NC0088838_Comments_20140925

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Chemical Solutions
a division of Radiator Specialty Company
RECEIVED/DENR/DWR
September 25, 2014
Mr. Ron Berry SEP 2 5 2014
Engineer Water Quality
North Carolina Department of Permitting Section
Environment and Natural Resources
Division of Water Resources
1617 Mail Services Center
Raleigh,North Carolina 27669-1617
Re: Response To August 5, 2014 E-Mail
Radiator Specialty Company
Indian Trail, North Carolina
Permit No. NC0088838
Dear Mr. Berry:
Radiator Specialty Company (RSC) appreciates this opportunity to respond to the two
proposed changes to the pending National Pollutant Discharge Elimination System
(NPDES) Permit renewal for Permit No. NC0088838. For ease of review, we have
presented the North Carolina Department of Environment and Natural Resources
(DENR) intended incorporations from your August 5, 2014 e-mail in italics followed by
RSC's response.
1. Any submitted toxicity testing will require a composite be taken as the test sample.
We understand that composite samples are typically required for NPDES permitted
facilities with either an intermittent discharge and/or the potential for variability in the
waste stream over a twenty-four (24) hour period. The groundwater recovery and
treatment system at Radiator Specialty Company discharges approximately 40,000
gallons of treated groundwater per day. The discharge flow is driven by the pumping of
groundwater from four (4) on-site recovery wells. As a result, the system discharges
continuously each day. Since the source of the water is limited to the four (4) recovery
wells, the influent water quality is well documented and variability in the waste stream
has not previously occurred and is not expected to occur in the future. As a result, grab
samples adequately represent the water quality for toxicity testing.
DENR has accepted this approach at at least one other facility with a similar discharge.
A May 8, 2014 determination by Ms. Cindy Moore. Mr. Tom Belnick and Mr. Wes Bell
of DENR authorized Equipment & Supply. Inc. (NPDES #0087858) to revise the toxicity
sampling protocol from composite to grab. The groundwater treatment and discharge
600 Radiator Road— Indian Trail, NC 28079-5225— Telephone: [phone]— Fax: [phone]— www.rscbrands.com

a
Mr . Ron Berry
September 25 , 2014
Page 12
system at the Equipment & Supply, Inc. facilty is comparable to the system operated by
RSC.
RSC requests the toxicity sampling protocol not be revised.
2. The presence of 1,4-dioxane in the influent and groundwater sources will require
the addition of monthly 1,4-dioxane monitoring with an 80 microgram per liter
(,ug/L) daily limit to protect for the Human Health surface water quality standard
RSC is aware that 1,4-dioxane has historically been detected in groundwater samples
collected from the site and is not opposed to analyzing the effluent for 1,4-dioxane.
However, this parameter is not targeted by standard method 624, the analytical method
currently required by the facility's Permit. Based on an August 11, 2014 telephone
conversation with you, RSC understands DENR would accept modifying the Permit
during the renewal process to specify SW-846 Method 8260 instead of Standard Method
624 for targeted volatile constituents. Further, based on this conversation, RSC
implemented this analytical method change during the August 2014 monthly sampling
event.
The Method Reporting Limit for SW-846 Method 8260 is 150 µg/L. Prism Laboratories,
Inc. has indicated that a normal Method Detection Limit for SW-846 Method 8260 is
10.6 µg/L. Should 1,4-dioxane be detected in the effluent sample at a concentration
between the permit limit and 150 µg/L, the result would be reported as a "J" value.
Based on our telephone conversation on August 11, 2014, RSC anticipates three (3)to six
(6) months will be necessary to collect and evaluate 1,4-dioxane analytical results to
determine if changes to the existing groundwater recovery system are necessary.
RSC appreciates DENR allowing us to review its recommended changes prior to issuing
the draft permit renewal. Please call if you have any questions or require any additional
information.
Sincerely,
Radiator Specialty Company
ckk
Stuart Kerkhoff
Environmental, Health and Safety Manager
cc: Mr. Richard L. Harmon, Harmon Environmental. PA
Mr. Benne Hutson, McGuireWoods LLP
N I'DFS/FERMI"I CIIANGI.DOCX

