NC0003875_Permit (Issuance)_20121116

NPDES DOCUMENT SCANNING COVER SHEET
NC0003875
Elementis Chromium WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload 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:
November 16, 2012
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ATA
ArDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Charles Wakild, P. E. Dee Freeman
Govemor Director Secretary
November 16, 2012
Mr. Calvin Overcash
Regulatory Manager
Elementis Chromium, Inc.
5408 Holly Shelter Road
Castle Hayne, North Carolina 28429
Subject: Issuance of NPDES Permit
NC0003875
Elementis Chromium
Castle Hayne Plant
New Hanover County
Facility Class I
Dear Mr. Overcash:
Division personnel have reviewed and approved your application for renewal of the subject
permit. Accordingly, we are forwarding the attached NPDES discharge permit. This permit is issued
pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum of
Agreement between North Carolina and the U.S. Environmental Protection Agency dated October 15,
2007 (or as subsequently amended).
The following changes have been incorporated into this permit renewal:
• The limits for TSS, Hexavalent Chromium, Total Chromium and Total Nickel were
adjusted based on the most recent production data.
• Monitoring for Total Chromium, Hexavalent Chromium, and Total Nickel were
reduced to monthly based on the review of the effluent data.
• A Mercury TMDL Reopener was added to the permit (Please refer to A. (4.)).
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30)
days following receipt of this letter. This request must be in the form of a written petition, conforming to
Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative
Hearings (6714 Mail Service Center, Raleigh, North Carolina 27699-6714). Unless such demand is made,
this decision shall be final and binding.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone]
Internet: www.ncwaterouality.orq
An Equal Opportunity l Affirmative Action Employer
NO7thCarolina
X'aturail

Please note that this permit is not transferable except after notice to the Division. The Division
may require modification or revocation and reissuance of the permit. This permit does not affect the legal
requirements to obtain other permits which may be required by the Division of Water Quality or permits
required by the Division of Land Resources, the Coastal Area Management Act or any other Federal or
Local governmental permit that may be required. If you have any questions concerning this permit,
please contact Sergei Chernikov at telephone number [phone].
Sincerely,
Charles Wakild P.E.
cc: Central Files
NPDES Files
Wilmington Regional Office / Surface Water Protection Section
Aquatic Toxicology Unit (e-copy)

Permit NC0003875
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended,
Elementis Chromium, LP
is hereby authorized to discharge wastewater from a facility located at the
Castle Hayne Plant
5408 Holly Shelter Road (NCSR 1002)
Northeast of Castle Hayne
New Hanover County
to receiving waters designated as the Northeast Cape Fear River in the Cape Fear
River Basin
in accordance with effluent limitations, monitoring requirements, and other
conditions set forth in Parts I, II, III and IV hereof.
This permit shall become effective February 1, 2013.
This permit and authorization to discharge shall expire at midnight on January 31, 2018.
Signed this day November 16, 2012.
Giarles Wakild P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0003875
1
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether foroperation or
discharge are hereby revoked. As of this permit issuance, any previously issued
permit bearing this number is no longer effective. Therefore, the exclusive authority
to operate and discharge from this facility arises under the permit conditions,
requirements, terms, and provisions included herein.
Elementis Chromium LP is hereby authorized to:
1. Continue to operate the existing process wastewater treatment facility
consisting of a storage tank, six (6) batch reactors, recirculation/equalization
tank, a series of three (3) hydrocyclones followed by a series of three (3)
polymer feed systems/thickeners and clarifiers, pressure sand filters and
optional sulfur dioxide feed with discharge through outfall 001, and,
2. Continue to operate the domestic wastewater treatment facility consisting of
dual train extended aeration package plants with effluent disinfection by
tablet chlorination with discharge through outfall 002, and,
3. Discharge the flow from outfalls 001 and 002 from said treatment works at
the location specified on the attached map into the Northeast Cape Fear River,
classified B, Swamp, Primary Nursery Area, High Quality Water in the Cape
Fear River Basin.

NC0003875 - Elementis Chromium
Latitude:
Longitude:
USGS Quad:
Stream Class:
Receiving Stream:
34°22'34" Sub -Basin:
77°51'55" HUC:
Mooretown, N.C. AU:
B-Swamp, PNA, HQW
Northeast Cape Fear River
03-06-23
03030007
18-74-(47.5)
Facility
Location
New Hanover County
Map not to scale

Permit NC0003875
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [001]
During the period beginning on the effective date of this permit and lasting until expiration, the Permittee is
authorized to discharge treated industrial wastewater from outfall 001. Such discharges shall be limited and
monitored by the Permittee as specified below:
PARAMETER
LIMITS
MONITORING.REQUIREMENTS .
Monthly Average
Daily. Maximum
Measurement_
Frequency.
Sample Type
Sample
Location
Flow
0.785 MGD
Continuous
RecordingInfluent
or
Effluent
BOD, 5-day (20°C)
Weekly
Composite
Effluent
Total Suspended Solids
(TSS)
105.6 pounds/day
211.2 poundslday
Weekly
Composite
Effluent
Hexavalent Chromiuml
0.24 pounds/day
0.432 pounds/day
Monthly
Composite
Effluent
Total Chromium
2.112 pounds/day
4.224 pounds/day
Monthly
Composite
Effluent
Total Nickel
1.632 pounds/day
3.264 pounds/day
Monthly
Composite
Effluent
Temperature (°C)
Weekly
Grab
Effluent
Total Mercury 2
Quarterly
Grab
Effluent
Total Nitrogen
(NO2 + NO3 + TKN)
Quarterly
Composite
Effluent
Total Phosphorus
Quarterly
Composite
Effluent
Chronic Toxicity 3
Quarterly
Composite
Effluent
Total Copper
Quarterly
Composite
Effluent
Total Zinc
Quarterly
Composite
Effluent
Total Selenium
Quarterly
Composite
Effluent
Total Silver
Quarterly
Composite
Effluent
Chloride
Weekly
Composite
Effluent
pH
> 6.0 and <9.0 standard units
Weekly
Grab
Effluent
ivotes:
1. A composite sample may be used if the sample is analyzed within 24 hours of the first sample
portion collected.
2. Testing for mercury shall be by EPA low level method 1631E, using clean sampling technique.
3. Whole Effluent Toxicity (WET) shall be measured by chronic toxicity (Ceriodaphnia dubia)
Pass/Fail testing at 4.6%. Tests shall be conducted in February, May, August, and November
[see A. (4.) for details]. Toxicity testing shall be done in conjunction with quarterly metals testing.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN
TRACE AMOUNTS.
A. (2) MERCURY TMDL REOPENER
The Division may, upon written notification to the permittee, re -open this permit in order to
incorporate or modify effluent limitations and monitoring and reporting requirements when such
action is necessary to implement a TMDL for mercury approved by the U.S. EPA.

