NC0003875_Wasteload Allocation_19890503

NPDES DOCUHENT SCANNING COVER SLEET
NC0003875
Castle Hayne plant WWTP
NPDES Permit:
Document Type:
Permit Issuance
L.Wfsteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Staff Comments
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
May 3, 1989
Thins document is printed on reuse paper - igiore any
content on the reYerse aide

Design Capacity (MGD):
Domestic (X of Flow):
Industrial (X of Flow): /0
Comments: JO G z4-ita/ - ,443 (7(+421-,. e)
r4, .4p-ci11.3 , [km, d, Gcv/7I1-40 40
10 Iv1 4, (imiins-mac st "
'42/7,44,1z, let gobs. arkh
RECEIVING STREAM:.'+ NOr 4-el fL
Class: ""�°
Sub -Basin- Q 3 - O (c
Reference USGS Quad: _1 2156, (please attach)
County: thitio
NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NCOO 34'75
FACILITY NAME• Gi CC +;',9, 'al C4ry earfofot-i:cr
Facility Status: EXISTING ' PROPO�iD
(circle ore)
Permit Status: RENEWAL CMOOi'EC.ATION , UNPERM ED NEW
(circus one)
Major ! Minor, /. / //�1/
Pipe No ()d 3 au.` ►n¢ 'l: �.GwcU J/tte
lam' F 0 1 V
Regional Office: As Fa Mo
(circus was)
Requested By: , �1 = tiLc" , Date: 1//0/P?
Prepared By: / Date: 5/ g)
Reviewed By: Date:
Wa WS
Modeler
Date Rec.
1
f v v
4/- /'7 - e-9
.1-.7/
Drainage Area (mi2
) TIDAL Avg. Streamflow (cfs)-
7Q10 (cfs) Winter 7Q10 (cfs) 30Q2 (cfs)
Toxicity Limits: 1WC X (circle one) Acute / Chronic
Instream Monitoring:
Parameters
Upstream Location
Downstream Location
Effluent
Characteristics
Summer
Winter
BOD5 (mg/1)
NH3 N (mg/1)
D.O. (mg/I)s
TSS (mg/1)
F. Col. (/ 100m1)
pH (SU)
6- i
5e4+1Qab[ SoI1iS
0.1 MI/1
DNG + -Nu of tAA 1
,
a4 d ( A t4-1A Ne err
'i ce eglitC/1 ) - tvt
B°Ds- a� - + 41.e J
rnSi're. aM +-LArl L4-y
1,rii;+5 Lavt. bee/I eity fpe,
Se1-}lec(Ye So(,c1 an) p F( ILM;f wee to. n--uin.c,1 e� keci:oA
nd011.4on
Comments:
r
See slo'Ft te

/1
OXY
Occidental Chemical Corporation REcEtvED
CERTIFIED MAIL
p\P R 0 3 i989
ARTICLE NUMBER P-587 589 928 Wilmington neg►onal Office
RETURN RECEIPT REQUESTED
March 23, 1989
Mr. A. Preston Howard, Jr.
Regional Supervisor
N.C. DNRCD, DEM
7725 Wrightsville Avenue
Wilmington, N.C. 28403
Subject: Outfall 003 Effluent Limitations
Request for Amended Permit
NPDES Permit No, NC 0003875
Occidental Chemical Corporation
Castle Hayne Plant
Dear Mr. Howard:
�1PR it 5
Occidental Chemical Corporation operates an automobile
rinse, as an employee convenience, at it's chromium
chemicals plant in Castle Hayne. The discharge from the
automobile rinse is the Outfall 003 effluent.
The automobile rinse uses potable water, with no soaps,
detergents, or additives. The effluent flows from a catch
basin under the spray bars to a storm sewer that discharges
into a ditch, which ultimately meanders to the Northeast
Cape Fear River.
Due to an increase in the number of permanent and contract
employees, the current flow limitation of 0.003 MGD can, at
times, be restrictive. On some occasions, as many as 250
employees may work in a 24 hour period.
Occidental therefore requests an amended permit for Outfall
003 to increase the flow limitation to 0.010 MGD. Occidental
also requests that Outfall 003 BOD and turbidity monitoring
requirements be considered for elimination for the following
reasons.
There is little likelihood of exceeding any of the chemical
or physical parameters after the flow increase is approved.
Sending samples out for BOD analyses seems especially
unnecessary due to the high quality of the influent water
and its usage for automobile rinsing. In the past year, the
highest BOD was 3.0 mg/1 vs a weekly avg limit of 7.5 mg/1.
The highest monthly avg BOD was 2.0 mg/1 vs a limit of 5.0
mg / 1 .
OxyChem
Electrochemicals, Detergent & Specialty Products Group
Off State Road 1002. P.O. Box 368, Castle Hayne, North Carolina 28429 919;675-0301

A review of turbidity analyses of the river upstream and
downstream, in the past year, shows that the greatest
increase in downstream turbidity over upstream turbidity was
0.4 NTU and the highest downstream value was 5.2 NTU vs a
limit of 50.0 NTU. Since these turbidities are the only ones
performed, good quality assurrance requires a blank, three
standards, a duplicate sample, and a spiked sample, for each
pair of results. Based on the above results turbidity does
not seem warranted for this outfall.
Enclosed are three (3) copies of your application form and a
check for the $250.00 permit fee.
Please do not hesitate to call Riley West or me at (919)
675--0301 if you have any questions.
Sincerely,
(://
J.V. O'Janpa
cc: B.H. Christensen
J.L. Moon
R.F. West

RECEIVED
APR 2« 1989
Request No.: 5216
Wilmington fteUiont1 lefttla
WASTELOAD ALLOCATION APPROVAL FORM
Facility Name:
NPDES No.:
Type of Waste:
Status:
Receiving Stream:
Classification:
Subbasin:
County:
Regional Office:
Requestor:
Date of Request:
Quad:
OCCIDENTAL CHEMICAL CORPORATION 003
NC0003875
INDUSTRIAL
MODIFICATION
UT TO NORTHEAST CAPE FEAR RIVER
C-SWAMP
030623 Drainage area:
NEW HANOVER Summer 7Q10: TIDAL
WILMINGTON Winter 7Q10:
LULA HARRIS Average flow:
4/10/89 30Q2:
J27SW
RECOMMENDED EFFLUENT LIMITS
Wasteflow (mgd):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal coliform (#/100m1):
pH (su):
Toxicity Testing Req.:
Upstream (Y/N): N
Downstream (Y/N): N
0.01
MONITORING
Location:
Location:
COMMENTS
sq mi
cfs
cfs
cfs
cfs
i
RECEIVED
APR 2 7 1989
PERMITS & ENGINELRINO
1
DUE TO THE QUALITY AND NATURE OF THE EFFLUENT, RECOMMEND DELETING THE
BOD5 AND THE SETTLEABLE SOLIDS LIMITS, AND THE INSTREAM TURBIDITY.
RECOMMEND QUARTERLY EFFLUENT MONITORING OF BOD5, TURBIDITY, SETTLEABLE
SOLIDS, AND MBAS.
THESE CHANGES APPLY TO PIPE 003 ONLY (AUTOMOBILE RINSE DISCHARGE).
Recommended by:
Reviewed by
T ec-upport Supervisor:
Regional Supervisor:
Permits & Engineering:
RETURN TO TECHNICAL SERVICES BY:
MAY 19 1989
Date:
Date:
Date:
Date: