WQ0044888_Staff Report_20231221

DocuSign Envelope ID:20379447-8D1E-49F0-8AF6-BFA68F4CA350
State of North Carolina
Division of Water Resources
Water Quality Regional Operations Section
Environmental Staff Report
Quality
To: ❑NPDES Unit®Non-Discharged Application No.: WQ0044888
Attn: Cord Anthony Facility Name: Lot 57-Peninsula
@ Hyco Lake
County: Person County
From: Dorothy Robson
Raleigh Regional Office
I. GENERAL AND SITE VISIT INFORMATION
I. Was a site visit conducted? ❑ Yes or®No
a. Date of site visit:
b. Site visit conducted by:
c. Inspection report attached? ❑ Yes or❑No
d. Person contacted: and their contact information: xxx ext.
e. Driving directions: N/A
2. Receiving stream or affected surface waters: N/A
Classification:
River Basin and Sub-basin No.
Describe receiving stream features and pertinent downstream uses:
II. PROPOSED FACILITIES: NEW APPLICATIONS
1. Facility Classification: SFR Description: 1,000-gallon septic tank, effluent filter, 600 gpd model EZ treat
filter unit, 1,000-gallon recirculation tank with %2 HP pump,UV disinfection,rain sensor, 3,500-gallon
storage/pump tank with%HP pump, fenced, drip irrigation area of 19.06 in/yr on 0.191 acres.
Proposed flow: 270 gpd
Current permitted flow:NA
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: A site visit has yet to be completed
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:
6. Are the proposed application rates(e.g.,hydraulic,nutrient) acceptable? ❑Yes ®No ❑N/A
If no,please explain: To be determined
7. Are there any setback conflicts for proposed treatment, storage and disposal sites? ® Yes or❑No
If yes, attach a map showing conflict areas.Waivers have been submitted for the conflicts.
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:
FORM: WQROSSR 04-14 Pagel of 3

DocuSign Envelope ID:20379447-8D1E-49F0-8AF6-BFA68F4CA350
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:
10. Possible toxic impacts to surface waters: NA
11. Pretreatment Program(POTWs only): NA
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
See below
3. List specific permit conditions recommended to be removed from the permit when issued:
Condition Reason
4. List specific special conditions or compliance schedules recommended to be included in the permit when issued:
Condition Reason
5. 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: )
6. Signature of report preparers 04
DocuSigned by:
F
Signature of regional supervisor: kA Uo-t
Date: 12/2 2/202 3 B2916HAB32144F...
IV. ADDITIONAL REGIONAL STAFF REVIEW ITEMS
1. Drainage coefficient is 54%please state why you chose this percent.
2. Soils Map: It is very confusing. Please only include information for the subject property.
3. Ksat soil descriptions: The soil horizon C and Cr depths are reported,however,no other description is provided.
Please provide descriptions for the C and CR soil profile.
4. The depth to perched water table is confusing. The soil borings do not indicate hydric soils,with exception to
some mottling.You indicate the mottling starts at 5-9". Please explain why you indicate 14-15"for the perched
water table.
FORM: WQROSSR 04-14 Page 2 of 3

DocuSign Envelope ID:20379447-8D1E-49F0-8AF6-BFA68F4CA350
5. The 801h percentile precipitation data was obtained from the RDU International data for 58 years from 1948 to
2006. Although the data may be valid, The data on the website lists the data from 1946 to 2022. I am unable to
validate the information. In addition,there is a 17-year gap from 2006 to now. Precipitation rates have changed
from the past 17 years.We recommend a more up to date range for the precipitation data.
6. Ksats: The Ksat data provided does not provide consistent time intervals. The intervals range from 2 minutes to
86 minutes to determine steady state. Please provide an explanation or provide details to support your findings.
7. Ksats: The average measured consists of all the data collected(cm/hr). However,the average should only consist
of the data in the steady state condition.
8. The Ksat data includes data for N57-1,N58-3, and N57-3.N58-3 does not correspond with any of the other
documents in the report. Please submit the correct data for N57-2 or correct the other areas in the report to reflect
N58-3.
9. The soils report does not state the type of vegetation that is currently there and if it will change?And if it does
change,what is the temporary irrigation rate for bare soil.
10. The soil report has a section discussing the addition of fill materials. However,your reference to a"perched"
water table is 14-15".No low spots or high-water table is indicated to warrant the addition of fill material. Please
describe in more detail where and how much fill material is needed, and why it is needed.
I t. The designed irrigation area is indicated as 0.191 acres. The irrigation area indicated on the SFR Irrigation Area
Calculation Worksheet that 0.254 acres are necessary for the irrigation area. The designed irrigation area should
be equal to or greater area than the recommended irrigation rate. However,this is based off the 360 gallons/day,
and the engineering plans are recommending a reduced flow of 270 gallons/day. If the reduced low flow is
approved,please rework the irrigation calculations at 270 gallons/day instead of 360 gallons/day to determine if
the designed irrigation area of 0.191 acres is sufficient for the irrigation area. If the low flow is not approved,
please provide calculations for both 270 gallons/day and 360 gallons/day and a designed irrigation area that would
meet the calculated irrigation area for both 270 gallons/day and 360 gallons/day.
12.
FORM: WQROSSR 04-14 Page 3 of 3