Permit NC0003875
A. (3) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [002]
During the period beginning on the effective date of this permit and lasting until expiration, the Permittee is
authorized to discharge treated domestic wastewater from internal outfall 002. Such discharges shall be limited
and monitored by the Permittee as specified below:
PARAMETER
• .LIMITS
MONITORING+REQUIREMENTS.
Monthly Average
Daily
Maximum
Measurement ,
Frequency:•
Sample Type
_Sample Locationl
Flow
0.020 MGD •
Weekly
Instantaneous
Influent or Effluent
BOD, 5-day (20°C)
30.0 mg/L
45.0 mg/L
Weekly
Grab
Effluent
Total Suspended Solids (TSS)
30.0 mg/L
45.0 mg/L
Weekly .
Grab
Effluent
Ammonia Nitrogen
2/Month
Grab
Effluent
Dissolved Oxygen
Daily average > 5.0 mg/L
Weekly
Grab
Effluent
Dissolved Oxygen _
Weekly
Grab
U & D
Fecal Coliform (geometric mean)
200/100 mL
400/ 100 mL
Weekly
Grab
Effluent
Total Residual Chlorine (TRC) 2
28 Ng/L
2/Week
Grab
Effluent
Temperature (°C)
Daily
Grab
Effluent, U & D
Conductivity
Weekly
Grab
U & D
Salinity
Weekly
Grab
U & D
pH
> 6.0 and < 9.0 standard units
Weekly
Grab
Effluent
Notes:
1. U: upstream of the outfall (at least 100 yards) at the nearest accessible point. D: downstream
at Hwy 117 bridge at Castle Hayne. Instream monitoring is waived by Memorandum of
Agreement between the permittee and the Lower Cape Fear River Monitoring Program. Should
the permittee's membership in this coalition terminate at any time, the permittee shall notify the
Division immediately in writing and immediately resume instream monitoring as set in this
permit.
2. TRC limit and monitoring requirements apply only if chlorine or chlorine derivatives are used
for disinfection. The facility shall report all effluent TRC values reported by a NC certified
laboratory, including field certified. However, effluent values below 50 ug/ L will be treated as
zero for compliance purposes.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN
TRACE AMOUNTS.

Permit NC0003875
A. '(4) CHRONIC TOXICITY PASS/FAIL LIMIT (QUARTERLY)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 4.6%.
The permit holder shall perform at a minimum, quarterlU monitoring using test procedures outlined in the
"North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent
versions or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or
subsequent versions. The tests will be performed during the months of February,. May, August and November.
Effluent sampling for this testing shall be performed at the NPDES permitted final effluent discharge below all
treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit
limit, then multiple -concentration testing shall be performed at a minimum, in each of the two following months
as described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February
1998) or subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the highest
concentration having no detectable impairment of reproduction or survival and the lowest concentration that
does have a detectable impairment of reproduction or survival. The definition of "detectable impairment,"
collection methods, exposure regimes, and further statistical methods are specified in the "North Carolina Phase
II 'Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for the
pass/fail results and THP3B for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to the
following address:
Attention: North Carolina Division of Water Quality
Environmental Sciences Section
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Section no later than 30
days after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate
signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is
employed for disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required,
the Permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the
facility name, permit number, pipe number, county, and the month/year of the report with the notation of "No
Flow" in the comment area of the form. The report shall be submitted to the Environmental Sciences Branch at
the address cited above.
Should the Permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be
required during the following month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of
Water Quality 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, minimum control organism reproduction, and appropriate environmental controls, shall constitute an
invalid test and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring.

s
AFFIDAVIT OF PUBLICATION
STATE OF NORTH CAROLINA
COUNTY OF NEW HANOVER
PUBLIC NOTICE
STATE OF NORTH CAROUNA
ENVIRONMENTAL. MANAGEMENT
COMMISSION/NPDES UNIT
1617 MAIL SERVICE CENTER,
RALEIGH, NC 27699-1617
NOTIFICATION OF INTENT TO ISSUE
A NPDES WASTEWATER PERMIT
The North Carolina Environmental
Management Commission proposes
to issue a NPDES wastewater dis-
charge permit to the person(s)
listed below.
Elementis Chromium requested re-
newal of permit' NC0003875 for
Castle Hayne Plant in New Hanover
County. This facility discharge is
treated industrial and domestic
wastewater to the NE Cape Fear
river in the Cape Fear River Basin.
Written comments regarding t
proposed permit will be accept
until 30 days after the publish da
of this notice. The Director of the
NC Division of Water Quality (DWQ)
may hold a public hearing should+
there be a significant degree of
public interest. Please mail com-
ments and/or information requests
to DWQ at the above address. Irn-'H
terested persons may visit the DWQ
at 512 N. Salisbury Street, Raleigh,
L NC to review information on file.
Additional information on NPDES
permits and this notice may be
found on our website:1
http:7lportal.ncden r. eralweb/waiswplpslnedeslcal
endar, or by calling [phone].
Before the undersigned, a Notary Public of Said County and State,
Keith Raffone
Who, being duly sworn or affirmed, according to the law, says that he/she is
Controller
of THE STAR -NEWS, a corporation organized and doing business under the Laws of the State of
North Carolina, and publishing a newspaper known as STAR -NEWS in the City of Wilmington
PUBLIC NOTICE STATE OF NORTH CAROLINA ENVIRONMENTAL MANAGEMENT
COMMISSION/NPDES UNIT 1617 MAIL SERVICE CENTER, RALEIGH, NC 27699-1617
NOTIFICATION OF INTENT TO ISSUE A NPDES WASTEWATER -PERMIT The North
Carolina Environmental Management Commission propose
was inserted in the aforesaid newspaper in space, and on dates as follows:
9/291x
And at the time of such publication Star -News was a newspaper meeting all thvoquirewnts and
qualifications prescribed by Sec. No. 1-597 G.S. of N.C. ``¢ �E1-- O'CO',i,��
2
?j NOTAFy Ca
..�,� Title: Controller '�
Sw r or affirmed to, and subscribed before me this /Si" = lay 'PUBLIC
, A.D., 9 / 3.. .4. �-1,. 4.-
In Testimony Whereof, I have hereunto set my hand and affixed my o enlotO and
year aforesaid. ��irl`f l"I Ilt%110
My commission expires
day of , 20_
Notary Public
iLl iSSION EXPIRES 9112IlO11
Upon reading the aforegoing affidavit with the advertisement thereto annexed it is adjudged by the Court that the said
publication was duly and properly made and that the summons has been duly and legally served on the defendant(s).
This day of
MAIL TO:
Clerk of Superior Court

