NCG030099_Email RE MRO Recommendation_20080918

Galvan Stormwater data
Subject: Galvan Stormwater data
From: Marcia Allocco <[e-mail]>
Date: Thu, 18 Sep 2008 10:12:15 -0400
To: [e-mail]
Hi Bethany,
Hope you are well. We had chatted awhile back about the Galvan facility in Cabarrus County. They are a galvanizer
and at one time had a permit from DWQ to discharged from lagoons on site. This resulted in groundwater
contamination and as you can see from their attached stormwater results (first under permit with Tiers) that they are
already a Tier I facility. There is groundwater infiltration at Outfall 002 but the concentrations of zinc when we tested
in a non -rain event were an order of magnitude less than the zinc concentrations in the stormwater sampling that was
done in June. They have proposed some changes on site and Wes and I will be doing a follow-up inspection in early
October.
There is still groundwater contamination (treatment system turned off due to non-use of supply wells in the vicinity)
and also soil contamination in the lagoon area. We will also going to take some upstream and down stream samples
in Back Creek from the two UTs they drain into both of which we sampled earlier this year and had elevated zinc ,
chloride, sulfide, and TDS concentrations.
Because of this and that Back Creek is impaired for biological integrity (added in 2003) we are probably going to
push for individual permit for them. I guess we'll wait to see if any of items they have proposed in their Tier 1
response have an effect on the contaminants the stormwater.
Relevant information is attached and I guess I'm just asking it be placed in their permit file for a future date when we
move towards individual permit.
Thanks,
Marcia
Marcia Allocco- a:�cia.All - .,o@ nail.net
Environmental Chemist
North Carolina Department of Environment & Natural Resources
Division of Water Quality - Surface Water Protection Group
610 East Center Ave., Suite 301
Mooresville, NC 28115
Ph: [phone] Fax: [phone]
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