ML12157A262
| ML12157A262 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 05/23/2012 |
| From: | Entergy Operations |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| GNRO-2012/00039 | |
| Download: ML12157A262 (4) | |
Text
Attachment 17 to GNRO-2012/00039 Attachment 17 to G NRO-2012/00039 Entergy Nuclear Grand Gulf Nuclear Station License Renewal Environmental Audit
- Hydrology Ford - Attachment E "CS&I Annual Drinking Water Quality Report"
Attachment E CS&I Annual Drinking Water Quality Report Page 12 of 21
2010 Annual Drinking Water Quality Report CS&I Water Association PWS#: 0110002 May 2011 We're pleased to present to you this year's Annual Quality Water Report. This report is designed to inform you about the. quality of water and services we deliver to you every day. Our constant goal is to provide you with a safe and dependable supply of drinking water. We want you to understand the effort we make to continually improve the water treatment process and protect our water resources. We are committed to ensuring the quality of your water. OUr.u.water source is fir6.**. wells dra~iit from theatahoula A'qui fer."
The source water assessment has been completed for our pubic water system to determine the overall susceptibility of its drinking water supply to identified potential sources of contamination. The general susceptibility rankings assigned to each well of this system are provided immediately below. A report containing detailed information on how the susceptibility determinations were made has been furnished to our public water system and is available for viewing upon request. The wells for the CS&I Water Association have received moderate susceptibility rankings to contamination.
If you have any questions about this report or concerning your water utility, please contact Ronald Brown at 601.672.2374. We want our valued customers to be informed about their water utility. If you want to learn more, please attend any of our regularly scheduled meetings. They are held on the second Tuesday of the month at 6:00 PM at 3148 Kamac Ferry Rd, Port Gibson, MS.
We routinely monitor for constituents in your drinking water according to Federal and State laws. This table below lists all of the drinking water contaminants that we detected during the period of January I"sto December 31", 2010. In cases where monitoring wasn't required in 2010, the table reflects the most recent results. As water travels over the surface of land or underground, it dissolves naturally occurring minerals and, in some cases, radioactive materials and can pick up substances or contaminants from the presence of animals or from human activity microbial contaminants, such viruses and bacteria, that may come from sewage treatment plants, septic systems. agricultural livestock operations, and wildlife inorganic contaminants, such as salts and metals, which can be naturally occurring or result from urban stormwater runoff, industrial or domestic wastewater discharges, oil and gas production, mining, or fanning; pesticides and herbicides, which may come from a variety of sources such as agriculture, urban stormwater runoff, and residential uses; organic chemical contaminants, including synthetic and volatile organic chemicals, which are by-products of industrial processes and petroleum production, and can also come from gas stations and septic systems; radioactive contaminants, which can be naturally occurring or be the result of oil and gas production and mining activities. In order to ensure that tap water is safe to drink, EPA prescribes regulations that limit the amount of certain contaminants in water provided by pubic water systems. All drinking water, including bottled drinking water, may be reasonably expected to contain at least small amounts of some constituents.
It's important to remember that the presence of these constituents does not necessarily indicate that the water poses a health risk.
In this table you will find many terms and abbreviations you might not be familiar with. To help you better understand these terms we've provided the following definitions:
Action Level - The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system must follow.
Mainmum Contaminant Level (MCL) - The "Maximum Allowed" (MCL) is the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
Maxrimum ContaminantLevel Goal (MCLG) - The "Goal"(MCLG) is the level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety.
Maximum Residual Disinfectant Level (MRDL) - The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
Maximum Residual Disinf'ectantLevel Goal (MRDLG) - The level of a drinking water disinfectant below which there is no known or expected risk of health. MRDLG do not reflect the benefits ofthe use of disinfectants to control microbial contaminants.
Partsper million (ppm) or Milligrams per liter (mg/l) - one part per million corresponds to one minute in two years or a single penny in $10,000.
Partsper billion (ppb) or Microgramsper liter - one part per billion corresponds to one minute in 2,000 years, or a single penny in S10,000,000.
TEST RESULTS Contaminant Violation Date Level Range of Detects Unit MCLG MCL Likety Source of YIN Collected Detected or # of Samples Measurement Contamination Exceeding MCL/ACL Inorganic Contaminants
- 10. Barium N 2008* 0.20 .014-020 ppm 2 2 Discharge of drilling wastes; discharge from metal refineries; emsion of natural deposits 13.Chromium N 2008* 2 1-2 ppb 100 100 Discharge from steel and pulp mill; erosion of natural deposits
- 16. Fluoride N 2008* 1.09 .7 - 1.09 ppm 4 4 Erosion of natural deposits; water additive which promotes strong teeth; discharges from fertilizer and aluminum factories
- 17. Lead N 2008* 1 0 ppb 0 AL = 15 Corrosion of household plumbing systems, erosion of natural deposits
- 21. Selenium N 2008* I .5 - 5 ppb 50 50 Discharges from petroleum and metal refineries: erosion of natural deposits; discharge from mines Disinfection By-Products 81 HAAS N 4QT 2010 15 No Range ppb 0 60 By-product of drinking water disinfection 82 TTHM (Total Y 4QT 2010 37 No Range ppb 0 80 By-product of trihalomethanes) drinking water disinfection Chlorine N 2010 .93 .63 - 123 ppm 0 MDRL 4 Water additive used
- I_ I I Most recent sample. No sample requiredfor 2010.
I I I I I to control microbes As you can see by the table, our system had no violations. We're proud that your drinking water meets or exceeds all Federal and State requirements. We have learned through our monitoring and testing that some constituents have been detected, however the EPA has determined that your water IS SAFE at these levels.
We are required to monitor your drinking water for specific constituents on a monthly basis. Results of regular monitoring are an indicator of whether or not our drinking water meets health standards. In an effort to ensure systems complete all monitoring requirements, MSDH now notifies systems of any missing samples prior to the end of the compliance period.
If present, elevated levels of lead can cause serious health problems, especially for pregnant women and young children. Lead in drinking water is primarily from materials and components associated with service lines and home plumbing. Our Water Association is responsible for providing high quality drinking water, but cannot control the variety of materials used in plumbing components.
When your water has been sitting for several hours, you can minimize the potential for lead exposure by flushing your tap for 30 seconds to 2-minutes before using water for drinking or cooking. If you are concerned about lead in your water you may wish to have your water tested. Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available from the Safe Drinking Water Hotline or at htfp://www.epa.gcw/safewater/lead. The Mississippi State Department of Health Public Health Laboratory offers lead testing. Please contact 601.576.7582 if you wish to have your water tested.
All sources of drinking water are subject to potential contamination by substances that are naturally occurring or man made. These substances can be microbes, inorganic or organic chemicals and radioactive substances. All drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some contaminants. The presence of contaminants does not necessarily indicate that the water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the Environmental Protection Agency's Safe Drinking Water Hotline at 1-8004264791.
Some people may be more vulnerable to contaminants in drinking water than the general population. Immuno-compromised persons such as persons with cancer undergoing chemotherapy, persons who have undergone organ transplants, people with HIV/AIDS or other immune system disorders, some elderly, and infants can be particularly at risk from infection. These people should seek advice about drinking water from their health care providers. EPA/CDC guidelines on appropriate means to lessen the risk of Infection by cryptosporidlum and other microbiological contaminants are available from the Safe Drinking Water Hotline 1-600-426-4791.
The CS&I Water Association works around the clock to provide top quality water to every tap. We ask that all our customers help us protect our water sources, which are the heart of our community, our way of life and our children's future.