NCG060421_Email RE pH Exceedance_20221012

Carson, Brittany
From:ERM US North Carolina Stormwater Team <[e-mail]>
Sent:Wednesday, October 12, 2022 4:40 PM
To:Carson, Brittany; Georgoulias, Bethany
Cc:sscola; Melissa O'Malley
Subject:\[External\] Stormwater Analytical Sampling Exceedance - NCG060421
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Hello Brittany and Bethany,

I’m emailing you in the absence of a Regional Office Contact for the Winston-Salem Office. Let me know if I should be
contacting someone else we is filling in for that position in the interim.

ERM is supporting Amazon in North Carolina for their stormwater compliance under NC General Stormwater Permit
NCG060000. For the Quarter 3 monitoring period, there was an analyte exceedance at Sample Point-01 for Amazon
RDU9 site (Permit Number NCG060421) as:

Sample Point Sample Point 02
Parameter Benchmark 01
pH 6.0-9.0 5.25 6.7

Sampling and pH measurements were conducted on 30 September 2022.

Per the new General Permit Requirement for Tier One Status, we need to notify NCDEQ Regional office in writing of the
exceedance. We are working with our client to schedule a management inspection to identify potential sources and
feasible corrective actions to resolve the issue. An inspection was conducted within 14 days on 11 October 2022. A
corrective action will be filed on-Site with the SWPPP.

Thank you,

John Haffner
Consultant II, Management Systems and Compliance Support
Pronouns (He/Him/His)
ERM NC, Inc. | 4140 Parklake Avenue, Suite 110 | Raleigh, NC 27612
T +1 919.855.2298 | M +1 415.944.7701
E [e-mail]| E Stormwater Projects [e-mail]| W www.erm.com

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