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0003875
Facility Information
Applicant/Facility
Name:
Elementis Chromium Corporation - Castle Hayne Plant
Applicant Address:
5408 Holly Shelter Road; Castle Hayne, North Carolina 282z
Facility Address:
5408 Holly Shelter Road; Castle Hayne, North Carolina 282'
Permitted Flow
0.785 MGD (001)
Type of Waste:
Industrial (001) and domestic (002)
Facility/Permit Status:
Class II (physical chemical) and Class II (biological)/Active;
Renewal
Primary SIC Code: 2819
County:
New Hanover County
Miscellaneous
Receiving Stream:
Northeast Cape
Fear River
Regional Office:
Wilmington
(WiRO)
Stream Classification:
B,Swamp,PNA,
HQW
State Grid / USGS
Quad:
J27NE
Mooretown, NC
303(d) Listed?
Yes - Mercury
Permit Writer:
Sergei Chernikov,
Ph.D.
Subbasin:
03-06-23
Date:
9/16/2012
HUC:
03030007
Assessment Unit:
18-74-(47.5)
Drainage Area (mi2):
1426
_
_-
...,..
` ; •_,-
00i & 002: Lat. 34° 22'
- .
',
34" N Long. 77°
Summer 7Q10 (cfs)
25
Winter 7Q10 (cfs):
90
30Q2 (cfs)
150
Average Flow (cfs):
1800
IWC (%) Outfall 001:
4.6
51' 55" W
BACKGROUND
Elementis Chromium's Castle Hayne plant is the second largest producer
of chromium based chemicals in the world; the major product at the facility is
sodium dichromate.
Process wastewater is discharged through outfall 001 and consists of
groundwater remediation water, reject residue from the pH adjustment unit,
stormwater from coal pile runoff, and recycle residue. Treated domestic
wastewater is discharged through outfall 002 to the Northeast Cape Fear River
Waste sludge is disposed of as slurry and sent to a quarry permitted
under non -discharge permit WQ0001492. The domestic sludge is land applied
under WQ000783
Instream Monitoring and Verification of Existing Conditions and DMR
Data Review:
This facility discharges to the Northeast Cape Fear River (classified B,
Sw, PNA, HQW) in subbasin 03-06-23. As a member of the Lower Cape Fear
monitoring coalition, the instream monitoring requirements have been waived.
There is no appropriate upstream monitoring station on the Northeast Cape
Fear and the instream waste concentration for this facility is very low (4.6%).
Fact Sheet.
NPI.)[ S NC0003875 Renewal
Pau 1

Therefore, it is difficult to evaluate impact of this facility on the receiving
stream.
Compliance:
The facility did not receive any notices of violation during the previous
permit term. The facility also passed all Whole Effluent Toxicity tests during the
last 5 years.
PERMITTING STRATEGY
Waste Load Allocation (WLA):
The Division prepared the last WLA in 1996. At that time, the facility had
requested a flow decrease from 1.04 MGD to 0.785 MGD. Instream monitoring
for temperature, dissolved oxygen (DO), conductivity and salinity were
recommended. Effluent limits for flow, TSS, hexavalent chromium, total
chromium, nickel and pH were recommended at outfall 001. The modeling
unit also recommended effluent monitoring of copper, chloride, total nitrogen
and total phosphorus. Outfall 002 had recommended limits on flow, BOD,
TSS, fecal coliform and pH with monitoring for total residual chlorine and
ammonia nitrogen. The previous and current effluent limits were based on
guidelines ((40 CFR 415.172 Subpart Q) and water quality standards.
Federal Effluent Guidelines:
To determine a number of the effluent limits for the process wastestream,
the federal effluent guidelines for Subpart Q (Sodium Dichromate and Sodium
Sulfate Production Subcategory) were utilized. The guideline limits for total
suspended solids (TSS), hexavalent chromium, chromium, and nickel in terms
of pounds per thousand pounds of production. The Best Practicable
Technology (BPT) limitations for dischargers in this subpart (in terms of
pounds per thousand pounds) is as follows:
Pollutant or
pollutant property
TSS
Maximum for any 1
day
(daily maximum)
0.44
Average of 30
consecutive days
(monthly average)
0.22
Hexavalent
Chromium
0.00090
0.00050
Total Chromium
0.0088
0.0044
Total Nickel
0.0068
0.0034
•H
Within the ran:e 6.0 to 9.0
The limits for this are based on the average production of 240 tons/day of
sodium dichromate. This translates to 480,000 lbs./day, which yields a
multiplication factor of 480 for the limits given in the effluent guidelines.
Permit limits result as follows:
Het Sheet.
NP1)E S NC0003875 Renewal
Paso

Parameter of
Concern
TSS
Daily maximum
(lbs./day)
211.2
Monthly average
(lbs./day)
105.6
Hexavalent
Chromium
0.432
0.24
Chromium
4.224
2.112
Nickel
3.264
1.632
Nof�e Va 1,40
Aa i Wig r
i d i s 5tj
Water Quality Based Limits: 1-4 cvtqw,
Based upon North Carolina's water quality criteria — the following table S44kI/( dvr
presents the water quality based limits determined using 7Q10 flow and Atml tr1C(€t '
permitted design flow at 001: •i� TSS ba q
I,,i jitm
pNA this
(Tss = )04)a
0914)
Parameter of
Concern
TSS
Total Chromium
Nickel
Monthly average
(lbs./day)
2821.6
7.05
12.41
In this case, the technology -based limits (effluent guidelines) prove to be
more stringent for TSS, total chromium and nickel. Those limits will be used in
the permit.
Reasonable Potential Analysis (RPA):
The Division conducted EPA -recommended analysis on effluent data
from outfall 001 to determine the reasonable potential for toxicants to be
discharged by this facility, please see attached.
SUMMARY OF PROPOSED CHANGES:
• The limits for TSS, Hexava - t Chromium, Total Chromium and
Total Nickel were adjuste. eased on the most recent production
data.
• Monitoring for Total Chromium, Hexavalent Chromium, and
Total Nickel were reduced to monthly based on the review of the
effluent data.
• A Mercury TMDL Reopener was added to the permit.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice:
September 25, 2012
Permit Scheduled to Issue: November 19, 2012
NPDES DIVISION CONTACT:
If you have questions regarding any of the above information or on the attached
permit, please contact Sergei Chernikov at [phone].
Fact Sheet
NP]:)f3S NC0003875 Renewal
Page 3

°Elements Chromium REASONABLE POTENTIAL ANALYSIS
NC0003875
Qw (MGD) = 0.79
1 Q 1 OS (cfs) = 20.61
7QIOS (cfs) = 25.00
7Q10W (cfs) = 90.00
30Q2 (cfs) = 150.00
Avg. Stream Flow, QA (cfs) = 1800.00
Receiving Stream: North East Cape Fear
WWTP/WTP Class: 11
IWC @ I Q 10S = 5.57%
IWC ® 7Q1OS = 4.64%
IWC @ 7Q10W = 1.33%
IWC @ 30Q2 = 0.80%
IWC®QA= 0.07%
Stream Class: B, Sw, PNA, HOW
Outfall 001
Qw = 0.785 MGD .
CHRONIC TEST CONCENTRATION = 4.6%
PARAMETER
TYPE
(1)
STANDARDS & CRITERIA (2)
-i
a
N
1_
z
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
NC WQS /
Chronic
Applied
Standard
�/s FAV /
Acute
n
# Det. Max Pred Allowable Cw
Cw
Cadmium
NC
2
FW(7Q10s)
15
ug/L
11
1
1.9
Acute: 269.3
__ __ _____ _ ___—
Chronic: 43.1
No value > Allowable Cw
No limit.
___ __ _____.
— _ _ — — — — - — _
Chlorides (AL)
NC
230
FW(7Q10s)
mg/L
200
200
7,472
Acute: NO WQS
Chronic: 4,957
52 value(s) > Allowable Cw
No limit. Action level standard.
Chromium
NC
50
FW(7Q10s)
1022
ug/L
200
26
141.6
Acute: 18,348.3
_ __ ______ _ __
Chronic: 1,077.6
No value > Allowable Cw
No limit.
___________ ______________
Reduce monitoring to monthly.
Copper(AL)
NC
7
FW(7Q10s)
7
ug/L
18
14
144
Acute: 131.1
_ ________ _ __
Chronic: 150.9
No value > Allowable Cw
No limit. Action level standard.
Lead
NC
25
FW(7Q10s)
33.8
ug/L
11
1
5.1
Acute: 606.8
_ _________ _ _____
Chronic: 538.8
No value > Allowable Cw
Na limit.
________
Mercury
NC
12
FW(7Q10s)
0.5
ng/L
18
7
279.0
Acute: NO WQS
_ _ _ _ _ _ _ _ _ _ _ _
Chronic: 258.E
No value > Allowable Cw
No limit based on the TIVIDL implementation strategy.
No need for WQBEL. _ _ _
All values are below TBEL of 47 ng/L.
Nickel
NC
88
FW(7Q10s)
261
ug/L
200
8
29.5
Acute: 4,685.8
_ _________ _ __
Chronic: 1,896.6
No value > Allowable Cw
Na limit.
__ _____ --- _____ _ ,
Reduce monitoring to monthly.
Selenium
NC
5
FW(7Q10s)
56
ug/L
18
1
10.3
Acute: 1,005.4
_ __ ____ _ _
Chronic: 107.8
No value > Allowable Cw
No limit.
_____________--- _________-
Remove monitoring.
Silver (AL)
NC
0.06
FW(7Q10s)
1.23
ug/L
18
1
14.350
•
Acute: 22.083
_ _ _ _ _ _ _ _ _ . _ _
Chronic: 1.293
9 value(s) > Allowable Cw
No limit. Action level standard.
_ _ _ _ _ _ _ _ _
- - — — — — -- -
Zinc(AL)
NC
50
FW(7Q10s)
67
ug/L
18
7
193.5
Acute: 1,202.9
No limit. Action level standard.
________
Page 1 of 2
3875-RPA-2012.xlsm, rpa
11/7/2012