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' Table 2
i
AIR STRIPPER EFFLUENT
RADIATOR SPECIALTY COMPANY
NPDES PERMIT NO. NC0088838
OUTFALL 001
Daily
Permit
Limits
Parameters ug/L 08/21/14 09/25/14 10/14/14 11/18/14 12/17/14
Flow (MGD) 0.09 0.0006 0.0317 0.0270 0.0182 0.0332
Monthly Sampling
Total Suspended Solids 0.045 <0.0025 <0.0026 <0.0026 <0.0025 <.0026
Monthly Average 0.030
Tetrachloroethene 3.0 <1.0 <1.0 <3.0 1.2B <3.0
1,1,1-Trichloroethane 4.0 <1.0 0.61 <4.0 <0.50 <4.0
Vinyl chloride 2.0 <2.0 <0.50 <2.0 <0.50 <2.0
1,4-Dioxane *** 80.0 <80 <80 <80 <80 <80
Quarterly Sampling
Chloroethane - NA NA <0.50 NA NA
1,1-Dichloroethane -- NA NA <0.50 NA NA
1,1-Dichloroethene -_.- NA NA <0.50 NA NA
1,2-Dichloroethene (total) - NA NA NA NA NA
cis-1,2-Dichloroehene --- NA NA <0.50 NA NA
Trichloroethene -- NA NA <0.50 NA NA
Benzene -- NA NA <0.50 NA NA
Methylene chloride -- NA NA <1.0 NA NA
1,2-Dichloroethane --- NA NA <0.50 NA NA
Toluene .-- NA NA <0.50 NA NA
trans-1,2-Dichloroethene ..-- NA NA <0.50 NA NA
Chronic Toxicity 90% NA NA P NA NA
Comments:
NA: Not Analyzed
P: Pass Chronic Toxicity
Flow: Flow is the reading from the flowmeter day of sample collection less flowmeter reading during last
outfall inspection divided by number of days between the two. See DMR Form.
*** 1,4-Dioxane: New Permit will have a limit of 80 ug/L. RSC started sampling it for evaluation in August 2014.
In addition, RSC swithced to SW846 Method 8260.
TABLE 2
Page 1

f,
AIR STRIPPER INFLUENT ' i
RADIATOR SPECIALTY COMPANY
VOLATILE ORGANIC COMPOUNDS
Parameters 08/21/14 09/25/14 10/14/14 11/18/14 12/17/14
i
Benzene 1.2 0.77 1.1 1.1 1.4 i
Chloroethane 15 9.4 15 12 15
2-Chlorotoluene 1.5 0.81 3.2 3.3 3.1
4-Chlorotoluene <1.0 <0.50 <0.50 <0.50
<0.50
1, 1-Dichloroethane 49 47 48 41 60
1, 2-Dichloroethane 0.74J 0.56 0.64 0.70 0.75
1, 1-Dichloroethene 26 28 31 23 27
cis-1,2-Dichloroethene 20 20 23 21 30
trans-1, 2-Dichloroethene 2.5 2.5 2.6 2.0 3.0
Dichlorodifluoromethane 6.1 4.0 4.8 3.2 4.4
1,4-Dioxane <80 <80 <80 <80 <80
Ethylbenzene <1.0 <0.50 <0.50 <0.50 <0.50
Methyl ethyl ketone <5.0 <5.0 <5.0 <5.0 <5.0
Methylene chloride
<2.0 <1.0 <1.0 <1.0 <1.0
Methyl Isobutyl Ketone (MIBK) <5.0 <5.0 <5.0 <5.0 <5.0
Tetrachloroethene 100 100 80 70 B, BH 72
Toluene
<1.0 <0.50 <0.50 <0.50 <0.50
1, 1, 1-Trichloroethane 1.8 1.8 2.0 1.7 2.6
Trichloroethene 7.4 5.8 6.1 4.4 6.0
Vinyl chloride 3.2 2.6 6.5 5.7 5.6
Xylenes (total) <2.0 <1.0 <1.0 <1.0 <1.0
TOTAL: 234 223 224 189 231
Comments:
RESULTS ARE PRESENTED IN UG/L.
Effective with the August 2014 sample, analytical method was changed to SW846-8260.
J: Detected but below the Reporting Limit; therefore, the result is an estimated concentration (CLP J-Flag).
B: Analyte was found in the associated blank at a concentration >1/2 RL.
BH: MB greater than one half of the RL, but the sample concentrations are greater than 10x the MB.
TABLE 1
NPDES\1,4-DIOXANERESPONSE.XLSX