WQ0033406_More Info Requested_20090318

C� F \N1 A7'��� Michael F. Easley, Governor
William G. Ross Jr., Secretary
rNorth Carolina Department of Environment and Natural Resources
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Alan W. Klimek, P.E. Director
Division of Water Quality
March 18, 2009
DR. MATHEW GARRETI'
CHATHAM COUNTY AND CENTRAL CAROLINA COMMUNITY COLLEGE
PO Box 1809
PITrSBORO, NC 27312
Subject: Application No. WQ0033406
Additional Information Request
Conjunctive Reclaimed Water
System
Wake County
Dear Mr. Garrett:
The Land Application Unit has completed its review of the subject permit application package received
on August 8, 2008, and the additional information received on January 16, 2009. Additional information
is required before we may finish our review. Please address the following items no later than April 30,
2009.
1. It is unclear where the disinfection will occur for all of the reclaimed streams. On drawing 103-9,
UV is shown immediately after the reuse chamber and then again prior to the chlorine and dye
injection. Drawing 105-5 shows UV and turbidity prior to the reuse tank. In the detail for the
reuse tank there is not a reference to LTV disinfection, but there is in the pump building that feeds
the toilet flush and cooling water, Verify where disinfection will occur.
2. Due to complexity of the system and multiple uses of the reclaimed water, provide suggested
sampling locations. Turbidity will need to be sampled continuously and at a point where the water
can be diverted away from reclaimed water uses in the event that turbidly exceeds 10 NTUs.
There may be a need for multiple sampling points (e.g. one around the reuse tank for the majority
of the reclaimed water, and one after final addition treatment for use as toilet flush water/cooling
water) Ideally, samples would be collected after all of the treatment is complete, but it may be
possible to demonstrate compliance prior to some disinfection processes at a central location in
order to reduce the number of sampling locations.
3. Figure W103-9 of the submitted plans shows a bypass from the pump tank to the recirculation
tank. Bypass of treatment systems is not allowed and must be removed. If flow diversion is
necessary it must go to the sanitary sewer, or back through the treatment system.
4. The permit will include a condition requiring that the operation and maintenance plan include a
response plan to control public access during maintenance or system upset. The plan must include
posting of signs, and/or placement of barricades to keep the public out of the treatment area.
Verify that the operational plan will be complete prior to operation and provide an anticipated
date of completion.
5. The permit will include a condition requiring that documentation that applicable plumbing code
requirements have been met for all buildings where reclaimed water is utilized for toilet flushing.
Provide verification that plumbing code requirements will be met, and appropriate documentation
submitted prior to operation of the reclaimed water toilet flush system. AlfcthCarohna
tura!!k
North Carolina Division of Water Quality 1636 Mail Service Center Raleigh, NC 27699-1636 Phone [phone] Customer Service
www.ncwaterquAity.org 2728 Capital Boulevard Raleigh, NC 27604 FAX [phone]
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Mr. Matthew Garrett
March 18, 2009
Page 2 of 2
Please be aware that you are responsible for meeting all requirements set forth in North Carolina rules and
regulations. Any oversights that occurred in the review of the subject application package are still the
responsibility of the applicant. In addition, any omissions made in responding to the above items may
result in future requests for additional information.
Please reference the subject application number when providing the requested information. Three (3)
copies of all revised and/or additional documentation should be signed, dated, and submitted to the
address below. Please note that failure to provide this additional information on or before the above
requested date may result in your application being returned as incomplete.
If you have any questions regarding this request, please do not hesitate to contact me at [phone].
Thank you for your cooperation.
Sincerely,
Jon sgaard.
Environmental Engineer
cc: Hal House, IWS Inc. 1434 Farrington Rd. Suite 600, Apex NC 28052
Permit Application File WQ0030241
Steve Kaltenbach — RRO
LAU Files
APS Central Files