REASONABLE POTENTIAL ANALYSIS
Cadmium
Date Data BDL=1/2DL Results
1 1 0.5 Std Dev.
2 1 1 Mean
3 < 1 0.5 C.V.
4 < 1 0.5 n
5 c 1 0.5
6 < 1 0.5 Mult Factor =
7 < 2 1 Max. Value
8 2 1 Max. Pred Cw
9 < 2 1
10 < 2 1
11 < 2 1
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
SPECIAL -
Values" WITH
"COPY"
0.2611
0.7727
0.3379
11
Chlorides (AL)
1.88
1.0 ug/L
1.9 ug/L
Date Data BDL=I/2DL Results
1 t 4569 4569 Std Dev. 1190.4260
2 4484 4484 Mean 4,106.5
3 .f 4970 4970 C.V. 0.2899
4 (, 4204 4204 n 200
5 4898 4898
6 4446 4446 Mult Factor = 1.1
7 5401 5401 Max. Value 6793.0
8 4341 4341 Max. Pred Cw 7,472.3
9 4331 4331
10 1 5432 5432
11 5264 5264
12 4336 4336
13 4140 4140
14 4993 4993
15 4837 4837
16 4635 4635
17 3692 3692
18 4837 4837
19 4394 4394
20 3682 3682
21 4536 4536
22 '1 3739 3739
23 1._'j 5040 5040
24 ,`'.I 6209 6209
25 ;'j 4598 4598
26 l 4106 4106
27 4714 4714
28 ...I 4810 4810
29 j 5236 5236
30 t ? 4178 4178
31 F'._ 4417 4417
32 3967 3967
33. 4848 4848
34 3833 3833
35 4637 4637
36 4216 4216
37 3896 3896
38 3541 3541
39 4384 4384
40 2841 2841
41 3100 3100
42 4310 4310
43 4638 4638
44 3363 3363
45 3129 3129
46 3201 3201
47 3780 3780
48 3678 3678
49 3062 3062
50 4427 4427
51 3311 3311
52 2380 2380
53 1824 1824
54 1734 1734
55 1508 1508
56 2115 2115
57 2072 2072
58 2015 2015
59 2176 2176
60 2487 2487
61 2622 2622
62 2113 2113
63 2931 2931
64 2184 2184
65 2136 2136
66 1610 1610
67 01 3237 3237
68 3600 3600
69 !'; 1947 1947
70 2068 2068
Values" Wl
"COPY"
COMMAN
- 4 -
3875-RPA-2012.xlsm, data
9/18/2012

REASONABLE POTENTIAL ANALYSIS
2550 2550
1724 1724
2507 2507
2252 2252
2486 2486
5689 5689
1900 1900
2960 2960
2350 2350
3283 3283
2336 2336
3533 3533
3196 3196
2278 2278
1904 1904
2249 2249
2367 2367
3073 3073
2284 2284
3105 3105
3278 3278
2596 2598
3900 3900
3090 3090
2517 2517
3412 3412
2642 2642
3126 3126
3072 3072
2808 2808
2686 2686
2938 2938
2730 2730
2695 2695
2341 2341
2922 2922
2444 2444
3387 3387
4378 4378
3903 3903
4016 4016
4633 4633
4074 4074
4178 4178
4443 4443
4614 4614
4011 4011
6104 6104
5641 5641
5316 5316
6261 6261
5525 5525
5274 5274
4948 4948
4417 4417
4272 4272
5072 5072
3135 3135
3852 3852
4122 4122
4291 4291
4881 4881
5226 5226
5395 5395
5274 5274
5011 5011
4643 4643
5125 5125
4838 4838
5360 5360
5350 5350
5341 5341
5756 5756
3818 3818
- 5 -
3875-RPA-2012.xlsm, data
9/18/2012

REASONABLE POTENTIAL ANALYSIS
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
i
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
4725 4725
4704 4704
5819 5819
5111 5111
4247 4247
4062 4062
5292 5292
4337 4337
5459 5459
3944 3944
3799 3799
4701 4701
5019 5019
4903 4903
4397 4397
5425 5425
5298 5298
4182 4182
3817 3817
5570 5570
4393 4393
5626 5626
4758 4758
5216 5216
4002 4002
4744 4744
5130 5130
4886 4886
5631 5631
4398 4398
4704 4704
5121 5121
5164 5164
5590 5590
4944 4944
5104 5104
4671 4671
4580 4580
4894 4894
5096 5096
4988 4988
4908 4908
6221 6221
5484 5484
5752 5752
6767 6767
6166 6166
4942 4942
4662 4662
5068 5068
3953 3953
6793 6793
5404 5404
5973 5973
4836 4836
4423 4423
-6-
3875-RPA-2012.xlsm, data
9/18/2012

