NCS000533_Fact sheet binder_20230907

DEQ / DEMLR
FACT SHEET FOR NPDES INDUSTRIAL INDIVIDUAL
STORMWATER PERMIT DEVELOPMENT
Basic Information for Permit Issuance and Renewals:
Permit Writer/Date Brianna Young 8/28/2023
Permit Number NCS000533
Owner/Facility Name Entegris, Inc./Entegris,Inc.
SIC AICS Code/Category 2869/Chemical Manufacturing
Basin Name/Sub-basin number Cape Fear/03-06-17
Receiving Stream/HUC UT to Mill Creek/030300050303
Stream Classification/Stream Segment Q Sw/ 18-64-15
Is the stream impaired on 303 d list]? No
Any TMDLs? No
Any threatened and/or endangered species? See Section 2 below
Any compliance concerns? See Section 2 below
Any perinit mods since lastpermit? See Section 1 below
New expiration date 9/30/2028
Comments on Draft Permit? See Section 6(below)
Section 1. Facility Activities and Process:
Entegris, LLC is a facility manufacturing organosilicon compounds and fine organics using batch
processes. Silicones and adhesion promoters are produced for use in pharmaceutical, biomedical
devices, electronics, industrial, and R&D markets. Per a 2014 letter, the Wright Chemical Company site
(now Oak Bark Corp) listed on 2011 EPA National Priorities list for discovery of former lead chamber
acid plant. Per a 4/20/2015 DEQ email, this facility is the Wright Chemical/Oak Bark/flexion/Sitar site
involved in Superfund cleanup. The site now has three separate stormwater permits: NCS000156
(Bakelite, LLC; active; original permit assigned to Wright Chemical Corporation),NCS000532 (Oak
Bark Corp.; inactive), and NCS000533 (Entegris, Inc.; active).
Per the 2010 fact sheet: This site is part of a larger site which was owned by Wright Corporation. In
December 2006 a major portion was sold to Hexion Specialty Chemical. The sale transferred part of the
facility to Hexion and the remaining part became Oak Bark Corporation (which included Silar). In
November 2008, Hexion applied for a separate permit which left out 4 existing outfalls (SW001,
SW002, SW005, and SW007). On April 22, 2009 OBC sold Silar to Monomer Polymers which has
outfalls SW001, SW002, and SW005. Hexion's stormwater outfalls are 003, 004, 006, 008, and 009
(from 2008 application), Oak Bark Corp. drains to 007, and Silar drains to 001, 002, and 005. Three
permits were issued for Hexion, Oak Bark, and Silar.
Per the March 2011 EPA NPL listing, contaminates onsite include low pH, arsenic, lead, mercury, and
the pesticides dieldrin and gamma-chlordane.
Per information provided by the permittee in an email dated 8/1/2022, changes to the facility since the
last permit renewal include replacement of two (2) 5,600-gallon wastewater tanks with two (2) 8,500-
gallon wastewater tanks, removal of the 3,800-gallon wastewater tank, and a couple of reactors removed
from service.
Page 1 of 9

Outfall SW001:
Drainage area includes drum warehouse chemical storage area, maintenance shop area, and a lined
monofil pond from adjacent manufacturer Oak-Bark Corp.
Outfall SW002:
Drainage area includes the Low Volume Manufacturing Area, chemical storage area, and runoff from
adjacent manufacturer Bakelite and their methanol tanks and formaldehyde operation.
Outfall SW005:
Drainage area includes hazardous waste tank storage tanks, High Volume Manufacturing Area, chemical
staging areas, a filtration area, and methanol unloading and formaldehyde production from adjacent
manufacturer Bakelite.
Outfall SWO10:
Drainage area includes potential runoff from chemical storage areas, Low Volume Production Area, and
a building containing distillation unit that processes non-hazardous material.
Why Industrial Sites with Stormwater are Subject to a Permit: Federal NPDES regulations define
stormwater discharge associated with industrial activity in 40 CFR §122.26 (b)(14) as: "the discharge
from any conveyance that is used for collecting and conveying storm water and that is directly related to
manufacturing,processing or raw materials storage areas at an industrial plant. The term does not
include discharges from facilities or activities excluded from the NPDES program under this part 122.
For the categories of industries identified in this section, the term includes, but is not limited to, storm
water [sic] discharges from industrial plant yards; immediate access roads and rail lines used or traveled
by carriers of raw materials, manufactured products, waste material, or byproducts used or created by
the facility; material handling sites; refuse sites; sites used for the application or disposal of process
waste waters (as defined at part 401 of this chapter); sites used for the storage and maintenance of
material handling equipment; sites used for residual treatment, storage, or disposal; shipping and
receiving areas; manufacturing buildings; storage areas (including tank farms) for raw materials, and
intermediate and final products; and areas where industrial activity has taken place in the past and
significant materials remain and are exposed to storm water. For the purposes of this paragraph, material
handling activities include storage, loading and unloading, transportation, or conveyance of any raw
material, intermediate product, final product, byproduct or waste product. The term excludes areas
located on plant lands separate from the plant's industrial activities, such as office buildings and
accompanying parking lots as long as the drainage from the excluded areas is not mixed with storm
water [sic] drained from the above described areas."
Section 2. Monitoring Information and Compliance History:
• January 2011 to July 2012 and January 2013 to December 2013, benchmarks exceeded for:
0 001: BOD 2x, TSS 2x, COD lx, TKN 5x,NO2+NO3 4x, Ammonia Nitrogen 5x, TP lx,
Formaldehyde 2x, Copper 7x, Zinc 4x
0 002: BOD 4x, COD 4x, TSS 2x, TKN 4x, Ammonia Nitrogen 2x, Formaldehyde 18x,
Copper 20x, Zinc 17x
0 005: BOD 8x, COD 3x, TSS 2x, TKN 2x, Ammonia Nitrogen Ix, Formaldehyde 14x,
Copper 19x, Zinc 20x, pH Ix
0 010: BOD 4x, COD 3x, Ammonia Nitrogen lx, Formaldehyde 3x, Copper 5x, Zinc 5x
Page 2 of 9

• February 2014 to May 2022, benchmarks exceeded for:
0 001: TSS Ix, COD Ix, TRC 4x, Formaldehyde 7x, Copper 4x, Zinc Ix, pH Ix
0 002: TSS Ix, BOD 2x, COD 1 Ix,NH3 4x, TKN 4x, TP 2x, TRC 3x, Formaldehyde 25x,
Copper 35x, Zinc 28x, pH 2x
0 004: BOD 6x, COD 12x,NH3 12x, TKN 6x,NO3+NO2 Ix, TRC 3x, Formaldehyde 24x,
Copper 26x, Zinc 14x, pH I
0 005: TSS Ix, BOD 3x, COD 12x,NH3 2x, TKN 2x, TP Ix, TRC 4x, Formaldehyde 24x,
Copper 38x, Zinc 37x, pH 4x, DO 3x, acute toxicity 2x
0 010: BOD 7x, COD 6x,NH3 3x, TKN 4x, TP Ix, TRC 7x, Formaldehyde 19x, Copper
30x, Zinc 27x, lead Ix, pH 3x, acute toxicity 2x
• Aquatic toxicity testing not performed in 2016, 2019, 2021, and 2022
• Per letter dated 1/19/2012, SW003 was in Tier III status for TKN, ammonia nitrogen, copper,
and zinc
• Per letter dated 1/19/2012, SW004 was in Tier III status for BOD, COD, TKN, ammonia
nitrogen, formaldehyde, copper, and zinc
• Per letter dated 1/19/2012, SW006 was in Tier III status for formaldehyde
• Per letter dated 1/19/2012, SW009 was in Tier III status for copper and zinc
• The facility was in Tier II status for multiple outfalls throughout the previous permit period
Per the January 2012 DEMLR inspection report, Tier II and Tier III requirements were triggered at
outfalls (001, 002, 005). Silar was found to not be compliant with the monthly monitoring requirement
but requested relief from monthly monitoring due to runoff from Oakbark and Momentive (Silar
believed stormwater from the Momentive and Oakbark facilities were contributory). A review of the raw
materials/products used/produced by Silar did not include formaldehyde or hexamine, but unclear if any
compounds utilized by Silar could dissociate/decompose to form hexamine or formaldehyde.
Per the February 2021 DEMLR inspection report, the facility was in monthly sampling and should be
considered in Tier III. Inspection report stated greater effort to collect samples needs to be applied,
tiered response should be documented in the SPPP, and the facility needs to follow tier requirements and
document responses to sampling events, including evaluation of potential pollutants and selection of
BMPs to reduce sample results. Inspection report also noted sampling for manganese and acute toxicity
had not been done.
Per the July 2022 DEMLR inspection report, the analytical sampling has resulted in Tier III for most if
not all parameters at outfalls SW002, SW005, and SWO10. The facility is using waddles to capture
heavy metals and Outfall 005 is being affected by the adjacent permit(Bakelite). There is a speed bump
that is supposed to keep the drainage separate but is ineffective during a solid rain event. Entegris stated
they want to remove the sampling point as they claim their process does not contribute to the outfall (i.e.
they do not use formaldehyde).
Threatened/Endangered Species:
The Coppery Emerald(Somatochlora georgiana;NC status: SR) is in the vicinity of discharge.
Additional species nearby include: Bigleaf Grass-of-Parnassus (Parnassia grandifolia; NC status: T),
Social Sedge (Carex socialis; NC status: SR-P), Spring-flowering Goldenrod(Solidago verna;NC
status: T), Eastern Diamondback Rattlesnake (Crotalus adamanteus; NC status: E), Dissected
Sneezeweed(Helenium pinnatifidum;NC status: SR-P), Savanna Indigo-bush (Amorpha confuse;NC
status: T), Hooker's Milkwort (Polygala hookeri; NC status: SC-V), Rough-leaf Loosestrife (Lysimachia
asperulifolia;NC status: E; Federal status: E), Venus Flytrap (Dionaea muscipula;NC status: T), and
Northern Pinesnake (Pituophis melanoleucus melanoleucus;NC status: T).
Page 3 of 9

Section 3. Proposed Monitoring for Stormwater Discharges:
The Division considered potential pollutants from past and present industrial activities and data was
submitted for January 2011 to June 2022. Quantitative sampling included TSS,pH, O&G, BOD, COD,
TRC, dissolved oxygen,NH3, TKN,NO3+NO2, total phosphorus, methanol, hexamine, formaldehyde,
copper, zinc, manganese, lead, and acute toxicity.
Parameters are based on potential pollutants in the drainage area, sampling results, and in some cases,
dependent upon future activities (e.g., ash removal through the drainage area). Below is a table of the
proposed monitoring for each outfall at the Entegris, Inc. site.
Outfalls SW001, SW002, SW005, SWO10
Quarterly monitoring
Total Suspended Solids BASIS: Potential pollutant from drainage area and BMP effectiveness
(TSS) indicator.
Quarterly monitoring
H BASIS: Pollutant indicator and important to interpreting toxicity potential
p of metals.
Quarterly monitoring
Total Rainfall BASIS: Discharge potential indicator
Quarterly monitoring
Non-Polar Oil &Grease BASIS: Potential pollutant from lubricants; Method 1664 SGT-HEM
targets petroleum-based O&G
Quarterly monitoring
Monthly Oil Usage BASIS: Potential pollutant from drainage area
Quarterly monitoring
BOD BASIS: Discharge potential indicator; appropriate for the various organic
chemicals stored and used at the facility.
Quarterly monitoring
COD BASIS: Discharge potential indicator; appropriate for the various organic
chemicals stored and used at the facility.
Quarterly monitoring
Ammonia Nitrogen BASIS: Potential pollutant from drainage area
Quarterly monitoring
Total Nitrogen BASIS: Potential pollutant from drainage area
Quarterly monitoring
BASIS: Discharge potential indicator
Total Phosphorus
Per 2010 draft permit addendum: TP added for consistency with Oak Bark
and Hexion draft permits; monitoring may be discontinued if the first 8
Page 4 of 9

samples are below benchmark values as industrial activities may not be
sources
4After reviewing the monitoring data submitted with the current
renewal, there were 4 exceedances of TP from February 2014 to May
2022
Total Residual Chlorine Quarterly monitoring
(TRC) BASIS: Potential pollutant from drainage area
Quarterly monitoring
Hexamine BASIS: Potential pollutant from drainage area
Quarterly monitoring
Formaldehyde BASIS: Potential pollutant from drainage area
Quarterly monitoring
Methanol BASIS: Potential pollutant from drainage area
Quarterly monitoring
Total Copper BASIS: Potential pollutant from drainage area
Quarterly monitoring
BASIS: Potential pollutant from drainage area
Per 2010 draft permit addendum: Lead added for consistency with Oak
Bark and Hexion draft permits; monitoring may be discontinued if the
Total Lead first 8 samples are below benchmark values as industrial activities may
not be sources
4After reviewing the monitoring data submitted with the current
renewal, there was 1 exceedance of total lead from February 2014 to May
2022
Quarterly monitoring
Total Zinc BASIS: Potential pollutant from drainage area
Quarterly monitoring
Total Hardness BASIS: Monitoring for hardness dependent metals required
Quarterly monitoring
Acute Toxicity BASIS: Toxicity indicator; multiple toxic sources onsite and unknown
chemical mixing resulting in unknown environmental toxicity
Stormwater Benchmarks and Tiered Response: Rather than limits,North Carolina NPDES
Stormwater permits contain benchmark concentrations. Stormwater benchmarks are numerical action
levels for stormwater monitoring. Benchmarks are not effluent limits, and benchmark exceedances are
not permit violations. Benchmarks provide facilities a tool for assessing the significance of pollutants in
stormwater discharges and the effectiveness of best management practices (BMPs). Benchmark
Page 5 of 9

concentrations are intended as guidelines for the facility's development and implementation of the
Stormwater Pollution Prevention Plan(SWPPP).
Benchmark exceedances require the permittee to increase monitoring, increase management actions,
increase record keeping, and/or install stormwater BMPs in a tiered program. The permit establishes a
tiered approach to specify actions the permittee must take in response to analytical results above
benchmark concentrations. The tiered structure of the permit provides the permittee and DEMLR wide
flexibility to address issues that may arise with one or more parameters and/or outfalls.
Metals benchmarks are calculated to mimic acute water quality standards and with the guidance of
DWR. NC DWR follows established federal procedures for calculating acute standards when developing
the benchmarks. Just like the acute standards, metals benchmarks normally reflect one half of the
calculated Final Acute Value (the "1/2 FAV"). In most cases, translation into total recoverable values is
based on an assumed hardness of 25 mg/L and a total suspended solids (TSS) concentration of 10 mg/L.
Acute standards protect aquatic life from negative impacts of short-term exposure to higher levels of
chemicals where the discharge enters a waterbody. The Stormwater Permitting Program applies this
approach because of the ephemeral nature of rainfall events.
The Division may evaluate results to determine if a smaller suite of parameters for some outfalls is
adequate to characterize potential pollution or BMP effectiveness. For example, one or more metals or
other parameters may serve as an adequate tracer for the presence of ash pollution during disturbance or
ash removal in specific drainage areas at this site. For parameters that do not have a stormwater
benchmark, the Division may develop a benchmark value if appropriate toxicity data become available
or if rising trends in concentrations suggest a persistent source.
A summary of the benchmarks in the draft permit, and their basis, is below:
Parameter Benchmark Basis
Total Suspended 100 mg/L National Urban Runoff Program(NURP) Study, 1983
Solids TSS
H 6 s.u. —9 s.u. NC Water Quality Standard(Range)
Non-Polar Oil & Review of other state's daily maximum benchmark
Grease 15 mg/L concentration for this more targeted O&G;NC WQS that
EPA Method 1664 does not allow oil sheen in waters
SGT-HEM
BOD 30 mg/L BPJ; Based on Secondary Treatment Regulation(40 CFR
g 133.03
COD 120 mg/L BPJ; Generally found at levels 4x BOD5 in domestic
wastewaters
Total Nitrogen 30 mg/L TKN+Nitrate+Nitrite Benchmarks (Expressed in mg/L of
N
Total Phosphorus 2 mg/L BPJ; Based on wastewater permit limits for NSW waters
Ammonia Nitrogen At 7.5 s.u. pH and summer(26°C) temperature from
(summer)
5.6 mg/L Wasteload Allocation document for the coastal plain region
worst-case scenario
Ammonia Nitrogen At 7.5 s.u. pH and winter(14°C) temperature from Wasteload
(winter)
15 mg/L Allocation document for the coastal plain region(worst-case
scenario
Page 6 of 9

Total Residual 28 µg/L '/2 FAV (NC's calculation, not EPA's)
Chlorine TRC
Hexamine 25,000 mg/L Based on the lowest available LC50 for the freshwater fish
Pime hales romelas
Formaldehyde 0.5 m /L 1/2 FAV
Methanol 6,400 mg/L Species Mean Acute Value of two 96-hour equilibrium EC50
end oints for Le orris machrochiris blue ill
Total Copper 10 /L Acute Aquatic Criterion, 1/2 FAV
Total Lead 75 /L Acute Aquatic Criterion, 1/2 FAV
Total Zinc 126 /L Acute Aquatic Criterion, 1/2 FAV
Acute Toxicity IWC =90% 1 NC DEQ Aquatic Toxicology guidance
Stormwater Pollution Prevention Plan: The proposed permit conditions reflect the EPA and NC's
pollution prevention approach to stormwater permitting. The Division's maintains that implementation
of Best Management Practices (BMPs) and traditional stormwater management practices that control the
source of pollutants meets the definition of Best Available Technology (BAT) and Best Conventional
Pollutant Control Technology(BCT). The permit conditions are not numeric effluent limitations but are
designed to be flexible requirements for implementing site-specific plans to minimize and control
pollutants in stormwater discharges associated with the industrial activity. Title 40 Code of Federal
Regulations (CFR) §122.44(k)(2) authorizes the use of BMPs in lieu of numeric effluent limitations in
NPDES permits when the agency finds numeric effluent limitations to be infeasible. The agency may
also impose BMP requirements which are "reasonably necessary" to carry out the purposes of the Act
under the authority of 40 CFR 122.44(k)(3). The conditions proposed in this draft permit are included
under the authority of both of these regulatory provisions. In essence, the pollution prevention and BMP
requirements operate as limitations on effluent discharges that reflect the application of BAT/BCT.
Flexibility in Tier Responses: Tier Two actions provide an opportunity for the permittee to propose an
alternative monitoring plan for approval by the Region:
• Alternatively, in lieu of steps 2 and 3, the permittee may, after two consecutive exceedances,
exercise the option of contacting the DEMLR Regional Engineer as provided below in Tier
Three. The Regional Engineer may direct the response actions on the part of the permittee as
provided in Tier Three, including reduced or additional sampling parameters or frequency.
• If pursuing the alternative above after two consecutive exceedances, the permittee may propose
an alternative monitoring plan for approval by the Regional Engineer.
The permit therefore allows the permittee to petition the Regional Office for monitoring changes sooner
than Tier Three (upon any four benchmark exceedances) and gives guidance on one option to take. For
example, the permittee may request that mercury only be monitored semi-annually under the tiers, or
that only parameters over the benchmark be monitored more frequently. In this way, changes to the
monitoring scheme for any outfall could be handled outside of a permit modification.
Other Proposed Requirements:
• It is standard for Stormwater Pollution Prevention Plan(SWPPP)requirements to include an
annual certification that stormwater outfalls have been evaluated for the presence of non-
stormwater discharges, and if any are identified, how those discharges are permitted or otherwise
authorized.
• Requirement to submit a request for permit modification if the facility identifies or creates any
new outfalls, removes outfalls, or alters any drainage area that changes potential pollutants.
Page 7 of 9

• The Division expects the permittee to apply best professional judgment and consider the safety
of its personnel in fulfilling sampling obligations under the permit.
• Federal regulations require electronic submittal of all discharge monitoring reports (DMRs). If a
state does not establish a system to receive such submittals, then permittees must submit DMRs
electronically to the EPA.
• Quarterly QualitativeNisual Monitoring to assure regular observation of outfalls throughout
year.
Section 4. Changes from previous permit to draft:
• Monitoring increased from semi-annually to quarterly for all parameters (qualitative and
quantitative)
• "No discharge" clarifications made
• eDMR requirement added
• Feasibility study removed
• Outfall specific monitoring implemented
• Boilerplate language moved into body of the permit; boilerplate no longer attached
• Outfalls defined in permit by outfall number(includes SWO10 which was not specifically
identified in previous permit)
• SWPPP requirements in Part B updated to incorporate superfund site clean-up activities
• Receiving stream updated based on outfall coordinates and information provided April 2022
• Monitoring for TKN and Nitrate+Nitrite replaced with monitoring for Total Nitrogen
• Monitoring for Total Manganese removed as there is no longer an NC water quality standard
• Monitoring for total hardness added for all outfalls as monitoring for hardness dependent metals
is required
• Monitoring for dissolved oxygen removed as there were no benchmark violations in the previous
permit cycle
• Benchmarks updated for parameters per guidance from DWR Standards group on stormwater
benchmarks
• Updated toxicity testing condition and monitoring frequency increased to quarterly
Section 5. Changes from draft to final:
• None
Section 6. Discussions with the Facility and Regional Office:
• Initial contact with facility: 7/13/2022
• Initial contact with Regional Office: 7/13/2022
• Draft sent to CO peer review: 7/6/2023
• Draft sent to Regional Office: 7/21/2023
• Final permit sent for supervisor signature: 8/28/2023
Page 8 of 9

Section 7. Comments received on draft permit:
• David Mattison (DWM; via email 8/2/2023): No comments. These facilities are part of the
former Wright Chemical Corporation NPL Site located in Riegelwood, Columbus County,North
Carolina.
• Cindy Moore (Aquatic Tox; via email 8/11/2023): They only change would be to update the
reporting email addy to the deq.nc.gov.
• Gina Ward (Entegris; via email 8/28/2023):
o For the upstream/downstream samples that we must pull, does the state indicate where
those are pulled from? The area where we currently go to pull our downstream sample is
in the middle of the woods. We would like to propose moving this point out to a point off
Neils Eddy Rd where there is much easier and safer access.
■ DEMLR response: As there is no significant land change or other facilities
between the current sampling location and the proposed sampling location, the
downstream sample may be taken off Neils Eddy Road.
o B-13 (b) states that there needs to be a written certification that the stormwater outfalls
have been evaluated for the presence of non-stormwater discharges. Is there a state
document for this or is this just a written statement that we create and have our Site Lead
sign?
■ DEMLR response: There is no State document for this certification.
o Do you know where the closest regional rain gauge is located in regards to our site or is
there a website where I can find that information?
■ DEMLR response: The Stormwater Program does not keep a record of this
information. You may look up rain gauges from third parties, such as NOAA or
other sources, however, using an offsite rain gauge must meet the conditions
specified in the permit.
o For outfall SW002 description on page 14 can it be amended to state "Drainage area
includes the Low Volume Manufacturing Area, chemical storage area, and runoff from
adjacent manufacturer Bakelite and their methanol tanks, ammonia tanks, formaldehyde
operation, and hexamine operation"
■ DEMLR response: Information previously provided to the Stormwater Program
stated the referenced items specifically as areas of runoff from the Bakelite site.
The outfall descriptions shall remain as is.
o For outfall SWO10 can be removed?
■ DEMLR response: Information previously provided to the Stormwater Program
stated there distillation unit. The outfall descriptions shall
remain as is.
o Because we are currently in Tier three, do we need a written action plan?
■ DEMLR response: Tier III Response requires a written action plan be prepared
and submitted to the Regional Office.
o B-4: "could be expected" is this for items that could push us over threshold parameters or
any potential pollutants?
■ DEMLR response: The list should include all potential pollutants.
o B-5: For non-stormwater discharges is this a continuous non-stormwater, such as AC
condensate or is this for one-off situations?
■ DEMLR response: The evaluation should focus on non-stormwater continuous
discharges through stormwater outfalls, but should also note any non-stormwater
discharges.
Page 9 of 9

LOCAL180
PO Box 631697 Cincinnati, OH 45263-1697
StarNews I The Dispatch
Times-News
NORTH CAROLINA ENVI-
PROOF OF PUBLICATION RONMENTAL MANAGE-
MENT COMMISSION
INTENT TO ISSUE
Brianna Young D SDCHARGE PERMITS
Joyce Sanford The mental rth Carolina Environ-
Management
Nc Division Of Energy,Mineral And Land Resources Commission Proposes to
issue NPDES stormwater
1612 Mail Service CTR discharge Permits) to the
persons) listed below.
Raleigh NC 27699-1600 Public comment or obiection
to the draft permits is
invited. Written comments
regarding the proposed
Perm it willuntil
STATE OF NORTH CAROLINA, COUNTY OF NEW HANOVER 30 days aftertheccepted Publ h date
of this notice and considered
in the final determination
The Wilmington Star-News, a newspaper printed and published in regarding permit issuance
and Permit Provisions. The
the city of Wilmington,and of general circulation in the County of Director of the NC Division
New Hanover, State of North Carolina,and personal knowledge of of Land Energy,
Mines eral,
and
the facts herein state and that the notice hereto annexed was may hold a public hearing
in the issue dated: shoals there be a significant
Published in said newspapers
degree of Public interest.
Please mail comments
and/or information requests
07/26/2023 to DEMLR at 1612 Mail
Service Center, Raleigh, NC
27699-1612.
and that the fees charged are legal. • Bakelite Synthetics [333
Neils Eddy Road, Riegel-
Sworn to and subscribed before on 07/26/2023 wood, NC 284561 has
requested renewal of permit
NCS000156 for the Bakelite
Synthetics facility in Colum-
bus County. This facility
discharges to an unnamed
tributary to Mill Creek in the
Cape Fear River Basin.
• Entegris, Inc. [333 Neils
Eddy Road, Riegelwood, NC
284561 has requested renewal
of permit NCS000533 for the
Entegris, Inc. facility in
Columbus County.This facil-
ity discharges to an
unnamed tributary to Mill
Creek in the Cape Fear
River Basin.
Legal Clerk Interested persons may visit
g DEMLR at 512 N. Salisbury
Street, Raleigh, NC 27604 to
review information on file.
_ Additional information on
Notary,State o 1,CO Sty Of Brown NPDES Permits and this
�ry notice may be found on our
(/- website:
https://deq.nc.gov/about/divis
ions/energy-mineral-and-
My commision expires land-resources/stormwo-
ter/stormwater-
Publication Cost: $200.20 Program/stormwater-public-
notices, or by contacting
Order No: 9086900 #Of Co pies: Brianna Young at
p [e-mail] or
Customer No: 745790 1 919-707-3647.
PO#:
THIS IS NOT AN INVOICE!
Please do not use this form for payment remittance.
KAITLYN FELTY
Notary Public
State of Wisconsin
I,' Page 1 of 1

Young, Brianna A
From: Gina Ward <[e-mail]>
Sent: Monday, August 28, 2023 9:15 AM
To: Young, Brianna A; Stefanie Harding
Subject: RE: [External] RE: Entegris, Inc. draft stormwater permit NCS000533
Attachments: Downstream Sampling Point and Proposed-zoomed in.PNG; Upstream-Downstream
Sampling Points-zoomed in.PNG; Upstream-Downstream Sampling Points Map.PNG
CAUTION: External email. Do not click links or open attachments unless verified. Report suspicious emails with the Report Message
button located on your Outlook menu bar on the Home tab.
Hi Brianna. Thank you for allowing us a little additional time to review. Stefanie and I have reviewed the permit draft
and have a couple of questions.
(1) For the upstream/downstream samples that we must pull, does the state indicate where those are pulled from?
The area where we currently go to pull our downstream sample is in the middle of the woods. We would like to
propose moving this point out to a point off Neils Eddy Rd where there is much easier and safer access.
(2) B-13 (b) states that there needs to be a written certification that the stormwater outfalls have been evaluated
for the presence of non-stormwater discharges. Is there a state document for this or is this just a written
statement that we create and have our Site Lead sign?
(3) Do you know where the closest regional rain gauge is located in regards to our site or is there a website where I
can find that information?
(4) For outfall SWO02 description on page 14 can it be amended to state "Drainage area includes the Low Volume
Manufacturing Area, chemical storage area, and runoof from adjacent manufacturer Bakelite and their
methanol tanks, ammonia tanks,formaldehyde operation, and hexamine operation"
(5) For outfall SWO10 can be removed?
(6) Because we are currently in Tier three, do we need a written action plan?
(7) B-4: "could be expected" is this for items that could push us over threshold parameters or any potential
pollutants?
(8) B-5: For non-stormwater discharges is this a continuous non-stormwater, such as AC condensate or is this for
one-off situations?
Thank you,
Gina
ENTEGRIS PROPRIETARY AND CONFIDENTIAL-INTERNAL
From:Young, Brianna A<[e-mail]>
Sent:Thursday,August 17, 2023 11:15 AM
To: Gina Ward <[e-mail]>; Stefanie Harding<Stefanie.Hard [e-mail]>
Subject: RE: [External] RE: Entegris, Inc. draft stormwater permit NCS000533
External Email:This email originated from outside of the organization. Do not click links or open attachments unless you recognize
the sender and know the content is safe.
That is fine. Please provide comments by Monday, August 28tn
Thank you,
i

