WQ0005555_Staff Report_20191121

DocuSign Envelope ID: DC720AA1-OF41-4EB3-9136-DB52AOF78BA3
State of North Carolina
Division of Water Resources
Water Quality Regional Operations Section
Staff Report
November 21, 2019
To: DWR Central Office — WQ, Non -Discharge Unit Application No.: W00005555
Attn: Tessa Monday Facility name: Weyerhaeuser NR Co., Wastewater Irri ag t
From: Patrick Mitchell
Winston-Salem Regional Office
Note: This form has been adapted from the non -discharge facility staff report to document the review of both non -discharge and NPDES permit applications and/or renewals. Please complete all sections as they are applicable.
L GENERAL AND SITE VISIT INFORMATION
1. Was a site visit conducted? ❑ Yes or ® No
II. EXISTING FACILITIES: MODIFICATION AND RENEWAL APPLICATIONS
1. Are the design, maintenance and operation of the treatment facilities adequate for the type of waste and disposal
system? ® Yes or ❑ No
Explain: The wastewater irrigationystem is no longer the primary means of disposal. Facility is now connected
to public sewer (YVSA) and the upgrades to the WWTP are capable of producingbetter etter quality effluent.
2. Are the site conditions (e.g., soils, topography, depth to water table, etc) maintained appropriately and adequately
assimilating the waste? ® Yes or ® No
Explain: The previously pacted irrigation zones are receiving soil treatments, tillage & seeding. Currently no
irrigation is occurring to the impacted zones and onlv suitable zones are utilized. Discharge to public sewer and
ump & haul activities are utilized.
3. Are the existing application rates (e.g., hydraulic, nutrient) still acceptable? ® Yes or ❑ No
4. Is the existing groundwater monitoring program adequate? ® Yes ❑ No ❑ N/A
5. Are there any issues related to compliance/enforcement that should be resolved before issuing this permit?
❑ Yes ®No❑N/A
III. REGIONAL OFFICE RECOMMENDATIONS
1. Do you foresee any problems with issuance/renewal of this permit? ❑ Yes or ® No
2. Recommendation: ® Issue
DocuSigned by:
3. Signature of report preparer:
Signature of regional supervi
Date: 11/21/2019
Loti -T Stildu
145B49E225C94EA...
*See section IV. Additional Regional Staff Review Items on next page for WSRO comments and recommendations on
the Permittee's request for minor modification of the subject permit.
FORM: WQROSSR 04-14 Page 1 of 2

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IV. ADDITIONAL REGIONAL STAFF REVIEW ITEMS
The facility has made four requests in this application for minor modification of Permit No. WQ0005555. Below are
this office's comments and recommendations.
1. Request that PH monitoring be changed to 3/yr.: Recommend this be changed to once per week or per
irrigation event if less frequent irrigation occurs. Reportedly the irrigation system will not be used on a regular
basis moving forward. The weeks with no irrigation, no pH measurement would be necessary.
2. Request that all monitoring requirements be changed to 3/yr.: The irrigation system use has dropped
significantly and is reportedly going to be reduced even more. According to the Permittee the irrigation system
will be utilized as a backup and most months will report zero flow. Sampling three times per year may be more
appropriate for a "conjunctive" system that uses public sewer as their primary means of disposal.
3. Request that PAN loading be removed from the Attachment B: Recommend that PAN loading and NDMLR
reporting language be removed. Due to reduced irrigation activities and discharge to public sewer moving
forward, PAN loading should no longer be an issue. Also, based on the improved effluent quality PAN
concentration should be lower. Moving forward the facility should be more hydraulically limited and less
nutrient limited.
4. Request that Chromium limit in Attachment C be lowered to match 2L limits: The facility will be in violation
of 2L if they exceed 2L limits, our permit Attachment C should match 2L limits. Recommend the Chromium
limit listed in the permit match the 2L standards.
FORM: WQROSSR 04-14 Page 2 of 2