REASONABLE POTENTIAL ANALYSIS
Chromium
mg/L
mglL
Date Data BDL=1/2DL Results
< 22.92 11.4583333 Std Dev.
< 26.89 13.4469697 Mean
< 28.03 14.0151515 C.V.
52.65 52.6515152 n
46.78 46.780303
< 30.49 15.2462121 Mult Factor =
< 28.41 14.2045455 Max. Value
< 29.55 14.7727273 Max. Pred Cw
< 29.92 14.9621212
< 26.7 13.3522727
< 24.81 12.405303
< 24.43 12.2159091
< 19.13 9.56439394
< 21.59 10.7954545
< 17.61 8.80681818
< 21.59 10.7954545
< 25.38 12.6893939
56.82 56.8181818
25.19 25.1893939
23.86 23.8636364
23.11 23.1060606
22.92 22.9166667
20.27 20.2651515
21.02 21.0227273
27.27 27.2727273
22.92 22.9166667
< 23.3 11.6477273
< 23.48 11.7424242
42.8 42.8030303
< 26.52 13.2575758
< 22.54 11.2689394
< 21.4 10.7007576
< 23.48 11.7424242
< 21.78 10.8901515
< 29.55 14.7727273
< 29.17 14.5833333
< 26.7 13.3522727
57.77 57.7651515
< 27.08 13.5416667
< 23.11 11.5530303
< 25.76 12.8787879
< 15.72 7.85984848
< 21.02 10.5113636
< 22.92 11.4583333
< 26.14 13.0681818
< 23.3 11.6477273
< 27.46 13.7310606
< 26.33 13.1628788
< 26.89 13.4469697
< 27.27 13.6363636
< 25.57 12.7840909
< 25.95 12.9734848
< 23.67 11.8371212
< 23.11 11.5530303
< 24.81 12.405303
25.38 25.3787879
< 19.7 9.84848485
< 16.1 8.04924242
< 18.37 9.18560606
< 18.18 9.09090909
< 19.7 9.84848485
28.98 28.9772727
< 17.8 8.90151515
< 21.97 10.9848485
< 17.42 8.71212121
33.14 33.1439394
< 7.008 3.50378788
< 19.7 9.84848485
< 18.94 9.46969697
57.58 57.5757576
SPECIAL -
Values" WITH
"COPY"
10.9183
15.7012
0.6954
200
Copper (AL)
1.23
115.2 ug/L
141.6 ug/L
Date
Data
SPECIA
Values"
"COP
BDL=1/2DL Results
44 44 Std Dev. 13.2394
13 13 Mean 15.8889
8 8 C.V. 0.8332
13 13 n 18
7 7
5 5 Mult Factor = 3.14
9 9 Max. Value 46.0
11 11 Max. Pred Cw 144.4
46 46
35 35
22 22
20 20
21 21
10 5
10 5
10 5
12 12
10 5
-7-
3875-RPA-2012.xlsm, data
9/18/2012

REASONABLE POTENTIAL ANALYSIS
71 < 19.89 9.94318182
72 < 23.3 11.6477273
73 28.41 28.4090909
74 115.2 115.151515
75 28.22 28.219697
76 27.08 27.0833333
77 25.19 25.1893939
78 19.13 19.1287879
79 21.97 21.969697
80 < 21.4 10.7007576
81 < 25.19 12.594697
82 < 21.59 10.7954545
83 < 22.35 11.1742424
84 < 25.19 12.594697
85 < 25 12.5
86 < 21.4 10.7007576
87 < 21.02 10.5113636
88 < 23.86 11.9318182
89 < 24.62 12.3106061
90 < 22.16 11.0795455
91 < 30.68 15.3409091
92 < 23.48 11.7424242
93 < 26.14 13.0681818
94 < 27.27 13.6363636
95 < 23.11 11.5530303
96 < 25.76 12.8787879
97 < 17.99 8.99621212
98 < 27.65 13.8257576
99 < 23.67 11.8371212
100 < 23.86 11.9318182
101 < 22.35 11.1742424
102 < 22.73 11.3636364
103 < 19.51 9.75378788
104 < 20.64 10.3219697
105 < 19.51 9.75378788
106 < 20.45 10.2272727
107 < 26.7 13.3522727
108 < 25.19 12.594697
109 < 25.57 12.7840909
110 < 28.03 14.0151515
111 < 25.19 12.594697
112 < 23.67 11.8371212
113 < 23.86 11.9318182
114 < 28.22 14.1098485
115 < 28.79 14.3939394
116 < 23.11 11.5530303
117 < 28.79 14.3939394
118 < 28.98 14.4886364
119 < 29.92 14.9621212
120 < 29.17 14.5833333
121 < 27.46 13.7310606
122 < 27.08 13.5416667
123 < 30.49 15.2462121
124 < 25.19 12.594697
125 < 25.38 12.6893939
126 < 26.7 13.3522727
127 < 27.84 13.9204545
128 < 31.25 15.625
129 < 28.41 14.2045455
130 < 28.98 14.4886364
131 < 31.63 15.8143939
132 < 27.84 13.9204545
133 < 32.39 16.1931818
134 < 29.73 14.8674242
135 32.2 32.1969697
136 < 33.14 16.5719697
137 < 33.33 16.6666667
138 < 31.63 15.8143939
139 < 29.73 14.8674242
140 < 29.17 14.5833333
141 < 26.33 13.1628788
142 < 26.89 13.4469697
143 < 25 12.5
144 < 28.6 14.2992424
3875-RPA-2012.xlsm, data
- 8 - 9/18/2012

REASONABLE POTENTIAL ANALYSIS
145 < 25.38 12.6893939
146 < 29.55 14.7727273
147 < 23.86 11.9318182
148 < 28.6 14.2992424
149 < 30.11 15.0568182
150 < 27.27 13.6363636
151 < 29.92 14.9621212
152 < 28.41 14.2045455
153 < 32.2 16.0984848
154 < 26.33 13.1628788
155 < 29.17 14.5833333
156 < 26.7 13.3522727
157 < 23.86 11.9318182
158 < 23.3 11.6477273
159 < 26.7 13.3522727
160 < 29.73 14.8674242
161 < 25.95 12.9734848
162 < 17.8 8.90151515
163 < 21.59 10.7954545
164 < 19.7 9.84848485
165 < 20.83 10.4166667
166 < 39.58 19.7916667
167 < 27.65 13.8257576
168 < 23.48 11.7424242
169 < 27.27 13.6363636
170 < 25.76 12.8787879
171 < 25.57 12.7840909
172 < 24.81 12.405303
173 < 24.05 12.0265152
174 < 27.65 13.8257576
175 < 21.59 10.7954545
176 < 21.21 10.6060606
177 < 19.7 9.84848485
178 < 25 12.5
179 < 22.16 11.0795455
180 < 26.7 13.3522727
181 < 26.14 13.0681818
182 < 25.95 12.9734848
183 < 25.76 12.8787879
184 < 28.41 14.2045455
185 < 26.7 13.3522727
186 < 27.27 13.6363636
187 < 24.62 12.3106061
188 < 26.14 13.0681818
189 < 20.27 10.1325758
190 < 44.51 22.2537879
191 < 28.41 14.2045455
192 50.19 50.1893939
193 < 29.73 14.8674242
194 < 32.39 16.1931818
195 < 26.52 13.2575758
196 < 23.48 11.7424242
197 < 27.65 13.8257576
198 < 30.87 15.4356061
199 < 33.14 16.5719697
200 < 23.86 11.9318182
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
- 9 -
3875-RPA-2012.xlsm, data
11/7/2012

