NCG030503_Monitoring Report_20200203

ENGINEER® jESC 250 Old Murdock Road
i}a Troutman, NC 28166
SINTERED}fi''' ATSUMI [phone]
COMPONENTS TECH, LLC www.engsin.com
January 28, 2020
RE: COC- NCG030503
CERTIFIED MAIL/RETURN RECEIPT
NCDEQ Mooresville Regional Office
Division of Water Quality
Attn: Mr. James Moore
610 East Center Avenue - Suite 301
Mooresville, NC 28115
Dear Mr. Moore:
RECEIVE°
CowYiiallt, S � Y' �eg/� a/ p)o
Enclosed are the results of January 2020 Monthly Storm Water Discharge Outfall
Monitoring Report. After two consecutive tests with pH being out of range, June
and October of 2019, we started monthly sampling per the tiered responses laid
out in our Storm Water Permit. December testing showed similar results with pH
out of range on the low end. In December, we sampled virgin rainwater using
plastic pools to capture the rainwater before it contacted our property. We found
then that the pH of the rainwater coming to us was a 4.8 pH. We sampled virgin
rainwater again in January for this test and again, we found the pH of the virgin
rainwater to be 4.3 pH. We have exceedances for Copper in Outfalls 2 and 3,
and an exceedance for Zinc at Outfall 2. We were granted relief from the Tiered
responses for our Copper and Zinc exceedances in January of 2015.
We have had two consecutive tests from December 2019 and January 2020
where the rainwater falling on our property has measured at a 4.8 and 4.3 pH
respectively. We would like to request relief from the monthly sampling tiered
responses as the rainwater falling on our property is already out of the
benchmark range. Please let us know if we can discontinue the monthly
sampling.
If you have questions or concerns, please feel free to contact me.
Respectfully Submitted,
Aubrey Meadows
EHSF Manager
Cc: Jan Comer, VP of Human Resources

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