Brianna Young, MS(she/her)
Industrial Individual Permits Coordinator
Stormwater Permitting Program
NC DEQ/Division of Energy, Mineral, and Land Resources (DEMLR)
[e-mail](e-mail preferred)PLEASE NOTE NEW EMAIL ADDRESS
**DEQ is updating its email addresses to @deq.nc.gov in phases from May 1st to June 9th. Employee email addresses may look
different, but email performance will not be impacted.
919-707-3647 (office)
Mailing address: 1612 Mail Service Center, Raleigh, NC 27699-1612
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina
Public Records Law and may be disclosed to third parties.
The Department of Environmental Quality has adjusted operations to protect the health and safety of the staff and public. Please
check with the appropriate staff before visiting our offices, as we may be able to handle your requests by phone or email.
From: Gina Ward <[e-mail]>
Sent:Thursday,August 17, 2023 10:16 AM
To:Young, Brianna A<[e-mail]>; Stefanie Harding<[e-mail]>
Subject: [External] RE: Entegris, Inc. draft stormwater permit NCS000533
CAUTION: External email. Do not click links or open attachments unless verified. Report suspicious emails with the Report Message
button located on your Outlook menu bar on the Home tab.
Hi Brianna. Stefanie has unexpectedly been out this week due to sickness. Could we possibly have another week to
review the permit and provide feedback by 8/28/23?
Thank you,
Gina
From:Young, Brianna A<[e-mail]>
Sent: Friday,July 21, 2023 8:42 AM
To: Stefanie Harding<[e-mail]>
Cc:Gina Ward <[e-mail]>
Subject: Entegris, Inc. draft stormwater permit NCS000533
External Email:This email originated from outside of the organization. Do not click links or open attachments unless you recognize
the sender and know the content is safe.
Good morning,
The draft stormwater permit for the Entegris, Inc.facility (NCS000533) has been submitted for public notice.A copy of
this draft permit will be placed in the mail to Stefanie Harding. Please provide any comments on the draft permit by
August 21, 2023.
Thank you,
2

Brianna Young, MS(she/her)
Industrial Individual Permits Coordinator
Stormwater Permitting Program
NC DEQ/Division of Energy, Mineral, and Land Resources (DEMLR)
[e-mail](e-mail preferred)PLEASE NOTE NEW EMAIL ADDRESS
**DEQ is updating its email addresses to @deq.nc.gov in phases from May 1st to June 9th. Employee email addresses may look
different but email performance will not be impacted.
919-707-3647 (office)
Mailing address: 1612 Mail Service Center, Raleigh, NC 27699-1612
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina
Public Records Law and may be disclosed to third parties.
The Department of Environmental Quality has adjusted operations to protect the health and safety of the staff and public. Please
check with the appropriate staff before visiting our offices, as we may be able to handle your requests by phone or email.
Email correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties by an authorized
state official.
ENTEGRIS PROPRIETARY AND CONFIDENTIAL—INTERNAL
ENTEGRIS PROPRIETARY AND CONFIDENTIAL—INTERNAL
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Young, Brianna A
From: Lambe, Brian
Sent: Monday,July 18, 2022 4:22 PM
To: Young, Brianna A; Sams, Dan
Subject: RE: Entegris, LLC (NCS000533) stormwater permit
Attachments: NCS000533_B I M S_20220714.pdf
Brianna,
Inspection of the Entegris site raised some issues.The site is well maintained, but it is listed as a superfund site, see
Wright Chemical Corporation. I am wary on making any decisions because of that.
The site is currently in Tier III for most if not all of the parameters at all three outfalls. Entegris needs to provide us with
a summary of all the relative data in excel format.They do use measures to reduce the metals, but I am unsure if they
could do more to reduce the contaminates. Review of the data may indicate if further action is warranted.
The difficulty this site presents is evident in their inquiry if outfall 5 can be transferred to Bakelite because of
formaldehyde concentrations in the stormwater indicates Bakelite SW, not Entegris. Entegris claims they have no
formaldehyde in their process nor is any of their process area drain to this outfall, other than deliveries. I discussed this
with Entegris, but did not make a call, rather said, probably not.There are issues with property lines, etc.
I have not sent this report to Entegris,thinking that I may need to revise after they submit data to this office.They do
maintain a SPPP and all monitoring requirements.
Brian Lambe
Environmental Specialist
910-796-7313
919-268-1678 cell
State of North Carolina I Environmental Quality I Energy,Mineral and Land Resources
127 Cardinal Drive Extension I Wilmington,NC 28405
910 796 7215 T 1 910 350 2004 F I htta://12ortal.ncdenr.ore/web/Ir/
From:Young, Brianna A<[e-mail]>
Sent:Wednesday,July 13, 2022 11:15 AM
To: Sams, Dan<[e-mail]>; Lambe, Brian <[e-mail]>
Subject: Entegris, LLC (NCS000533)stormwater permit
Good morning,
I have started reviewing the renewal application for the Entegris, LLC (NCS000533) stormwater permit. Please let me
know if there are any concerns that need to be addressed during this renewal and whether a site inspection will be
needed before the draft permit goes to public notice.
Thank you,
Brianna Young, MS(she/her/hers)
Industrial Individual Permits Coordinator
Stormwater Program
NC DEQ/Division of Energy, Mineral, and Land Resources (DEMLR)
[e-mail](e-mail preferred)
919-707-3647 (office)
1

Mailing address: 1612 Mail Service Center, Raleigh, NC 27699-1612
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina
Public Records Law and may be disclosed to third parties.
Based on the current guidance to minimize the spread of COVID-19,the Department of Environmental Quality has adjusted
operations to protect the health and safety of the staff and public. Many employees are working remotely or are on staggered shifts.
Please check with the appropriate staff before visiting our offices,as we may be able to handle your requests by phone or email.We
appreciate your patience as we continue to serve the public during this challenging time.
2

Compliance Inspection Report
Permit:NCS000533 Effective: 11/01/10 Expiration: 10/31/15 Owner: Entegris Inc
SOC: Effective: Expiration: Facility: Entegris Inc
County: Columbus 333 Neils Eddy Rd
Region: Wilmington
Riegelwood NC 28456
Contact Person:Regina Ward Title: EHS Specialist Phone: [phone]
Directions to Facility:
System Classifications: SWNC,
Primary ORC: Certification: Phone:
Secondary ORC(s):
On-Site Representative(s):
Related Permits:
Inspection Date: 07/14/2022 Entry Time 02:OOPM Exit Time: 03:OOPM
Primary Inspector:Brian P Lambe Phone:
Secondary Inspector(s):
Reason for Inspection: Routine Inspection Type: Compliance Evaluation
Permit Inspection Type: Stormwater Discharge, Individual
Facility Status: Compliant ❑ Not Compliant
Question Areas:
Storm Water
(See attachment summary)
Page 1 of 3

Permit: NCS000533 Owner-Facility:Entegris Inc
Inspection Date: 07/14/2022 Inspection Type:Compliance Evaluation Reason for Visit: Routine
Inspection Summary:
Met with Regina Ward and Stefanie Harding to review site and documentation in regards to the permit renewal. The site has
not changed significantly since the last visit.
The SPPP is well prepared and documented. Meets all required elements.
Qualitative sampling is conducted according to permit requirements.
Analytical sampling is conducted according to permit requirements.
The analytical sampling has resulted in Tier III for most if not all parameters at outfalls 2, 5, 10. Further review of data is
needed. Request compilation of data for review in excel format. Data may show need for additional measures to capture
pollutants. Currently, the facility is using waddles to capture heavy metals.
Outfall 5 is currently being effected by the adjacent permit. There is a speed bump that allegedly keeps the drainage
separate. Entegris wants consideration to remove the sampling point. They claim that their process does not contribute to
the outfall. There is evidence that Bakelite is contributing to the outfall.
The site is well maintained with no obvious failures of maintenance.
Page 2 of 3

Permit: NCS000533 Owner-Facility:Entegris Inc
Inspection Date: 07/14/2022 Inspection Type:Compliance Evaluation Reason for Visit: Routine
Stormwater Pollution Prevention Plan Yes No NA NE
Does the site have a Stormwater Pollution Prevention Plan? ❑ ❑ ❑
#Does the Plan include a General Location (USGS) map? ❑ ❑ ❑
#Does the Plan include a"Narrative Description of Practices"? ❑ ❑ ❑
#Does the Plan include a detailed site map including outfall locations and drainage areas? ❑ ❑ ❑
#Does the Plan include a list of significant spills occurring during the past 3 years? ❑ ❑ ❑
#Has the facility evaluated feasible alternatives to current practices? ❑ ❑ ❑
#Does the facility provide all necessary secondary containment? ❑ ❑ ❑
#Does the Plan include a BMP summary? ❑ ❑ ❑
#Does the Plan include a Spill Prevention and Response Plan (SPRP)? ❑ ❑ ❑
#Does the Plan include a Preventative Maintenance and Good Housekeeping Plan? ❑ ❑ ❑
#Does the facility provide and document Employee Training? 0 ❑ ❑ ❑
#Does the Plan include a list of Responsible Party(s)? 0 ❑ ❑ ❑
# Is the Plan reviewed and updated annually? 0 ❑ ❑ ❑
#Does the Plan include a Stormwater Facility Inspection Program? 0 ❑ ❑ ❑
Has the Stormwater Pollution Prevention Plan been implemented? 0 ❑ ❑ ❑
Comment:
Qualitative Monitoring Yes No NA NE
Has the facility conducted its Qualitative Monitoring? 0 ❑ ❑ ❑
Comment:
Analytical Monitoring Yes No NA NE
Has the facility conducted its Analytical monitoring? 0 ❑ ❑ ❑
#Has the facility conducted its Analytical monitoring from Vehicle Maintenance areas? ❑ ❑ 0 ❑
Comment:
Permit and Outfalls Yes No NA NE
# Is a copy of the Permit and the Certificate of Coverage available at the site? 0 ❑ ❑ ❑
#Were all outfalls observed during the inspection? ❑ ❑ ❑
# If the facility has representative outfall status, is it properly documented by the Division? ❑ ❑ ❑
#Has the facility evaluated all illicit(non stormwater)discharges? 0 ❑ ❑ ❑
Comment:
Page 3 of 3

Young, Brianna A
From: Moore, Cindy
Sent: Friday, August 11, 2023 1:10 PM
To: Young, Brianna A; Nicholson, Molly
Subject: Re: Draft stormwater permits NCS000533 and NCS000156
1 have reviewed these 2 stormwater permits. They only chnage would be to update the reporting email addy
to the deq.nc.gov
From: Nicholson, Molly<[e-mail]>
Sent: Friday,August 11, 2023 12:43 PM
To: Moore, Cindy<[e-mail]>
Subject: FW: Draft stormwater permits NCS000533 and NCS000156
Here is also a stormwater draft permit that came through recently if you want to take a look at it. Let me know if I need
to do anything with this one.
I think I have now caught up on all the draft permits that have come to me.Woohoo!
From:Young, Brianna A<[e-mail]>
Sent: Friday,July 21, 2023 10:17 AM
To: Moore, Cindy<[e-mail]>
Cc: Nicholson, Molly<[e-mail]>
Subject: Draft stormwater permits NCS000533 and NCS000156
Good morning,
The draft stormwater permits NCS000533 and NCS000156 have been submitted for public notice.These permits contain
aquatic tox monitoring. Please provide any comments by August 21, 2023.
Thank you,
Brianna Young, MS(she/her)
Industrial Individual Permits Coordinator
Stormwater Permitting Program
NC DEQ/Division of Energy, Mineral, and Land Resources (DEMLR)
[e-mail](e-mail preferred)PLEASE NOTE NEW EMAIL ADDRESS
**DEQ is updating its email addresses to @deq.nc.gov in phases from May 1st to June 9th. Employee email addresses may look
different, but email performance will not be impacted.
919-707-3647 (office)
Mailing address: 1612 Mail Service Center, Raleigh, NC 27699-1612
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina
Public Records Law and may be disclosed to third parties.
i

The Department of Environmental Quality has adjusted operations to protect the health and safety of the staff and public. Please
check with the appropriate staff before visiting our offices, as we may be able to handle your requests by phone or email.
Email correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties by an authorized
state official.
2

Young, Brianna A
From: Mattison, David
Sent: Wednesday,August 2, 2023 11:24 AM
To: Young, Brianna A; Qi, Qu
Cc: [e-mail]; [e-mail]
Subject: RE: Draft stormwater permits NCS000533 and NCS000156
Brianna,
The NCDEQ DWM Superfund Section has reviewed Draft NPDES Stormwater Permit NCS000156-Bakelite Synthetics and
Draft NPDES Stormwater Permit NCS000533-Entegris, Inc. and has no comments. These facilities are part of the former
Wright Chemical Corporation NPL Site located in Riegelwood, Columbus County, North Carolina. Please feel free to
contact me if you have any questions or concerns.
Thanks,
Dave
Please note my email address has changed to d avid.mattison9decl.nc.gov.
David B. Mattison (he/him/his)
Environmental Engineer,Superfund Section
Division of Waste Management
North Carolina Department of Environmental Quality
Office: [phone] 1 Cell: [phone]
[e-mail]
.,r.-���D.E
NORTH CAROLENA
Department of Environmental Quality
Email correspondence to and from this address is subject to the North
Carolina Public Records Law and may be disclosed to third parties.
From:Young, Brianna A<[e-mail]>
Sent: Friday,July 21, 2023 10:20 AM
To: Mattison, David <[e-mail]>; Qi, Qu <[e-mail]>
Subject: Draft stormwater permits NCS000533 and NCS000156
Good morning,
The Stormwater Permitting Program has submitted draft permits to public notice for the Entegris, Inc. (NCS000533) and
Bakelite Synthetics (NCS000156) facilities.These facilities are part of the former Wright Chemical Superfund site located
in Columbus County. Please provide any comments on the draft permits by August 21, 2023.
1

Thank you,
Brianna Young, MS(she/her)
Industrial Individual Permits Coordinator
Stormwater Permitting Program
NC DEQ/Division of Energy, Mineral, and Land Resources (DEMLR)
[e-mail](e-mail preferred)PLEASE NOTE NEW EMAIL ADDRESS
**DEQ is updating its email addresses to @deq.nc.gov in phases from May 1st to June 9th. Employee email addresses may look
different, but email performance will not be impacted.
919-707-3647 (office)
Mailing address: 1612 Mail Service Center, Raleigh, NC 27699-1612
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina
Public Records Law and may be disclosed to third parties.
The Department of Environmental Quality has adjusted operations to protect the health and safety of the staff and public. Please
check with the appropriate staff before visiting our offices, as we may be able to handle your requests by phone or email.
Email correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties by an authorized
state official.
2

Young, Brianna A
From: Regina Ward <[e-mail]>
Sent: Thursday, April 28, 2022 1:27 PM
To: Young, Brianna A
Subject: RE: [External] NCS000533
CAUTION: External email. Do not click links or open attachments unless you verify.Send all suspicious email as an attachment to
Report Spam.
Mill Creek is directly behind the site so that would be the receiving water.
ENTEGRIS PROPRIETARY AND CONFIDENTIAL—INTERNAL
From:Young, Brianna A<[e-mail]>
Sent:Wednesday,April 20, 2022 3:39 PM
To: Regina Ward <[e-mail]>
Subject: RE: [External] NCS000533
External Email:This email originated from outside of the organization. Do not click links or open attachments unless you recognize
the sender and know the content is safe.
Mill Creek is a different stream segment than Livingston Creek,therefore they are considered 2 different waterbodies
(see below). Please confirm which waterbody the outfalls discharge to.
Mill Creek Stream Index: 18-64-15

SUFhKO lAatar
Stream Index: 1$-64-15
Stream Name: Mill Creek
Description: From sours
Livingston{
Classification: C:Sw
Date of Class_: Aug ust 31
What goes this Class_ More info
mean?
Diver Bas-n: Cape Fear
Zoom to
A eme " '
Livingston Creek(Broadwater Lake) Stream Index: 18-64
2

SUFhDM 1VIIIiar CIMNSTIRKBODOM
Stream Ind ex: 16-64
Stream Name: Livingston Greek
(Brcadwater Lake)
Descr,ption: From sou rceto Gape
Fear River
Classification. G;Sw
Date of Class_: February 28 1977
What does this More info
..t Class. mean?
-- River Basin_ Gape Fear
Zoom to •••
Thank you,
Brianna Young, MS(she/her/hers)
Industrial Individual Permits Coordinator
Stormwater Program
NC DEQ/Division of Energy, Mineral, and Land Resources (DEMLR)
[e-mail](e-mail preferred)
919-707-3647(office)
Mailing address: 1612 Mail Service Center, Raleigh, NC 27699-1612
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina
Public Records Law and may be disclosed to third parties.
Based on the current guidance to minimize the spread of COVID-19,the Department of Environmental Quality has adjusted
operations to protect the health and safety of the staff and public. Many employees are working remotely or are on staggered shifts.
Please check with the appropriate staff before visiting our offices,as we may be able to handle your requests by phone or email.We
appreciate your patience as we continue to serve the public during this challenging time.
From: Regina Ward <[e-mail]>
Sent:Wednesday,April 20, 2022 3:32 PM
To:Young, Brianna A<[e-mail]>
Subject: Re: [External] NCS000533
3

CAUTION: External email. Do not click links or open attachments unless you verify.Send all suspicious email as an attachment to
Report Spam.
They all flow to the same receiving water. Mill creek is directly behind us, but my understanding is that is part of
Livingston Creek.
Get Outlook for iOS
From:Young, Brianna A<[e-mail]>
Sent:Wednesday,April 20, 2022 2:18 PM
To: Regina Ward <[e-mail]>
Subject: RE: [External] NCS000533
External Email:This email originated from outside of the organization. Do not click links or open attachments unless you recognize
the sender and know the content is safe.
Hello Gina,
Thank you for this information. The remaining information I need is confirmation of the name of the receiving stream
each discharge goes into.The one outfall in our database lists Livingston Creek (Broadwater Lake). Do all 4 outfalls
discharge to this location, or do any flow to a different waterbody?
Thank you,
Brianna Young, MS(she/her/hers)
Industrial Individual Permits Coordinator
Stormwater Program
NC DEQ/Division of Energy, Mineral, and Land Resources (DEMLR)
[e-mail](e-mail preferred)
919-707-3647 (office)
Mailing address: 1612 Mail Service Center, Raleigh, NC 27699-1612
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina
Public Records Law and may be disclosed to third parties.
Based on the current guidance to minimize the spread of COVID-19,the Department of Environmental Quality has adjusted
operations to protect the health and safety of the staff and public. Many employees are working remotely or are on staggered shifts.
Please check with the appropriate staff before visiting our offices,as we may be able to handle your requests by phone or email.We
appreciate your patience as we continue to serve the public during this challenging time.
From: Regina Ward <[e-mail]>
Sent: Wednesday,April 20, 2022 12:29 PM
To:Young, Brianna A<[e-mail]>
Subject: RE: [External] NCS000533
CAUTION: External email. Do not click links or open attachments unless you verify.Send all suspicious email as an attachment to
Report Spam.
4

Hi Brianna. Our current permit will stay in effect until the renewal occurs? Even if it is past the due date?
Stormwater outfall descriptions:
SW0014Potential Runoff from drum warehouse, monofil pond (belonging to Oak-Bark Corp.)
SWO024Potential Runoff from eyewash/safety shower freeze protection (winter months), building runoff from LVM
production area, runoff from uphill adjacent manufacturer-Bakelite),truck traffic(brake debris)
SWO05-->Potential Runoff from waste tank containments/HVM production area, building runoff, methanol unloading
(part of adjacent manufacturer-Bakelite),truck traffic (brake debris)
SW0104Potential runoff from chemical storage areas/LVM production area/Scrubber area, building runoff
Is this what you are looking for?We are a shared site with 2 other entities that are not related to Entegris. I have
included potential run-offs from those operations as well
Thank you,
Gina
ENTEGRIS PROPRIETARY AND CONFIDENTIAL—INTERNAL
From:Young, Brianna A<[e-mail]>
Sent:Wednesday, March 2, 2022 10:40 AM
To: Regina Ward <[e-mail]>
Subject: RE: [External] NCS000533
External Email:This email originated from outside of the organization. Do not click links or open attachments unless you recognize
the sender and know the content is safe.
A renewal application was submitted back in 2015 (received in our offices 8/19/2015). Since a renewal application has
already been submitted, another one is not required. However, if any information is missing or requires
confirmation/updating, I will reach out at the time renewal begins/occurs.
Brianna Young, MS(she/her)
Industrial Individual Permits Coordinator
Stormwater Program
NC DEQ/Division of Energy, Mineral, and Land Resources (DEMLR)
[e-mail](e-mail preferred during State of Emergency)
919-707-3647 (office)
Mailing address: 1612 Mail Service Center, Raleigh, NC 27699-1612
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina
Public Records Law and may be disclosed to third parties.
Based on the current guidance to minimize the spread of COVID-19,the Department of Environmental Quality has adjusted
operations to protect the health and safety of the staff and public. Many employees are working remotely or are on staggered shifts.
To accommodate these staffing changes,all DEQ office locations are limiting public access to appointments only. Please check with
the appropriate staff before visiting our offices, as we may be able to handle your requests by phone or email.We appreciate your
patience as we continue to serve the public during this challenging time.
From: Regina Ward <[e-mail]>
Sent: Wednesday, March 2, 2022 10:32 AM
5

To:Young, Brianna A<[e-mail]>
Subject: RE: [External] NCS000533
CAUTION: External email. Do not click links or open attachments unless you verify.Send all suspicious email as an attachment to
Report Spam.
Thanks Brianna. I will get the descriptions sent to you shortly. In regards to the renewal, do I need to submit a renewal
application?
Gina
ENTEGRIS PROPRIETARY AND CONFIDENTIAL—INTERNAL
From:Young, Brianna A<[e-mail]>
Sent:Wednesday, March 2, 2022 10:11 AM
To: Regina Ward <[e-mail]>
Subject: RE: [External] NCS000533
External Email:This email originated from outside of the organization. Do not click links or open attachments unless you recognize
the sender and know the content is safe.
Good morning Regina,
The type of description should be short and descriptive of the outfall (like "Building X runoff' or"SW001 runoff to V).
Right now the review for NCS000533 is scheduled to take place in 2022. Unfortunately I don't have a more specific
timeframe right now. Please let me know if you have any other questions.
Thank you,
Brianna Young, MS(she/her)
Industrial Individual Permits Coordinator
Stormwater Program
NC DEQ/Division of Energy, Mineral, and Land Resources (DEMLR)
[e-mail](e-mail preferred during State of Emergency)
919-707-3647 (office)
Mailing address: 1612 Mail Service Center, Raleigh, NC 27699-1612
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina
Public Records Law and may be disclosed to third parties.
Based on the current guidance to minimize the spread of COVID-19,the Department of Environmental Quality has adjusted
operations to protect the health and safety of the staff and public. Many employees are working remotely or are on staggered shifts.
To accommodate these staffing changes,all DEQ office locations are limiting public access to appointments only. Please check with
the appropriate staff before visiting our offices, as we may be able to handle your requests by phone or email.We appreciate your
patience as we continue to serve the public during this challenging time.
From: Regina Ward <[e-mail]>
Sent:Tuesday, March 1, 2022 3:33 PM
6

To:Young, Brianna A<[e-mail]>
Subject: RE: [External] NCS000533
CAUTION: External email. Do not click links or open attachments unless you verify.Send all suspicious email as an attachment to
Report Spam.
Hi Brianna. The receiving stream for each outfall is Livingston Creek. What kind of description do you need for the
outfalls?Also, can you tell me our renewal date for our current permit?
Thank you,
Gina
ENTEGRIS PROPRIETARY AND CONFIDENTIAL—INTERNAL
From:Young, Brianna A<[e-mail]>
Sent: Monday, February 14, 2022 12:33 PM
To: Regina Ward <[e-mail]>
Subject: RE: [External] NCS000533
External Email:This email originated from outside of the organization. Do not click links or open attachments unless you recognize
the sender and know the content is safe.
Gina,
Thank you for responding to the request. I was able to convert the discharge coordinates to the requested format
(Datum.Minutes.Seconds as that is what our database needs), however, I still need a brief description of the outfalls. I
also ask that you confirm the receiving stream for each outfall.
Thank you,
Brianna Young, MS(she/her)
Industrial Individual Permits Coordinator
Stormwater Program
NC DEQ/Division of Energy, Mineral, and Land Resources (DEMLR)
[e-mail](e-mail preferred during State of Emergency)
919-707-3647 (office)
Mailing address: 1612 Mail Service Center, Raleigh, NC 27699-1612
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina
Public Records Law and may be disclosed to third parties.
Based on the current guidance to minimize the spread of COVID-19,the Department of Environmental Quality has adjusted
operations to protect the health and safety of the staff and public. Many employees are working remotely or are on staggered shifts.
To accommodate these staffing changes,all DEQ office locations are limiting public access to appointments only. Please check with
the appropriate staff before visiting our offices, as we may be able to handle your requests by phone or email. We appreciate your
patience as we continue to serve the public during this challenging time.
From: Regina Ward <[e-mail]>
Sent: Monday, February 7, 2022 12:27 PM
7

To: McCoy, Suzanne <[e-mail]>
Cc:Young, Brianna A<[e-mail]>; Lucas, Annette<[e-mail]>
Subject: RE: [External] NCS000533
CAUTION: External email. Do not click links or open attachments unless you verify.Send all suspicious email as an attachment to
Report Spam.
Hi Suzanne. Please see the below information:
SWO01: 34.32824 degrees N, 78.20038 degrees W
SWO02: 34.32859 degrees N, 78.20189 degrees W
SWO05: 34.32939 degrees N, 78.20170 degrees W
SWO10: 34.32889 degrees N, 78.20155 degrees W
Thank you,
Gina
ENTEGRIS PROPRIETARY AND CONFIDENTIAL—INTERNAL
From: McCoy,Suzanne<[e-mail]>
Sent:Thursday,September 2, 2021 1:19 PM
To: Regina Ward <[e-mail]>
Cc:Young, Brianna A<[e-mail]>; Lucas, Annette<[e-mail]>
Subject: RE: [External] NCS000533
External Email:This email originated from outside of the organization. Do not click links or open attachments unless you recognize
the sender and know the content is safe.
Good afternoon Regina,
Please provide the latitude and longitude in Datum.Min utes.Seconds format; a 4 character identification number; and a
brief description of the outfalls via email.
We have recently hired an Individual Industrial Permit Coordinator, Brianna Young.
Please note we are under manpower constraints and it may take several days before the task will be completed.
Suzanne McCoy
Stormwater Program Administrative Specialist
Division of Energy,Mineral and Land Resources
Department of Environmental Quality
512 N.Salisbury Street,Office 640K, Raleigh, NC 27604
1612 Mail Service Center, Raleigh, NC 27699-1612
919-707-3640
Based on the current guidance to minimize the spread of COVID-19,the Department of Environmental Quality has adjusted operations to protect the health and
safety of the staff and public.Many employees are working remotely or are on staggered shifts.To accommodate these staffing changes,all DEQ office locations are
limiting public access to appointments only.Please check with the appropriate staff before visiting our offices,as we may be able to handle your requests by phone or
email.We appreciate your patience as we continue to serve the public during this challenging time.
40a;.i:'Aft];.1MA :~
PbpwftwA p16mkmwmwrW Gamllly
Email correspondence to and from this address is subject to the
8

North Carolina Public Records Law and may be disclosed to third parties.
From: Regina Ward <[e-mail]>
Sent:Thursday,September 2, 2021 12:15 PM
To: McCoy, Suzanne<[e-mail]>
Subject: RE: [External] NCS000533
CAUTION: External email. Do not click links or open attachments unless you verify.Send all suspicious email as an attachment to
Report Spam.
Hi Suzanne.The Outfalls listed on our Permit Summary are incorrect. It only lists 001. They should be as follows:
Outfall #001, 002,005, 010
How do I go about getting the additional 3 outfalls added to the summary?
Thank you,
Gina
ENTEGRIS PROPRIETARY AND CONFIDENTIAL—INTERNAL
From: McCoy,Suzanne<[e-mail]>
Sent:Tuesday,June 15, 2021 3:27 PM
To: Regina Ward <[e-mail]>
Subject: RE: [External] NCS000533
External Email:This email originated from outside of the organization. Do not click links or open attachments unless you recognize
the sender and know the content is safe.
Thank you Regina,
Attached please find a page from the application from 2015 listing the outfalls. Please confirm this information is
correct. I will need the Lat/Long for the missing outfalls.
The ownership change form from April is an incorrect form.
The table below summarizes the information that you will find in this report and the procedures for updating that
information if you find that it is incorrect.
Summary Explanation of this Item How to Update this Item if
Report Item Needed
Complete
Facility Name The official name of the facility. the Name/Ownership
Change Form
Facility The physical address of the facility. Email Suzanne McCoy
Address
9

The official name of the company according to Complete
Owner Name the Name/Ownership
the NC Secretary of State.
Change Form
A person who meets the criteria in 40 CFR
Owner 122.22 and may be responsible for a variety of Complete the Owner
Affiliation permit types. A Permit Contact Person can be
Designation/Affiliation Form
Name specified to receive correspondence on the
stormwater permit(see below).
Owner
Affiliation The mailing address for the Owner Affiliation. Email Suzanne McCoy
Address
Owner Contact A person who can be contacted to speak on behalf Email Suzanne McCoy
Person of the Owner Affiliation.
Facility A person who can be contacted to speak on behalf
Contact Email Suzanne McCoy
Person of the facility.
A person who receives correspondence specifically
Permit Contact about the stormwater permit. If a Permit Contact
Email Suzanne McCoy
Person Person is not specified,then correspondence will go
to the Owner Affiliation.
Permit Billing A person who can be contacted about billing Email Aziza Selkane
Contact matters for this permit.
Person with A person who can officially sign on behalf of the I Complete a Stormwater
Delegated Owner Affiliation for all matters related to the Delegation of Signature
Signature
Authority stormwater permit. Authority Form
Person with
Electronic A person who can submit data via the eDMR
system,this will be updated as you complete Step 2 N/A
Signature below.
Authority
Every outfall that discharges stormwater to a
receiving stream. The data on outfall number,
Outfalls Email Suzanne McCoy
description, latitude, longitude, and waterbody
must be checked for accuracy.
10

Suzanne McCoy
Stormwater Program Administrative Specialist
Division of Energy, Mineral and Land Resources
North Carolina Department of Environmental Quality
Physical: 512 N. Salisbury Street, Office 640K, Raleigh, NC 27604
Mailing: 1612 Mail Service Center, Raleigh, NC 27699-1612
Email: Suzanne.mccoy(a)ncdenr.gov
Phone: [phone]
Website:
11