REASONABLE POTENTIAL ANALYSIS
Lead
Date Data BDL=1/2DL Results
1 < 5 2.5 Std Dev. 0.6431
2 2 2 Mean 1.6818
3 < 5 2.5 C.V. 0.3824
4 < 5 2.5 n 11
5 < 2 1
6 < 1 0.5 Mult Factor = 2.04
ug/L 7 < 3 1.5 Max. Value 2.5 ug/L
ug/L 8 <3 1.5 Max. Pred Cw 5.1 ug/L
9 < 3 1.5
10 < 3 1.5
11 < 3 1.5
SPECIAL -
Values" WITH
"COPY"
Mercury
Date Data BDL=1/2DL Results
1 < 200 100 Std Dev. 46.5386
2 < 200 100 Mean 64.1111
3 < 200 100 C.V. 0.7259
4 < 200 100 n 18
5 < 200 100
6 < 200 100 Mult Factor = 2.79
7 < 200 100 Max. Value 100.0
8 < • 200 100 Max. Pred Cw 279.0
9 < 200 100
10 < 200 100
11 < 200 100
12 18 18
13 7.5 7.5
14 20 20
15 2 2
16 4 4
17 1.5 1.5
18 1 1
SPECIA
Values"
"COP
3875-RPA-2012.xlsm, data
- 10 - 11 /7/2012

REASONABLE POTENTIAL ANALYSIS
Nickel
Date Data BDL=1/2DL Results
1 < 22.9 11.4585 Std Dev.
2 < 26.9 13.4469697 Mean
3 < 28.0 14.0151515 C.V.
4 < 32.4 16.1931818 n
5 < 28.2 14.1098485
6 < 30.5 15.2462121 Mult Factor =
ng/L 7 < 28.4 14.2045455 Max. Value
ng/L 8 < 29.5 14.7727273 Max. Pred Cw
9 < 29.9 14.9621212
10 26.7 13.3522727
11 < 24.8 12.405303
12 < 24.4 12.2159091
13 < 19.1 9.56439394
14 < 21.6 10.7954545
15 17.6 8.80681818
16 < 21.6 10.7954545
17 < 25.4 12.6893939
18 < 24.6 12.3106061
19 25.2 25.1893939
20 23.9 23.8636364
21 23.1 23.1060606
22 22.9 22.9166667
23 20.3 20.2651515
24 21.0 21.0227273
25 27.3 27.2727273
26 22.9 22.9166667
27 < 23.3 11.6477273
28 < 23.5 11.7424242
29 < 24.1 12.0265152
30 26.5 13.2575758
31 < 22.5 11.2689394
32 < 21.4 10.7007576
33 23.5 11.7424242
34 < 21.8 10.8901515
35 < 29.5 14.7727273
36 < 29.2 14.5833333
37 < 26.7 13.3522727
38 < 26.3 13.1628788
39 < 27.1 13.5416667
40 < 23.1 11.5530303
41 < 25.8 12.8787879
42 < 15.7 7.85984848
43 < 21.0 10.5113636
44 < 22.9 11.4583333
45 < 26.1 13.0681818
46 < 23.3 11.6477273
47 < 27.5 13.7310606
48 < 26.3 13.1628788
49 < 26.9 13.4469697
50 < 27.3 13.6363636
51 < 25.6 12.7840909
52 < 25.9 12.9734848
53 < 23.7 11.8371212
54 < 23.1 11.5530303
55 < 24.8 12.405303
56 < 23.5 11.7424242
57 < 19.7 9.84848485
58 < 16.1 8.04924242
59 < 18.4 9.18560606
60 < 18.2 9.09090909
61 < 19.7 9.84848485
62 < 18.4 9.18560606
63 < 17.8 8.90151515
64 < 22.0 10.9848485
65 < 17.4 8.71212121
66 < 18.9 9.46969697
67 < 7.0 3.50378788
68 < 19.7 9.84848485
69 < 18.9 9.46969697
70 < 19.3 9.65909091
SPECIAL -
Values" WITH
"COPY"
3.0436
13.0449
0.2333
200
1.08
27.3 ug/L
29.5 ug/L
Selenium
Date Data BDL=1/2DL Results
1 <I 5 2.5 Std Dev.
2 E.a 5 5 Mean
3 p:c 1 0.5 C.V.
4 5 2.5 n
5 1 0.5
u,^
6 s 5 2.5 Mult Factor =
7 < 5 2.5 Max. Value
8 < 5 2.5 Max. Pred Cw
9 5 2.5
10 5 2.5
11 Zd 5 2.5
12 't 5 2.5
13 = 10 5
14 10 5
15 10 5
16 10 5
17 10 5
18 10 5
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33 •
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
- 13 -
3875-RPA-2012.xlsm, data
9/18/2012

REASONABLE POTENTIAL ANALYSIS
71 < 19.9 9.94318182
72 < 23,3 11.6477273
73 • 24.2 12.1212121
74 • 24.6 12.3106061
75 < 21.0 10.5113636
76 • 27.1 13.5416667
77 < 25.2 12.594697
78 < 19.1 9.56439394
79 < 22.0 10.9848485
80 < 21.4 10.7007576
81 < 25.2 12.594697
82 < 21.6 10.7954545
83 < 22.3 11.1742424
84 • 25.2 12.594697
85 • 25.0 12.5
86 • 21.4 10.7007576
87 < 21.0 10.5113636
88 < 23.9 11.9318182
89 • 24.6 12.3106061
90 < 22.2 11.0795455
91 • 30.7 15.3409091
92 • 23.5 11.7424242
93 < 26.1 13.0681818
94 < 27.3 13.8363636
95 < 23.1 11.5530303
96 < 25.8 12.8787879
97 • 18.0 8.99621212
98 • 27.7 13.8257576
99 • 23.7 11.8371212
100 • 23.9 11.9318182
101 • 22.3 11.1742424
102 • 22.7 11.3636364
103 < 19.5 9.75378788
104 < 20.6 10.3219697
105 < 19.5 9.75378788
106 • 28.0 14.0151515
107 < 25.2 12.594697
108 < 23.7 11.8371212
109 < 23.9 11.9318182
110 • 28.2 14.1098485
111 < 28.8 14.3939394
112 < 23.1 11.5530303
113 < 28.8 14.3939394
114 < 29.0 14.4886364
115 < 29.9 14.9621212
116 < 29.2 14.5833333
117 < 27.1 13.5416667
118 < 15.3 7.65
119 < 25.2 12.594697
120 • 25.4 12.6893939
121 < 26.7 13.3522727
122 < 27.8 13.9204545
123 • 31.3 15.625
124 • 28.4 14.2045455
125 • 29.0 14.4886364
126 • 31.6 15.8143939
127 < 27.8 13.9204545
128 < 32.4 16.1931818
129 • 29.7 14.8674242
130 • 30.3 15,1515152
131 • 33.1 16.5719697
132 < 33.3 16.6666667
133 < 31.6 15.8143939
134 • 29.7 14.8674242
135 • 29.2 14.5833333
136 • 26.3 13.1628788
137 • 26.9 13.4469697
138 • 25.0 12.5
139 • 28.6 14.2992424
140 • 25.4 12.6893939
141 • 29.5 14.7727273
142 • 23.9 11.9318182
143 • 28.6 14.2992424
144 < 30.1 15.0568182
-14-
3875-RPA-2012.xlsm, data
9/18/2012

