October 25th, 2017
Dear District 92½ Parents and Staff Members,
The purpose of this letter is to inform you that the District implemented mitigating strategies for locations which tested higher than five parts per billion (ppb) on the August 23rd water quality test. On Tuesday, October 3rd, the District retested those locations which tested higher than five parts per billion on August 23rd water quality test.
To protect public health, the Lead in Drinking Water Testing Bill (LDWTB) requires that all public schools constructed prior to January 1, 2000, test lead levels in water from every outlet that is being used, or could potentially be used, for drinking or cooking.
To provide you with some background, the “on-again, off-again” nature of water use at most schools can raise lead levels in school drinking water. Water that remains in pipes overnight, over a weekend, or over vacation periods stays in contact with lead pipes or lead solder and, as a result, could contain higher levels of lead. Lead most frequently gets into drinking water by leaching from plumbing materials and fixtures as water moves through a school’s distribution system. Even though the drinking water we receive from our water supplier meets federal and state standards for lead and copper, our facility may have elevated lead levels due to plumbing materials and water use patterns.
Two samples were collected from each water source. The samples were collected on a “first draw” basis. “First draw” is achieved by allowing the water system to rest for at least eight hours prior to sampling in order to collect any existing debris or settlement within the sample. The intent of this sampling is to replicate “worst case scenario” conditions. A second sample from each water source was collected as a “follow up” sample basis. “Follow‐up” sampling is achieved by allowing the water system to run for 30 seconds after the first draw sampling. The intent of this sampling is to determine if lead contamination may be in the water lines connected to the water sources and not just at the fixture.
The United States Environmental Protection Agency (USEPA) action level for lead in drinking water is 15.0 ppb for potable water sources. Only those locations that had results higher than 5 ppb on the August 23rd water quality test were retested. Results from the retests are as follows:
Westchester Primary School Westchester Middle School
36 water samples collected 12 water samples collected
6 results greater than 15 ppb 0 result greater than 15 ppb
8 results greater than 5 ppb 0 results greater than 5 ppb
Westchester Intermediate School
2 water samples collected
0 results greater than 15 ppb
0 result greater than 5 ppb
You will find additional information and the results of the lead testing done at all three of our buildings attached. You can also find detailed information on our website at Water Testing. The District has immediately shut off water to the affected sources that are above 15 ppb and will be taking remedial steps pending another water quality test. As a follow-up, additional water tests will be conducted to ensure the remediation was successful before placing any of the sinks and drinking fountains back in service for students and staff members.
Please be assured that we will continue to take the necessary steps to ensure the well-being of our staff and students and that the quality of drinking water throughout our District meets regulations. We will keep you informed as we continue to receive the results of the ongoing water testing at all of our schools. Please email me at firstname.lastname@example.org or call me at 708-450-2700 should you have any questions or concerns.
Westchester School District 92½