 90 days apart.

Take during 1st. yr of each compliance period. For example, if the compliance year are 2013-2016 the 1st compliance period is 2013.

Take during the 3rd.

year of the first 3-yr compliance period of each 9-year compliance cycle.

V. Chemical Sampling & Compliance Section

A. Confirmation Samples

Confirmation samples must be taken whenever a sample exceeds the MCL for nitrate or nitrite and/or if an unregulated contaminant is detected. Confirmation samples should be taken for other inorganic contaminants, organic contaminants, radionuclides, or secondary contaminants. For regulated contaminants, average the confirmation sample result with the first sample result, and use the average to determine compliance. Confirmation samples must be collected at the same sampling point as soon as possible (no later than two weeks) after the initial sample was taken.

B. Determinating Compliance with Sampling Requirements

Compliance with Arizona Administrative Code (AAC) Title 18, Chapter 4, is based on the analytical results obtained at each sampling point. If one sampling point violates the MCL, the system is in violation of the MCL. If more than one sample is collected during the year, compliance is determined by averaging all samples taken at each sampling point. If the annual average of any sampling point is exceeds the MCL, the system is out of compliance. Any sample result below the regulatory detection limit is calculated as zero in determining the running annual average.

Except for nitrate and nitrite, if sampling is conducted annually or less frequently, a sample result exceeding the MCL will not be considered in violation of the MCL until one year of quarterly sampling has been completed. For nitrate or nitrite, the system is immediately out-of-compliance if any sample result exceeds 50% of the MCL.

If an initial or a subsequent sample would cause the annual average to exceed the MCL, then the system is immediately out of compliance. If a system that is not in compliance with an MCL or MRDL, ADEQ must be notified as soon as possible (within 24 hours) of receiving the results and the

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public must be notified. Also notify 56 CES Utilities and Luke AFB Water Manager (56 CES/ CEOIU at DSN: 896-6109).

Figure 4 - Determining Compliance – See Figure 5 for Nitrate/Nitrite

N

N

N

Y

Y

Y

Y

Y

Y N

Y

Any sample exceeds MCL for inorganics, VOCs, SOCs, rads, secondaries

Take confirmation (2nd.) Sample ASAP at same sampling

pt. & average result with 1

st. sample

Unregulated contaminant is detected Average exceeds MCL for inorganics, VOCs, SOCs, rads, secondaries

Y

Y N

System collects > 1 sample during the year

System collects

< 1 sample/yr

Average all samples taken at each sampling pt. during yr.

Conduct 1 year of quarterly sampling

Y

Annual average of any sampling point using initial exceedance as the 1st. quarterly sample is > MCL (Use zero for any sample below the RDL in calculating average.)

Out of compliance

1. Notify ADEQ w/in 24 hours of receiving results

2. Notify public

Initial or subsequent sample would cause average to exceed MCL

In compliance

Y

Y

Figure 5 - Determining Compliance for Nitrate/Nitrite

Y

Initial sample is > 50% of MCL for nitrate/nitrite

Take confirmation (2nd.) Sample w/in 24 hrs at same sampling pt. & average result with 1st. sample

N

Y

N

*Sample during quarter that yielded the highest quarterly sample result

Y

Y

Y

Average exceeds > 50% of MCL for nitrate/nitrite.

1. Notify ADEQ w/in 24 hours of receiving results, Notify public

2. Sample quarterly for at least one year Running quarterly annual average is < MCL

Begin annual sampling* Any sample exceeds MCL for nitrate/nitrite

Out of Compliance

Conduct annual sampling

XIII. Sample Collection QA/QC

While not mandatory, the use of gloves while sampling is a best management practice. At a minimum, proper washing of hands is recommended before collecting samples.

• Use approved sample containers. Note that the container may be provided by the laboratory.

• Sample containers are to remain closed until the samples are ready to be collected. Do not rinse the sample container. Rinsing or overflowing the container removes preservatives.

