NC0083658_Wasteload Allocation_19931006

tJo„J
Ylo,,,-i.
Ids �
AAF I Mc.C��.a�, LNG.
NPDES WASTE LOAD ALLOCATION
PERMIT NO.: ENC0083658 ,F,
PERMITTEE NAME: Lennox International, Inc.
FACILITY NAME: , Heatcraft Facility
Facility Status: Proposed
Permit Status: New
Major
Pipe No.: 001
Minor -1
Design Capacity: 0.288 MGD
Domestic (% of Flow):
Industrial (% of Flow):
100 %
Comments:
this facility will be treating vicious halo ganated solvents
RECEIVING STREAM: an unnamed tributary to Bamards Creek
Class: U-Swamp
Sub -Basin: 03-06-17
Reference USGS Quad: K27NW (please attach)
County: New Hanover
Regional Office:_ _ Wilmington Regional Office
Previous Exp. Date: 00/00/00 Treatment Plant Class:
Classification changes within three miles:
PLOTTtu
Requested by: Charles Alvarez Dole: 8/9/93
Prepared by: G Date: f 3
Reviewed by: Date: 0 4 Q-3
�os�u /0
Modeler
Date Rec.
I #
1N-r,
1 ?19193
1 76-LA
Drainage Area (mix ) d. I Avg. Stream -flow (cfs): p
7Q10 (cfs) O Winter 7Q10 (cfs) 0 30Q2 (cfs) (j
Toxicity Limits: IWC 0 % Acu Chro -
InstreamMonitoring: 6?cL F-IF
Parameters N /
Upstream Location
Downstream Location
Effluent
Characteristics
MSuffiffi
VC— .
w4ntef ,
IIAIL>Y MAX
BOD5 (mg/1)
NH3-N (mg/1)
D.O. (mg/1)
TSS (mg/1)
F. Col. V100 ml)
pH (SU)
6 —
Tr�loroe��'�j
�I
�A
f fird bz-4
Iw-vpwl a
em
pl?Gt&? c
Permit must contain flow monitoring requitement such that all volumes of wastewater leaving
the facility are monitored. Recommend continuous flow monitoring. Chemical monitoring
should coincide with all whole- effluent toxicity monitoring.
A reopener clause should be placed in the permit to allow for. additional limits on these or other
toxicants should the whole -effluent toxicity testing results indicate toxic effects.

re t�,
bl
t
h
14a,000
June 9, 1993
Ms. Colleen Sullins
Page 4
TABLE 1
Highest Detected Concentration for Monitoring Well MW-4 and Production
Well PW-2, by Parameter
Detected VOCs MW-4
PW-2
Trichloroethene (TCE)
240,000 ppb (2/11/91)
2,800 ppb (1/30/93)
1,1,1-Trichloroethane (TCA)
200,000 ppb (2/11/91)
14,000 ppb (1/30/93)
1,1-Dichloroethane (DCA)
6,800 ppb (8/15/89)
29,000 ppb (1/30/93)
trans 1,2-Dichloroethane
26,000 ppb (11/15/89)
N.D.
trans 1,2-Dichloroethene .
N.D.
19,000 ppb (1/30/93)
s `, iecvcxc :.mar, Lo�=.d :.is

June 8, 1993
Ms. Colleen Sullins
Page 6
Preliminary Design of Air Stripping Unit and Speculative Waste Load
The air stripper will be designed to strip volatile organic compounds (VOCs) from the
groundwater via a forced air stream. Air stripping is an effective means for removing VOCs
from groundwater, and is composed of a liquid -gas transfer process by which VOCs diffuse
from the liquid phase (groundwater) to the gaseous phase (forced air). It is proposed that
a packed column be used to increase the liquid -gas contact in order to increase removal
efficiency. A cylindrical column will be loaded with packing material (i.e., plastic balls or
rings), designed to provide a turbulent mixing surface area for liquid -gas contact. Air will be
forced upward through the column using a blower, while water is sprayed downward,
countercurrent to the air stream.
Preliminary design calculations have been made for an air stripper followed by liquid phase
carbon polishing units to remove TCE with a removal efficiency of 99.9+ percent at a rate
of 200 gallons per minute from on -site recovery wells, as follows. TCE was selected as the
major contaminant of concern for design purposes because it has the lowest vapor pressure
at ambient air temperature, and has had significant concentrations detected in the
groundwater.
• 200 gallons per minute;
• 6,400 cubic feet per minute air flow;
• 4-foot diameter column
• 18-foot height of packing material with fiberglass support plates;
• Total column height of 20 to 24 feet;
• Jaeger Tri-Packs (packing material 3.5 inches nominal diameter); and
• Two liquid phase carbon polishing vessels in series.
Given the preliminary design specifications, it is anticipated that the maximum initial
contaminant load to the receiving waters after treatment will be 10 pg/Y of TCE and its
associated breakdown products. This level is expected to drop to lower concentration levels
as remediation proceeds.
The receiving waters are proposed to be an unnamed stream which discharges into
Barnards Creek, and ultimately to the Cape Fear River (see Site Location Map in Attachment
C).