REASONABLE POTENTIAL ANALYSIS
145 < 27.3 13.6363636
146 < 29.9 14.9621212
147 < 28.4 14.2045455
148 < 32.2 16.0984848
149 < 26.3 13.1628788
150 < 29.2 14.5833333
151 < 26.7 13.3522727
152 < 23.9 11.9318182
153 < 23.3 11.6477273
154 < 26.7 13.3522727
155 < 29.7 14.8674242
156 < 25.9 12.9734848
157 < 17.8 8.90151515
158 < 21.6 10.7954545
159 < 19.7 9.84848485
160 < 20.8 10.4166667
161 < 39.6 19.7916667
162 < 27.7 13.8257576
163 < 23.5 11.7424242
164 < 27.3 13.6363636
165 < 25.8 12.8787879
166 < 25.6 12.7840909
167 < 24.8 12.405303
168 < 24.1 12.0265152
169 < 27.7 13.8257576
170 < 21.6 10.7954545
171 < 21.2 10.6060606
172 < 19.7 9.84848485
173 < 25.0 12.5
174 < 22.2 11.0795455
175 < 26.7 13.3522727
176 < 26.1 13.0681818
177 < 25.9 12.9734848
178 < 25.8 12.8787879
179 < 28.4 14.2045455
180 26.7 13.3522727
181 < 27.3 13.6363636
182 < 24.6 12.3106061
183 < 25.8 12.8787879
184 < 20.3 10.1325758
185 < 44.5 22.2537879
186 < 28.4 14.2045455
187 < 31.3 15.625
188 < 29.7 14.8674242
189 < 32.4 16.1931818
190 < 26.5 13.2575758
191 < 23.5 11.7424242
192 < 27.7 13.8257576
193 < 30.9 15.4356061
194 < 33.1 16.5719697
195 < 23.9 11.9318182
196 < 24.6 12.3106061
197 < 25.9 12.9734848
198 < 27.8 13.9204545
199 < 29.2 14.5833333
200 < 29.2 14.5833333
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
3875-RPA-2012.xlsm, data
- 15 - 9/18/2012

REASONABLE POTENTIAL ANALYSIS
SPECIAL -
Values" W1TH
"COPY"
Silver (AL)
1.5648
3.2500
0.4815
18
2.05
5.0 ug/L
10.3 ug/L
Date Data BDL=1/2DL Results
< 5 2.5 Std Dev. 1.8979
1 1 Mean 2.5278
- 1 0.5 C.V. 0.7508
< 5 2.5 n 18
< 5 2.5
< 1 0.5 Mult Factor = 2.87
< 2 1 Max. Value 5.000 ug/L
< 2 1 Max. Pred Cw 14.350 ug/L
SPECIAL -
Values" KITH
"COPY„
Zinc (AL)
< 2 1
<' 2 1
<• 2 1
< 2 1
< 10 5
<: 10 5
< 10 5
<i 10 5
<; 10 5
<:• 10 5
Date Data BDL=1/2DL Results
45 45 Std Dev.
5 5 Mean
• 5 2.5 C.V.
• 5 2.5 n
• 20 10
6 6 Mult Factor =
▪ 5 2.5 Max. Value
9 9 Max. Pred Cw
7 7
12 12
• 5 2.5
▪ 5 2.5
15 15
• 20 10
• 10 5
▪ 10 5
• 10 5
• 10 5
- 16 -
3875-RPA-2012.xlsm, data
9/18/2012

FED EX Tracking Number
8744 4548 4942
July 31, 2012
NC DENR — DIVISION OF WATER QUALITY
NPDES Unit
512 North Salisbury Street
9iFloor Archdale Building
Raleigh, NC 27604
Attn: Mr. Charles Weaver
RE: NPDES PERMIT RENEWAL
NC0003875 — ELEMENTIS CHROMIUM, INC CASTLE HAYNE PLANT
Dear Mr. Weaver:
ELEMENTIS
CHROMIUM
AUG 08 2012
DENR-LVATE.F. !'
POINT SOURC7'.
Enclosed please find the original and two copies of the completed NPDES Permit Application for renewal of this
facility's NPDES permit, Permit Number NC0003875. Our current permit expires at midnight on January 31, 2013.
Elementis Chromium, Inc (Elementis) hereby respectively requests renewal of NPDES Permit Number NC0003875
for the above referenced facility.
Elementis manufactures sodium dichromate, chromic acid, sodium sulfate anhydrous, and salt cake at its Castle
Hayne facility and is subject to 40 CFR 415.
Please note that there have been no changes at the facility since issuance of the last permit. However, the facility is
in the process of replacing chlorine disinfection with ultraviolet disinfection in the sanitary waste treatment plant.
The UV system is expected to be fully operational by the end of August 2012.
Thank you for your efforts with this renewal. If you have any questions or concerns, please do not hesitate to contact
me at [phone].
Sincerely,
Calvin Overcash
Regulatory Manager
Enclosures
Elementis Chromium LP
5408 Holly Shelter Road
Castle Hayne, NC 28429
Telephone: [phone](X)
Facsimile: [phone]

NARRATIVE DESCRIPTION OF INDUSTRIAL WASTEWATER TREATMENT
Wastewater slurry from the #2 repulp tank in the neutralization production area and waste water
from the recycle production area enters the wastewater treatment process via the 80,000 gallon
wastewater collection tank. Pickle liquor (ferrous chloride reducing agent) and/or sulfur dioxide
are added to begin the reduction of hexavalent chromium to trivalent chromium.
Wastewater slurry is pumped from the waste collection tank to one of three 24,000 gallon
reactors. Pickle liquor is added to the reactor to complete the reduction of hexavalent chromium
to trivalent chromium. When the reduction is complete, lime slurry is added to the reactor to
raise the pH so that chromium, iron, and other metals will precipitate from the treated wastewater
solution.
Contaminated water wastes from groundwater recovery wells, containment areas, production
area sumps, etc. enter the wastewater treatment process via the 10,000 gallon sump surge tank.
The sump surge tank is pumped to the 12,000 gallon water batch reactor. Pickle liquor is added
to the reactor to reduce the hexavalent chromium to trivalent chromium. When the reduction is
complete, lime slurry is added to raise the pH, to precipitate metals.
All four reactors are pumped to the 103,000 gallon treatment surge tank. This tank allows a
continuous feed of the treated wastewater batches into the chloride removal
(countercurrent washing) circuit.
The treatment surge tank is pumped to the 4,700 gallon feed reslurry tank. This feed reslurry tank
is the starting point for two parallel washing circuits. One circuit washes soluble solids from light
solids. The other circuit washes soluble solids from heavy solids.
The light circuit has three 95,000 gallon clarifiers, and two 3,200 gallon light reslurry tanks.
The heavies circuit has three hydroclones, and two 1,100 gallon light reslurry tanks.
Both washing circuits wash soluble solids away from the insoluble solids. The liquid proceeds
from three to two to one and eventually becomes the effluent to the river, while the washed
residual solids go from one to two to three and eventually to a surface impoundment.
The underflow (residual solids) from the third stage of each washing circuit enters the 3,950
gallon sludge hold tank. Crushed limestone is added to the treated waste slurry in the sludge hold
tank to decrease the solubility and mobility of metals in the residual solids. The treated slurry is
then pumped to the 10,000 gallon sludge retention tank where either river water, or quarry return
water is added for transport to the surface impoundment. The residual solids are pumped via
conveyance piping to the surface impoundment. Please see the attached, signed Sludge
Management Plan for details.
The liquid overflow from the first stage clarifier goes to the 10,000 gallon overflow tank. The
overflow tank feeds one of the three, eleven foot diameter, 800 GPM capacity sand filters. The
polished water from the sand filters is the 001 effluent to the river. The maximum permitted
monthly average flow of this stream is 0.785 MGD.