• Before collecting the sample, all attachments (aerator, screen, etc.) should be removed from the tap. Note: When sampling for LCR compliance, cleaning strainers/aerators prior to sample collection or collecting the sample with strainers/aerators removed is prohibited and will result in a sampling violation. If samples are collected by residents, instructing the residents to remove or clean strainers/aerators is also prohibited. However, programs encouraging residents to periodically clean particulates from strainers/aerators are allowed.

• The tap should be fully opened in order to obtain a representative sample, flush the tap for at least 3-5 minutes or until water temperature stabilizes at approximately ground temperature.

If the sampling point is a tap indoors and connected to the building plumbing system and a sample truly representative of the distribution system is needed, it is necessary to know the volume of the line (calculated from line inside diameter and line length) and to measure water flow. Additional time required to clear the service line is calculated as volume divided by flow rate. Note that first draw samples do not follow these flushing procedures.

• Reduce the flow so that the stream is approximately ¼ inch in diameter (of the width of a pencil). Do not change the flow rate until sampling is completed.

• Remove the cap to the container; do not place the cap down on a dirty surface.

• Fill the sample container. Avoid contact between the tap and the mouth of the container. Do not overflow the container because this can wash out preservatives (if already added by the lab)

• Once the sample has been collected, replace the cap on the container. The sampling location ID number, time, date, and the name of the person who collected the sample should be written on the container and in a sample collection log. Also, all laboratory forms should be completed.

Additional sample collection procedures for volatile analytes:

• Remove the aerator, screen and any other attachments to prevent loss of the target contaminant to volatilization.

• The vial or bottle must be filled in a manner that does not pass any air bubbles through the water and that does not leave any headspace.

• Fill the vial or bottle to form a meniscus at the top of the container.

• Replace the cap on the vial or bottle and check for absence of headspace.

• Invert two or three times and check for bubbles.

Steps for preservation and transportation may include:

• Once the sample has been collected, the sample should be stored in a cooler and kept at a temperature of 4°C or < 10°C depending on the analyte. If ice is used in shipping, it is recommended that it be bagged separately to eliminate any contamination of the sample.

• Add preservatives or adjust pH, if required and containers with preservatives were not provided by the lab. Use appropriate personal protective equipment.

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• All samples should be transported to the laboratory and analyzed within the applicable holding time.

• General sample preservation and holding times for most analytes can be found in Table 1060:I, 21st Edition of Standard Methods (or Table 7010:I for radionuclides).

A chain of custody form creates an accurate written record that can be used to trace the creation, possession, and handling of the sample from the moment it is collected through analysis. When custody of drinking water samples changes, to include transfer for shipping or to the laboratory, the chain of custody form should be appropriately annotated. The chain-of-custody form should contain the following information at a minimum:

The name and signature of the individual and organization transferring the samples to the laboratory The name of the laboratory being used The name of the laboratory employee who is receiving the samples and the date and time samples were received The number of samples being transferred to the laboratory The sample ID number The date, time, and sampling location of where each sample was collected The date and time that the samples were received by the laboratory

XIV. Contact Information

A. Arizona Department of Environmental Protection (ADEQ) – (602) 771-4560/ 4561 http://www.azsos.gov/public_services/Title_18/18-04.htm

B. Laboratory to be used for sample analyses – Legend Labs – (602) 324-6110 (press ‘0’ to contact other managers, if Lisa Parrish is not available) After hours/ Emergency number 602-373-3212 http://www.legend-group.com

Account Login: Username: 56AMDS email: 56amds.sgpb@luke.af.mil

C. Maricopa County Department of Health – (520) 243-7930 http://www.pimahealth.org

D. Luke AFB Drinking Water team members:

Bioenvironmental Engineering Flight – 24/7 (623) 203-6852 Civil Engineering Customer Service Desk – (623) 856-4703

Attachment 1

Luke AFB Base Grid Map