Young, Brianna A
From: Lambe, Brian
Sent: Thursday, August 4, 2022 8:45 AM
To: Young, Brianna A; Sams, Dan
Subject: RE: Entegris, LLC (NCS000533) stormwater permit
From my convos with Entigris, the copper and zinc are being attributed to brake pads, a common excuse for those
exceedances. Also, zinc exceedances can come from the galvanized roofing. I do not think copper and zinc are part of
the processes at Entigris.
Entigris is interested in eliminating or changing the outfall that is directly adjacent to the Bakelite processing area.There
is a speed bump intended to direct water away from Entigris, but staff indicates that it is ineffective during a solid rain
event.They said that they have no formaldehyde in their processes. Bakelite does.
I will need to study the files again to speak of Oak Bark and Bakelite. It is a complicated site.
Brian Lambe
Environmental Specialist
910-796-7313
919-268-1678 cell
State of North Carolina I Environmental Quality I Energy,Mineral and Land Resources
127 Cardinal Drive Extension I Wilmington,NC 28405
910 796 7215 T 1 910 350 2004 F I httn://Vortal.ncdenr.org/web/ir/
From:Young, Brianna A<[e-mail]>
Sent: Wednesday,August 3, 2022 6:25 PM
To: Lambe, Brian <[e-mail]>; Sams, Dan <[e-mail]>
Subject: RE: Entegris, LLC(NCS000533) stormwater permit
I received the DMR data from Entegris(see attached; highlights are my own where it looks like benchmarks were
exceeded). Please review and let me know if you feel an internal meeting is needed. I think it might be helpful to talk
about this site as a whole (all stormwater permits) as I am working on the Bakelite permit as well and have questions
about the Oak-Bark facility on the site.
Let me know your thoughts.
Brianna Young, MS(she/her/hers)
Industrial Individual Permits Coordinator
Stormwater Program
NC DEQ/Division of Energy, Mineral, and Land Resources (DEMLR)
[e-mail](e-mail preferred)
919-707-3647 (office)
Mailing address: 1612 Mail Service Center, Raleigh, NC 27699-1612
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina
Public Records Law and may be disclosed to third parties.
1

Based on the current guidance to minimize the spread of COVID-19,the Department of Environmental Quality has adjusted
operations to protect the health and safety of the staff and public. Many employees are working remotely or are on staggered shifts.
Please check with the appropriate staff before visiting our offices,as we may be able to handle your requests by phone or email.We
appreciate your patience as we continue to serve the public during this challenging time.
From: Lambe, Brian <[e-mail]>
Sent: Monday,July 18, 2022 4:33 PM
To:Young, Brianna A<[e-mail]>; Sams, Dan <[e-mail]>
Subject: RE: Entegris, LLC(NCS000533) stormwater permit
Lets see the numbers first.
Brian Lambe
Environmental Specialist
910-796-7313
919-268-1678 cell
State of North Carolina I Environmental Quality I Energy,Mineral and Land Resources
127 Cardinal Drive Extension I Wilmington,NC 28405
910 796 7215 T 1 910 350 2004 F I httn://noml.ncdenr.or web/ir/
From:Young, Brianna A<[e-mail]>
Sent: Monday,July 18, 2022 4:32 PM
To: Lambe, Brian <[e-mail]>; Sams, Dan <[e-mail]>
Subject: RE: Entegris, LLC(NCS000533) stormwater permit
Thanks for the update. I sent an add-info request on July 13t" and an electronic version of the data was one of the items I
asked for. I'll pass that along once I receive it. Do you feel we need an internal meeting to discuss (before or after data is
received)?
Brianna Young, MS(she/her/hers)
Industrial Individual Permits Coordinator
Stormwater Program
NC DEQ/Division of Energy, Mineral, and Land Resources (DEMLR)
[e-mail](e-mail preferred)
919-707-3647 (office)
Mailing address: 1612 Mail Service Center, Raleigh, NC 27699-1612
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina
Public Records Law and may be disclosed to third parties.
Based on the current guidance to minimize the spread of COVID-19,the Department of Environmental Quality has adjusted
operations to protect the health and safety of the staff and public. Many employees are working remotely or are on staggered shifts.
Please check with the appropriate staff before visiting our offices,as we may be able to handle your requests by phone or email.We
appreciate your patience as we continue to serve the public during this challenging time.
From: Lambe, Brian <[e-mail]>
Sent: Monday,July 18, 2022 4:22 PM
To:Young, Brianna A<[e-mail]>; Sams, Dan <[e-mail]>
Subject: RE: Entegris, LLC(NCS000533) stormwater permit
2

Brianna,
Inspection of the Entegris site raised some issues.The site is well maintained, but it is listed as a superfund site, see
Wright Chemical Corporation. I am wary on making any decisions because of that.
The site is currently in Tier III for most if not all of the parameters at all three outfalls. Entegris needs to provide us with
a summary of all the relative data in excel format.They do use measures to reduce the metals, but I am unsure if they
could do more to reduce the contaminates. Review of the data may indicate if further action is warranted.
The difficulty this site presents is evident in their inquiry if outfall 5 can be transferred to Bakelite because of
formaldehyde concentrations in the stormwater indicates Bakelite SW, not Entegris. Entegris claims they have no
formaldehyde in their process nor is any of their process area drain to this outfall, other than deliveries. I discussed this
with Entegris, but did not make a call, rather said, probably not.There are issues with property lines, etc.
I have not sent this report to Entegris,thinking that I may need to revise after they submit data to this office. They do
maintain a SPPP and all monitoring requirements.
Brian Lambe
Environmental Specialist
910-796-7313
919-268-1678 cell
State of North Carolina I Environmental Quality I Energy,Mineral and Land Resources
127 Cardinal Drive Extension I Wilmington,NC 28405
910 796 7215 T 1 910 350 2004 F I htW://i)ortal.ncdenr.or web/Ir/
From:Young, Brianna A<[e-mail]>
Sent:Wednesday,July 13, 2022 11:15 AM
To: Sams, Dan<[e-mail]>; Lambe, Brian <[e-mail]>
Subject: Entegris, LLC(NCS000533)stormwater permit
Good morning,
I have started reviewing the renewal application for the Entegris, LLC (NCS000533) stormwater permit. Please let me
know if there are any concerns that need to be addressed during this renewal and whether a site inspection will be
needed before the draft permit goes to public notice.
Thank you,
Brianna Young, MS(she/her/hers)
Industrial Individual Permits Coordinator
Stormwater Program
NC DEQ/Division of Energy, Mineral, and Land Resources (DEMLR)
[e-mail](e-mail preferred)
919-707-3647 (office)
Mailing address: 1612 Mail Service Center, Raleigh, NC 27699-1612
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina
Public Records Law and may be disclosed to third parties.
Based on the current guidance to minimize the spread of COVID-19,the Department of Environmental Quality has adjusted
operations to protect the health and safety of the staff and public. Many employees are working remotely or are on staggered shifts.
Please check with the appropriate staff before visiting our offices,as we may be able to handle your requests by phone or email.We
appreciate your patience as we continue to serve the public during this challenging time.
3

4

Young, Brianna A
From: Regina Ward <[e-mail]>
Sent: Monday, August 1, 2022 4:49 PM
To: Young, Brianna A; Lambe, Brian
Subject: RE: [External] RE: Entegris, LLC (NCS000533) stormwater permit application
Attachments: 2020 Stormwater data.xlsx;Jan 2018-Dec 2019 Stormwater Data.xlsx;Jan 2016-Dec 2017
Stormwater Data.xlsx;Jan 2021-June 2022 Stormwater Data.xlsx; NPDES Stormwater
renewal - 2015.docx; NPDES Stormwater renewal - 2015 with revisions for 2022.docx;
Entegris Evacuate route PDF.pdf,Jan 2014-Dec 2015 Stormwater Data.xlsx
CAUTION: External email. Do not click links or open attachments unless you verify.Send all suspicious email as an attachment to
Report Spam.
Hi Brianna. Please see the attached data regarding our stormwater from 2014-current and answers to your questions.
• Description of industrial activities in each drainage area
SW001 4 This outfall has the potential to collect stormwater runoff from our drum warehouse chemical
storage area and maintenance shop area. It is possible that it also collects runoff from the lined monofil
which is owned by Oak-Bark. When Brian was onsite we discussed pulling samples from a more
centralized collection area. I can send pictures if needed.
SW0024This outfall collects stormwater runoff from various areas. It has the potential to catch the
runoff from down the hill from Bakelite, from in front of Bakelite's methanol tanks and formaldehyde
operation, from outside Entegris' breakroom, Entegris' low volume manufacturing area, and a chemical
storage area.
SW0054This outfall has the potential to collect stormwater runoff from behind our hazardous waste
storage tanks and from our high volume manufacturing area. This outfall could also possibly collect
stormwater runoff from rainwater that flows through a"through-pipe"that is in front of our waste tanks
and can collect water from chemical staging areas, Bakelite methanol unloading, Bakelite Formaldehyde
production, Entegris filtration area. I can send pictures if needed.
SWO104 This outfall has the potential to collect runoff from our Low Volume Production Area, a
building that has a centrifugal distillation unit that processes a non-hazardous material, and chemical
storage areas.
• An electronic spreadsheet summarizing all of the monitoring data that has been collected since the
effective date of the current permit; See attached
• Verification that the information in the renewal application is still complete and correct; and The
previous renewal information states that the receiving stream is Livingston Creek(Broadwater Lake). I
was under the impression that Mills Creek is directly behind the site and is the receiving water. Also,
please remove Brandon Sproles and add me as the contact for the site. Also, Silar should be changed to
Entegris, Inc.
• An explanation of any operational changes since the renewal application was submitted. Previously the
site was operating under Silar, Inc. We are now owned and operated by Entegris, Inc. Since the last
renewal we have removed 2 wastewater tanks (2 x 5600-gal) and replaced them with 2 x 8500-gal
wastewater tanks. We are also taking the 3800-gal wastewater tank out of service and removing it. There
were also a couple of reactors that were removed from service. Other than those items, there have been
no other operational changes.
1

I have attached a copy of our evacuation map which shows an overview of the area and the outfalls are labeled
on it. Feel free to reach out if you want to walk through the map and the various locations or if you have
additional questions.
Thank you,
Gina Ward
Sr. EHS Specialist
SCEM
T+1 910 655 4212 M+1 910 840 2258
&:> enteeris.com
Efit6ff Ns
333 Neils Eddy Road PACE
Riegelwood, NC 28456 USA �-_..w-•
ENTEGRIS PROPRIETARY AND CONFIDENTIAL—INTERNAL
From:Young, Brianna A<[e-mail]>
Sent: Wednesday,July 13, 2022 11:45 AM
To: Regina Ward <[e-mail]>; Stefanie Harding<[e-mail]>
Subject: RE: [External] RE: Entegris, LLC(NCS000533) stormwater permit application
External Email:This email originated from outside of the organization. Do not click links or open attachments unless you recognize
the sender and know the content is safe.
Hello Regina,
Yes,the application we have is from August 2015. Please let me know if you have any questions as you work through the
request.
Thank you,
Brianna Young, MS(she/her/hers)
Industrial Individual Permits Coordinator
Stormwater Program
NC DEQ/Division of Energy, Mineral, and Land Resources (DEMLR)
[e-mail](e-mail preferred)
919-707-3647 (office)
Mailing address: 1612 Mail Service Center, Raleigh, NC 27699-1612
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina
Public Records Law and may be disclosed to third parties.
2

Based on the current guidance to minimize the spread of COVID-19,the Department of Environmental Quality has adjusted
operations to protect the health and safety of the staff and public. Many employees are working remotely or are on staggered shifts.
Please check with the appropriate staff before visiting our offices,as we may be able to handle your requests by phone or email.We
appreciate your patience as we continue to serve the public during this challenging time.
From: Regina Ward <[e-mail]>
Sent: Wednesday,July 13, 2022 11:27 AM
To:Young, Brianna A<[e-mail]>; Stefanie Harding<[e-mail]>
Subject: [External] RE: Entegris, LLC(NCS000533) stormwater permit application
CAUTION: External email. Do not click links or open attachments unless you verify.Send all suspicious email as an attachment to
Report Spam.
Hi Brianna.Thank you for reaching out regarding our permit renewal. I will begin working on the requested information
below. I would just like to confirm that I review the correct renewal application and the one referenced below is the one
that is dated from 2015?
Thank you,
Gina Ward
Sr. EHS Specialist
SCEM
T+1 910 655 4212 M+1 910 840 2258
6bentegris.com
Efit6ff Ns inv am. @
333 Neils Eddy Road PACE
Riegelwood, NC 28456 USA ��•mw-•
ENTEGRIS PROPRIETARY AND CONFIDENTIAL—INTERNAL
From:Young, Brianna A<[e-mail]>
Sent:Wednesday,July 13, 2022 11:13 AM
To: Stefanie Harding<[e-mail]>; Regina Ward <[e-mail]>
Subject: Entegris, LLC (NCS000533)stormwater permit application
External Email:This email originated from outside of the organization. Do not click links or open attachments unless you recognize
the sender and know the content is safe.
Good morning,
I am working on renewing the individual stormwater permit for the Entegris, LLC (NCS000533). I need
additional information in order to 1) confirm that the information I have is correct and 2) make sure the permit
adequately serves the needs of the facility. Please provide the following:
3

• Description of industrial activities in each drainage area;
• An electronic spreadsheet summarizing all of the monitoring data that has been collected since the
effective date of the current permit;
• Verification that the information in the renewal application is still complete and correct; and
• An explanation of any operational changes since the renewal application was submitted.
Enter your stormwater permit number into the Stormwater Permit Summary Report and you will see a form that
includes the address of the facility, contact information for the permit, and the regulated stormwater outfall(s)for the
facility. Please review the facility information to make sure it is correct. Information can be updated using the links
provided below,where applicable:
• Facility/Company name or ownership: Name/Ownership Change Form
• Owner Affiliation (Legally responsible person; i.e., someone with the company who is designated to
represent the company per signatory requirements or another authorized representative): Permit Contact
Update Request Form
• Delegation of Signature Authority (DOSA): Permit Contact Update Request Form
• Billing contact: Permit Contact Update Request Form
• Permit contact: Permit Contact Update Request Form
• Facility contact: Permit Contact Update Request Form
• Facility address only: Email Bethany og ulias
• Stormwater outfall information: Email Bethany Georgoulias
• Visit the eDMR Six Steps website and complete Steps 1 and 2.
• Pay outstanding permit fees: Stormwater ePUment website
Once I have the above listed information, I can continue my review. You will receive a draft permit for a 30-day
comment period. During this time we will be able to address any comments or concerns you have. During the
same 30-day period, the draft will be sent to a Regional Office staff member for review as well as out to public
notice. Once all comments and concerns are addressed, you may be issued a final permit.
Please contact me if you have any questions.
Thank you,
Brianna Young, MS(she/her/hers)
Industrial Individual Permits Coordinator
Stormwater Program
NC DEQ/Division of Energy, Mineral, and Land Resources (DEMLR)
[e-mail](e-mail preferred)
919-707-3647 (office)
Mailing address: 1612 Mail Service Center, Raleigh, NC 27699-1612
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina
Public Records Law and may be disclosed to third parties.
Based on the current guidance to minimize the spread of COVID-19,the Department of Environmental Quality has adjusted
operations to protect the health and safety of the staff and public. Many employees are working remotely or are on staggered shifts.
Please check with the appropriate staff before visiting our offices,as we may be able to handle your requests by phone or email.We
appreciate your patience as we continue to serve the public during this challenging time.
4

5

AL
;A Permit Coverage NPDES Permit Number
NCDENR Renewal Application Form NCS000533
National Pollutant Discharge Elimination System
Stormwater Individual Permit
Please provide your permit number in box in the upper right hand corner, complete the information in the space provided
below and return the completed renewal form along with the required supplemental information to the address indicated.
Owner Information * Address to which permit correspondence will be mailed
Owner/Organization Name: S�LLG Entegris, Inc
Owner Contact: Branden SpFeles Stefanie Harding
Mailing Address: 333 Neils Eddy Road, Riegelwood, NC 28456
Phone Number: 910-655-4212
Fax Number: 910-655-8201
E-mail address: "s^~^Ies@sm!aF corn [e-mail]
Facility Information
Facility Name: Sala,= LLG Entegris, Inc
Facility Physical Address: 333 Neils Eddy Road, Riegelwood, NC 28456
Facility Contact: Branden Sprel Gina Ward
Mailing Address: 333 Neils Eddy Road, Riegelwood, NC 28456
Phone Number: 910-655-4212 ext 101
Fax Number: 910-655-82014212
E-mail address: [e-mail]
Permit Information
Permit Contact: Branden Sprel Gina Ward
Mailing Address: 333 Neils Eddy Road, Riegelwood, NC 28456
Phone Number: 910-655-4212 ext 101
Fax Number: 910-655-8201
E-mail address: SPF0les@silaF corn Gina.WardPEntegris.com
Discharge Information
Receiving Stream: Livingston Creek(Broadwater Lake) Should this be Mills Creek?
Stream Class: C
Basin: Sw Stream in the Cape Fear River Basin
Sub-Basin: N/A
Number of Outfalls: 4
Facility/Activity Changes Please describe below any changes to your facility or activities since issuance of your permit. Attached a
separate sheet if necessary.
issuance.There have been ne ehanges te eur facility since the last permit Facility was purchased by Entegris, Inc.
CERTIFICATION
I certify that I am familiar with the information contained in the application and that to the best of my knowledge and belief
such information is true, complete and accurate.
Signature Date
Print or type name of person signing above Title
SW Individual Permit Coverage Renewal
Please return this completed application form Stormwater Permitting Program
1612 Mail Service Center
Raleigh, North Carolina 27699-1612
ENTEGRIS PROPRIETARY

and requested supplemental information to:
ENTEGRIS PROPRIETARY AND CONFIDENTIAL-INTERNAL

AL
;A Permit Coverage NPDES Permit Number
NCDENR Renewal Application Form NCS000533
National Pollutant Discharge Elimination System
Stormwater Individual Permit
Please provide your permit number in box in the upper right hand corner, complete the information in the space provided
below and return the completed renewal form along with the required supplemental information to the address indicated.
Owner Information * Address to which permit correspondence will be mailed
Owner/Organization Name: Silar, LLC
Owner Contact: Brandon Sproles
Mailing Address: 333 Neils Eddy Road, Riegelwood, NC 28456
Phone Number: 910-655-4212
Fax Number: 910-655-8201
E-mail address: [e-mail]
Facility Information
Facility Name: Silar,LLC
Facility Physical Address: 333 Neils Eddy Road, Riegelwood, NC 28456
Facility Contact: Brandon Sproles
Mailing Address: 333 Neils Eddy Road, Riegelwood, NC 28456
Phone Number: 910-655-4212
Fax Number: 910-655-4212
E-mail address: [e-mail]
Permit Information
Permit Contact: Brandon Sproles
Mailing Address: 333 Neils Eddy Road, Riegelwood, NC 28456
Phone Number: 910-655-4212
Fax Number: 910-655-8201
E-mail address: [e-mail]
Discharge Information
Receiving Stream: Livingston Creek(Broadwater Lake)
Stream Class: C
Basin: Sw Stream in the Cape Fear River Basin
Sub-Basin: N/A
Number of Outfalls: 4
Facility/Activity Changes Please describe below any changes to your facility or activities since issuance of your permit. Attached a
separate sheet if necessary.
There have been no changes to our facility since the last permit issuance.
CERTIFICATION
I certify that I am familiar with the information contained in the application and that to the best of my knowledge and belief
such information is true, complete and accurate.
Signature Date
Print or type name of person signing above Title
SW Individual Permit Coverage Renewal
Please return this completed application form Stormwater Permitting Program
and requested supplemental information to: 1612 Mail Service Center
Raleigh, North Carolina 27699-1612

ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/l mg/l mg/1 mg/l mg/l mg/1 mg/1
1-Sitar Wh 2/21/2014
2-Lab We 2/21/2014 41.20 29.4 126 13.30 19.4 1.24 0.110
5 -Sitar W 2/21/2014 19.60 31.3 115 6.37 10.6 2.09 0.087
010 2/21/2014
the Hill(0 2/21/2014 1 64.50 32.7 126.0 l l.50 16 0.63 0.18
05 Upstrea 2/21/2014
5 Downstre 2/21/2014
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/l mg/l mg/l mg/l mg/l mg/l mg/l
1-Sitar Wh 3/25/2014 13.00 8.91 53.1 <0.100 2.42 1.49 0.100
2-Lab We 3/25/2014 12.20 7.68 44.3 <0.100 3.03 1.11 0.064
5 -Sitar W 3/25/2014 8.75 13.9 57.5 <0.100 2.12 0.661 <0.050
010 3/25/2014 4.50 9.66 33.2 <0.100 <1.00 0.801 <0.050
the Hill(0 3/25/2014 22.90 25.4 102.0 3.94 16 2.34 0.16
05 Upstrea 3/25/2014
5 Downstre 3/25/2014
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/1 mg/1 mg/1 mg/1 mg/1 mg/1 mg/1
1-Sitar Wh 4/30/2014 105.00 14.9 55.3 2.73 5.76 1.08 <0.050
2-Lab We 4/30/2014 26.80 14.6 102 <0.100 3.64 0.951 0.120
5 -Sitar W 4/30/2014 15.00 25.5 86.3 3.03 9.09 0.962 0.085
010 4/30/2014 27.00 121 553 2.42 5.76 0.826 0.150
the Hill(0 4/30/2014 21.50 19.0 113.0 6.67 13 6.54 <0.050
05 Upstrea 4/30/2014
5 Downstre 4/30/2014

ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/l mg/l mg/l mg/l mg/l mg/l mg/l
1-Sitar Wh 5/15/2014 NA NA NA NA NA NA NA
2-Lab We 5/15/2014 28.8 14.0 53.3 3.33 6.97 0.502 0.11
5 -Sitar W 5/15/2014 17.5 24.2 70.6 2.73 6.97 0.621 0.12
010 5/15/2014 7.75 >142.01 2900 3.94 7.58 1.77 0.14
the Hill(0 5/15/2014 30.5 35.4 133 74 80 2.56 0.21
05 Upstrea 5/15/2014
5 Downstre 5/15/2014
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/l mg/l mg/l mg/l mg/l mg/l mg/l
1-Sitar Wh 7/15/2014 NA NA NA NA NA NA NA
2-Lab We 7/15/2014 8.75 28.0 90.5 6.67 13.3 1.65 0.099
5 -Sitar W 7/15/2014 5.75 21.2 68.4 4.24 7.88 1.56 0.23
010 7/15/20141 12.5 1 96.7 162 12.4 15.8 1.27 0.18
the Hill(0 7/15/2014 12.5 20.5 102 9.7 14.6 17.4 0.094
05 Upstrea 7/15/2014
5 Downstre 7/15/2014
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/l mg/l mg/1 mg/l mg/l mg/l mg/l
1-Silar Wh 7/28/2014 24.9 6.44 53.1 <0.100 3.33 0.871 0.15
2-Lab We 7/15/2014 8.75 28.0 90.5 6.67 13.3 1.65 0.099
5 -Sitar W 7/15/2014 5.75 21.2 68.4 4.24 7.88 1.56 0.23
010 7/15/2014 12.5 96.7 162 12.4 15.8 1.27 0.18
the Hill(0 7/15/20�12.520.5 102 9.7 14.605 Upstrea 7/15/20

5 Downstre 7/15/2014
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/l mg/l mg/l mg/l mg/l mg/l mg/l
)I-Sitar Wh 10/15/2014 NA NA NA NA NA NA NA
2-Lab We 10/15/2014 16.8 3.01 21.8 <0.100 <1.00 0.702 0.084
5 -Sitar W 10/15/2014 15.8 9.13 34.7 <0.100 <1.00 0.991 0.13
010 10/15/2014 3.20 7.84 33.8 <0.100 71.5 0.934 0.057
the Hill(0 10/15/2014 26.8 8.05 35.3 <0.100 6.09 3.02 0.13
05 Upstrea 10/15/2014
5 Downstre 10/15/2014
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/l mg/l mg/l mg/l mg/l mg/l mg/l
)I-Sitar Wh 12/22/2014 22.1 16.6 69.7 4.22 4.22 1.18 1.10
2-Lab We 12/22/2014 50.0 3.96 40.1 <0.100 338 0.544 1.13
5 -Sitar W 12/22/2014 31.0 4.89 47.3 <0.100 <1.00 0.506 <0.100
010 12/22/2014 3.50 6.87 13.6 3.75 397 0.827 <0.100
the Hill(0 12/22/2014 20.2 6.00 46.4 5.39 6.33 iiw
05 Upstrea 12/22/2014
5 Downstre 12/22/2014
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/l mg/l mg/l mg/l mg/l mg/l mg/l
)I-Sitar Wh 1/12/2015 10.0 5.62 41.7 <0.100 3.52 0.651 <0.100
2-Lab We 1/12/2015 35.6 5.05 39.5 <0.100 4.57 0.786 0.121
5 -Sitar W 1/12/2015 27.2 10.5 48.1 <0.100 3.52 0.548 <0.100
010 1/12/2015 14.0 1 5.14 1 30.9 1 <0.100 1 3.17 0.824 1 <0.100

the Hill(0 1/12/2015 7.20 14.7 73.5 10.10 11.6 2.12 <0.100
05 Upstrea 1/12/2015
5 Downstre 1/12/2015
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/l mg/l mg/1 mg/l mg/1 mg/1 mg/l
1-Sitar Wh 3/14/2015 NA NA NA NA NA NA NA
2-Lab We 3/14/2015 18.4 13.5 78.2 4.98 8.96 .439 .16
5 -Sitar W 3/14/2015 20.0 9.37 30.9 <0.100 4.98 0.359 0.13
010 3/14/2015 17.6 11.6 43.8 <0.100 6.30 0.400 0.17
the Hill(0 3/14/2015 17.00 42.2 250.0 37.20 62.4 1.16 O.13
05 Upstrea 3/14/2015
5 Downstre 3/14/2015
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphoru
Outfall mo/dd/yr mg/l mg/l mg/l mg/l mg/l mg/l mg/l
1-Sitar Wh 4/9/2015 NA NA NA NA NA NA NA
2-Lab We 4/9/2015 13.6 12.0 64.6 1.38 5.18 2.36 0.17
5 -Sitar W 4/9/2015 17.0 14.6 102 <0.100 3.80 1.76 0.20
010 4/9/2015 5.14 13.7 35.0 <0.100 <1.00 2.90 0.13
the Hill(0 4/9/2015 1 73.00 29.0 118.0 <0.100 12.4 2.83 0.25
05 Upstrea 4/9/2015
5 Downstre 4/9/2015
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/1 mg/l mg/1 mg/l mg/1 mg/l mg/1
1-Silar Wh 6/3/2015 3.60 5.24 45.5 <0.100 <1.00 1.30 0.159
2-Lab We 6/3/2015 10.0 3.56 24.7 <0.100 <1.00 2.57 0.095
5 -Sitar W 6/3/2015 2.20 4.82 25.9 <0.100 <1.00 1.71 0.128

010 6/3/2015 2.40 9.95 16.3 <0.100 I <1.00 1.61 0.099
the Hill(0 6/3/2015 3.60 6.9 49.9 <0.100 4.9 11.50 0.117
05 Upstrea 6/3/2015
5 Downstre 6/3/2015
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphoru
Outfall mo/dd/yr mg/l mg/l mg/l mg/l mg/l mg/l mg/l
1-Sitar Wh 7/13/2015 NA NA NA NA NA NA NA
2-Lab We 7/13/2015 12.4 14 113 3.3 9.7 0.71 0.21
5 -Sitar W 7/13/2015 11.3 18 134 3.3 8.7 0.54 0.78
010 7/13/2015 8.7 28 109 5.6 13.0 1.74 0.17
E
0 7/13/2015 17.60 11.0 100.0 2.90 7.2 8.54 0.19
a 7/13/2015
e 7/13/2015
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/1 mg/l mg/1 mg/l mg/1 mg/1 mg/l
1-Silar Wh 8/19/2015 NA NA NA NA NA NA NA
2-Lab We 8/19/2015 44.0 12 132 3.7 7.7 0.87 0.28
5 -Silar W 8/19/2015 49.3 11 139 2.5 5.1 0.47 0.24
010 8/19/2015 5.4 15 93 3.4 5.1 1.53 0.20
the Hill(0 8/19/2015 61.70 13.0 155.0 3.10 10.6 6.19 0.38
05 Upstrea 8/19/2015
5 Downstre 8/19/2015
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg mg/l mg/l mg/l mg/l mg/l mg/l
11-SitarWhi 11/2/20151 175 1 4 1 57 1 <0.2 1 0.7 1 0.12 0.2

2-Lab We 11/2/2015 74.5 <2 30 <0.2 <0.5 0.03 0.17
5 -Silar W 11/2/2015 23.6 4 <20 <0.2 <0.5 0.05 0.41
O10 11/2/2015 10.7 4 20 0.2 <0.5 0.08 0.11
the Hill(0 11/2/2015 53 40 500 1.5 97.6 0.47 0.23
05 Upstrea 11/2/2015
5 Downstre 11/2/2015
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/l mg/l mg/1 mg/1 mg/1 mg/1 mg/1
)I-Silar Whse
2-Lab We 12/14/2015 102 14 94 3.7 6.1 0.42 1.31
5 -Silar W 12/14/2015 72.7 8 96 3.1 5.4 0.28 1.12
010 12/14/2015 45.3 8 48 1.5 3.0 0.21 1.25
the Hill(0 12/14/201 552.3 22 182 38.6 58.5 4.05 1.33
05 Upstrea 12/14/2015
5 Downstre 12/14/2015

77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
<1.0 0 24 26.100 0.03700 0.250 <0.0500 0.00219 <5.00
<1.0 0 <10 15.300 0.09600 0.3 <0.0500 <0.00100 <5.00
<1 0 17.0 21.400 0.0470 0.31 NA 0.00347 <5
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
<1.0 0 <10 1.280 0.00700 0.013 <0.0500 <0.0010 <5.00
<1.0 0 <10 2.160 0.02200 0.166 <0.0500 0.00150 <5.00
<1.0 0 <10 1.670 0.04900 0.521 <0.0500 <0.0010 <5.00
<1.0 0 <10 2.310 0.01600 0.214 <0.0500 <0.0010 <5.00
<1.0 0 22.0 21.900 0.0230 0.192 NA 0.00700 <5.00
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
<1.0 0 <10 2.260 0.01300 0.1 0.027 0.00320 <5.00
<1.0 0.001 <10 7.620 0.03000 0.340 0.038 0.00360 <5.00
<1.0 0 <10 8.100 0.08300 0.53 0.033 0.00170 <5.00
<1.0 0 <10 7.260 0.02400 0.14 0.02 0.00200 <5.00
<1.0 0 <10 11.200 0.0310 0.16 NA 0.00220 <5.00