NARRATIVE DESCRIPTION OF DOMESTIC WASTEWATER TREATMENT
Domestic wastewater from showers, sinks, and restrooms enters the wastewater treatment
process via the 5,000 gallon equalization tank. The equalization tank is continuously aerated.
The flow from the equalization tank is split and pumped to two parallel extended aeration
package plants; each plant has a 10,000 gpd treatment capacity.
Plant one has two 5,000 gallon aeration compartments, while plant two has one 10,000 gallon
aeration compartment, but the operation is essentially the same. The treatment units share five
blowers. One is used for the equalization tank. Two are used for the aeration compartments and
air lifts, and two are spares.
The flow precedes from the aeration compartments to the clarifiers. The overflow from the
clarifiers feed tablet chlorinators. Each plant has a chlorine contact tank sized to provide a
minimum of thirty minutes contact time at 10,000 gallons per day. The water from each of the
plants' chlorine contact chambers is the 002 effluent to the river. After the chlorine contact
chamber, dechlorination is achieved by metering liquid sodium metabisulfite into the effluent
stream. The maximum permitted monthly average flow of this stream is 0.020 MGD. The
facility is in the process of converting from chlorine disinfection to ultraviolet disinfection. The
equipment is in the process of being installed and tested and should be in operation by the end of
August 2012.
Wasted sludge is sent to a digester for further aeration. Plant one has a 1,500 gallon digester and
Plant two has a 3,000 gallon digester.
Lime is added to digested sludge for vector control and is land -farmed by Lewis Farms. Please
see the attached, signed Sludge Management Plan for details.
A 3.O liter diesel backup generator auto starts during power interruptions, supplying electricity to
operate the treatment plants, pumps, lights, etc.

STORMIAT€R r OPn
%ELL WATER 26 CPR
0
SUN.
SURGE
TAN/
I CPN
Se OPT
SALT CAKE !R311
0N
PROCESS SIAIPS
2$ O[ii
BATCH
PATER
REACTOR
12.O83 01
83 GM
PICKLE LIQUOR
REJECT RESIO(S 120 C4'e
SULFUR DIOXIDE 847 Len"
PICKLE ttLCCI01JOL - e eye v,
OA HYGRpCliL AC18 3 O+ d
RECYCLE RESIDUE tiESPe
X
169
OPI
045 EPNN
CWERFL011
uNC
24$ CJPN
POL'SHIM
•11.1111.1
Eci zTot+-= moo MOORS)�q rREA xxr 435 Y
A►K Ix24.M0 OAI. ----o Twat TAM
LINE SLURRY 7.0 OPN
IlONILSI TREATIENT
i
Tilr�TlerxT�a°s
SLIP
BOILER BLOlr00Y 4 I
Com
FILTE+'S
545 OFR
{
13e 0PM
90 Chx I . 1 43 avR I . 2
d 7NTC1�6R �� mum'�~ WOOER Law
TANK tax
4110111111111•1•MOr ww
TQ! OPN
sn TO RIPER
RIPER HATER
ND. 3
TNID:kW
RI WTI 4ATER
CYCLONE
DO.WWN
i
BESLURRY
TANG
NO. 2
MO. 2
NEAYY
TAN«
IOE REMOY
NO. 2
CPS RIVER PATER OR
QUARRY PATER
P
SLLOCiE
WIZ
TANG
30 GPN
SLLITRT
RET ION
2.0 TP14
aiuSmED
LInESMIE
310 420 CPR
01 $ARP
COMMANDS & ASZEIA1ES. IIC.
CRA GEOLOGIC SERVICES. INC.
G. LATNAN
7106
N. LIFE
0
DRAWN BY
DATE
REY. N0.
NTS
SCALE
6440.IOC 0331GN-T7013
GRAYING NO.
EiJG-eNT1l.S l�(flG� ��% r:,�BQ�
CATTI.S VATAL MO
GENERAL SCHEMATIC
OF
WASTEWATER TREATMENT
2
FIG NO.
26448-10(033)GN-TV013.dgn 7/18/2006 9:51:07 AM

J.
COESTOGAIDTERI LA/mar% EL
CRA ENGINEERING, INC.
MKL
Drawn by
•
8/5/04
Date
Outfall: 001 & 002
Latitude: 34 2234"
Longititude: 77 51' 55"
ii3-.6:.;11 ter'
Rev. No.
6448-10(026)0N-7700i
Drawing No.
•••- .31.
ELEMENTIS CHROMIUM, L.P.
CASTLE HAYNE, NORTH CAROLINA
REF. USGS 7. 5' TOPOGRAPHIC HAPSJ
CASTLE HAYNE, SCOTTS HILL,
ROCKY POI NT, AND MOORETOWN,
NORTH CAROLINA, DATED 1970.
0 feet 2000
SCALE
FACILITY LOCATION
MAP
rq
1
No.

ELEMENTIS CHROMIUM SLUDGE MANAGEMENT PLAN
Date: July 30, 2012
Prepared by Sean Coury — Elementis Chron--‘71i-2 Industrial Plant ORC
The sludge generated in Elementis Chromium's industrial wastewater treatment process is sent
as slurry to the "quarry" under Occidental Chemical Corporation's Surface Disposal of Residual
Solids Permit No. WQ0001492. Elementis Chromium holds a license agreement with
Occidental Chemical Corporation to dispose of the solids discharged to the "Quarry". Specific
regulatory requirements are stipulated in the permit. They include maintaining two feet of
freeboard, monitoring the waste using the TCLP test, and maintaining inspection logs, etc. This
activity is 503 exempt.
The sludge generated from the domestic wastewater treatment process is removed for land
application at a permitted site (WQ0000455) by Lewis Farms. Vector control is accomplished by
/"k, having Lewis Farms add lime to the truck load of sludge and follow the DENR procedure to
maintain a high pH prior to Land Application. Annual samples of the sludge are collected and
analyzed as required by Lewis Farms' Permit. Typically 4,000 to 8,000 gallons of sludge are
removed annually.
Approved by: Calvin Overcash — Regulatory Manager

Production
Kiln (tons)
Annual Tons
2009
Jan
2715.035
Feb
2643.086
Mar
3319.85
Apr
1774.464
May
4097.123
June
6185.584
July
6032.475
Aug
6305.633
Sept
6365.132
Oct
6139.854
Nov
6568.99
Dec
5200.843
57348.06974
2010
Jan
6970.447
Feb
8078.931
Mar
9472.984
Apr
8847.51
May
9208.646
Jun
8964.989
Jul
8952.549
Aug
9781.745
Sep
8684.771
Oct
8516.573
Nov
9310.036
Dec
7495.542
104284.7219
2011
Jan
8586.105
Feb
6965.127
Mar
8307.175
Apr
8916.819
May
9545.073
June
9340.813
July
10012.63
Aug
9049.018
Sept
8815.5
Oct
8309.803
Nov
7678.102
Dec
5335.851
100862.015
average daily production
239.7213
tons/day
tons/month
average monthly production
7291.522
average annual production
87498.27
tons/year
max monthly
10012.63
tons
max annual
104284.7
tons