NC0090328_Staff Report_20241011

State of North Carolina
Division of Water Resources
Water Quality Regional Operations Section
Environmental Staff Report
Quality
To: ® NPDES Unit ❑ Non -Discharge Unit Application No.: NCO090328
Attn: Kate Shadwell in Raleigh Facility name: 71h Street Mixed -Use Development
From: Edward Watson
Mooresville Regional Office
Note: This form has been adapted from the non -discharge fg acili , staff report to document the review of both non -
discharge and NPDES permit applications and/or renewals. Please complete all sections as they are pplicable.
I. GENERAL AND SITE VISIT INFORMATION
1. Was a site visit conducted? ® Yes or ❑ No
a. Date of site visit: 10-10-2024
b. Site visit conducted by: Edward Watson
c. Inspection report attached. ❑ Yes or ® No
d. Person contacted: Matt Ingles of Hart and Hickman and their contact information: (704) 887 — 4617.
e. Driving directions: At intersection of E 7rh St and Lamar Ave, Charlotte
2. Discharge Point(s): Outfall I
Latitude: 35.215120 Longitude:-80.820338
3. Receiving stream or affected surface waters:
Classification: C
River Basin and Subbasin No. Little Sugar Creek
Describe receiving stream features and pertinent downstream uses: Discharge into a storm drain that
empties into Little Sugar Creek.
II. PROPOSED FACILITIES: NEW APPLICATIONS
1. Facility Classification: (Please attach completed rating sheet to be attached to issued permit)
Proposed flow: 50,000 GPD
Current permitted flow: New Application
2. Are the new treatment facilities adequate for the type of waste and disposal system? ® Yes or ❑ No
If no, explain:
3. Are site conditions (soils, depth to water table, etc.) consistent with the submitted reports? ® Yes ❑ No ❑ N/A
If no, please explain:
4. Do the plans and site map represent the actual site (property lines, wells, etc.)? ® Yes ❑ No ❑ N/A
If no, please explain:
5. Is the proposed residuals management plan adequate? ❑ Yes ❑ No ® N/A
If no, please explain: No residuals expected to be generated as a result ofpermit activities.
FORM: WQROSSR 04-14 Page 1 of 4

6. Are the proposed application rates (e.g., hydraulic, nutrient) acceptable? ❑ Yes ❑ No ® N/A
If no, please explain: This is a pump and treat NPDES GW remediation system. No application will occur as a
result of the permitted activities.
7. Are there any setback conflicts for proposed treatment, storage and disposal sites? ❑ Yes or ® No
If yes, attach a map showing conflict areas.
8. Is the proposed or existing groundwater monitoring program adequate? ❑ Yes ❑ No ® N/A
If no, explain and recommend any changes to the groundwater monitoring program: No GW monitoring will be in
place for this permit.
9. For residuals, will seasonal or other restrictions be required? ❑ Yes ❑ No ® N/A
If yes, attach list of sites with restrictions (Certification B)
Describe the residuals handling and utilization scheme: No residuals are expected to be generated. The system
will treat the GW extracted from the dewatering points. The treated GW will be discharged to a designated outfall
once the treated water is determined to meet 2B surface water standards. No GW will be released to the storm
drain that does not meet 2B standards.
10. Possible toxic impacts to surface waters: VOCs, SVOCs from heating oil, PCE, and PAHs are possible.
11. Pretreatment Program (POTWs only): N/A
1. Has a review of all self -monitoring data been conducted (e.g., DMR, NDMR, NDAR, GW)? ® Yes or ❑ No
Please summarize any findings resulting from this review: GW analysis has been performed from onsite monitor
wells. The wells indicate the presence of low levels of VOCs and SVOCs. The PCB values maybe remnant from a
former dry cleaning facility and is expected to be removed during soil excavation for the subbasement parking
area.
Provide input to help the permit writer evaluate any requests for reduced monitoring, if applicable.
2. Are there any permit changes needed in order to address ongoing BIMS violations? ❑ Yes or ® No
If yes, please explain:
3. Check all that apply: This is a new application.
❑ No compliance issues ❑ Current enforcement action(s) ❑ Currently under JOC
❑ Notice(s) of violation ❑ Currently under SOC ❑ Currently under moratorium
Please explain and attach any documents that may help clarify answer/comments (i.e., NOV, NOD, etc.)
If the facility has had compliance problems during the permit cycle, please explain the status. Has the RO been
working with the Permittee? Is a solution underway or in place?
4. Are there any issues related to compliance/enforcement that should be resolved before issuing this permit?
❑ Yes ❑No0N/A
If yes, please explain:
Possible toxic impacts to surface waters: Chlorinated solvents and heating oil constituents have been observed above
2L and 2B in the temporary monitor wells.
FORM: WQROSSR 04-14 Page 2 of 4

III. REGIONAL OFFICE RECOMMENDATIONS
1. Do you foresee any problems with issuance/renewal of this permit? ❑ Yes or ❑ No
If yes, please explain:
2. List any items that you would like the NPDES Unit or Non -Discharge Unit Central Office to obtain through an
additional information request:
Item
Reason
1
Adjustment to the application to indicate the presence of the temporary
treatment system to be onsite during construction with notification to change to
permanent treatment if necessary.
3. Recommendation: ❑ Hold, pending receipt and review of additional information by regional office
❑ Hold, pending review of draft permit by regional office
❑ Issue upon receipt of needed additional information
® Issue
❑ Deny (Please state reasons: )
4. Signature of report preparer: Edward Watson, Hydrogeolo,giA 10/11/2024
Signature of regional supervisor:
Date: 10/11/2024
Docu Signed by:
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FORM: WQROSSR 04-14 Page 3 of 4

IV. ADDITIONAL REGIONAL STAFF REVIEW ITEMS
The permittee believes the impaired soils will be mitigated uupon removal of the impaired soils. This can only be
determined once dewatering operations commence and the extracted GW can be analyzed to disprov the presence of
constituent compounds discovered in the TMWs during initial investigations.
The extracted GW will be pumped into onsite frac tanks. The water will be sampled as a composite as a representative
sample. The initial startup flow is expected to be — 50,000 GPM. This flow is expected to significantly reduce to
—12,000 gpd once static water has been achieved.
Analysis can be a modified 8260 plus PAHs. No metals are expected to be present at the site. This area has been
historically residential. The primary constituent are likely to be the result of home heating oil and chlorinated solvents
from a former dry cleaner.
A waiver request has been submitted in the application package. MRO is recommending that a waiver not be granted
for TSS, COD, pH, or Wet Toxicity.
Charlotte -Mecklenburg Storm Water Services has approved discharge to the storm -drain.
If a permanent system is required, the effluent discharge will be placed in a trenched pipe that enters the storm drain
drop box at the outfall location. The drop box will need to be accessible for inspection purposes to evaluate the
condition of the effluent discharge water. Effluent samples are to be collected prior to entering the storm drain.
Permittee Contact information:
CRD Elizabeth LLC Attn: Larry Powers, P.O. Box 225 W. Hubbard 4' Floor, Chicago, IL 60605
1powers(c-r�,centrumrd.com Phone [phone] Please be sure the permittee contact is entered into BIMS.
Mecklenburg County has issued SIP permit 70003206. DWM Site Locator Tool doesn't plot any incidents at this
location at this time, but multiple incidents are noted within a block or two.
FORM: WQROSSR 04-14 Page 4 of 4