77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
NA NA NA NA NA NA NA NA NA
<1.0 0 <10 7.59 0.022 0.17 0.018 0.0020 <5.00
<1.0 0 <10 8.21 0.10 0.76 0.028 0.0016 <5.00
<1.0 0.012 <10 11.8 0.045 0.39 0.048 0.0013 1 <5.00
1.6 0 11 25.8 0.042 0.20 NA 0.0022 <5.00
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
NA NA NA NA NA NA NA NA NA
<1.0 0 <10 4.77 0.023 0.146 <0.0500 0.0015 2.95
<1.0 0.013 <10 2.74 0.044 0.352 <0.0500 <0.0010 1.36
<1.0 0 <10 5.29 0.078 0.848 0.320 0.0011 1.92
<1.0 0 14 6.74 0.028 0.122 NA 0.0014 2.22
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
<1.0 0 <10 1.66 0.026 0.0818 <0.0500 0.0010 0.850
<1.0 0 <10 4.77 0.023 0.146 <0.0500 0.0015 2.95
<1.0 0.013 <10 2.74 0.044 0.352 <0.0500 <0.0010 1.36
<1.0 0 <10 5.29 0.078 0.848 0.320 0.0011 1.92
<1.0 0 14 6.74 0.028 0.122 NA 0.0014 2.22

77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
NA NA NA NA NA NA NA NA NA
<1.0 .027 <10 1.60 0.0095 0.071 0.010 0.0014 1.02
<1.0 .037 <10 2.86 0.042 0.21 0.017 0.0025 1.42
<1.0 0 <10 1.46 0.017 0.26 0.022 0.0051 2.28
<1.0 .022 11 7.45 0.017 0.078 NA 0.0019 1.31
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
<1.0 0 <10 1.54 0.0140 0.0490 0.0160 <0.00300 4.38
<1.0 0 <10 1.45 0.0210 0.178 0.0230 <0.00300 2.80
<1.0 0 <10 3.58 0.0780 0.361 0.0260 0.00700 2.55
<1.0 0 <10 2.07 0.0160 .237 0.0120 <0.00300 1.70
<1.0 .020 NA 7.71 0.0240 0.0960 NA <0.00300 2.78
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/1 mg/l
<1.0 .029 <10 0.505 0.0100 0.0480 0.00700 <0.00300 1.09
<1.0 0 <10 0.590 0.0270 0.157 0.0210 <0.00300 1.98
7.7 0 <10 0.983 0.0450 0.332 0.0240 <0.00300 1.15
71.0 .005 <10 0.484 0.0110 0.0550 1 0.00600 <0.00300 1.95

2.8 0.029 14.0 4.590 0.0220 0.08 NA <0.00300 2.26
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/1 mg/l mg/l mg/l mg/l mg/l mg/l
NA NA NA NA NA NA NA NA NA
<1.0 0 13 13.6 0.0205 0.0900 0.0120 <0.00150 <5.00
<1.0 0 <10 5.49 0.0440 0.175 0.00500 <0.00300 <5.00
<1.0 .003 <10 8.51 0.0325 0.276 0.0250 <0.00150 <5.00
<1.0 0 99.0 69.3 0.0295 0.106 NA <0.00150 <5.00
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
NA NA NA NA NA NA NA NA NA
<1.0 0 81.7 6.66 0.0245 0.0955 0.0190 <0.00150 <5.00
<1.0 .010 <10 4.62 0.118 0.382 0.0300 0.00200 <5.00
<1.0 0 <10 6.88 0.0305 0.330 0.0205 <0.00150 <5.00
<1.0 0.001 16.0 16.6 0.0280 0.168 NA 0.00200 <5.00
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/1 mg/l
<1.0 .027 <10 0.558 0.0100 0.0360 0.00500 <0.00300 <5.00
<1.0 0 <10 2.28 0.0100 0.0750 0.00900 <0.00300 6.10
<1.0 .014 <10 1.68 0.0380 0.120 0.0110 <0.00300 <5.00

<1.0 .011 <10 2.85 0.0170 0.194 1 0.0510 1 <0.00300 <5.00
<1.0 0.021 <10 5.4 0.0190 0.054 NA <0.00300 <5.00
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
NA NA NA NA NA NA NA NA NA
<10 0.003 <10 0.575 0.026 0.104 0.019 <0.01 <5
<10 0.007 <10 0.724 0.062 0.338 0.034 <0.01 <5
<10 0.018 <10 1.21 0.060 0.583 0.128 <0.01 <5
<10 0.018 <10 0.7 0.0320 0.107 NA <0.01 <5
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/1 mg/l mg/l mg/l mg/l mg/l mg/I mg/1 mg/l
NA NA NA NA NA NA NA NA NA
<10 .022 <10 0.443 0.038 0.249 0.031 <0.01 <5
<10 0 <10 0.323 0.077 0.629 0.045 <0.01 <5
<10 .041 <10 0.369 0.039 0.357 0.055 <0.01 <5
<10 0 <10 0.6 0.0490 0.246 NA <0.01 <5
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/I mg/l mg/l
<10 0.108 <10 0.239 0.008 0.074 0.027 <0.01 <5

<10 0 <10 0.420 0.022 0.172 0.038 <0.01 <5
<10 0 <10 <0.228 0.016 0.141 0.017 <0.01 <5
<10 0 <10 0.454 0.011 0.158 0.026 <0.01 <5
419 0 <10 7.33 0.027 0.198 NA <0.01 <5
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
<10 0 20.2 <0.0309 0.032 0.223 0.037 <0.005 13
<10 0 10.6 <0.0321 0.058 0.419 0.031 <0.01 <5
<10 0 <10 <0.0319 0.051 0.404 0.040 <0.01 <5
<10 0.078 75.6 <0.0327 0.026 0.133 NA <0.01 <5

00400 00300 TAE6C
Acute
PH D.O. Tox.
S.U. mg/1 LC50
v
5.94
7.53
8.55
00400 00300 TAA3B
Acute
PH D.O. Tox.
S.U. mg/1 LC50
6.71 pass
7.43 pass
7.31 11.15 fail
6.11 pass
7.17 pass
5.17 7.49
5.46 7.43
00400 00300 TAA3B
Acute
PH D.O. Tox.
S.U. mg/I LC50
6.56
6.95
8.89 8.07
5.87
6.70
6.57 2.45
5.31 3.94

00400 00300 TAA3B
Acute
PH D.O. Tox.
S.U. mg/1 LC50
NA NA
7.97 NA
9.1 7.3 NA
7.22 NA
9.95 NA
5.99 5.31
8.37 7.45
00400 00300 TAA3B
Acute
PH D.O. Tox.
S.U. mg/1 LC50
R;86
NA
NA
27 NA
91
00400 00300 TAA3B
Acute
PH D.O. Tox.
S.U. mg/1 LC50
6.82 NA
6.7 NA
6.31 7.27 NA
6.19 NA
7.03 NA
6.21 3.91

7.05 3.86
00400 00300 TAA3B
Acute
PH D.O. Tox.
S.U. mg/1 LC50
NA NA
8.16 NA
7.45 7.88 NA
6.98 NA
7.57 NA
5.88 3.81
6.15 1.04
00400 00300 TAA3B
Acute
PH D.O. Tox.
S.U. mg/1 LC50
6.66
7.66
7.29 13.44
6.61
6.64
7.29 5.07
7.25 4.25
00400 00300 TAA3B
Acute
PH D.O. Tox.
S.U. mg/1 LC50
m
6.54

7.28
6.96 5.39
5.56 8.46
00400 00300 TAA3B
Acute
PH D.O. Tox.
S.U. mg/1 LC50
NA NA
7.22 NA
7.74 6.58 NA
7.80 NA
7.58 NA
7.42 6.79
6.18 5.22
00400 00300 TAA3B
Acute
PH D.O. Tox.
S.U. mg/1 LC50
NA NA
7.04 pass
7.36 4.22 fail
7.10 fail
7.45 pass
7.61 3.86
5.69 4.5
00400 00300 TAA3B
Acute
PH D.O. Tox.
S.U. mg/1 LC50
NA
E NA
7.69NA

7.33 NA
7.40 NA
6.10 6.54
7.48 4.81
00400 00300 TAA3B
Acute
pH D.O. Tox.
S.U. mg/1 LC50
NA NA
6.58 NA
7.52 6.81 NA
7.31 NA
7.45 NA
7.01 2.62
6.01 2.19
00400 00300 TAA3B
Acute
pH D.O. Tox.
S.U. mg/1 LC50
NA NA
7.90 NA
8.13 5.79 NA
7.65 NA
7.65 NA
6.93 2.81
6.01 2.2
00400 00300 TAA3B
Acute
pH D.O. Tox.
S.U. mg/1 LC50
7.43 NA

NA
8.26 9.99 NA
799 NA
8.6 NA
7.35 6.49
4
5.88
00400 00300 TAA3B
Acute
pH D.O. Tox.
S.U. mg/1 LC50
8.45 NA
8.29 9.99 NA
8.64 NA
7.97 NA
8.65 4.11
5.99 9.5

ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/l mg/l mg/1 mg/l mg/l mg/1 mg/1
1-Sitar Wh NA NA NA NA NA NA NA NA
2-Lab We 1/15/2016 52.0 12 103 3.1 10.5 0.53 0.43
5 -Sitar W 1/15/2016 74.5 7 71 1.2 2.9 0.13 0.53
010 1/15/2016 39.0 1 9 71 2.2 4.9 0.18 0.51
the Hill(0 1/15/2016 116 32 126 14.9 22.5 1.71 0.44
05 Upstrea 1/15/2016
5 Downstre 1/15/2016
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphoru
Outfall mo/dd/yr mg/l mg/l mg/l mg/l mg/l mg/l mg/l
1-Sitar Wh 4/1/16 35.9 10 53 0.2 1.9 <0.02 <0.04
2-Lab We 4/1/16 19.8 4 25 0.7 1.8 <0.02 <0.04
5 -Sitar W 4/1/16 16.6 7 27 0.8 2.4 <0.02 <0.04
O10 4/12/16 8.5 6 <20 0.9 2.0 <0.02 <0.04
the Hill(0 4/1/16 11.1 8 34 1.8 4.7 <0.02 <0.04
05 Upstrea 4/1/16
5 Downstre 4/1/16
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/l mg/l mg/1 mg/l mg/l mg/l mg/l
1-Sitar Wh 6/6/16 NA NA NA NA NA NA NA
2-Lab We 6/6/16 79.6 5 53 0.8 2.6 0.39 0.23
5 -Sitar W 6/6/16 7.8 2 25 0.4 0.8 0.33 0.19
010 6/6/16 20.0 4 23 <0.2 0.6 0.16 0.16
the Hill(0 6/6/16 24.60 12.0 145.0 2.80 32.8 3.20 0.12
05 Upstrea 6/6/16
5 Downstre 6/6/16

ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/l mg/l mg/l mg/l mg/l mg/l mg/l
1-Silar Wh 8/12/16 NA NA NA NA NA NA NA
2-Lab We 8/12/16 10.0 21 103 1.48 3.4 0.52 0.10
5 -Silar W 8/12/16 17.6 14 92 1.48 2.6 0.33 0.11
010 8/12/16 NA NA NA NA NA NA NA
the Hill(0 8/12/16 12.4 29 295 49.0 59.7 14.1 0.09
05 Upstrea 8/12/16
5 Downstre 8/12/16
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/l mg/l mg/l mg/l mg/l mg/l mg/l
1-Sitar Wh 9/19/16 NA NA NA NA NA NA NA
2-Lab We 9/19/16 40.6 5 57 0.58 1.8 0.37 0.38
5 -Sitar W 9/19/16 36.0 39 145 0.58 1.9 0.35 0.33
010 9/19/16 NA NA NA NA NA NA NA
the Hill(0 9/19/16 NA NA NA NA NA NA NA
05 Upstrea 9/19/16
5 Downstre 9/19/16
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/l mg/l mg/l mg/l mg/l mg/l mg/l
1-Silar Wh 12/29/2016 72 19 110 0.27 1.5 <0.02 0.51
2-Lab We 12/29/2016 27.5 2 25 1.36 1.2 <0.02 63.2
5 -Silar W 12/29/2016 5.1 6 25 0.54 1.1 <0.02 0.85
010 12/29/2016 50 12 117 0.81 3.5 <0.02 0.85
the Hill(0 12/29/20161 28.7 56 1 892 1 215 1 213 1 0.07 1 0.57
05 Upstrea 12/29/2016

5 Downstre 12/29/201,
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/l mg/l mg/l mg/l mg/l mg/l mg/l
)I-Sitar Wh 2/15/17 19.5 27 158 4.26 7.4 0.36 0.76
2-Lab We 2/15/17 45.5 6 48 3.72 4.5 0.14 0.17
5 -Sitar W 2/15/17 7.3 3 <20 0.83 1.1 <0.02 0.15
010 2/15/17 9.1 8 29 1.33 1.6 0.05 0.11
the Hill(0 t2/15/17
114.1 26 292 23.5 104 0.11 0.11
05 Upstrea 7
5 Downstre
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/l mg/l mg/l mg/l mg/l mg/l mg/l
)I-Sitar Whse
2-Lab We 3/28/17 76 30 151 16.8 23.4 0.67 0.37
5 -Sitar W 3/28/17 44 25 126 9.97 12.3 <0.02 0.39
010
the Hill(0 t3/28/17
61 60 409 1 124 3.59 0.44
05 Upstrea
5 Downstre
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/l mg/l mg/l mg/l mg/l mg/l mg/l
)I-Sitar Whse
2-Lab We 4/13/17 14.3 16 73 8.12 10.8 0.67 0.2
5 -Sitar W 4/13/17 4.6 29 73 4.72 6.2 0.41 0.24
010 4/13/17 7.6 61 131 7.07 8.7 0.46 0.69
the Hill(0 4/13/17 7.5 20 101 8.6 18.6 8.81 0.22

05 Upstrea 4/13/17
5 Downstre 4/13/17
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphoru
Outfall mo/dd/yr mg/l mg/l mg/l mg/l mg/l mg/l mg/l
1-Sitar Wh 6/5/17
2-Lab We 6/5/17 4.2 8 43 2.5 5.3 <0.02 0.12
5 -Sitar W 6/5/17 5.4 5 41 1.9 3.7 <0.02 0.06
010 6/5/17
the Hill(0 #6/5/17
9.1 15 103 5 18 8.67 0.15
05 Upstrea
5 Downstre
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/1 mg/l mg/1 mg/l mg/1 mg/l mg/1
1-Silar Wh 11/9/2017 No flow
2-Lab We 11/9/2017 35 5 45 1.8 4.3 <0.02 0.26
5 -Silar W 11/9/2017 22.3 6 48 0.7 1.9 0.51 0.19
010 11/9/2017 27.6 8 64 0.9 2.5 0.41 0.25
0. Upstrea 11/9/2017
5 Downstre 11/9/2017

77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
NA NA NA NA NA NA NA NA NA
<10 0 <25 1.83 0.025 0.171 0.032 <0.01 <5
<10 0 <25 0.526 0.065 0.494 0.086 <0.01 <5
<10 .006 <25 1.04 0.106 0.290 0.031 <0.01 <5
<10 0 <25 2.39 0.026 0.190 NA <0.01 <5
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
<5 .034 <5 <0.0587 0.006 0.036 0.059 <0.01 <5
<5 0 <5 0.359 0.011 0.080 0.016 <0.01 <5
<5 .037 <5 0.437 0.030 0.214 0.015 <0.01 <5
<5 .044 <5 0.530 0.034 0.116 0.011 <0.01 <5
<5 .005 <5 0.858 0.013 0.069 NA <0.01 <5
Ii
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
NA NA NA NA NA NA NA NA NA
<5 0 <25 0.366 0.020 0.197 0.033 <0.01 <5
<5 .011 <25 0.086 0.021 0.128 0.010 <0.01 <5
<5 .048 <25 0.175 0.023 0.232 0.016 <0.01 <5
<5 .013 55.2 3.100 0.0150 0.103 NA <0.01 <5

77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total On-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
NA NA NA NA NA NA NA NA NA
<5 0 <5 0.560 0.028 0.100 0.016 <0.01 <5
<5 0.009 <5 0.393 0.043 0.233 0.021 <0.01 <5
NA NA NA NA NA NA NA NA NA
<5 0.009 83.3 4.86 0.045 0.157 0.046 <0.01 <5
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/1 mg/l mg/l
NA NA NA NA NA NA NA NA NA
<5 .010 <5 .210 0.025 0.174 0.028 <0.01 <5
<5 0 <5 .157 0.111 0.556 0.032 <0.01 <5
NA NA NA NA NA NA NA NA NA
NA NA NA NA NA NA NA NA NA
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
<5 0.007 <10 <0.05 0.010 0.055 0.028 <0.01 <5
<5 0 <10 0.2 0.013 0.101 0.017 <0.01 <5
<5 0 <10 0.197 0.024 0.146 0.012 <0.01 <5
<5 0 <10 0.234 0.106 1.16 <0.01 0.112 <5
7.61 0 558 13.7 0.038 0.205 NA <0.01 <5

77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
<5 0.024 <25 0.093 <0.005 0.012 0.026 <0.01 <5
<5 0 <25 0.737 0.020 0.134 0.022 <0.01 <5
<5 0 <25 0.186 0.019 0.127 0.010 <0.01 <5
<5 0.008 <25 0.327 0.010 0.160 <0.01 <0.01 <5
<5 0 97.9 9.86 0.012 0.144 NA <0.01 <5
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
<5 0 35.6 2.3 0.030 0.209 0.035 <0.01 <5
<5 0 <25 1.42 0.099 0.669 0.049 <0.01 <5
<5 0 164 7.51 0.110 0.286 NA <0.01 <5
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
<5 16 <25 1.57 0.014 0.070 0.018 <0.01 <5
<5 33 <25 1.18 0.042 0.151 0.017 <0.01 <5
<5 42 <25 2.44 0.020 0.289 0.020 <0.01 <5
<5 19 <25 1.11 0.030 0.105 NA <0.01 <5

77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/1 mg/1 mg/1 mg/1 mg/1 mg/1 mg/1 mg/1 mg/1
<5 0.029 <25 1.26 0.014 0.071 <0.01 <0.01 <5
<5 0.008 <25 0.8 0.035 0.106 0.010 <0.01 <5
<5 0.017 44.4 2.89 0.027 0.153 <0.01 <5
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/1 mg/1 mg/l mg/1 mg/1 mg/l mg/1 mg/l
<5 0 <5 <0.1 0.016 0.146 0.022 <0.01 <5
<5 0 <5 <0.01 0.039 0.292 0.02 <0.01 <5
<5 0.033 <5 <0.01 0.052 0.609 0.040 <0.01 <5

00400 00300 TAA3B
Acute
PH D.O. Tox.
S.U. mg/1 LC50
NA NA
7.81 NA
7.52 10.05 NA
7.89 NA
8.33 NA
7.41 8.22
6.10 7.81
00400 00300 TGA3B
Acute
PH D.O. Tox.
S.U. mg/1 LC50
7.55 NA
8.37 NA
7.74 6.27 NA
7.94 NA
7.74 NA
7.7 4.11
7.44 4.67
00400 00300 TAA3B
Acute
PH D.O. Tox.
S.U. mg/1 LC50
NA NA
8.43 NA
7.74 7.11 NA
7.75 NA
7.60 NA
6.94 3.94
5.08 4.04

00400 00300 TAA3B
Acute
pH D.O. Tox.
S.U. mg/1 LC50
NA NA
8.65 NA
7.62 5.99 NA
NA NA
7.72 NA
5.64 4.91
5.10 5.03
00400 00300 TAA3B
Acute
pH D.O. Tox.
S.U. mg/1 LC50
NA NA
8.09 NA
7.33 5.72 NA
NA NA
NA NA
5.45 4.90
6.10 4.11
00400 00300 TAA3B
Acute
pH D.O. Tox.
S.U. mg/1 LC50
7.72 NA
8.23 NA
7.7 4.43 NA
7.51 NA
7.05 NA
7.02 3.81

5.13 3.93
00400 00300 TAA3B
Acute
pH D.O. Tox.
S.U. mg/1 LC50
5.96 Pass
7.88 Pass
6.16 10.43 Pass
6.35 Pass
6.97 Pass
5.11 9.80
5.05 7.05
00400 00300 TAA3B
Acute
pH D.O. Tox.
S.U. mg/1 LC50
8.18
7.72 7.56
7.96
5.62 5.81
5.38 5.92
00400 00300 TAA3B
Acute
pH D.O. Tox.
s.u. mg/1 LC50
7.94
8.18 6.17
7.61
7.36

6.94 2.38
6.72 5.05
00400 00300 TAA3B
Acute
pH D.O. Tox.
S.U. mg/1 LC50
7.73
8.56 4.89
7.64
7.14 3.01
7.44 3.12
00400 00300
pH D.O.
S.U. mg/1
18.43
8.23
8.17

ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/l mg/l mg/1 mg/l mg/l mg/1 mg/1
1-Sitar Wh NA NA NA NA NA NA NA NA
2-Lab We 1/15/2016 52.0 12 103 3.1 10.5 0.53 0.43
5 -Sitar W 1/15/2016 74.5 7 71 1.2 2.9 0.13 0.53
010 1/15/2016 39.0 1 9 71 2.2 4.9 0.18 0.51
the Hill(0 1/15/2016 116 32 126 14.9 22.5 1.71 0.44
05 Upstrea 1/15/2016
5 Downstre 1/15/2016
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphoru
Outfall mo/dd/yr mg/l mg/l mg/l mg/l mg/l mg/l mg/l
1-Sitar Wh 5/25/18 21.2 8 53 2.7 1 0.71 0.36
2-Lab We 5/25/18 0 0 0 0 0 0 0
5 -Sitar W 5/25/18 50 10 74 2.1 <0.5 0.37 0.23
O10t5UJ6/25/18 10 36 2.2 1.0 0.46 0.61
05 Upstrea5 Downstre
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphoru
Outfall mo/dd/yr mg/l mg/l mg/l mg/l mg/l mg/l mg/l
1-Sitar Wh 6/20/18 0 0 0 0 0 0 0
2-Lab We 6/20/18 26.2 25 166 4.0 12.2 3.12 .28
5 -Sitar W 6/20/18 13.6 28 194 3.8 10.4 3.24 0.19
O10h6/204/180 0 0 0 0 005 Upstrea5 Downstre
ANALYTICAL RESULTS

00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphoru
Outfall mo/dd/yr mg/1 mg/1 mg/1 mg/l mg/1 mg/l mg/1
1-Sitar Wh 8/28/18 0 0 0 0 0 0 0
2-Lab We 8/28/18 144 64 561 5.9 71.9 3.38 2.39
5 -Sitar W 8/28/18 145 54 466 5.8 39.6 1.41 4.32
010t8UJ2/28/18 27 209 6.4 31.6 1.35 1.63
05 Upstrea5 Downstre
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphoru
Outfall mo/dd/yr mg/1 mg/1 mg/1 mg/1 mg/1 mg/1 mg/1
1-Sitar Wh 02HI1/19 5.4 2 40 0.5 1.7 0.13 0.3
2-Lab We 2/11/19 84 26 174 4.6 14.4 0.43 0.26
5 -Sitar W 2/11/19 40.5 14 93 3.1 7.3 0.42 0.17
010 2/11/19 22.6 <37 124 3.4 7.6 0.28 0.12
the Hill(0 2/11/19
JNA NA NAWNANA jjW
05 Upstrea /19
5 Downstre /19
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/1 mg/1 mg/1 mg/1 mg/1 mg/1 mg/1
1-Silar Wh 7/3/2019 No Flow No Flow No Flow No Flow No Flow No Flow No Flow
2-Lab We 7/3/2019 78 20 184 5.6 19.3 1.09 0.47
5 -Silar W 7/3/2019 53.3 22 159 4.7 12.8 0.79 0.32
010 7/3/2019 14.3 36 99 3.3 7.8 0.74 0.24
05 Upstrea 7/3/2019
5 Downstre 7/3/2019
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665

Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/1 mg/1 mg/l mg/l mg/1 mg/1 mg/1
1-Silar Whl 11/5/2019 No flow
2-Lab We 11/5/2019 35 5 45 1.8 4.3 <0.02 0.26
5 -Silar W 11/5/2019 22.3 6 48 0.7 1.9 0.51 0.19
010 11/5/2019 27.6 8 64 0.9 2.5 0.41 0.25
05 Upstrea 11/5/2019
5 Downstre 11/5/2019

77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
NA NA NA NA NA NA NA NA NA
<10 0 <25 1.83 0.025 0.171 0.032 <0.01 <5
<10 0 <25 0.526 0.065 0.494 0.086 <0.01 <5
<10 .006 <25 1.04 0.106 0.290 0.031 <0.01 <5
<10 0 <25 2.39 0.026 0.190 NA <0.01 <5
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
<5 0 <25 6520 0.015 0.147 0.018 <0.010 <5
0 0 0 0 0 0 0 0 0
<5 0 <25 2870 0.108 0.387 0.037 <0.010 <5
<5 0 <25 2590 0.025 0.341 0.018 <0.010 <5
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
0 0 0 0 0 0 0 0 0
<5 0 <10 1990 µ g 0.034 0.280 0.026 <0.010 <5
<5 0 <10 1270 µ g 0.098 .441 0.139 <0.010 <5
0 0 0 0 0 0 0 0 0

77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/1 mg/1 mg/1 mg/1 mg/1 mg/1 mg/l mg/1 mg/1
0 0 0 0 0 0 0 0 0
<5 0 200 <50µ g 0.114 0.586 0.063 <0.010 <5
<5 0.00264 121 <501A g 0.32 0.323 1.13 <0.01 <5
<5 0.001 1 1 72.3 <50µ g 0.085 0.936 0.038 <0.01 <5
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/1 mg/1 mg/1 mg/1 mg/1 mg/1 mg/l mg/1 mg/1
<5 0.032 <25 0.132 0.005 0.035 0.018 <0.01 <5
<5 0 <25 2.86 0.048 0.352 0.040 <0.01 <5
<5 0 <25 1.24 0.052 .416 0.025 <0.01 <5
<5 0 <25 1.61 0.029 0.486 0.033 <0.01 <5
NA NA NA NA NA NA NA NA NA
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/1 mg/1 mg/I mg/I mg/I mg/I mg/l mg/1 mg/I
No Flow No Flow No Flow No Flow No Flow No Flow No Flow No Flow No Flow
<5 27.9 2.5 0.042 0.340 0.038 <0.01 <5
<5 <25 1.9 0.073 0.520 0.037 <0.01 <5
<5 <25 1.2 0.024 0.697 0.025 <0.01 <5
77885 50060 71880 01042 01092 1 01055 01051 00556

Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
<5 j 0 j <5 <0.1 0.016 0.146 0.022 j <0.01 <5
<5 0 <5 <0.01 0.039 0.292 0.02 <0.01 <5
<5 0.033 <5 <0.01 0.052 0.609 0.040 <0.01 <5

00400 00300 TAA3B
Acute
pH D.O. Tox.
S.U. mg/1 LC50
NA NA
7.81 NA
7.52 10.05 NA
7.89 NA
8.33 NA
7.41 8.22
6.10 7.81
00400 00300 TAA3B
Acute
pH D.O. Tox.
S.U. mg/1 LC50
g
flo
go
0
0 0
00400 00300 TAA3B
Acute
pH D.O. Tox.
S.U. mg/1 LC50
0 0
8.22 0
7.98 0 0
0 0
0 0
0 0

00400 00300 TAA3B
Acute
pH D.O. Tox.
S.U. mg/1 LC50
0 0
8.39 0
8.72 0 0
8.16 0
0 0
0 0
00400 00300
pH D.O.
S.U. mg/1
7.60
8.33
8.08 NA
8.16
NA
NA NA
NA NA
00400 00300
pH D.O.
S.U. mg/1
No Flow
00400 00300

PH D.O.
S.U. mg/1
8.43
8.23
8.17

ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/1 mg/l mg/1 mg/l mg/l mg/1 mg/1
1-Silar Wh 4/30/20 0 0 0 0 0 0 0
2-Lab We 4/30/20 27.2 11 149 5 24.7 0.3 0.13
5 -Silar W 4/30/20 15.8 19 84 2.5 6.9 0.04 0.31
010 4/30/20 7.7 13 67 3.5 707 <0.02 0.06
05 Upstrea 4/30/20
5 Downstre 4/30/20
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/1 mg/l mg/1 mg/l mg/1 mg/1 mg/l
1-Silar Wh 6/25/20 0 0 0 0 0 0 0
2-Lab We 6/25/20 66 3 51 0.3 1.2 0.33 0.22
5 -Silar W 6/25/20 50.8 3 54 0.3 0.9 0.21 0.14
010 6/25/20 26.3 22 59 0.5 1.1 0.26 0.09
05 Upstrea 6/25/20
5 Downstre 6/25/20

77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
0 0 0 0 0 0 0 0 0
<5 10 µ/L 75.4 3500µ/L 0.027 0.170 0.014 <0.01 <5
<5 60 µ/L <10 810µ/L 0.036 0.243 0.018 <0.01 <5
<5 3µ/L 21.1 1400 µ/L 0.015 0.241 0.010 <0.01 <5
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
0 0 0 0 0 0 0 0 0
<5 4µ/L <25 SOµµ 0.020 0.157 0.026 <0.01 <5
<5 11 µiL <25 9%t/L 0.063 0.289 <0.01 <0.01 <5
<5 0 <25 190µ/L 0.021 0.295 <0.01 <0.01 <5

00400 00300
pH D.O.
S.U. mg/1
0
7.57
7.55
7.78
00400 00300 TAA3B
Acute
pH D.O. Tox.
S.U. mg/1 LC50
0 0
7.51 0
7.38 0 0
7.6 0
7.67 2.12
7.49 2.05

ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Date TSS BOD COD NH3 TKN NO3+NO2 tal Phospho
Outfall mo/dd/yr mg/l mg/l mg/l mg/l mg/l mg/l mg/l
-Entegris W, 5/27/22 No flow - - - - - -
2-LVM W 5/27/22 55.5 34 311 32.4 40.6 0.86 0.3
-Entegris N 5/27/22 51.9 26 170 16.5 21.6 0.49 0.29
O10 5/27/22 7.7 15 108 17 19.8 0.44 0.18
05 Upstrea 5/27/22
5 Downstre 5/27/22
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/l mg/l mg/l mg/l mg/l mg/l mg/l
-Entegris W 9/21/21 No flow - - - - - -
2-LVM W 9/21/21 73 3 41 1.1 1.6 0..1 0.14
-Entegris N 9/21/21 12.2 11 41 0.5 2.2 0.14 0.23
O10 9/21/21 7.8 22 60 1.6 2.8 0.25 0.12
05 Upstrea 9/21/21
5 Downstre 9/21/21
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total
Date TSS BOD COD NH3 TKN NO3+NO2 Phosphorus
Outfall mo/dd/yr mg/l mg/l mg/l mg/l mg/l mg/l mg/l
-Entegris W 6/2/21 No flow - - - - - -
2-LVM W 6/2/21 38 16 184 0.7 3.7 0.42 0.43
-Entegris N 6/2/21 40 17 213 0.5 1.6 0.48 0.23
010 6/2/21 12.7 73 <5 0.6 1.1 12.7 16
05 Upstrea 6/2/21
5 Downstre 6/2/21 �j
ANALYTICAL RESULTS
00530 00310 00340 00610 00625 00630 00665
Total

Date TSS BOD COD NH3 TKN NO3+NO2 Phosphoru
Outfall I mo/dd/yr mg/l mg/l mg/l mg/l mg/l mg/l mg/l
1-Sitar Wh 3/16/21 No flow - - - - - -
2-Lab We 3/16/21 57.1 13 170 2.8 2.6 1.28 0.22
5 -Sitar W 3/16/21 56.7 15 126 1.8 4.4 0.51 0.47
010 3/16/21 No Flow - - - - ow05
Upstrea 3/16/21
5 Downstre 3/16/21

77885 50060 71880 01042 01092 01055 01051 00556
Methanol TRC Hexamine ormaldehy otal Coppe Total Zinc )tal Mangan Total Lead -Polar O
mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l
<5 0.568 <5 15 0.056 0.354 0.023 <0.01 <5
<5 0 <5 5.2 0.060 0.471 0.020 <0.01 <5
<5 0.054 <5 5.2 0.021 0.121 <0.01 <0.01 <5
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/1 mg/l mg/l
<5 0 <5 0 0.006 0.060 0.017 <0.010 <5
<5 0 <5 0 0.011 0.104 0.049 <0.010 <5
<5 0 15.2 0 0.014 0.156 0.010 <0.010 <5
77885 50060 71880 01042 01092 01055 01051 00556
Total Total Total Total on-Polar
Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/1 mg/l mg/l
<5 0 <5 <50 µg/L 0.040 0.242 0.033 <0.010 <5
<5 0 <5 <250 µg/L 0.169 0.508 0.030 <0.010 <5
<5 0 <5 <50 µg/L 0.018 0.276 0.023 0<0.010 <5
77885 50060 71880 01042 01092 1 01055 01051 1 00556
Total Total Total Total on-Polar

Methanol TRC Hexamine ormaldehy Copper Zinc Manganese Lead O&G
mg/l mg/l mg/l mg/l mg/l mg/l mg/1 mg/l mg/l
<5 0 6.83 2100 Wi 0.052 0.325 0.043 <0.01 <5.0
<5 0 <5 1500µ;L 0.080 0.438 j 0.045 <0.01 <5.0

d
00300 TAA3B
D.O.mg/1N/D
N/D
00400 00300 TAA3B
Acute
pH D.O. Tox.
S.U. mg/1 LC50
19.6
4.78
5.63
00400 00300 TAA3B
Acute
pH D.O. Tox.
S.U. mg/1 LC50
8.6
9.7 5.99
8.1
7 4.28
7.14 4.22
00400 00300 1 TAA3B
Acute

pH D.O.
Tox.
S.U. mg/1 LC50
7.9
8 9.89
9.26

Outfall Date TSS BOD COD NH3 TKN
001-Silar Whse 2/21/2014
002-Lab Weir 2/21/2014 41.20 29.4 126 13.30 19.4
005 -Silar Weir 2/21/20141 19.60 1 31.3 1 115 1 6.37 10.6
010 2/21/2014
Up the Hill(004) 2/21/2014 64.50M 32.7 126.0 11.50 16
005 Upstream 2/21/2014
005 Downstream 2/21/2014
001-Silar Whse 3/25/2014 13.00 8.91 53.1 <0.100 2.42
002-Lab Weir 3/25/2014 12.20 7.68 44.3 <0.100 3.03
005 -Silar Weir 3/25/2014 8.75 13.9 57.5 <0.100 2.12
010 3/25/2014 4.50 9.66 33.2 <0.100 <1.00
Up the Hill(004) 3/25/20141 22.90 1 25.4 1 102.0 1 3.94 1 16
005 Upstream 3/25/2014
005 Downstream 3/25/2014
001-Silar Whse 4/30/2014 105.00 14.9 55.3 2.73 5.76
002-Lab Weir 4/30/2014 26.80 14.6 102 <0.100 3.64
005 -Silar Weir 4/30/2014 15.00 25.5 86.3 3.03 9.09
010 4/30/2014 27.00 121 553 2.42 5.76
Up the Hill(004) 4/30/2014 21.50 1 19.0 1 113.0 1 6.67 1 13
005 Upstream 4/30/2014
005 Downstream 4/30/2014
001-Silar Whse 5/15/2014 NA NA NA NA NA
002-Lab Weir 5/15/2014 28.8 14.0 53.3 3.33 6.97
005 -Silar Weir 5/15/2014 17.5 24.2 70.6 2.73 6.97
010 5/15/2014 7.75 >142.01 2900 3.94 7.58
Up the Hill(004) 5/15/20141 30.5 1 35.4 1 133 1 74 1 80
005 Upstream 5/15/2014
005 Downstream 5/15/2014
001-Silar Whse 7/15/2014 NA NA NA NA NA
002-Lab Weir 7/15/2014 8.75 28.0 90.5 6.67 13.3
005 -Silar Weir 7/15/2014 5.75 21.2 68.4 4.24 7.88
010 7/15/2014 12.5 96.7 162 12.4 15.8
Up the Hill(004) 7/15/20141 12.5 1 20.5 1 102 1 9.7 1 14.6
005 Upstream 7/15/2014
005 Downstream 7/15/2014
001-Silar Whse 7/28/2014 24.9 6.44 53.1 <0.100 3.33
002-Lab Weir 7/15/2014 8.75 28.0 90.5 6.67 13.3
005 -Silar Weir 7/15/2014 5.75 21.2 68.4 4.24 7.88
010 7/15/2014 12.5 96.7 162 12.4 15.8
Up the Hill(004) 7/15/20141 12.5 1 20.5 1 102 1 9.7 1 14.6
005 Upstream 7/15/2014
005 Downstream 7/15/2014
001-Silar Whse 110/15/20141 NA I NA I NA I NA I NA
002-Lab Weir 110/15/20141 16.8 1 3.01 1 21.8 1 <0.100 1 <1.00

005 -Silar Weir 10/15/20141 15.8 9.13 34.7 <0.100 <1.00
01O 10/15/20141 3.20 7.84 33.8 <0.100 71.5
Up the Hill(004) 10/15/2014 26.8 8.05 35.3 <0.100 6.09
005 Upstream 10/15/2014
005 Downstream 10/15/2014
001-Silar Whse 12/22/2014 22.1 16.6 69.7 4.22 4.22
002-Lab Weir 12/22/2014 50.0 3.96 40.1 <0.100 338
005 -Silar Weir 12/22/2014 31.0 4.89 47.3 <0.100 <1.00
01O 12/22/2014 3.50 6.87 13.6 3.75 397
Up the Hill(004) 12/22/2014 20.2 1 6.00 1 46.4 1 5.39 6.33
005 Upstream 12/22/2014
005 Downstream 12/22/2014
001-Silar Whse 1/12/2015 10.0 5.62 41.7 <0.100 3.52
002-Lab Weir 1/12/2015 35.6 5.05 39.5 <0.100 4.57
005 -Silar Weir 1/12/2015 27.2 10.5 48.1 <0.100 3.52
01O 1/12/2015 14.0 5.14 30.9 <0.100 3.17
Up the Hill(004) 1/12/2015 7.20 1 14.7 1 73.5 1 10.10 iw
005 Upstream 1/12/2015
005 Downstream 1/12/2015
001-Silar Whse 3/14/2015 NA NA NA NA NA
002-Lab Weir 3/14/2015 18.4 13.5 78.2 4.98 8.96
005 -Silar Weir 3/14/2015 20.0 9.37 30.9 <0.100 4.98
01O 3/14/2015 17.6 11.6 43.8 <0.100 6.30
Up the Hill(004) 3/14/2015 1 17.00 1 42.2 1 250.0 1 37.20 iw
005 Upstream 3/14/2015
005 Downstream 3/14/2015
001-Silar Whse 4/9/2015 NA NA NA NA NA
002-Lab Weir 4/9/2015 13.6 12.0 64.6 1.38 5.18
005 -Silar Weir 4/9/2015 17.0 14.6 102 <0.100 3.80
01O 4/9/2015 5.14 13.7 35.0 <0.100 <1.00
Up the Hill(004) 4/9/2015 1 73.00 1 29.0 1 118.0 1 <0.100 iw
005 Upstream 4/9/2015
005 Downstream 4/9/2015
001-Silar Whse 6/3/2015 3.60 5.24 45.5 <0.100 <1.00
002-Lab Weir 6/3/2015 10.0 3.56 24.7 <0.100 <1.00
005 -Silar Weir 6/3/2015 2.20 4.82 25.9 <0.100 <1.00
01O 6/3/2015 2.40 9.95 16.3 <0.100 <1.00
Up the Hill(004) 6/3/2015 1 3.60 1 6.9 1 49.9 1 <0.100 iw
005 Upstream 6/3/2015
005 Downstream 6/3/2015
001-Silar Whse 7/13/2015 NA NA NA NA NA
002-Lab Weir 7/13/2015 12.4 14 113 3.3 9.7
005 -Silar Weir 7/13/2015 11.3 18 134 3.3 8.7
01O 7/13/2015 8.7 28 109 5.6 13.0
Up the Hill(004) 7/13/2015 17.60 11.0 100.0 2.90 7.2
005 Upstream 7/13/2015

005 Downstream 7/13/2015
001-Silar Whse 8/19/2015 NA NA NA NA NA
002-Lab Weir 8/19/2015 44.0 12 132 3.7 7.7
005 -Silar Weir 8/19/2015 49.3 11 139 2.5 5.1
01O 8/19/2015 5.4 15 93 3.4 5.1
Up the Hill(004) 8/19/2015 1 61.70 1 13.0 1 155.0 1 3.10 WO005 Upstream 8/19/2015
005 Downstream 8/19/2015
001-Silar Whse 11/2/2015 175 4 57 <0.2 0.7
002-Lab Weir 11/2/2015 74.5 <2 30 <0.2 <0.5
005 -Silar Weir 11/2/2015 23.6 4 <20 <0.2 <0.5
01O 11/2/2015 10.7 4 20 0.2 <0.5
Up the Hill(004) 11/2/2015 1 53 1 40 1 500 1 1.5 iio
005 Upstream 11/2/2015
005 Downstream 11/2/2015
001-Silar Whse
002-Lab Weir 12/14/2015 102 14 94 3.7 6.1
005 -Silar Weir 12/14/2015 72.7 8 96 3.1 5.4
01O 12/14/2015 45.3 8 48 1.5 3.0
Up the Hill(004) 12/14/2015 52.3 1 22 1 182 1 38.6 58.5
005 Upstream 12/14/2015
005 Downstream 12/14/2015
001-Silar Whse NA NA NA NA NA NA
002-Lab Weir 1/15/2016 52.0 12 103 3.1 10.5
005 -Silar Weir 1/15/2016 74.5 7 71 1.2 2.9
01O 1/15/2016 39.0 9 71 2.2 4.9
Up the Hill(004) 1/15/2016 116 1 32 1 126 1 14.9 WO005 Upstream 1/15/201616 005 Downstream 1/15/20
001-Silar Whse 4/1/16 35.9 10 53 0.2 1.9
002-Lab Weir 4/1/16 19.8 4 25 0.7 1.8
005 -Silar Weir 4/1/16 16.6 7 27 0.8 2.4
01O 4/12/16 8.5 6 <20 0.9 2.0
Up the Hill(004) 4/1/16 1 11.1 1 8 1 34 1 1.8 4.7
005 Upstream 4/1/16
005 Downstream 4/1/16
001-Silar Whse 6/6/16 NA NA NA NA NA
002-Lab Weir 6/6/16 79.6 5 53 0.8 2.6
005 -Silar Weir 6/6/16 7.8 2 25 0.4 0.8
01O 6/6/16 20.0 4 23 <0.2 0.6
Up the Hill(004) 6/6/16 1 24.60 1 12.0 1 145.0 1 2.80 32.8
005 Upstream 6/6/16
005 Downstream 6/6/16
001-Silar Whse 8/12/16 NA NA NA NA NA
002-Lab Weir 8/12/16 10.0 21 103 1.48 3.4

005 -Silar Weir 8/12/16 17.6 14 92 1.48 2.6
01O 8/12/16 NA NA NA NA NA
Up the Hill(004) 8/12/16 12.4 29 295 49.0 59.7
005 Upstream 8/12/16
005 Downstream 8/12/16
001-Silar Whse 9/19/16 NA NA NA NA NA
002-Lab Weir 9/19/16 40.6 5 57 0.58 1.8
005 -Silar Weir 9/19/16 36.0 39 145 0.58 1.9
01O 9/19/16 NA NA NA NA NA
Up the Hill(004) 9/19/16 NA NA NA NA NA
005 Upstream 9/19/16
005 Downstream 9/19/16
001-Silar Whse 12/29/2016 72 19 110 0.27 1.5
002-Lab Weir 12/29/2016 27.5 2 25 1.36 1.2
005 -Silar Weir 12/29/2016 5.1 6 25 0.54 1.1
01O 12/29/2016 50 12 117 0.81 3.5
Up the Hill(004) 12/29/2016 28.7 56 892 215 iii
005 Upstream 12/29/2016
005 Downstream 12/29/2016
001-Silar Whse 2/15/17 19.5 27 158 4.26 7.4
002-Lab Weir 2/15/17 45.5 6 48 3.72 4.5
005 -Silar Weir 2/15/17 7.3 3 <20 0.83 1.1
01O 2/15/17 9.1 8 29 1.33 1.6
Up the Hill(004) 2/15/17 1 14.1 26 1 292 1 23.5 104
005 Upstream 2/15/17
005 Downstream 2/15/17
001-Silar Whse
002-Lab Weir 3/28/17 76 30 151 16.8 23.4
005 -Silar Weir 3/28/17 44 25 126 9.97 12.3
01O
Up the Hill(004) 3/28/17 1 61 1 60 1 409 1 1 124
005 Upstream 3/28/17
005 Downstream 3/28/17
001-Silar Whse
002-Lab Weir 4/13/17 14.3 16 73 8.12 10.8
005 -Silar Weir 4/13/17 4.6 29 73 4.72 6.2
01O 4/13/17 7.6 61 131 7.07 8.7
Up the Hill(004) 4/13/17 1 7.5 1 20 1 101 1 8.6 18.6
005 Upstream 4/13/17
005 Downstream 4/13/17
001-Silar Whse 6/5/17
002-Lab Weir 6/5/17 4.2 8 43 2.5 5.3
005 -Silar Weir 6/5/17 5.4 5 41 1.9 3.7
010 6/5/17
Up the Hill(004) 6/5/17 9.1 1 15 1 103 1 5 1 18
005 Upstream 6/5/17

005 Downstream 6/5/17
001-Silar Whse 11/9/2017 No flow
002-Lab Weir 11/9/2017 35 5 45 1.8 4.3
005 -Silar Weir 11/9/2017 22.3 6 48 0.7 1.9
010 11/9/2017 27.6 8 64 0.9 2.5
005 Upstream 11/9/2017
005 Downstream 11/9/2017
001-Silar Whse 5/25/18 21.2 8 53 2.7 1
002-Lab Weir 5/25/18 0 0 0 0 0
005 -Silar Weir 5/25/18 50 10 74 2.1 <0.5
01O 5/25/18 15.6 10 36 2.2 1.0
005 Upstream 5/25/18
005 Downstream 5/25/18
001-Silar Whse 6/20/18 0 0 0 0 0
002-Lab Weir 6/20/18 26.2 25 166 4.0 12.2
005 -Silar Weir 6/20/18 13.6 28 194 3.8 10.4
01O 6/20/18 0 0 0 0 0
005 Upstream 6/20/18
005 Downstream 6/20/18
001-Silar Whse 8/28/18 0 0 0 0 0
002-Lab Weir 8/28/18 144 64 561 5.9 71.9
005 -Silar Weir 8/28/18 145 54 466 5.8 39.6
01O 8/28/18 19.2 27 209 6.4 31.6
005 Upstream 8728/18
005 Downstream 8/28/18
001-Silar Whse 2/11/19 5.4 2 40 0.5 1.7
002-Lab Weir 2/11/19 84 26 174 4.6 14.4
005 -Silar Weir 2/11/19 40.5 14 93 3.1 7.3
01O 2/11/19 22.6 <37 124 3.4 7.6
Up the Hill(004) 2/11/19 NA NA NA NA NA
005 Upstream 2/11/19
005 Downstream 2/11/19
001-Silar Whse 7/3/2019 No Flow No Flow No Flow No Flow No Flow
002-Lab Weir 7/3/2019 78 20 184 5.6 19.3
005 -Silar Weir 7/3/2019 53.3 22 159 4.7 12.8
01O 7/3/2019 14.3 36 99 3.3 7.8
005 Upstream 7/3/2019
005 Downstream 7/3/2019
001-Silar Whse 11/5/2019 No flow
002-Lab Weir 11/5/2019 35 5 45 1.8 4.3
005 -Silar Weir 11/5/2019 22.3 6 48 0.7 1.9
01O 11/5/2019 27.6 8 64 0.9 2.5
005 Upstream 11/5/2019
005 Downstream 11/5/2019

001-Silar Whse 4/30/20 0 0 0 0 0
002-Lab Weir 4/30/20 27.2 11 149 5 24.7
005 -Silar Weir 4/30/20 15.8 19 84 2.5 6.9
01O 4/30/20 7.7 13 67 3.5 707
005 Upstream 4/30/20
005 Downstream 4/30/20
001-Silar Whse 6/25/20 0 0 0 0 0
002-Lab Weir 6/25/20 66 3 51 0.3 1.2
005 -Silar Weir 6/25/20 50.8 3 54 0.3 0.9
01O 6/25/20 26.3 22 59 0.5 1.1
005 Upstream 6/25/20
005 Downstream 6/25/20
001-Silar Whse 3/16/21 No flow - - - -
002-Lab Weir 3/16/21 57.1 13 170 2.8 2.6
005 -Silar Weir 3/16/21 56.7 15 126 1.8 4.4
01O 3/16/21 No Flow - - - -
005 Upstream 3/16/21
005 Downstream 3/16/21
001-Entegris Whse 6/2/21 No flow - - - -
002-LVM Weir 6/2/21 38 16 184 0.7 3.7
005 -Entegris Weir 6/2/21 40 17 213 0.5 1.6
01O 6/2/21 12.7 73 <5 0.6 1.1
005 Upstream 6/2/21
005 Downstream 6/2/21
001-Entegris Whse 9/21/21 No flow - - - -
002-LVM Weir 9/21/21 73 3 41 1.1 1.6
005 -Entegris Weir 9/21/21 12.2 11 41 0.5 2.2
01O 9/21/21 7.8 22 60 1.6 2.8
005 Upstream 9/21/21
005 Downstream 9/21/21
001-Entegris Whse 5/27/22 No flow - - - -
002-LVM Weir 5/27/22 55.5 34 311 32.4 40.6
005 -Entegris Weir 5/27/22 51.9 26 170 16.5 21.6
01O 5/27/22 7.7 15 108 17 19.8
005 Upstream 5/27/22
005 Downstream 5/27/22

NO3+NO2 TP Methanol TRC Hexamine Formaldehyde Copper Zinc
1.24 0.110 <1.0 0 24 26.100 0.03700 0.250
2.09 0.087 <1.0 0 <10 15.300 0.09600 0.3
0.63 0.18 <1 0 17.0 21.400 0.0470 0.31
1.49 0.100 <1.0 0 <10 1.280 0.00700 0.013
1.11 0.064 <1.0 0 <10 2.160 0.02200 0.166
0.661 <0.050 <1.0 0 <10 1.670 0.04900 0.521
0.801 <0.050 <1.0 0 <10 2.310 0.01600 0.214
2.34 0.16 <1.0 0 22.0 21.900 0.0230 0.192
1.08 <0.050 <1.0 0 <10 2.260 0.01300 0.1
0.951 0.120 <1.0 0.001 <10 7.620 0.03000 0.340
0.962 0.085 <1.0 0 <10 8.100 0.08300 0.53
0.826 0.150 <1.0 0 <10 7.260 0.02400 0.14
6.54 <0.050 <1.0 0 <10 11.200 0.0310 0.16
NA NA NA NA NA NA NA NA
0.502 0.11 <1.0 0 <10 7.59 0.022 0.17
0.621 0.12 <1.0 0 <10 8.21 0.10 0.76
1.77 0.14 <1.0 0.012 <10 11.8 0.045 0.39
2.56 0.21 1.6 0 11 25.8 0.042 0.20
NA NA NA NA NA NA NA NA
1.65 0.099 <1.0 0 <10 4.77 0.023 0.146
1.56 0.23 <1.0 0.013 <10 2.74 0.044 0.352
1.27 0.18 <1.0 0 <10 5.29 0.078 0.848
17.4 0.094 <1.0 0 14 6.74 0.028 0.122
0.871 0.15 <1.0 0 <10 1.66 0.026 0.0818
1.65 0.099 <1.0 0 <10 4.77 0.023 0.146
1.56 0.23 <1.0 0.013 <10 2.74 0.044 0.352
1.27 0.18 <1.0 0 <10 5.29 0.078 0.848
17.4 0.094 <1.0 0 14 6.74 0.028 0.122
NA NA NA NA NA NA NA NA
0.702 0.084 <1.0 .027 <10 1.60 0.0095 0.071

0.991 0.13 <1.0 .037 <10 2.86 0.042 0.21
0.934 0.057 <1.0 0 <10 1.46 0.017 0.26
3.02 0.13 <1.0 .022 11 7.45 0.017 0.078
1.18 1.10 <1.0 0 <10 1.54 0.0140 0.0490
0.544 1.13 <1.0 0 <10 1.45 0.0210 0.178
0.506 <0.100 <1.0 0 <10 3.58 0.0780 0.361
0.827 <0.100 <1.0 0 <10 2.07 0.0160 .237
w
.25
i <0.100 <1.0 .020 NA 7.71 0.0240 0.0960
0.651 <0.100 <1.0 .029 <10 0.505 0.0100 0.0480
0.786 0.121 <1.0 0 <10 0.590 0.0270 0.157
0.548 <0.100 7.7 0 <10 0.983 0.0450 0.332
0.824 <0.100 <1.0 .005 <10 0.484 0.0110 0.0550
2.12 <0.100 2.8 0.029 14.0 4.590 0.0220 0.08
NA NA NA NA NA NA NA NA
.439 .16 <1.0 0 13 13.6 0.0205 0.0900
0.359 0.13 <1.0 0 <10 5.49 0.0440 0.175
0.400 0.17 <1.0 .003 <10 8.51 0.0325 0.276
1.16 0.13 <1.0 0 99.0 69.3 0.0295 0.106
NA NA NA NA NA NA NA NA
2.36 0.17 <1.0 0 81.7 6.66 0.0245 0.0955
1.76 0.20 <1.0 .010 <10 4.62 0.118 0.382
2.90 0.13 <1.0 0 <10 6.88 0.0305 0.330
2.83 0.25 <1.0 0.001 16.0 16.6 0.0280 0.168
1.30 0.159 <1.0 .027 <10 0.558 0.0100 0.0360
2.57 0.095 <1.0 0 <10 2.28 0.0100 0.0750
1.71 0.128 <1.0 .014 <10 1.68 0.0380 0.120
1.61 0.099 <1.0 .011 <10 2.85 0.0170 0.194
11.50 0.117 <1.0 0.021 <10 5.4 0.0190 0.054
NA NA NA NA NA NA NA NA
0.71 0.21 <10 0.003 <10 0.575 0.026 0.104
0.54 0.78 <10 0.007 <10 0.724 0.062 0.338
1.74 0.17 <10 0.018 <10 1.21 0.060 0.583
8.54 0.19 <10 0.018 <10 0.7 0.0320 1 0.107

NA NA NA NA NA NA NA NA
0.87 0.28 <10 .022 <10 0.443 0.038 0.249
0.47 0.24 <10 0 <10 0.323 0.077 0.629
1.53 0.20 <10 .041 <10 0.369 0.039 0.357
6.19 1 0.38 <10 0 1 <10 1 0.6 1 0.0490 1 0.246
0.12 0.2 <10 0.108 <10 0.239 0.008 0.074
0.03 0.17 <10 0 <10 0.420 0.022 0.172
0.05 0.41 <10 0 <10 <0.228 0.016 0.141
0.08 0.11 <10 0 <10 0.454 0.011 0.158
w
.47
i 0.23 419 0 <10 7.33 0.027 0.198
0.42 1.31 <10 0 20.2 <0.0309 0.032 0.223
0.28 1.12 <10 0 10.6 <0.0321 0.058 0.419
0.21 1.25 <10 0 <10 <0.0319 0.051 0.404
4.05 1.33 <10 0.078 75.6 <0.0327 0.026 0.133
NA NA NA NA NA NA NA NA
0.53 0.43 <10 0 <25 1.83 0.025 0.171
0.13 0.53 <10 0 <25 0.526 0.065 0.494
0.18 0.51 <10 .006 <25 1.04 0.106 0.290
1.71 0.44 <10 0 <25 2.39 0.026 0.190
<0.02 <0.04 <5 .034 <5 <0.0587 0.006 0.036
<0.02 <0.04 <5 0 <5 0.359 0.011 0.080
<0.02 <0.04 <5 .037 <5 0.437 0.030 0.214
<0.02 <0.04 <5 .044 <5 0.530 0.034 0.116
<0.02 1 <0.04 <5 .005 <5 0.858 0.013 0.069
NA NA NA NA NA NA NA NA
0.39 0.23 <5 0 <25 0.366 0.020 0.197
0.33 0.19 <5 .011 <25 0.086 0.021 0.128
0.16 0.16 <5 .048 <25 0.175 0.023 0.232
3.20 1 0.12 <5 .013 55.2 3.100 1 0.0150 1 0.103
NA NA NA NA NA NA NA NA
0.52 0.10 <5 0 <5 0.560 0.028 0.100

0.33 0.11 <5 0.009 <5 0.393 0.043 0.233
NA NA NA NA NA NA NA NA
w
4.1
ii 0.09 <5 0.009 83.3 4.86 0.045 0.157
NA NA NA NA NA NA NA NA
0.37 0.38 <5 .010 <5 .210 0.025 0.174
0.35 0.33 <5 0 <5 .157 0.111 0.556
NA NA NA NA NA NA NA NA
NA NA NA NA NA NA NA NA
<0.02 0.51 <5 0.007 <10 <0.05 0.010 0.055
<0.02 63.2 <5 0 <10 0.2 0.013 0.101
<0.02 0.85 <5 0 <10 0.197 0.024 0.146
<0.02 0.85 <5 0 <10 0.234 0.106 1.16
0.07 0.57 7.61 0 558 13.7 0.038 0.205
0.36 0.76 <5 0.024 <25 0.093 <0.005 0.012
0.14 0.17 <5 0 <25 0.737 0.020 0.134
<0.02 0.15 <5 0 <25 0.186 0.019 0.127
0.05 0.11 <5 0.008 <25 0.327 0.010 0.160
0.11 0.11 <5 0 1 97.9 1 9.86 1 0.012 1 0.144
0.67 0.37 <5 0 35.6 2.3 0.030 0.209
<0.02 0.39 <5 0 <25 1.42 0.099 0.669
3.59 0.44 <5 0 1 164 1 7.51 1 0.110 1 0.286
0.67 0.2 <5 16 <25 1.57 0.014 0.070
0.41 0.24 <5 33 <25 1.18 0.042 0.151
0.46 0.69 <5 42 <25 2.44 0.020 0.289
8.81 0.22 <5 19 1 <25 1 1.11 1 0.030 1 0.105
<0.02 0.12 <5 0.029 <25 1.26 0.014 0.071
<0.02 0.06 <5 0.008 <25 0.8 0.035 0.106
8.67 1 0.15 <5 0.017 1 44.4 1 2.89 1 0.027 1 0.153

