NC0047384_Application Attachment_20220127

City of Greensboro
L J North Carolina
January 27, 2022 [via email]
Attn: Gary Perlmutter
NC Department of Environmental Quality
Division of Water Quality — NPDES Municipal Permitting
1617 Mail Service Center
Raleigh NC 27699-1617
RE: NPDES Permit Application Chemical Addendum
City of Greensboro T. Z. Osborne NPDES Permit NC0047384
Dear Gary,
Water Resources Department
As a supplement to the T. Z. Osborne (TZO) NPDES Permit Application package submitted in November
2018, the City of Greensboro (City) is submitting additional information per Session Law 2018-5, Senate
Bill 99, Section 13.1(r) per your request. As you are aware, the City of Greensboro has been conducting
TZO effluent grab sampling and analyses for 1,4-dioxane since December 2017 using EPA Method 624.1
(from 40 CFR Part 136). All effluent grab sampling data has been submitted to NCDEQ on TZO eDMRs
since December 2017. Thus, we have included 1,4-dioxane on the Chemical Addendum.
In addition, at the request of NCDEQ, the City performed TZO influent sampling for certain PFAS
compounds in July, August, and September 2019. Results from these three samples are not certified by
the City as there is not a 40 CFR Part 136 EPA approved analytical method for any PFAS analytes.
Although this data is not being certified by the City and was already provided to NCDEQ, we are
submitting a summary of the results as an attachment.
The following two attachments are provided as a supplement to the TZO NPDES Permit Application:
• Chemical Addendum to NPDES application listing 1,4-dioxane
• Uncertified 2019 TZO Influent PFAS Sampling Data Summary Sheet
Please let us know if you have any questions on the information provided.
Sincerely,
Elijah Williams
Water Reclamation Manager
cc: Mike Borchers, Water Resources Director
Kristine Williams, Assistant Water Resources Director
Bradley Flynt, T. Z. Osborne Plant Superintendent/ORC
Martie Groome, Laboratory and Industrial Waste Section Supervisor
Alicia Goots, Laboratory Coordinator
PO Box 3136 = Greensboro, NC 27402-3136 = www.greensboro-nc.gov = 336-373-CITY (2489) > TTY# 333-6930

EPA Identification Number
NPDES Number
Facility Name
Outfall Number
r au wi
Estimated Concentration
5 ; 2y; If Known
( )
Facility Registry Services ID
110001978165
:Pollutant (Required)
N`a
NC0047384
CAS number
Method Number;
(i u, :
r'(if Applicable)}' `
City of Greensboro
T. Z. Osborne
Reason Pollutant Believed
4.xr,
01
c ` r
Present m�pischarge
F W
1,4-Dioxane
123-91-1
EPA 624.1
Previous Effluent Analyses (Note: All effluent grab sampling
data has been submitted to NCDEQ on eDMRs since December
2017)
CY2021 Range: 0.56-823 ug/I
CY2021 Average: 35.3 ug/I

a uexol0 - q'1
A
W
6102 Ain(' 10 glum
(s)Ja}IlenO gel
6102Isn8nV4o gluow
0
i0
0
0
71.
0
ID
v
it
m
N
0
CI
0
A
0
F
J
N
W
N
W N
0.1 O
yt
i0
v A
H O.6
376-06-7
72629-94-8
2706-91-4
2706-90-3
N
N
VI F�
I, VI
1-, 0
6,
J W
to J
A N
�+ 6 6l0
00 i-+
W
N O
VI J
A
A
375-85-9
355-46-4
IN W
J O
to J
tr
N to
00 t+
W W
W W
VI Ln
J J
• w
N
375-22-4
375-73-5
POTW Name: GreensboroTZOsborne INPDES#: I NC0047384
Influent Grab (ng/L)
CAS Number I Analyte Name Acronym I 7/8/2019 I Lab Qualifer(s) I 8/7/2019 I Lab Qualifer(s) 9/17/2019 Lab Qualifer(s)
Total PFAS
Perfluorooctanesulfonic acid
Sum of PFOA and PFOS
Perfluoroundecanoic acid
Perfluorooctanoic acid
Perfluorotetradecanoic acid
Perfluorotridecanoic acid
Perfluoropentanesulfonic acid
Perfluoropentanoic acid
2-(N-Ethylperfluorooctanesulfonamido) acetic acid
2-(N-Methylperfluorooctanesulfonamido) acetic acid
D
o N
O
O
o
O
N 01
C 0
oO
O
3, a
a
m
Perfluorohexanoic acid
Perfluorononanesulfonic acid
Perfluoroheptanoic add
Perfluorohexanesulfonic acid
Perfluorododecanoic acid
Perfluoroheptanesulfonic acid
Perfluorodecanesulfonic acid
Perfluorodecanoic add
Perfluorobutanoic acid
Perfluorobutanesulfonic acid
PFOS
PFUnA
PFOA
PFTeA
PFTriA
PFPeS
PFPeA
N-EtFOSAA
N-MeFOSAA
PFNA
PFOSA
SNAd
VXHid
PFHpA
PFHxS
PFDoA
PFHpS
PFDS
PFDA
PFBA
PFBS
O
J
W N
to
o0 in
I-, Z
iv 0
ND
ND
ND
22.0
Z Z
0 0
ND
ND
Z
p v
00,
A
ND
ND
tD N Z
O
N U./�
in I-+
C
N
Ol
00
U (<2.56)
U (<2.56)
U (<2.56)
C C
A A
.�
C C
. A
U
01
U (<2.56)
U (<2.56)
U (<2.56)
C
n
N
N
Ol
290.9
36.2
60.9
ND
24.7
Z Z
O O
m Z
iD 0
ND
ND
ND
ND
54.6
ND
22.3
19.6
ND
ND
ND
ND
ID J
00 in
C
n
..
1 U (<10.2)
U (<10.2)
C
n
O
-i
U (<18.0)
U (<18.0)
U (<10.2)
U (<10.2)
C
n
U (<10.2)
U (<10.2)
U (<10.2)
U (<10.2)
N1-,
1' A
G FV+
ND
14.9
ND
11 ND
ND
20.0
ND
ND
ND
ND
18.0
ND
N J
w A
ND
ND
O Z
W O
in w
O D
C
?
U (<7.4)
U (<7.4)
C
I-'
U (<15.0)
U (<15.0)
C C
Ins
J
J A
C
Fn,
V
O
C C
�, n
J
J•
C
00 W W O1 to \\ N Ni-b O t\D W\ Ot 0 to A N
CO J N \\\\ N N N -,mu \
Ol O W\ \ \ O m to m \ 0 O N I� W\ f+ A
N N N N \ N N N N N N N N N N N N N
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
t0 ID \0 t0 t0 t0 tD t0 tD tD tD CO 00 00 00 00 CO W 00k. W 00 0] W 00 00 J
O
m
3
U
m
A 1.0 W
J lD V l0 N A V A N CO l0 A N 00 p N
0l N J Vt J Ol J N N N J 1p N In f+ CO Ot J al
to lD
N
01 CO 01
V N W
on
00