ll� -amp
»�.��=_� `\§®� ,�� /� � :¥/\/
1.7

7 Z --Al#y 141% ( 47%n*,-14, /Tcx'4l% t'qc/Gr71 X�
/f7rS �S �( mif'h,Pl�/A77lJY/ �'� �'f/4��F/y1G77�G� S0�✓CJ'!7.`� . � ��s
41
G/[rcG( � ��- �, r1'%,f-��.F.E, /�CL/� �%. �Gt�Cr''l/� P✓>�Gi"i<i
�k%sf ey * alil g ilGUr6
5c If
74 �t/ETfc�f .:Geld At
�PT Ile Y/i��
"mot%rr/rr✓r;�n� TCE �dtivl�(� /�.�/-��'� �f' �/;��� rl %_ .
lyh�� ,i /h�l�ra��c��c�lfr�4�iuYi Mcrl;fn\J�y Wc// `/)
�i�ylr q r /—Z-P
SINc.E �Ic PtL MTl 6t-1 .
cru/dnfc�r
714-0 ri Ale7F• - I-E Y er /WP.W 4. � i f7� ie✓ it w2 E .

Facility Name:
NPDES No.:
Type of Waste:
Facility Status:
Permit Status:
Receiving Stream:
Stream Classification:
Subbasin:
County:
Regional Office:
Requestor:
Date of Request:
Topo Quad:
FACT SHEET FOR WASTELOAD ALLOCATION
Request# 7568s'�
Lennox Internationsl, Inc./Heatcraft Facility;��
NCO083658
Industrial - 100%
Proposed
C
New
UT to Barnards Creek
C-Swamp
030617
New Hanover
Stream Characteristic: DRY DITCH
Wilmington
USGS #
Alvarez
Date:
8/9/93
Drainage Area (mi2) 0.1
K27NW
Summer 7Q10 (cfs): 0.0
Winter 7Q10 (cfs): 0.0
Average Flow (cfs): 0.0
30Q2 (cfs): 0.0 J
TWC (%): 100
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
This is a remediation of halogenated solvents (mainly trichloroethene; 1,1,1-Trichloroethane; and
1,1-Dichloroethane). Facility should look into tying into a POTW when feasible. A limit for
trichloroethene will be given, as will an acceptable pH range. A WET test should be required and
quarterly monitoring for volatiles/semi-volatiles using the EPA 624 and 625 Methods will be
given.
Special Schedule Requirements and additional comments from Reviewers:
Recommended by:
Reviewed by %} /�
Instream Assessment: J '/�+_V �2it airy Dater
Regional Supervisor: C C (/ 5Vn D777
Permits & Engineering: Date:lb3A
RETURN TO TECHNICAL SERVICES BY: OCT 0 1 1993

2
TOXICS/CONVENTIONAL PARAMETERS
Recommended Limits
Monthly Avg Daily Max. Mon. Freq.
Flow (MGD): 0.288
pH (SU): 6-9 quarterly
WET Test (Chronic P/F) @90% (Feb, May, Aug, Nov)
EPA Method 624: monitor quarterly
EPA Method 625: monitor quarterly
Trichloroethene (µg/1): 81 quarterly
MISCEU,ANEOUS INFORMATION & SPECIAL CONDITIONS
Special Instructions or Conditions
Permit must contain flow monitoring requirement such that all volumes of wastewater leaving
the facility are monitored. Recommend continuous flow monitoring. Chemical monitoring
should coincide with all whole -effluent toxicity monitoring.
A reopener clause should be placed in the permit to allow for additional limits on these or other
toxicants should the whole -effluent toxicity testing results indicate toxic effects.
Explain exact pathway of discharge ( i.e. storm sewer to tributary, etc.)
Additional Information attached? (Y or N) If yes, explain with attachments.

Facility Name `�% / %� D/� T Permit # �' d Pipe #
CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY)
The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in:
1.) The North Carolina Ceriodaphnia chronic effluent bioassay procedure (North Carolina Chronic Bioassay
Procedure - Revised *September 1989) or subsequent versions.
TheAffluent concentration at which there may be no observable inhibition of reproduction or significant mortality
is D °Io (defined as treatment two in the North Carolina procedure document). The permit holder shall perform
qu=cjry monitoring using this procedure to establish compliance with the permit condition. The first test will be
perf rmed after t ' ps from the effective date of this permit during the months of
Alfil. 14 . Effluent sampling for this testing shall be performed at the NPDES
periffied final effluent disiharge below all treatment processes.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the month in which it was performed, using the parameter code TGP3B.
Additionally, DEM Form AT 1(original) is to be sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of
Environmental Management
4401 Reedy Creek Road
Raleigh, N.C. 27607
Test data shall be complete and accurate and include all supporting chemical/physical measurements performed in
association with the toxicity tests, as well as all dose/response data. Total residual chlorine of the effluent toxicity
sample must be measured and reported if chlorine is employed for disinfection of the waste stream.
Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly monitoring will
begin immediately until such time that a single test is passed. Upon passing, this monthly test requirement will
revert to quarterly in the months specified above.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of
Environmental Management indicate potential impacts to the receiving stream, this permit may be re -opened and
modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism
survival and appropriate environmental controls, shall constitute an invalid test and will require immediate
retesting(within 30 days of initial monitoring event). Failure to submit suitable test results will constitute
noncompliance with monitoring requirements.
7Q10 Z�• 0 cfs
Permitted Flow o• Lg MGD
IWC l0 4r %
Basin & Sub -basin D G�/7
Receiving Str inn O 4
County ,�i <
QCL P/F Version 9191