<0.02 0.26 <5 0 <5 <0.1 0.016 0.146
0.51 0.19 <5 0 <5 <0.01 0.039 0.292
0.41 0.25 <5 0.033 <5 <0.01 0.052 0.609
0.71 0.36 <5 0 <25 6520 0.015 0.147
0 0 0 0 0 0 0 0
0.37 0.23 <5 0 <25 2870 0.108 0.387
0.46 0.61 <5 0 <25 2590 0.025 0.341
0 0 0 0 0 0 0 0
3.12 .28 <5 0 <10 1990 µ g 0.034 0.280
3.24 0.19 <5 0 <10 1270 11 g 0.098 .441
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
3.38 2.39 <5 0 200 <50µ g 0.114 0.586
1.41 4.32 <5 0.00264 121 <50µ g 0.32 0.323
1.35 1.63 <5 0.00111 72.3 <50µ g 0.085 0.936
0
0.13 0.3 <5 0.032 <25 0.132 0.005 0.035
0.43 0.26 <5 0 <25 2.86 0.048 0.352
0.42 0.17 <5 0 <25 1.24 0.052 .416
0.28 0.12 <5 0 <25 1.61 0.029 0.486
NA NA NA NA NA NA NA NA
No Flow No Flow No Flow o HoA No Flow No Flow No Flow No Flow
1.09 0.47 <5 27.9 2.5 0.042 0.340
0.79 0.32 <5 <25 1.9 0.073 0.520
0.74 0.24 <5 <25 1.2 0.024 0.697
<0.02 0.26 <5 0 <5 <0.1 0.016 0.146
0.51 0.19 <5 0 <5 <0.01 0.039 0.292
0.41 0.25 <5 0.033 <5 <0.01 0.052 0.609

0 0 0 0 0 0 0 0
0.3 0.13 <5 10 µ/L 75.4 3500µ/L 0.027 0.170
0.04 0.31 <5 60 µ/L <10 810µ/L 0.036 0.243
<0.02 0.06 <5 3µ/L 21.1 1400 µ/L 0.015 0.241
0 0 0 0 0 0 0 0
0.33 0.22 <5 4µ/L <25 SOµµ 0.020 0.157
0.21 0.14 <5 11p/L <25 99µ/L 0.063 0.289
0.26 0.09 <5 0 <25 190µ/L 0.021 0.295
1.28 0.22 <5 0 6.83 2100 µ/L 0.052 0.325
0.51 0.47 <5 0 <5 150OWL 0.080 0.438
0.42 0.43 <5 0 <5 <50 µg/L 0.040 0.242
0.48 0.23 <5 0 <5 <250 µg/L 0.169 0.508
12.7 16 <5 0 <5 <50 µg/L 0.018 0.276
0..1 0.14 <5 0 <5 0 0.006 0.060
0.14 0.23 <5 0 <5 0 0.011 0.104
0.25 0.12 <5 0 15.2 0 0.014 0.156
0.86 0.3 <5 0.568 <5 15 0.056 0.354
0.49 0.29 <5 0 <5 5.2 0.060 0.471
0.44 0.18 <5 0.054 <5 5.2 0.021 0.121

Manganese Lead O&G pH D.O. Acute tox LC50
<0.0500 0.00219 <5.00 7.46
<0.0500 1 <0.00100 1 <5.00 1 7.4 5.94
NA 0.00347 <5 7.52
6.37 7.53
6.87 8.55
<0.0500 <0.0010 <5.00 6.71 pass
<0.0500 0.00150 <5.00 E77
pass
<0.0500 <0.0010 <5.00 11.15 fail
<0.0500 <0.0010 <5.00 pass
NA 0.00700 <5.00 pass
7.49
5.46 7.43
0.027 0.00320 <5.00 6.56
0.038 0.00360 <5.00 6.95
0.033 0.00170 <5.00 8.89
0.02 0.00200 <5.00 5.87
NA 0.00220 <5.00 6.70
.5
6
8.07
2.45
5.31 3.94
NA NA NA NA NA
0.018 0.0020 <5.00 7.97 NA
0.028 0.0016 <5.00 9.1 7.3 NA
0.048 0.0013 <5.00 7.22 NA
NA 0.0022 <5.00 9.95 NA
5.99 5.31
8.37 7.45
NA NA NA NA NA
<0.0500 0.0015 2.95 6.7 NA
<0.0500 <0.0010 1.36 6.31 7.27 NA
0.320 0.0011 1.92 6.19 NA
NA 0.0014 2mmw .22 6.21 NA
. 3.91
7.05 3.86
<L
0.0010 0.850 6.82 NA
< 0.0015 2.95 6.7 NA
< <0.0010 1.36 6.31 7.27 NA
0.0011 1.92 6.19 NA
0.0014 2.22 7.03 NA
6.21 3.91
7.05 3.86
NA NA NA NA NA
0.010 0.0014 1.02 8.16 NA

0.017 0.0025 1.42 7.45 7.88 NA
0.022 0.0051 2.28 6.98 NA
NA 0.0019 1.31 7.57 NA
5.88 3.81
6.15 1.04
0.0160 <0.00300 4.38 6.66
0.0230 <0.00300 2.80 7.66
0.0260 0.00700 2.55 7.29 13.44
0.0120 <0.00300 1.70 6.61
NA <0.00300 2.78 6.64
7.29 5.07
7.25 4.25
0.00700 <0.00300 1.09 7.27
0.0210 <0.00300 1.98 7.84
0.0240 <0.00300 1.15 7.67 6.54
0.00600 <0.00300 1.95 7.01
NA <0.00300 2.26 7.28
6.96 5.39
5.56 8.46
NA NA NA NA NA
0.0120 <0.00150 <5.00 7.22 NA
0.00500 <0.00300 <5.00 7.74 6.58 NA
0.0250 <0.00150 <5.00 7.80 NA
NA <0.00150 <5.00 7.58 NA
7.42 1 6.79
6.18 5.22
NA NA NA NA NA
0.0190 <0.00150 <5.00 7.04 pass
0.0300 0.00200 <5.00 7.36 4.22 fail
0.0205 <0.00150 <5.00 7.10 fail
NA 0.00200 <5.00 7.45 pass
7.61 1 3.96
5.69 4.5
0.00500 <0.00300 <5.00 6.86 NA
0.00900 <0.00300 6.10 8.01 NA
0.0110 <0.00300 <5.00 7.69 8.31 NA
0.0510 <0.00300 <5.00 7.33 NA
NA <0.00300 <5.00 7.40 NA
6.10 1 6.54
7.48 4.81
NA NA NA NA NA
0.019 <0.01 <5 758 NA
0.034 <0.01 <5 7.52 6.81 NA
0.128 <0.01 <5 7.31 NA
NA <0.01 <5 7.45 NA
7.01 2.62

6.01 1 2.19
NA NA NA NA NA
0.031 <0.01 <5 7.90 NA
0.045 <0.01 <5 8.13 5.79 NA
0.055 <0.01 <5 7.65 NA
NA <0.01 <5 7.65 NA
6.93 2.81
6.01 2.2
0.027 <0.01 <5 7.43 NA
0.038 <0.01 <5 8.82 NA
0.017 <0.01 <5 8.26 9.99 NA
0.026 <0.01 <5 7.99 NA
NA <0.01 <5 8.6 NA
lnnnnnnnt�357 649
39 5.88
0.037 <0.005 13 8.45 NA
0.031 <0.01 <5 8.29 9.99 NA
0.040 <0.01 <5 8.64 NA
NA <0.01 1 <5 7.97 NA
lnnnnnnnt�657 411
99 91
NA NA NA NA NA
0.032 <0.01 <5 7.81 NA
0.086 <0.01 <5 7.522NA
0.031 <0.01 <5 7.89 NA
NA <0.01 <5 8.33 NA
7.41 8.22
6.10 7.81
0.059 <0.01 <5 7.55 NA
0.016 <0.01 <5 8.37 NA
0.015 <0.01 <5 7.74 6.27 NA
0.011 <0.01 <5 7.94 NA
NA <0.01 <5 7.74 NA
7.7 1 4.11
7.44 4.67
NA NA NA NA NA
0.033 <0.01 <5 8.43 NA
0.010 <0.01 <5 7.74 7.11 NA
0.016 <0.01 <5 7.75 NA
NA <0.01 1 <5 7.60 NA
IMMMMMMMt6947 3.94
5.08 4.04
NA NA NA NA NA
0.016 1 <0.01 1 <5 1 9.65 NA

0.021 <0.01 <5 7.62 5.99 NA
NA NA NA NA NA
0.046 <0.01 <5 7.72 NA
5.64 4.91
5.10 5.03
NA NA NA NA NA
0.028 <0.01 <5 8.09 NA
0.032 <0.01 <5 7.33 5.72 NA
NA NA NA NA NA
NA NA NA NA NA
MMMMMMMMt�417 490
10 4.11
0.028 <0.01 <5 7.72 NA
0.017 <0.01 <5 8.23 NA
0.012 <0.01 <5 7.7 4.43 NA
<0.01 0.112 <5 7.51 NA
NA <0.01 <5 7.05 NA
IMMMMMMMt7027 3.81
5.13 3.93
0.026 <0.01 <5 5.96 Pass
0.022 <0.01 <5 7.88 Pass
0.010 <0.01 <5 6.16 10.43 Pass
<0.01 <0.01 <5 6.35 Pass
NA <0.01 <5 6.97 Pass
5.11 9.80
5.05 7.05
0.035 <0.01 <5 8.18
0.049 <0.01 <5 7.72 7.56
NA <0.01 <5 7.96
MMMMMMMMt�627 581
38 5.92
0.018 <0.01 <5 7.94
0.017 <0.01 <5 8.18 6.17
0.020 <0.01 <5 7.61
NA <0.01 <5 7.36
lnnnnnnnt�147 238
72 5.05
<0.01 <0.01 <5 R7.
0.010 <0.01 <5 ;3.
.89
<0.01 <5
01

7.44 3.12
0.022 <0.01 <5 8.43
0.02 <0.01 <5 8.23
0.040 <0.01 <5 8.17
0.018 <0.010 <5 7.8 0
0 0 0 0 0
0.037 <0.010 <5 8.26 0 0
0.018 <0.010 <5 8.3 0
0 0
0 0
0 0 0 0 0
0.026 <0.010 <5 8.22 0
0.139 <0.010 <5 7.98 0 0
0 0 0 0 0
0 0
0 0
0 0 0 0 0
0.063 <0.010 <5 8.39 0
1.13 <0.01 <5 8.72 0 0
0.038 <0.01 <5 8.16 0
0 0
0 0
0.018 <0.01 <5 7.60
0.040 <0.01 <5 8.33
0.025 <0.01 <5 8.08 NA
0.033 <0.01 <5 8.16
iiiiii
NA NA
NA NA
NA NA
No Flow No Flow No Flow o Flo
0.038 <0.01 <5
0.037 <0.01 <5
0.025 <0.01 <5
0.022 <0.01 <5 1430.02 <0.01 <5 0.040 <0.01 <5

0 0 0 0
0.014 <0.01 <5 7.57
0.018 <0.01 <5 7.55
0.010 <0.01 <5 7.78
0 0 0 0 0
0.026 <0.01 <5 7.51 0
<0.01 <0.01 <5 7.38 0 0
<0.01 <0.01 <5 7.6 0
7.67 2.12
7.49 2.05
0.043 <0.01 <5.0 7.9
0.045 <0.01 <5.0 8.1 8.52
7.1 9.89
7.2 9.26
0.033 <0.010 <5 8.6
0.030 <0.010 <5 9.7 5.99
0.023 0<0.010 <5 8.1
7 4.28
7.14 4.22
0.017 <0.010 <5 9
0.049 <0.010 <5 9.6
0.010 <0.010 <5 9.1
6 4.78
6.7 5.63
0.023 <0.01 <5 9.7
0.020 <0.01 <5 9.5
N/D
<0.01 <0.01 <5 9.7
N N N/D N/D

UNIVERSAL WASTE AREAS SATELLITE WASTE AREAS
1) Trailer M2 1) Silar HVM
O 2) Silar LVM
O CHEMICAL STORAGE 3 BldgE
CC O000 O 2) T3 4) Silar QC
' O CENTRAL CCUMULATION 2) 5) BUILDING A
p WINDSOCK WASTE AREA ) T4
O 50 ANK 4
O ON NK 5
ASTE TANK
ASTE TA K 2
AST E T INK 3
W J 0 EC 3
r O COOLIN A IL HEATER RO M
TOWER
O
METHANOL O NTEG STORAGE HVM
HVM 126
O Ru B 026 SCRUBBERS EVACUATION BRIDGE YOU ARE HERE
WATER OUTFALLS s
U co WIND SOCKS s
D
HE ICA Y s T311
a STORAGE ^HOT BOX CENTRALACCUMULATION PRIMARY GATHERING
zh
2 POINT T4� LVM WASTE AREA FIRE HYDRANTS s
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WINDSOCK 0 ROOM ©Q©
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0 CENTRAL ACCUMULATION
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o ANHYDROU 0
DRUM AMMONIA D-CK
STORAGE T POND CHUM CA
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4
0 LINED POND
BY � O
WHSJ� HEX MINE 0
� "
0 0 WAREHOUS ®� - Q
RESIN 0
SATELLITE WASTE 0
PLANT STORAGE REA
PO 0
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pOp BREAK AREA
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ALTERNATE GATHERING POINT INDSO K p OFFICES 0
DEPENDING ON WIND DIRECTION OR LAB o
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0
0
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EVACUATION ROUTES 2022
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0

t 'v
Table 2-1
Site Chronology
Wright Chemical Corp.Site-Riegelwood,NC
Date Description
1883 Acme Manufacturing(fertilizer and sulfuric acid production)begins operation and appears on 1899 and 1910 Sanborn Fire Insurance Maps.Lead chambers
were clearly indicated.Sulfuric acid was produced by extracting sulfate from mineral pyrite and it is believed that the waste products from the process were
disposed of on site.
2159 Alum plant began operation in same vicinity as former equalization lagoon(near current MW-16 and MW-9,prior to lagoon's existence).Alum is a double
sulfate of aluminum and potassium.
2120/1959 Wright Chemicals,Inc.was formed
1967 Wright Chemical began manufacturing hexamine
1967 Kaiser Aluminum and Chemical Corporation(Kaiser)purchased the facility located on south side of the railroad tracks from Acme Fertilizer Company.Kaiser
produced superphosphate at the facility and blended fertilizers for the local farming community.
1968 Acme and Wright Chemical merged and continued to operate the chemical plant on the north side of the railroad tracks.
Mid 1960s Wright Chemical began operation of the contact sulfuric acid plant in 1964 and began manufacturing hexamine,urea formaldehyde,and formaldehyde.
Operation of the chambers sulfuric acid plant ceased in mid-1960. Began manufacturing paraformaldehyde in 1967.
Early 197os Alum plant ceased production.Wright Chemical constructed four unlined lagoons on site(equalization basin,outfall pond,resin pond,aeration basin,and spill
basin).
6/12/1972 Wright Chemical received a non-discharge wastewater and disposal facility permit from the NC Division of Environmental Management to operate a
wastewater treatment facility consisting of an unlined equalization basin and an unlined aeration basin
1975 Three 22 It deep monitoring wells were installed around the Kaiser run-off collection pond part of non-discharge permit.Groundwater showed pH,nitrogen,
phosphorous,and potassium problems from long history and use of fertilizer acids and compounds.
10/3/1978 Wright Chemical received approval from the NC Division of Environmental Management,Groundwater Section to begin operation of the I O-acre spray field
across SR 1818.The spray field received wastewater from the aeration basin.
9/8/1981 Kaiser was issued an NPDES permit to discharge wastewater from its onsite holding pond to Livingston Creek
6/2/1983 Kaiser was issued air permit for oil-fired boilers and burners.
1 t!ll1983 NUS Corp completed site investigation of Kaiser plant doctunented to 12Y611994 report.Collected water samples from 5 wells onstte(two plant water supply
wells and three monitoring wells which surrounded a process water holding pond)and 1 private offsite well located approximately 112 mile south of plant.
1984 Kaiser ceased production and closed the fertilizer plant once the inventory was depleted.The buildings were removed from the site and the structures that
remained were concrete slab foundations and a monitoring well network.
1984 Groundwater study conducted on the former Kaiser site.Groundwater sampling revealed low-level contamination by arsenic,cadmium,copper,lead,and zinc.
Only one sample analyte(cadmium)exceeded federal health-based benchmarks.
1984 Wright Chemical installed 5 surficial observation wells on site,and subsequently installed additional wells during the NPDES permitting process,The wells
were located within the plant production areas and in spray irrigation fields to the east.The wells were monitored for pH and for several organic and non-
metallic inorganic parameters.
1984 Wright Chemical began operating the 20-ac spray field.
6/18ti984 jWright Chemical reported a 700 gallon spill of#6 fuel oil.
Page 1 of 8

Table 2-1
Site Chronology
Wright Chemical Corp.Site-Riegelwood,NC
Date Description
9/27/1984 Kaiser plant site recommended for No Further Action under CERCLA.
6/28/1985 Wright Chemical was issued an NPDES permit for discharge of boiler blowdown water to the outfall pond,which discharged to Livingston Creek,
10I2311985 Notice of Noncompliance to Wright Chemical for failure to submit monitoring data
1986 A Preliminary Assessment(PA)of Wright Chemical site was completed that recommended additional sampling of soil,sediment,surface water,and
groundwater.
3/1/1987 Wright Chemical was issued a revised non-discharge wastewater and disposal facility permit by the NC Division of Environmental Management for the unlined
ponds,10-ac spray field,and 20-ac spray field that required implementation of groundwater monitoring.
3/24/1987 Notice of Violation to Kaiser for groundwater violations including pH,total dissolved solids,total organic carbon,chloride,nitrate,nitrite,fluoride,iron,
manganese,arsenic,cadmium,and lead.
10/20/1987 Notice of Noncompliance to Wright Chemical-Discharge of process waste into Mill Creek(8000 gallons).Spill not reported until 16 days after occurrence-
fish kill reported"Violation of Permit 2361-R"
10/22/1987 Notice of Noncompliance to Wright Chemical-Constructing outlets to surface waters(4 PVC pipe discharging boiler blowdown)and(24"bypass from
equalization pond)In Violation of NCGS 143-215.1(a)(1)"
1987 Wright Corporation submits a Phase 2 Groundwater Investigation report.Report has a potentiometric map of the water table aquifer underlying the facility.
Groundwater elevations were collected from 10 temporary piezometers constructed on the Wright Chemical site and 4 permanent wells on the Kaiser facility.
1/21/1998 Fright Chemical repots that a three inch PVC pipe to the 20-acre spray field burst and discharged wastewater to Mill Creek
Mar-88 Atlanta Testing&Engineering completed a groundwater assessment at the Kaiser facility.Resulted in a Notice of Non-compliance issued on 5/2/88 for
groundwater violations of total dissolved solids,nitrate,chloride,fluoride,iron,and manganese,
6/2/1988 Kaiser submitted a plan to address groundwater issues at the former fertilizer plant
Feb-89 Kaiser completes cleanup of materials from,closed fertilizer plant that were potential groundwater contaminants.
3/1/1989 Permit No.236E-R2 issued to Wright Chemical to operate a lagoon-type wastewater treatment system followed by disposal onto the 10-acre and 20-acre waste
disposal fields expired.
3/2/1989 Wright Chemical reported 2,500-3,000 pounds of sodium hydroxide spilled on 2/12/1989
Sep-89 EPA Reg IV completed a SSI at Wright Chemical.The investigation included collection of leachate,soil,sediment and groundwater samples-Samples were
tested for organic and inorganic parameters.Surface soil at the far western edge of the original sulfuric acid plant location contained elevated arsenic,lead,and
toluene.No additional sampling was conducted in the former plant area.Soil sample collected adjacent to the newer acid plant contained elevated zinc,lead,
hexachlorobenzene,and PCB-1254.Two sediment samples collected from the acid equalization pond contained elevated lead and copper concentrations:
Nickel and vanadium were elevated in one sample,and the other sample contained DDT and methoxychlor.Sediment collected from the banks of Livingston
Creek contained numerous elevated inorganics including copper and lead and several pesticides.Groundwater in a monitoring well downgradiem from the
equalization pond contained elevated concentrations of arsenic,lead,nickel and vanadium.Based on the SSI results,the site was recommended for further
federal investigation.However it was subsequently referred to the State Inactive Hazardous Sites Program and archived under CERCLA on September 9,1989.
1211/I989 J5000 gallons of wastewater was discharged to Livingston Creek as a result of afire that occurred on 1 1/25189
Page 2 of 8

Table 2-1
Site Chronology
Wright Chemical Corp.Site-Riegelwood,NC
Date Description
12/6-8/1989 Sulfuric acid spill,2,200 gallons of 93%sulfuric acid were spilled on the railroad spur adjacent to the sulfuric acid plant,on the southern property boundary of
the Wright Corporation facility.The spill area was estimated at 300 feet long by 25 feet wide.20 tons of agricultural time was applied to the surface of the spill
area and mixed into the sail and gravel. 121711 989-10 additional tons of lime were applied to hot spots"to neutralize any acid remaining on the surface ofthe
ground.On 1 2/811 9 89 rain impeded the clean-up operations.Surface water generated from the rainfall inundated the containment area flushing the surface of
the site and discharging into Livingston Creek.Spill resulted in acidic tun-off to Livingston Creek for several days.Elevated lead and arsenic levels were
identified in un-permitted surface water discharges to Livingston Creek observed at the time by DENR.
1 2/1 111 989 Five unpermitted discharges to Livingston Creek were observed and documented during a compliance inspection at Wright Chemical.Samples from 4 ofthe
discharges were collected and analyzed.The samples were reported to contain elevated amounts of nutrients and heavy metals.Led to 111-911990 NOV.
1 2/2 811 9 89 Wright Chemical submits a report prepared by Dr.Rolf Hartung,a consultant in environmental toxicology from University of Michigan.Titled A
Reconnaissance Survey of Mill Creek and Environs"concluding that the site was not adversely impacting Mill Creek.
198911990 Sulfuric acid spills were common along the railroad tracks and in the area ofthe sulfuric acid plant.The most significant sulfuric acid spills along the railroad
track area were Wright in 1989 and Koch in 1990.
1990 The contact sulfuric acid plant was sold to Koch Sulfur.
1/5/1990& Groundwater NOV,contamination sources cited:2 acid spills,wastewater lagoons,10 acre waste disposal field,20 acre waste disposal field. 19 violations of
2/2190 2L"Groundwater standards violations.
2/13/1990 State of North Carolina completed sampling for toxicity tests of unpermitted discharges on the Wright property and Livingston Creek
2114.11990 State of North Carolina completed domestic well sampling in the vicinity of the Wright Chemical site.
207/1990 AWARE Environmental submitted a corrective action plan for unpermitted discharge violations for Wright Corporation
3/12/1990 Kaiser signed a Special Order of Consent(SOC)for groundwater violations at the former fertilizer plant,
3/14/1990 Kaiser submitted an environmental study of Livingston Creek to the Wilmington Regional Office by Dr.Rolf Hartung,a consultant in environmental
toxicology from University of Michigan.Tided"An Analysis of Environmental Impacts on Livingston Creek and Adjacent Wetlands Associated with Kaiser
Aluminum&Chemical Corporation's Retired Fertilizer Plant."
Apr-90 AWARE Environmental submitted a remedial action pian for 10-ac spray field on behalf of Wright Corporation.Four additional water table monitoring wells
were installed downgradient of the spray field.
Jun-90 AWARE Environmental submitted a remedial action plan for 12/6189 sulfuric acid spill on behalfof Wright Corporation.
7/17/1990 381 gallon formaldehyde spill occurred(solution 37%formaldehyde,62%water,and 1%methanol).Regulatory notification was not made until 7/31190.The
spill was the result of overfilling a 5,000+gallon tanker.A portion ofthe spill entered the storm sewer leading toward the lined pond(waste treatment area).
The remaining material flowed into a graveled area,down an asphalt road onto a gravel road and into graveled depression.An undetermined amount ofthe
product entered a"French Drain"leading to a ditch which discharged into Livingston Creek.Excavated material was placed onto the ground adjacent to the
aeration pond on the plant site.
8/ 111990 1600gallons of 3%ammonium hydroxide were applied to the 7117/90 formaldehyde spill,Wright was issued an NOV for this on 8113/1990.
Page 3 of 8

,
Table 2-1
Site Chronology
Wright Chemical Corp.Site-Riegelwood,NC
Date Description
811611990 DEM completed an assessment of the 7/17l90 formaldehyde spill on Livingston Creek.A benthic macroinverterbrate survey of Livingston Creek was
performed to determine any impacts to the stream fauna from the spill.It appeared that Wright Chemical was having a noticeable impact on the fauna of
Livingston Creek.The stream fauna changed from a typical swamp stream dominated by amphipods,midges and beetles upstream of the plant,to a much more
stressed ecosystem dominated by pollution tolerant oligochaetes downstream.
after 1991 Wright Chemical constructed Silar Laboratories,a subsidiary which manufactured silanes to the northeast of the sulfuric acid plants.
1/l/1991 Koch Sulfur spilled 1500-2000 gallons of sulfuric acid at the railcar loading area.The spill was neutralized using soda ash.The pH in M W-16 was raised by
pumping water from the well,mixing it with soda ash,and applying the mixture to the ground around the well.
211 YI991 Koch Sulfur documented a DIDP oil spill at the Wright Chemical hexamine plant that occurred along the railroad tracks near the sulfur line.
7/22/1991 Wastewater Treatment Ponds Closure-Revision One closure plan(for abandoning the four existing unlined lagoons)was submitted by Wright Chemical_The
closure plan consisted of three"phases"that required dewatering of the unlined lagoonswith the wastewater ultimately placed in the existing lined lagoon and
construction of the new lined lagoon(Kelly pond).
9191 Koch Sulfur ceased operation of the contact sulfuric acid plant.This was the end of sulfuric acid production at the site.
May-92 Petroleum contaminated soil was discovered near former fuel oil tanks on Kaiser property during installation of MW-4.The source was an oil-water separator
that formerly received drainage from the containment areas of the fuel oil tanks.Contaminated soil was excavated and removed in June 1992.
611711992 A release of approx.2,500 gallons of acetone was discovered.The release contaminated the sail to the southwest of a contained aboveground storage tank.The
aboveground acetone storage tank has a capacity of 10,000 gallons and is located northwest of the formaldehyde plant and just south of the methanol storage
tanks.Cleanup of the release resulted in 1500 pounds of acetone product collected in drums and contaminated soils were removed to the water table,
approximately 5 feet below grade,and placed in plastic lined steel roll off containers.
7/10/1992 Wright CEermcal submitted a corrective action plan tor the acetone spill consisting of installing a recovery system for a spring discharging acetone,installation
of one monitoring well,and groundwater monitoring of the new well and spring.NC DEM approved the plan on SM93.
7/14/1992 wser- orner prepared and submitted on behalf of aiser a proposal or p ytoreme cation ot groundwater contamination at the former Kaiser p ant using
cottonwood trees to remove excess nutrients.
1992 Use of the unlined equalization basin was phased out.The basin was located between existing wells MW-16 and MW-9 and was used to store wastewater from
the production of hexamine and sulfuric acid.
3/16/1993 138 tons of acetone contaminated soil from the acetone spill was sent offsite to a landfill
5/4/1993 Kaiser received a permit to land-farm 350 cubic yards of petroleum contaminated soil excavated from near MW-4 on 2.61 acres of the former fertilizer plant
property.
8/26/1993 Process wastewater spill
9/7/1993 Approximately 100 gallons of 50%formaldehyde solution was spilled while transferring from a tote into a tank.The hose used to transfer the formaldehyde
solution ruptured and formaldehyde spilled into the containment area around the tank and into the dirt and rocks adjacent to the containment area and the
railroad tracks.Estimated that 75%of the 100 gallons was spilled outside of containment.Soil and rocks contaminated with formaldehyde were removed from
spill site to the on-site aeration basin.Area where spill occurred had natural underground springs with water percolating up out of the soil.Water contaminated
with formaldehyde was pumped from spill site to the wastewater collection system.
Page 4 of 8

Table 2-1
Site Chronology
Wright Chemical Corp.Site-Riegelwood,NC
Date Description
1994 Under the direction of the North Carolina Department of Environment and Natural Resources(NCDENR),Division of Water Quality,Groundwater Section,
four unlined lagoons were closed.After the lagoons were drained,all of the sludge and contaminated soils were removed and placed into a lined monofilI north
ofthe maintenance building.This project was completed in 1995.
2/18/1994 A paraformaldehyde spill occurred at Wright Chemical due to a broken seal on a gasket.Approx 5,600 pounds was released.Due to cool temperatures,most of
the paraformaldehyde solidified and was scooped up.The remaining was excavated with surface soil.
7/21/1994 Black&Veatch performed a site reassessment of the Kaiser fertilizer plant that found no CERCLA eligible contamination on the property based on historical
information review.
]1/9/1994 A hexamine spill was reported by a citizen complaint that was running downhill and soaking into ground at the bottom,middle of plant.Approx 50 gallons
based on telephone conversation log.Wright Chemical responded in an 11/1 1/1994 letter it was cooling tower water from cooling tower misting.
1/4/1995 SOC amendment for close-out of the remaining un-lined pond.Wright requested permission to construct a 3rd lined lagoon(Kelly pond),
4/10/1995 was signed torunlinedpond elimination project,stormwater issues,and Tor Jormalclehy0e,nitrate,nttnte,TDS,Chromium,iron,manganese,
and sulfate in the groundwater exceeding state standards.Sources of contamination cited were the 12/6189 sulfuric acid spill,7/31/90 formaldehyde spill,
wastewater lagoons,10 acre waste disposal field,and 20 acre waste disposal field.
8/1011995 While disp5sing ot a 1000 L tank,20 gallons at wK erm(acoolant material used in process that contains_ o ip eny was released. ecte Soils
excavated and stored in empty,lined ponds.
6/23/1996 Spill of--550 gallons dichloropropene due to storage tank overfill.Spill overflowed onto gravel covered area behind Dowicil production facility.7/22196
DENR requested a monitor well installed by 9/3196 for additional sampling of dichloropropene soil area.
10/17/1996 DWQ Groundwater Section issued an NOV to Wright for violations of 8129l96 samples from MW-6,MW-9,MW-16,and Dowicil well.MW-6 and MW-9
(TDS,SO4,Total ammonia,TKN as N,Fe).M W-16(TDS,SO4,Total Ammonia,TKN as N,Nitrates).Dowicil well(cis-1-3-Dichloropropene,trans-1-3-
Dichloropropene)
1/24/1997 1 3-dichloropropene in compliance with interim standards and removed from groundwater NOV
Mar-97 Livingston Creek surface water samples were collected to determine surface water quality.Three samples were collected in the area of Wright Chemical and 4
were collected downstream of the site prior to Livingston Creek joining the Cape Fear River.Sample analyses included general water quality parameters and
did not include metals or organic chemical analyses.
Page 5 of 8

4
Table 2-1
Site Chronology
Wright Chemical Corp.Site-Riegelwood,NC
Date Description
May-97 A Groundwater Assessment(CSA)was completed for Wright Corporation by Triangle Environmental Inc.Two shaliow groundwater monitoring wells(MW-
27 and MW-28)were installed at the Wright property on 311911997.TDS was present in concentrations ranging from 138 mg/L to 23,500 mg/L.TDS plume
appeared to be centered on the Wright facility.Sulfate was present in the samples at concentrations ranging from less than detection to 17,100 mg1L.Sulfate
plume appeared to be present in the western portion of the site and extends from the railroad tracks northward to MW-9.The source of the sulfate plume had a
number of contributors including past spills along the rr tracks,the former sulfuric acid plant,the former alum plant,the former chambers plant,and seepage
from the former unlined lagoons.Ammonia was present from 103 to 2,000 mg/L.The ammonia plume was centered in the western portion of the facility
associated with M W-7,M W-8,MW-9 and MW-ACE.The source of the ammonia plume had a number of contributors including the production of fertilizer on
the Kaiser property and the former unlined lagoons on the Wright property.Nitrate was present from less than detection to 311 mg/L.The nitrate plume
appeared to be associated with the site of the former fertilizer manufacturing building located on the Kaiser property_iron was present from less than detection
to 1,500 mg/L.The iron plume appeared to be present in the western portion of the site extending from the tracks northward to MW-9.The source of the iron
plume was likely to be the former chambers plant.Analysis of 1 I surface water samples from Livingston Creek did not identify any target contaminants above
surface water quality standards.
6/16/1997 W RO-DWQ reviews CSA and responds via letter to Wright Corporation that the DWQ is in basic agreement with the subject assessment report and the
contamination appears to be delineated vertically and horizontally.The division requested additional parameters be added to their non-discharge permit
WO003361 surface water sampling program.The additional parameters were TDS,pH,ammonia,and iron.
9/5/1997 Wright submitted a corrective action plan(CAP)for sitewide groundwater by Sherrill Consulting.The principal groundwater contaminants at the site were total
dissolved solids{TDS),sulfate,ammonia,nitrate,and iron.The CAP proposed natural attenuation.
Oct-97 A fire occurred at the Fine Chemicals laboratory.Wright Chemical collected and submitted a soil sample plus upstream and downstream samples from
Livingston Creek indicating no impact from the fire.
1 1/1 511 997 Tar or jelly like material released when a disk ruptured at dryer reactor plant
Nov-Dec Three separate releases of Dowicil reported at the Dowicil facility
1997
1/2 611 99 8 The natural attenuation CAP for sitewide groundwater was approved(TDS,pH,sulfate,nitrate,iron,ammonia&TOC)
7/12/1999 Wright Chemical was issued a Title V air permit.
811 011 99 9 Rupture of a wastewater transfer line coupling causing elevated levels of ammonia in MW-26(near Kelly Pond Area)
2/4/2000 Wright Chemical was issued a renewed NPDES stormwater permit for discharge to Livingston Creek.
3/22/2000 NOV due to MW-9 sampling results contained within 10199 groundwater monitoring report
8/10/2000 Release from Wastewater Tank No.3 at the silane plant led to CAP(8/13/01)and CAP addendum(3126102)(TDS,tetrahydrofuran,3&4-methylphenol,
ammonia,&TOC)also proposing natural attenuation.
2002 Methanol release from a buned pipe leak was discovered(piping replaced).
10/13/2003 W right Chemical issued a revised NPDES stormwater permit
7004 Clam/fish tissues collected from Livingston Creek showed concentrations greater than recommended concentration ranges(lead,arsenic,cadmium,mercury,
dieldrin,Gamma-chlordane)
Page 6 of 8

Table 2-1
Site Chronology
Wright Chemical Corp.Site-Riegelwood,NC
Date Description
10/14/2004 Oak Bark Corporation was formed in North Carolina.
1 1/30/2004 Wright Chemical sold most of its assets to two officers of the company and four Wright Chemical Corporation shareholders.The new corporation began
operating as the Oak-Bark Corporation,but doing business as(dba)the Wright Corporation.Oak Bark Corporation purchased 740 acres from Wright Chemical
including the site area.
5/4/2005 Wright Chemical signed a SOC requiring correction of NPDES effluent violations.
6/1/2005 Site reassessment(SRR)recommended further action under CERCLA and the Wright Chemical Corp.site was removed from archived status.
1119C_>006 OBC received an NOV from EPA for Toxic Substances Control Act(TSCA)violations
7/17l2006 OBC was issued an Industrial User Permit to discharge wastewater to the Columbus County POTW(located on the former Kaiser fertilizer plant property)
1 113 012 00 6 Oak Bark Corp sold a portion of the site to Hexion Specialty Chemicals,Inc. Hexion purchased the Wright Corporation name and the portion of the Acme
facility that manufactures hexamine,formaldehyde and special project(ketones,formaldehyde,water treatment polymers and resins).OBC continued with their
production of silane-based products,animal feeds,specialty chemicals,and pharmaceuticals.As part of the Hexion sales agreement,OBC remained responsible
for historical environmental conditions and maintaining its reporting requirements of permits and Corrective Action Plans.
4/1012007 surlace SoH samples o. feel gs collected y in Ille area ol the lormer sullunc acict production on the -acre proposed NPL.Une
background sample was collected from nearby soils outside of the area of contamination.All 4 soils were analyzed for 22 metals,cyanide,and 21 pesticides or
pesticide degradation products.Contaminants of concern were arsenic,cadmium,copper,lead,and zinc
4/10/2007 10 sediment samples(5 background)samples taken by DENR.Only sediments immediately adjacent to the 80-acre area of contaminated soils were evaluated
for potential health effects,It was anticipated that persons would come into contact with sediments in this area while accessing the site from a boat.One
sediment sample was collected in duplicate at this location by DENR in 2007.This location was identified as the`release"area from the site into the wetlands.
The sediment was analyzed for 22 metals,cyanide,and 21 pesticides or pesticide degradation products.
5/4/2007 Name change from Wright Corporation to Oak-Bark Corporation for Permit No.WQ0005699 for the continued operation of the residuals surface disposal
facility(monofill).One 1.14-acre surface disposal unit with a total net capacity of 18,000 cubic yards;a 36-mil Hypalon 9210 bottom liner,a leachate
collection system to collect and convey leachate to use/disposal;a stormwater cover.as well as all associated piping,valves,electrical and
instrumentationtcontrol systems.and other appurtenances necessary to make a complete and functional surface disposal unit for the disposal of residuals from
the residuals source-generating facilities on an as-needed basis. The leachate collection system is operable. Water is ponded on the cover but not leaking.
OBC drained off 1700 gallons earlier in 2014. It was last drained in about 2006.
7115_ KCRA NaMphng investigation Keporl ol Hexton pecialty Chemicals,Inc.bv EPA Region IV,report issued IWJQ12UU8. or the RCRA sampling
7/16/2008 investigation,SESD collected a total of six waste samples(HA103—HA108),The regulatory levels for the Toxicity Characteristic(TC)constituents were not
exceeded for any of the samples.Vanadium was detected in all of the samples with concentrations ranging from 1.4 mglkg to 80 mglkg.The liquid sample
collected from the open drums of vanadium pentoxide contained 69 mglkg of vanadium.
7115- RCRA Sampling Investigation Report of Oak Bark Corp.by EPA Region IV,report issued I 1 f30/2008,For the RCRA sampling investigation,SESD collected
7/161200g a total of two waste samples(OB101&OB102).The regulatory levels for the Toxicity Characteristic(TC)constituents were not exceeded for any of the
samples.
3/6/2009 PermIt NO.WQ0QVJJb I given toOak-Bark Corporation for the operation o t e Kelly ponds as a closed-loop wastewater recycle act tty. his permit was
being modified to reflect the change of permit type from groundwater rernediation to closed-loop recycle system.
Page 7 of 8

Table 2-1
Site Chronology
Wright Chemical Corp.Site-Riegelwood,NC
Date Description
4/18/2009 OBC sold their silanes-based products business to MPD Holdings,Inc.On the date of the sale,MPD simultaneously put OBC's Acme silane operations into a
new corporation named Sitar,LLC.OBC owned 5%of the new Sitar,LLC corporation.Sitar,LLC leased approximately 10 acres of real estate from OBC for
its Acme operations.11 intended to purchase that real estate later that year.OBC was responsible for all past environmental conditions,
1 21912 0 09 The Secretary for the NCDENR submitted a letter to the EPA Region 4 Administrator Stating that the,State of North Carolina agreed that the Site poses a
significant threat to the public health and the environment and indicated State support of EPA's efforts to propose the Site for inclusion on the NPL. NCDENR
did not contact OBC of its decision.
3/4/2010 The EPA proposed the Wright Chemical Corporation Riegelwood,NC site to the NPL list
Feb-10 EPA released the Community Information Update fact sheet
Mar-10Documentation Record completed.
Feb-I 1 Drat Public Health Assessment prepared by NC Division of Public Health
Mar-I l Wright Chemical Corporation was added to the NPL based on an evaluation under the Hazard Ranking System(HRS)in a final rule published in the Federal
Register.HRS score of 48.03 due to only surface water overland environmental threat.Grotwdwaler,soil,and air pathways were not scored.
Noie-Includes revisions from OBC.October 2014.
Page 8 of 8

t f
4.
Table 2-2
Description of Chemical Processes
Wright Chemical Cor .Site- Riegelwood,NC
Approx. Raw Material and
Process Time Period Location Feedstock Finished Product Process Description Potential Contaminants
on Site
Former Acme/Wright Chetnicai Plant(north of railroad tracks)
Sulfuric Acid 1880s-1960s West end of Pyrite,air,water Sulfuric acid(35- Pyrite are(iron disulfide)is Sulfate,lead,iron,depressed pH,
Production(Lead property along 80%concentrated) heated in air to high temperatures other metals(from impurities in
Chamber Method) tracks to extract sulfur and form sulfur pyrite-arsenic,selenium,nickel,
dioxide.Sulfur dioxide is passed cobalt,and others,also increased
through water in lead-lined dissolution of metals in
chambers or towers(Glover groundwater from low pH)
towers)to produce sulfuric acid.
Sulfuric Acid 1964-1991 Along tracks;just Sulfur,air,vanadium Sulfuric acid(up to Sulfur is heated in air to form Sulfate,lead,vanadium,depressed
Production(Contact west of current pentoxide,sulfuric acid, 98%concentrated) sulfur dioxide.Sulfur dioxide is pH,other metals(increased
Method) hexamine plant water mixed with air in the presence of dissolution of metals in
vanadium pentoxide(catalyst)to groundwater from low pH)
create sulfur trioxide.Sulfur
trioxide is dissolved in sulfuric
acid to form oeum(fuming
sulfuric acid).Oleum is mixed
with water to form concentrated
sulfuric acid.
Alum Production 1959-1970s Along tracks; Bauxite(aluminum ore), Aluminum Alumina(aluminum oxide)is Aluminum,sulfate,potassium,
between former sulfuric acid,potassium potassium sulfate leached from bauxite using depressed pH,other metals(from
chamber and sulfate (potash alum) sulfuric acid.The leachate is then impurities in bauxite and increased
contact acid plants reacted with potassium sulfate to dissolution of metals in
form aluminum potassium groundwater from low pH)
Formaldehyde 1967-present Central pan of Methanol,air,metal or Formaldehyde(gas Methanol is mixed with air and Methanol,metals(silver,iron,
Production property,north of metal oxide catalyst or 37%aqueous the methanol rich mixture is chromium,cobalt,copper,
current hexamine solution) passed through a metal or metal molybdenum,vanadium),
plant oxide catalyst at high formaldehyde
temperature.Formaldehyde and
water vapor are produced.
Page]of 4
l

Jb
Table 2-2
Description of Chemical Processes
right Chemical Corp. Site-Rie elwood,NC
Approx. Raw Material and
Process Time Period Location Finished Product Process Description Potential Contaminants
on Site Feedstock
Hexamine l 967-present Along tracks;east Formaldehyde(50% Hexamine Formaldehyde and ammonia are Formaldehyde,ammonia,
Hexamethyl- of former acid aqueous solution), mixed in aqueous solution to hexamine,methanol,dimethylether,
netetramine) plants anhydrous ammonia, form hexamine dissolved in formic acid,DIDP
Production diisodecyl phthalate water.The water is distilled off
(DIDP) to leave solid hexamine crystals.
DIDP can be added to reduce
dusting of final product.
Aqua Ammonia 1950s-present Along tracks;cast Hexamine,sulfuric acid, Aqua Ammonia Hexamine waste is removed from Hexamine,ammonia,sulfate,
Ammonium of former acid anhydrous ammonia the hexamine plant deionizing depressed pH
Hydroxide) plants units using sulfuric acid,and
Production mixed with anhydrous ammonia-
Paraformaldehyde 1997-2007 Current dry Formaldehyde(50% Paraformal-dehyde 50%formaldehyde solution is Formaldehyde,bromide,bromine,
Production (off&on) products area solution),hvdrobromic dried in a rotary vacuum dryer, depressed pH
(former contact acid then treated with hydrobromic.
acid plant) acid and finely ground.
Aniline 2001-2002 Special projects Formaldehyde(37% Aniline 37%formaldehyde solution and Formaldehyde,aniline
Formaldehyde solution),aniline Formaldehyde aniline are mixed in a reactor.
Ketone Aldehyde 1991-201 l Special projects Acetone,urea Ketone Aldehyde Acetone,urea,and formaldehyde Acetone,urea,formaldehyde,
Resin Production (carbamide), are mixed.Sodium hydroxide is ammonia,chloride,sodium,
formaldehvde,ammonia used to adjust the pH,and elevated pH
chloride,sodium ammonia chloride is used as a
hydroxide formaldehyde scavenger.
DS-2(military 1982-1985 Special projects Diethylenetriamme, DS-2 Diethylenetriamine,Ethylene Diethylenetriamine,ethylene
decontamination ethylene glycol,ethylene glycol monomethyl ether,sodium glycol,ethylene glycol monomethv
compound) glycol monometh 1 h droxide ether,sodium,elevated pH
routw-right 1998-2008 Special projects Acrylamide, Groutwright Acrylamide and formaldehvde is Acrylamide,formaldehyde
Production formaldehyde mixed in a reactor.
owicil(Quaternium 1996-1999 Current dry 1-(3-chloroallyl)-3,5,7- Dowicil Proprietary 1-(3-chloroallyl)-3,5,7-triaza-I-
r Qua:)Production products area triaza-l- (Quatemium) azoniaadamantane chloride
(former contact azoniaadamantane (CTAC),hexamine,1,3-
acid plant) chloride,hexamine,1,3- dichlompropene,methylene
dichloropropene, chloride,sodium bicarbonate
methylene chloride,
sodium bicarbonate
Page 2 of 4
I�

i
Table 2-2
Description of Chemical Processes
Wright Chemical Cor . Site- Riegelwood,NC
Approx.
Process Time Period Location Raw Material and Finished Product Process Description Potential Contaminants
on Site Feedstock
Vanadium Oxalate 2006-2008 Special projects Oxalic acid,vanadium Vanadium oxalate Unknown Vanadium,depressed pH
Production pentoxide
Chloropicrin 1988-1991 Northern pan of Nitromethane and Chloropicrin Unknown Chloropicrin,sodium,chloride,
Production property at sodium hypochlorite nitrates,elevated pH
current silane
Sodium Metabisulfite 1993 2007 Special projects Sulfur,sodium Sodium Sulfur is heated in air to form Sulfate,sodium,elevated pH
hydroxide metabisulfite sulfur dioxide.Sulfur dioxide is
then bubbled through sodium
hydroxide solution to form
sodium bisulfate and water.The
water is distilled off to leave
solid sodium metabisulf-ite.
Urea-Formaldehyde [967-1973 Special projects Urea(carbamide), Urea-formaldehyde Urea and formaldehyde are Urea,formaldehyde,ammonia,
UF)Resins formaldehvde,ammonia, reacted under mild heat in the pyridine,elevated pH
Production pyridine presence of a base(ammonia or
pyridine)
Silanes(siloxanes 1992-present Northern pan of Silicon,hydrogen Silanes(silane, Silanes are formed by the Aluminum,copper,silanes,
Production property chloride,aluminum disiloxane, reaction of silicon with hydrogen siloxanes,chloride,hexane,
chloride(catalyst), chlorosilanes), chloride in the presence of a toluene,benzaldehyde,
copper(catalyst),hexane siloxanes catalyst.Catalyst is aluminum triethylamine(TEA),allyl amine
(solvent),toluene chloride for silane and copper for
(solvent),bervaldehyde, disiloxane and organosiianes.
triethylamine(TEA), Siloxanes are formed by
allyl amine hydrotvsis of silanes.
Cellulose Solutions 2004-2005 Special projects Cellulose,sodium Cellulose solutions Unknown Cellulose,sodium,methylene
hydroxide,methy[ene (methyl cellulose, chloride,chloroacetic acid,
chloride,chloroacetic carboxymethyl propylene oxide
acid,propylene oxide cellulose,
hydroxypropyl
cellulose)
Page 3 of 4

! 1•
Table 2-2
Description of Chemical Processes
Wright Chemical Corp.Site- Rie elwood,NC
Approx. Ram Material and
Process Time Period Location Feedstock Finished Product Process Description Potential Contaminants
on Site
rganosulfur 1990s-2009 Fine Chemical Only Lab Quantities Made
Products Production Lab
Former AcmdKaiser Fertilizer Plant(south of railroad tracks)
Normal 1880s-1983 North-central part Phosphorite(phosphate Super-phosphate Phosphate rock is finely ground Phosphate,sulfate,fluoride,
Superphosphate of property along rock)and sulfuric acid (powdered)and reacted with carbonate,depressed pH,metals
Production tracks sulfuric acid to form (from impurities in phosphorite and
superphosphate. increased dissolution to
groundwater due to low pH),
radionuclides
lG
ranular Fertilizer 1880s-1983 North-central part Muriate of potash Granular fertilizer Potassium chloride,super- Potassium,chloride,phosphorous,
Production of property along (potassium chloride), phosphate,and ammonium phosphate,ammonia,nitrate,
tracks superphosphate, nitrate were mixed with carbonate,metals.
ammonium nitrate, anhydrous ammonia to improve
anhydrous ammonia, their nitrogen content_Trace
lime,dolomite,sulfur, metals including calcium(from
iron,copper, lime),magnesium(from
molybdenum,other trace dolomite),and others were added
metals las needed to develop a specific
Note-Includes revisions from OBC.October 2014.
Page 4 of 4

Table 2-3
Documented Historical Releases
Wright Chemical Corp.Site-Riegelwood, NC
Map ID' Location Date I Description
Former Ar-Imail I Chemical'Ptant north of Mroad tracks
1 Fuel oil storage area 6118I1984 Spilled 700 2allons of#6 fuel oil inside containment area.
2 Former contact sulfuric and 1987-1990 Multiple spills of concentrated sulfuric acid and liquid sulfur documented on Wright Chemical internal spill
plant.Exact locations of spills reports.
unknown.
3 20-acre spray field[Mill Creek 9/21/1987 Line to 20-acre spray field ruptured and discharged wastewater to MITI Creek at a rate estimated by
Wright Chemical to be approx.200_gpm for 40 min.Caused fish kill that was discovered on 10/1187
4 20-acre spray field/Mill Creek 1/1 911 9 88 Line to 20-acre spray field froze and ruptured.Wastewater in the piping drained to Mill Creek.Amount
spilled was not documented.
NIA Location unknown 1 IM1988 Spilled 1,000-1,500 gallons of wastewater.Location and details unknown.
5 Former sulfuric acid railcar 1 2/611 9 89 Spilled 2,200 gallons of 93%sulfuric acid at the former sulfuric acid railcar loading area.Spill area was
loading area approx.300 feet long by 25 feet wide.Wright Chemical applied lime to neutralize the spill.The spill
impacted pH in Livingston Creek for approx.5 days.One monitoring well(MW-16)was installed at the
ill location.A remedial action plan proposing groundwater monitoring was submitted.
NIA Location unknown 3/2/1989 Spilled 2,500-3,000 pounds sodium hydroxide.Location and details unknown.
NIA Location unknown 11125/1989 Spilled 5,000 gallons wastewater as a result of a fire.Location and details unknown.
6 Formaldehyde plant tanker truck 8/1 311 9 90 Spilled 380 gallons of 37%formaldehyde solution by overfilling a tanker truck.Wright Chemical applied
loading area approx.600 gallons ammonium hydroxide to the spill to neutralize the formaldehyde to hexamine,then
applied water,The release traveled east through a french drain and discharged into a ditch leading to Mill
Creek.impacted soils were excavated.Sampling by DENR indicated that formaldehyde remained in the
soil after the excavation,and that formaldehyde impacted Mill and Livingston Creeks.Wright Chemical
disputed the DENR results contending that the laboratory's use of acid in the analyses converted
hexamine to formaldehyde.
7 Hexamine plantfformer contact 1I3111991 Spill of diisodecyl phthalate(DIDP)ail from the hexamine plant was discovered at the sulfuric acid plant.
sulfuric acid plant The oil escaped the DIDP containment area,flowed through gravel along the railroad grade,and pooled
in an area approximately 40-50 feet long by 10-15 feet wide new a french drain along the sulfur track.
8 Former sulfuric acid railcar 1/111991 Spilled 1,500 to 2,000 gallons of 99%sulfuric acid by overfilling a rail car.Koch Sulfur applied soda ash
loading area to neutralize the spill.Over the period of 1/1 -416191,Koch Sulfur attempted to raise the groundwater pH
in MW-16 by pumping the well,adding soda ash to the water,and applying the soda ashlwater mixture to
the ground around the well.
9 Acetone AST 6/1 811 9 9 2 Approx.2,500 gallons of acetone spilled from the acetone AST due to a broken sight glass and an open
containment drain valve.Wright Chemical recovered standing puddles of acetone and excavated
impacted soil to the water table.The spill dissolved two PVC cooling tower lines resulting in a release of
hexamine wastewater on 6121/92.Acetone contaminated groundwater discharged from a spring located
west of the spill.Wright Chemical installed one monitoring well at the release site(MW-ACE)and
installed a collection system at the location of the contaminated spring under a state-approved corrective
action plan.
Page 1 of 3

Table 2-3
Documented Historical Releases
Wright Chemical Corp.Site-Riegelwood,NC
Map ID' Location Date Description
11 Paraformaldehyde production 9/711993 Spilled 100 gallons of 50%formaldehyde solution.Wright Chemical estimated that 75 gallons of the spill
area was outside the containment area on gravel railroad bed.Plant personnel used water to wash down the
spill.Contaminated gravel and soil was excavated and put in the on-site aeration basin.Impacted
groundwater seeping from springs was recovered and sent to through the wastewater treatment system.
12 Hexamine plant cooling tower#4 1119/1994 Anonymous complaint reported a hexamine spill at Wright Chemical.The spill was actually cooling tower
water released from cooling tower#4 than ran from the hexamine plant toward the formaldehyde plant.
The cooling water Contained ammonia,formaldehyde,hexamine,and methanol.The released was
contained and absorbed with soil.
13 Formaldehyde plant absorber 2/16/1994 Spilled 1,127 gallons of 52%formaldehyde solution.The solution solidified and it was cleaned up as a
column solid.The area was treated with ammonium hydroxide to neutralize the formaldehyde to hexamine.
Wright Chemical estimated that 99%of the release was recovered.
14 Kelly Pond#3 71611995 Overflow of approx.200 gallons of wastewater from Kelly Pond#3.Contaminated soil still in place.
Lagoon was sandbagged for short term and Wright Chemical improved edges of holding pond to provide
mare depth.
15 Formaldehyde plant.Exact 8/10/1995 Spilled approx.20 gallons of Dowtherm coolant while removing an old tank.Impacted seits were
location unknown. excavated by Win lit Chemical and stored on-site in an empty lined impoundment.
16 Kelly Pond#2 3/11/1996 Kelly Pond#2 liner floated up due to a rip or seam failure.Unknown amount of wastewater was released.
Maintenance pumped water underneath liner back on top of the liner in order to push liner back into
lace.Wright Corporation installed a new liner.
17 Kelly Pond#3 5/1/1996 Overflow of approx.300400 gallons of rainwaterlwastewater mix from Kelly Pond#3.Occurred while
Kelly Pond#2 was being emptied for new liner installation
1B Former Dowicil plant at 6/2 311 9 9 6 Spilled approx.550 gallons of dichloropropene(DCP)due to overfilling the tank.The spill was cleaned
dichloropropene storage tank, up using absorbent material and contaminated soil was excavated and hauled off site.One temporary
Exact location unknown. monitoring("Dowicil well")well was installed and sampled.cis-1,3-DCP and trans-1,3-DCP were
detected in the well.
NIA Location unknown Aril 1997 Spilled hexamine to duck pond.Location and details are unknown.
19 Farmer Dowicil plant.Exact 11/1511997 Unreported amount of Dow dl was spilled when a rupture sprayed the material on the Dowicil building
location unknown. roof,the side of the hexamine warehouse,and the surrounding ground.Material was wiped down and
impacted soil excavated.
20 Former DowidI plant.Exact 1 21811 99 7 Spilled approx.150 gallons of Dowicil on building roof and small area of soil.Impacted soil was
location unknown. excavated.
21 Kelly Ponds 8/1 011 9 9 9 Spilled wastewater due to a ruptured transfer line cou piing.
22 Si lane plant wastewater tank#3 8/10/2000 A leak of wastewater was detected on the north side of the tank's containment.Silar cleaned and
repaired the tank.A site assessment was completing including installation of one permanent(MW-29)
and three temporary wells.A correction action plan proposing natural attenuation was prepared and
submitted.
NIA Location unknown March 2002 Spilled acetone.Location and details unknown.
Page 2 of 3

Table 2-3
Documented Historical Releases
Wright Chemical Corp.Site-Riegelwood,NC
Map ID' Location Date Description
23 South of methanol and acetone Nov.2002 A leaking underground methanol pipe was discovered between the methanol ASTs and the
ASTs formaldehyde plant.The leak was repaired and groundwater in MW-ACE and several other wells was
monitored for methanol.
24 Formaldehyde plant 311412007 27 gallons of Dowthemi was spilled inside containment at the formaldehyde plant
NIA Location unknown 9/2712007 125 gallons of 50%fomialdeh de resin was spilled behind a warehouse
25 Alimet tank 101312007 Small amount of alimet leaked outside of failed containment.The containment was repaired immediately
25 Hexamine plant 1/3012008 1,514 gallons of liquid hexamine overflowed from a sump during a rain event.
27 Hexamine tank farm 3/17/2008 20 gallons of 42%hexamine spilled inside the containment area at the hexamine tank farm
28 Railcar loading station 4123f2008 25 gallons of 42%Hexamine was spilled inside containment at railcar loading station
NIA Location unknown 511 B12008 125 gallons of 50%formaldehyde was spilled inside containment at the formaldehyde plant
29 Hexamine tank farm B1912008 5 minutes of overflow of 25%Hexamine occurred inside the containment at the hexamine tank farm
30 Special Projects plant 9/26/2008 391 pounds of 6%vanadium oxalate solution was spilled at the Special Projects loading ramp.
31 Formaldehyde plant 11/4/2008 700 gallons spilled from overflow of the"Green Tank"behind the formaldehyde plant.Estimated 200
1 gallons reached the outfall at Livingston Creek.
Former AcmelKaiser.Fertilizer Plant south of railroad tracks
10 Former fuel oil ASTs May 1992 Petroleum contaminated soil was discovered during installation of monitoring well MW-4.Approx.350
cubic yards of impacted soil were excavated in July 1992 and land Farmed on site.The source was an oil-
water separator that collected drainage from the its fuel oil ASTs containment.
Note:
' See Figure 2-5 for approximate release locations.
Page 3 of 3

Table 2-4
Summary of Historical Groundwater Data
Wright Chemical Corp.Site-Riogelwood,NC
Well Previous Sampling Parameters Historical Exceedances Other
VOC I SVOC I Metals I PesVPCB I Form.I Meth. Hex.I PH TDS TOC Amm,I Nitrate I Nitrite I Sulfate CI Phends P Gross cdo of 2L Standards or MCLa C005
"-C-Wri t Chonnical Monftrina Wells ..£; •' >mr"..
MW-1 X X X X X X X X X X X X Fe As.Cr Pb,Mn Al
MW-2 X X X X X X X X X X X X X X TDS,Sulfate,Form,Fe,Mn, At
As Cr Pp Vn
MW-3 X X X X X X X X X X Nitrate Form,Fe Mn
MW4 X X X X X X X X X X X X X X X TDS,Form,As.Cr,Fe,Pb, Hex,At
Mn,Vn,Phenol,
MW-5 X X X X X X X X X X X X X X TDS Form Fe
MW-6 X X X X X X X X X X X X X TDS,Form,Fe,Sulfate, Hex
Meth,As,Naphthalene,pH,
MW-7 X X X X X X X X X X X X X X TDS,Sulfate,Form,Meth, Hex,At
As,Cr,Fe,Pb,Mn,Vn,
Naphthalene,Benzene,
TCE H
MW-8 X X X X X X X X X X X X X TDS,Sulfate,Form,As,Fe,
Mrr,Naphthalene,Acetone,
Ma h
MW-9 X X X X X X X X X X X X X X pH,TDS,Sulfate,Form, Al
Meth,As,Cr,Cd,Cu,Fe,
Pb,Mn,W Vn,Zn,
MW-10 X X X X X X X X X X
MW-11 X X X X X X X X X X X X X X As Cr Fe Pb.Mn Hg At
MW-12 X X X X X X X X X X
MW-13 X X X X X X X X X X X TDS Nitrate.
MW-14 X X X X X X X X X X
MW-15 X X X X X X X X X X X X X X TDS,Nitrate,Cr,Fe,Mr.pH At
MW-16 X X X X X X X X X X X X pH,TDS,Sulfate,Nitrate,
As Nitrite
MW-17 X X X X X X X I X X X X X Fe
MW-18 X X X X X X X X X X X X Form Fe Mn
MW-19 X X X X X X X X X X X X Fe
MW-20 X X X X X X X X X X X X We
MW-21 X X X X X X X X X X X X TDS,Nitrate,Form,Fe,Mn At
MW-22 X X X X X X X X X X X X
MW-23 X X X X X X X
MW-25 X X X X X X X
MW-26 X X X X X X X X X X X As,Fe,Pb,pH,TDS, Al
Nitrate
MW-27 X X X X X X X X X X XRISuffate.
pH,TDS,As,Cd,Fe,Mn, AI
Nitrate
MW-28 X X X X JTDS,Fe Sulfate Nitrate
Page 1 of 2

Table 2-4
Summary of Historical Groundwater Data
Wright Chemical Corp.Site-Riegelwood,NC
Well Previous Sampling Parameters Historical Excesdances Other
VOC SVOC Metals PesVPCB Form, Meth, Hex. PH MS TOC Amm. Nitrate Nitrite Sulfate Cl Phenols P Gross alp of 21-Standards or MCLs COCs
MW-29 x X X X X x x x X X X Fe,TDS,Nitrate,Cl,THF,
Methylphenol,Phenol,
Math s
MW-30 X X pH,Fe,Sulfate,Nitrate,
TDS Pb As
MW-ACE X X X x x x x X TDS,Fe,Acetone,Meth,
(MW-24} Chioromethane,
Na hthsione
TEST X X X x X x TDS,Nitrate
WELL-1
WWMW-01 x X xI x I JTDS
WWMW-02H I I I X I I I I X I X X X X I X I I I I ISurate.Nitrate,TDS
Kaiser Mon Wells
KMW-1 I X I X I X X I X X X X I x X i x PH Fe Mri Nitrate
KMW-2 I x x X X I X X x x X X pH Fe Mn F.Nitrate P
KMW-3 I x x X X I X X X x X X TDS Fe3 Mn F P
KMWA x x x X X X X X x X X TDS,Fe,Mn,Cl.F,Nitrate, P
Sulfate Cl
KMW-5 x X X x X X x x X X X TDS,Fe,Mn,Cl,F.Nitrate, P
Sulfate CI
KMW-0 x X X x x X X x X x x TDS.Fe,F,Mn,Nitrate, P
Sulfate
KMW-7 x x X x X X x x X X X I TDS Fe F Min,Nitrate P
KMW-8 X x X X x X x X X X X TDS.Fe F Mn Nitrate P
KYW-9 x x x X X X pH.TDS,Mn Nitrate
KAC-MW-1 11411
x x X X Fe.Mn.Zn
KAC-MW-2 x x X Fe.Mn,Zn
KAC-MW-3 X x X As.Cd.Fe,Mn
KAC-PW-5 x x X As,Cd,Fe,Mn Dieldrin Para uat
KAC-PW-6 X x X Fe,Mn 1AI
Notes: Bold: Indicates a parameter that exceeds 10 times the 2L Standard or MCL
Bold Red: Indicates a paramelet that exceeds 100 times the 2L Standard or MCL
2L Standards: North Carolina Administrative Code's Title 15A,Subchapter 2L,Groundwater Oualily Standards,15.4 NCAC 2L.0202 (Effective January 1,2010)
MCL: U.S.Erwironmental Protection Agency Maximum Contaminant Levels
AI: Aluminum Farm: Formaldehyde TCE: Trichioroethene
Amm: Ammonia Hex: Hexamine TDS' Total Dissolved Solids
As: Arsenic Hg: Mercury THF: Tetrahydrofuran
Cd Cadmium Meth, Methanal Vn: Vanadium
Cl: Chloride Mn: Manganese VOC: Volatile Organic Compounds
COC: Constituent of Concern Ni: Nickel Zn. Zinc
Cr Chromium P: Phosphorous
Cu Copper Pest/PCB: PesticidestPolyrhlorinated Blphertyls
F: Fluoride Pb: Lead
Fe: Iron SVOC. Semivolatile Organic Compounds
Pape 2 02

Table 3-1
Potential Contaminant Source Areas
Wright Chemical Corp.Site-Riegetwood,NC
Potential
Source Area
Descri ion Potential Contaminants Supporting Documentation Reference
Former'Acme i ht Ctiemleaf Plant north of railroad backs)' .:
W-1 Former lead chamber Sulfate,lead,iron,low pH, 1883 and 1910 Sanborn maps showing the location of the former lead chambers;magenta
sulfuric acid plant.Used other metals(from impurities in colored soil and denuded floodplain(Expanded Site Inspection[ESI),NCDENR,200a and
lead-lined chambers and pyrite-arsenic,selenium, multiple historical reports);elevated lead and arsenic concentrations in MW-30(CAP
towers to produce sulfuric nickel,Cobalt,and others,also Monitoring Report 2nd Event 2010,Sherrill Environmental,201%elevated arsenic,sulfate
acid from pyrite.Also increased dissolution of metals concentrations plus low pH in MW-9,MW-27,and MW-30(CAP Monitoring Report 2nd
included associated in groundwater from low pH), Event 2010,Sherrill Environmental,2010 and multiple previous reports),elevated metals
denuded floodplain area. pesticides and pesticides concentrations in 2007 ESI soil samples(ESI,NCDENR,2008);elevated
metals and pesticides concentrations in 1989 Site Screening Investigation]SSI)surface soil
location WC-SS-02 and sediment location WC-SD-09(SSI Report,NUS Corp.,1989).
W-2 Former alum plant and Aluminum,sulfate,potassium, 1967 topographic survey of Wright Chemical showing alum plant location;1973 map of
equalization pond(co- lead,hexamine,formaldehyde, Kaiser drainage structures showing discharge to the Wright Chemical equalization pond;
located).Alum plant ammonia,nitrate,fluoride, 1987 Wright Chemical topographic survey showing pond locations; 1989 Wright Chemical
produced alum from other metals,low pH, topographic survey showing pond locations;elevated arsenic,sulfate,and TDS
bauxite,sulfuric acid,and pesticides,petroleum,other concentrations in MW-9(CAP Monitoring Report 2nd Event 2010,Sherrill Environmental,
potassium sulfate. unidentified organics, 2010 and multiple previous reports);elevated metals in 1989 SSI groundwater sample WC-
Equalization pond received radionuclides MW-07[from MW-9]plus elevated metals,organics,and pesticides in sediment samples
process waste from the WC-SD-07 and WC-SD-08[from equalization pond](SSI Report,NUS Corp.,1989).
contact sulfuric acid plant,
drainage from the Kaiser
fertilizer plant,and runoff
from the hexamine plant.
W-3 Former open ditch and Aluminum,sulfate,potassium, 1967 topographic survey of Wright Chemical showing ditch and discharge from alum plant
outfall that conveyed lead,ammonia,nitrate, to ditch via 8"pipe,1973 map of Kaiser drainage structures,1984 Kaiser Investigation
discharge from former fluoride,phosphate, Report Figure 2(Kaiser Agricultural Chemical Investigation Report,NUS Corp., 1984);
sulfuric acid plants,alum phosphorous,other metals,low elevated metals,pesticides,and radionuclides in 2007 ESI sediment samples WC-003-SD
plant,and fertilizer plant to pH,pesticides,petroleum, and WC-013-SD(ESI,NCDENR,2008).
Livingston Creek(prior to radionuclides
Construction ofponds)
Page 1 of 6

Table 3-1
Potential Contaminant Source Areas
Wright Chemical Corp.Site-Riegelwood,NC
Potential
Source Area
ID Description Potential Contaminants Supporting Documentation Reference
W-4 Former outfall pond. Hexamine,formaldehyde, 1987 Wright Chemical topographic survey showing pond locations,1989 Wright Chemical
Received boiler blowdown, ammonia,methanol,metals, topographic survey showing pond locations,volatile organics and metals in 1989 SSI
cooling tower biowdown, other volatile and semivolatile sediment sample WC-SD-06[from outfall pond](SSI Report,NUS Corp.,1989).
and water softener organics,sulfate
backwash from all onsite
operations and discharged
to Livingston Creek.
W-5 Former sulfuric acid railcar Low pH,sulfate,sodium, 1987-1990 Wright Chemical spilt reports;Remedial Action Plan for December 1989
loading area.Location of carbonate,metals from Sulfuric Acid Spill(Aware Environmental,1990);Koch 1991 sulfuric acid spill
multiple sulfuric acid spills increased groundwater documentation and cleanup efforts;low pH in MW-27,elevated sulfate in MW-27 and MW-
including large spills in dissolution due to low pH 16,elevated arsenic in MW-16 and MW-27(CAP Monitoring Report 2nd Event 2010,
1989 and 1991. Sherrill Environmental,2010 and multiple previous reports).
W-0 Former contact sulfuric acid Sulfur,sulfate,vanadium, 1967 Wright Chemical topographic survey showing the sulfuric acid plant;1987-1990
plant/former Dowicil sodium,carbonate,metals,low Wright Chemical spill reports;1987 Wright Chemical sulfuric acid plant layout,metals,
plant/current dry products pH,bromine,bromide,Dowicil VOCs,SVOCs,and PCBs detected in 1989 SSI surface soil sample WC-SS-03[from acid
plant(co-iocated).Location (gautemium or quat),1,3- plant](SSI Report,NUS Corp.,1989); 1990 Koch survey and maps of the sulfuric acid
of former sulfuric acid dichloropropene,methylene plant; 1995 Wright Chemical dichloropropene spill documentation[including soil sample
production using vanadium chloride,formaldehyde, results and"Dowidl Well"results];1997 Wright Chemical Dowidl release records[2 spills]
pentoxide catalyst,1997 hexamine,volatile and (2011 Wright Chemical Corp.response to EPA information request).
spills of Dowial,and semivolatile organics,PCBs
paraformaldehyde
production
W-7 Hexamine plant.Production Formaldehyde,ammonia, 1967 Wright Chemical topographic survey showing the hexamine plant with wooden
of hexamine from hexamine,methanol, formaldehyde tanks and a steel methanol tank;1991 Koch letter to Wright Chemical
formaldehyde and dimethylether,formic acid, documenting a DIDP oil spill in the hexamine plant that also impacted the sulfuric acid plant;
ammonia- diisodecyl phthalate(DIDP) 1993 spill of 50%formaldehyde solution(Wright Chemical spill report to NCDENR);1994
Wright Chemical letter documenting a spill from the 44 cooling tower; 1997 hexamine spill
to duck pond("Environmental Matters'section of 2006 Oak Bark to Hexion asset purchase
agreement);2008 sump overflow spill of 1514 gatlons liquid hexamine(DENR records);
20D7 and 2008 spills of 42%hexamine at tank farm and railcar loading area(DENR
records).
Page 2 of 6

Table 3-1
Potential Contaminant Source Areas
Wright Chemical Corp.Site-Riegelwood, NC
Potential
Source Area
ID Description Potential Contaminants Supp6rting Documentation Reference
W-8 Fuel oil storage area.One Polynuclear aromatic 1984 hand written note in DENR file documenting 700 gallon spill of#6 fuel oil;1993 Wright
9.000 gallon capacity#6 hydrocarbons(PAHs) Chemical hand drawn facility map indicating location of fuel oil tank.
fuel oil tank.
W-9 Formaldehyde plant. Methanol,metals(silver,iron, 1988-1990 Wright Chemical groundwater monitoring summary table showing elevated
Production of formaldehyde chromium,cobalt,copper, formaldehyde concentrations in MW-6 and MW-8;1989 SSI soil sample WC-SS-07(from
from methanol using metal molybdenum, vanadium), formaldehyde plant)that detected high concentrations of unidentified organic compounds;
or metal oxide catalysts. formaldehyde,ethylene glycol, 1990 NCDENR enforcement report for formaldehyde spill;1993 NCDENR and Wright
ammonia Chemical formaldehyde spill documentation; 1994 NCDENR and Wright Chemical
formaldehyde spill documentation; 1995 Wright Chemical and NCDENR Dowthemr spill
documentation;2000 formaldehyde spill("Environmental Matters'section of 2006 Oak Bark
to Hexion asset purchase agreement).
W-10 Former resin pond. Metals,organics,pesticides, 1988-1990 Wright Chemical groundwater monitoring summary table showing elevated
Received resin waste and sulfate,nitrates,ammonia, TDS,TOC,ammonia,sulfate,and formaldehyde concentrations in MW-8;1989 SSI
stormwater runoff from the chloride-This area received sediment samples WC-SD-04 and WC-SD-05(from resin pond)that detected high
facility. runoff from most of the site so concentrations of tentatively identified and unidentified organic compounds,elevated iron,
a wide range of potential sulfate,ammonia,TDS,and TOC in MW-8(CAP Monitoring Report 2nd Event 2010,Sherrill
contaminants is expected. Environmental,2010 and multiple previous reports).
W-11 Lined wastewater pond and Formaldehyde,hexamine, 1988-1990 Wright Chemical groundwater monitoring summary table showing elevated
wastewater tanks. metals,organics,pesticides, TDS,TOC,ammonia,sulfate,methanol,formaldehyde,and hexamine concentrations in
Received wastewater from sulfate,nitrates,ammonia, MW-7;elevated iron,sulfate,ammonia,TDS,and TOC in MW-7(CAP Monitoring Report
processes Conducted at the chloride.This pond received 2nd Event 2010,Sherrill Environmental,2010 and multiple previous reports);2009 Hexion
facility since pond wastewater from most letter to Oak-Bark Corp asserting that Oak-Bark disposed of unpermitted solid wastes in the
construction in the 1980s. processes conducted at the pond including molybdenum catalyst,resin batches,and contaminated soil;elevated metals
site since the 1980s,so a wide and unidentified organics in 1989 ESI sediment sample WC-SD-11(from Mill Creek near
range of potential contaminants pond and wastewater tanks).
is expected.
W-12 Methanol and Acetone Methanol,acetone,ethylene 1992 Wright Chemical acetone spill documentation and corrective action plan;historically
ASTs glycol elevated acetone and methanol concentrations in MW-ACE;2002 acetone spill reference in
"Environmental Matters"section of 2006 Oak Bark to Hexion asset purchase agreement;
2002 methanol pipe leak and subsequent 2003-2006 annual methanol groundwater
monitoring documented by Shemll Environmental.
Page 3 of 6

Table 3-1
Potential Contaminant Source Areas
Wright Chemical Corp.Site-Riegelwood,NC
Potential
Source Area
ID Description Potential Contaminants Supporting Documentation Reference
W-13 Siiane plant/Former Chloropicrin,sodium,chloride, 1988-1990 Wright Chemical groundwater monitonng summary table showing elevated
chloropicrin plant nitrates,aluminum,copper, TDS,TOC,ammonia,formaldehyde,and hexamine concentrations in MW-6; 1998 Wright
sitanes,siloxanes,hexane, Chemical fine chemical laboratory fire sampling showing low-level volatile organics in the
toluene,benzaldehyde, drainage pathway east of the plant;2001 corrective action plan and subsequent monitoring
Idethylamine(TEA),allyl reports for the release from wastewater tank#3 indicating elevated TDS.TOC,sulfate,
amine,acetic acid,acetate, chloride,coliform,tetrahydrofuran,methylphenol,phenol,methanol,and acetic acid in MW-
metals(from acetate salts), 29;elevated iron,sulfate,ammonia,TDS,and TOC in MW-8(CAP Monitoring Report 2nd
tetrahydrofuran(THF) Event 2010,Sherrill Environmental,2010 and multiple previous reports).
W-14 Former aeration pond and Metals,organics,pesticides, 1988-1990 Wright Chemical groundwater monitoring summary table showing elevated
spill basin formaldehyde,methanol, TDS,TOC,ammonia,formaldehyde,and hexamine concentrations in MW-4;1989 SSI
hexamine, Sulfate,nitrates, groundwater sample WC-MW-06[from MW4]indicating elevated aluminum,arsenic,iron,
ammonia,chloride.This pond lead,potassium,sodium,vanadium,zinc,phenol,tentatively identified organics,and
received wastewater from the unidentified organics.
hexamine plant and also water
from the equalization basin and
the resin pond,so a wide range
of potential contaminants is
expected.
W-15 Monofill Metals,organics,pesticides, According to the"Environmental Matters"section of the 2006 Oak-Bark to Hexion asset
formaldehyde,methanol, purchase agreement,the monofilt contains"the scrapings of several formerly unlined
hexamine,sulfate,nitrates, wastewater ponds containing approximately 750,000 gallons of hexamine waste water and
ammonia,chloride approximately 15,O00 cubic yards of muck/scrapings from the bottom of said unlined
radionuclides.This unit ponds."
received sludge from all of the
former unlined ponds when
they were closed in the 1990s
so a wide range of potential
contaminants is expected..
W-16 Former laboratory sink Metals,organics, 2000 NCDENR compliance inspection report that described a laboratory sink used by
discharge formaldehyde,methanol, chemists to wash glassware that discharged to ground surface behind the lab.
hexamine,sulfate,nitrates,
ammonia,chloride.
Page 4 of 6

Table 3-4
Potential Contaminant Source Areas
Wright Chemical Corp.Site-Riegelwood, NC
Potential
Source Area
10 Description Potential Contaminants Supporting Documentation Reference
W-17 Former 10-acre spray field Metals,organics,pesticides, 1988-1990 Wright Chemical groundwater monitoring summary table showing elevated
formaldehyde,methanol, TDS,ammonia,nitrate,sulfate,and formaldehyde concentrations in MW-2 and MW-3;1989
hexamine,sulfate,nitrates, SSl groundwater sample WC-MW-04(from MW-21 indicating elevated metals and
ammonia,chloride.This spray unidentified organics and sediment sample WC-SD-12[from pond in spray field]indicating
fie3d received wastewater from tentatively identified/unidentified organics and pesticides; 1990 remedial action plan for the
the aeration basin,so a wide 10-acre spray field indicating elevated levels of formaldehyde,ammonia,iron,manganese,
range of potential contaminants sulfate and nitrate downgradient of the spray field.
is expected.
W-18 Former 20-acre spray field Metals,organics,pesticides, 1988-1990 Wright Chemical groundwater monitoring summary table showing elevated
formaldehyde,methanol, TDS and nitrate in spray field monitoring wells; 1987 and 1988 Wright Chemical
hexamine,sulfate,nitrates, documentation of wastewater spills due to piping to the 20-acre spray field;1989 SSt
ammonia,chloride.This spray groundwater sample WC-MW-02[from MW-111 and WC-MW-03(from MW-15]indicating
field received wastewater from elevated metals and surface soil sample WC-SS-09[from 20-acre spray field]indicating
the aeration basin,so a wide high levels of unidentified organic compounds;
range of potential contaminants
is expected.
W-19 Kelly ponds Metals,organics,pesticides, 2000 NCDENR NOV listing low pH and elevated ammonia in Kelly pond wells MW-22,MW-
formaldehyde,methanol, 25,and MW-26;2000 NCDENR and Wright Chemical letters referencing a wastewater spill
hexamine,sulfate,nitrates, at the Kelly pond area in August 1999;1996 Kelly Pond#2 liner leak, 1995 and 1996 Kelly
ammonia chloride. Pond#3 overflows.
W-20 Wastewater spills to Mill Metals,organics,pesticides, 1987 Wright Chemical and NCDENR documentation of an 8,000-galton wastewater spill to
Creek formaldehyde,methanol, Mili Creek;1988 Wright Chemical and NCDENR documentation of a wastewater spill to Mill
hexamine,sulfate,nitrates, Creek.
ammonia chloride.
Page 5 of 6

Table 3-1
Potential Contaminant Source Areas
Wright Chemical Corp.Site-Riegelwood, NC
Potential
Source Area
Descri ion Potential Contaminants Supp2rting Documentation Reference
Former AcmelKatser Fortiitzer Plant south of railroad tracks
K-1 Former fertilizer plant Phosphorous,phosphate, 1997 Kaiser groundwater monitoring report and previous reports indicating elevated Tp5,
production area sulfate,fluoride,carbonate, chloride,fluoride,ammonia,nitrate,potassium,sulfate,and phosphorous in MW-4,MW-4S,
depressed pH,metals(from MW-5,and MW-5&
impurities in phosphorite),
radionuclides,potassium,
chloride,ammonia,nitrate,
carbonate.
K-2 Petroleum contaminated Petroleum constituents 1992 Atlanta Testing 8 Engineering report documenting excavation of petroleum impacted
soil near MW-4 soils
K-3 Drainage pathways, Phosphorous,phosphate, 1984 NUS site investigation that detected metals,dieldrin,and paraquat in former
retention pond,and outfall sulfate,fluoride,carbonate, monitoring welts near the pond; 1989 Atlanta Testing 8 Engineering pond sediment
to Mill Creek depressed pH,metals(from samples indicating elevated metals,TKN,ammonia,TOC,sulfate,and phosphate and MW-
impurities in phosphorite), 6 groundwater sample indicating slightly elevated fluoride,TKN,ammonia,sulfate,and
radionuclides,potassium, potassium;1992 groundwater monitoring report indicating elevated nitrate,TDS,fluoride,
chloride,ammonia,nitrate, iron,and manganese in MW-6; 1997 groundwater monitoring report indicating elevated
carbonate. nitrate TDS fluoride.sulfate,and manganese in MW-6.
Page 6 of 6

7/13/22,8:59 AM North Carolina Secretary of State Search Results
• File an Annual Report/Amend an Annual Report • Upload a PDF Filing • Order a Document Online -
Add Entity to My Email Notification List • View Filings • Print a Pre-Populated Annual Report form • Print
an Amended a Annual Report form
Business Corporation
Legal Name
Entegris, Inc.
Information
Sosld: 0812235
Status: Current-Active O
Date Formed: 11/9/2005
Citizenship: Foreign
State of Incorporation: DE
Fiscal Month: December
Annual Report Due Date: April 15th
CurrentgnnuaL Report Status:
Registered Agent: Corporation Service Company
Addresses
Mailing Principal Office
129 Concord Road, Building #2 129 Concord Road, Building #2
Billerica, MA 01821-4600 Billerica, MA 01821-4600
Reg Office Reg Mailing
2626 Glenwood Avenue, Suite 550 2626 Glenwood Avenue, Suite 550
Raleigh, NC 27608 Raleigh, NC 27608
Officers
Secretary Treasurer President
Joseph Colella Gregory B. Graves Bertrand Loy
129 Concord Road 129 Concord Road 129 Concord Road
Billerica MA 01821 Billerica MA 01821 Billerica MA 01821
https://www.sosnc.gov/online_services/search/Business_Registration_ResuIts 1/2

7/13/22,8:59 AM North Carolina Secretary of State Search Results
Stock
hftps://www.sosnc.gov/onIine_services/search/Business_Registration_ResuIts 2/2

SILAR
LABORATORIES
August 13, 2015 RF!CE1` F[)
SW Individual Permit Coverage Renewal a06 z s 2015
Storm Water Permitting Program DENR-LAND QUA;ITy
1612 Mail Service Center �CRI1'JViATEgpERf 44i1yNG
Raleigh,North Carolina 27699-1612
Re: Request for Permit Renewal
To Whom It May Concern:
Enclosed is Silar LLC's Storm Water permit renewal application packet. There are two copies of each of the
required documents. If you have any questions, please contact me.
Best Regards,
Brandon Sproles
Environmental Safety and Health Manager
Silar Laboratories
333 Neils Eddy Road
Riegelwood, NC 28456
p(910)-655-4212 ext.101
f(910-655-8201)
[e-mail]
�F'�
300 N. 3rd Street • Suite 120 •Wilmington, NC 28401 E:::::7 (p): 910.762.5800 • (f): 910.228.5033 •www.silar.com
Silar LLC 333 Neils Eddy Road, Riegelwood, North Carolina 28456 (910)-655-6980

Permit Coverage
AAF-IWRenewal Application Form a�c.
NCDENR National Pollutant Discharge Elimination System NPDIES Permit Number
Stormwater Individual Permit NCS000533
Please provide your permit number in box in the upper right hand corner, complete the information in the space provided
below and return the completed renewal form along with the required supplemental information to the address indicated.
Owner Information * Address to which permit correspondence will be mailed
Owner/Organization Name: Silar, LLC
Owner Contact: Brandon Sproles
Mailing Address: 333 Neils Eddy Road Riegelwood, NC 28456
Phone Number: 910-655-4212
Fax Number: 910-655-8201
E-mail address: [e-mail] { �
Facility Information RECEI V,
Facility Name: Silar LLC
Facility Physical Address: 333 Neils Eddy Road Riegelwood, NC 28456 _1 9 2015
Facility Contact: Brandon S roles � ..l_!R-1;.Ah1D��1,?j ,
Mailing Address: 333 Neils Eddy Road, Riegelwood, NC 28456 �' '+ .+ :i �7, !"
Phone Number: 910-655-4212
Fax Number: 910-655-4212
E-mail address: [e-mail]
Permit Information
Permit Contact: Brandon S roles
Mailing Address: 333 Neils Eddy Road Riegelwood, NC 28456
Phone Number: 910-655-4212
Fax Number: 910-655-8201
E-mail address: bs [e-mail]
Discharge Information
Receiving Stream: Livingston Creek(Broadwater Lake)
Stream Class: C
Basin: Sw Stream in the Cape Fear River Basin
Sub-Basin: N/A
Number of Outfalls: 4
Facility/Activity Changes Please describe below any changes to your facility or activities since issuance of your permit. Attached a
separate sheet if necessary.
There have been no changes to our facility since the last permit issuance.
CERTIFICATION
I certify that I am familiar with the:' forma ' n contained in the application and that to the best of my knowledge and belief
such information is tru , compl and a urate.
Signature - Z Date _ ~ /� `l
:Er�0 Q00 ,��Y__l-tit a / C /f -z4
Print or type name of person signing above Title
Please return this completed application form SW Individual Permit Coverage Renewal
and requested supplemental information to: Stormwater Permitting Program
1612 Mail Service Center
Raleigh, North Carolina 27699-1612

SUPPLEMENTAL INFORMATION REQUIRED FOR RENEWAL OF INDIVIDUAL
NPDES STORMWATER PERMIT
Two copies of each of the following shall accompany this submittal in order for the application
to be considered complete:
(Do not submit the site Stormwater Pollution Prevention Plan)
itials
1. A current Site Map from the Stormwater Pollution Prevention Plan. The location of
industrial activities(including storage of materials, disposal areas, process areas and
loading and unloading areas),drainage structures, drainage areas for each outfall,
building locations and impervious surfaces should be clearly noted.
2v--A summary of Analytical Monitoring results during the term of the existing permit
(if your permit required analytical sampling). Do not submit individual lab reports.
The summary can consist of a table including such items as outfall number,
f parameters sampled, lab results, date sampled,and storm event data.
6s3. A summary of the Visual Monitoring results. Do not submit individual monitoring
reports. The summary can consist of a table including such items as outfall number,
parameters surveyed,observations, and date monitoring conducted.
L4. As'ummary of the Best Management Practices utilized at the permitted facility.
Summary should consist of a short narrative description of each BMP's in place at
the facility. If the implementation of any BMP's is planned, please include
information on these BMP's.
5. A short narrative describing any significant changes in industrial activities at the
permitted facility. Significant changes could include the addition or deletion of
work processes,changes in material handling practices, changes in material storage
practices, and/or changes in the raw materials used by the facility.
6. Certification of the development and implementation of a Stormwater Pollution
Prevention Plan for the permitted facility (Sign and return attached form).
If the final year analytical monitoring of the existing permit term has not been completed
prior to filing the renewal submittal,then the last years monitoring results should be submitted
within 30 days of receipt of the laboratory reports. (i.e.do not withhold renewal submittal
waiting on lab results)

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Silar,LLC Quarterly Inspection
Stormwater Discharge Outfall Qualitative Monitoring Report
This inspection is performed quarterly during a representative rain event.
Inspector(s):
Date of Inspection:
Rainfall Amount:
Discharge Characteristic Outfall 4001 Outfall#002 Outfall#005
Silar Warehouse Fine Chemicals Silar
Color(Describe the color of the discharge using basic
colors—red,brown,blue, etc.—and tint—light,
medium,dark-as descriptors)
Odor(Describe any distinct odors that the discharge
may have—smells strongly of oil,weak chlorine odor,
etc.)
Clarity (Choose the number which best describes the
clarity of the discharge where 1 is clear and 10 is very
cloudy)
Floating Solids(Choose the number which best
describes the amount of floating solids in the
stormwater discharge where I is no solids and 10 is
the surface covered with floating solids)
Suspended Solids(Choose the number which best
describes the amount of suspended solids in the
stormwater discharge where l is no solids and 10 is
extremely muddy)
Foam(Is there any foam in the stormwater Yes No Yes No Yes No
discharge?)
Oil Sheen(Is there an oil sheen in the stormwater Yes No Yes No Yes No
discharge?)
Deposition at Outfall(Is there disposition of material Yes No Yes No Yes No
—sediment, etc.—at or immediately below the
outfall?
Erosion at Outfall(Is there erosion at or immediately Yes No Yes No Yes No
below the outfall?
Housekeeping Is there trash at the outfall?) Yes No Yes No Yes No
General Conditions of System Structure and Shear Yes No Yes No Yes No
Gate Valves Is the equipment in good condition?
Other Obvious Indicators of Stormwater Pollution Yes No Yes No Yes No
If atypical conditions are noted investigate and document suspected cause of condition and any actions taken in
response. List these items below.
Note: Low clarity,high solids,and/or presence of foam,oil sheen,deposition or erosion may be indicative of
conditions that warrant further investigation and corrective action.

2015 Quarterly Visual Monitoring Results
DATE: 03-14-201S ( 151 Quarter)
Color NO FLOW Light Medium Light
Odor None None None
Clarity 2 3 2
Floating Solids 1 1 1
Suspended Solids 2 3 2
Foam None None None
Oil Sheen No No No
Deposition at outfall No No No
Erosion at outfall No No No
Housekeeping(Trash) Yes No No
General Conditions of system Good Good Good
structure and shear gate valves
Other obvious indicators of None None None
stormwater pollution
DATE: 04-09-2015 (2"d Quarter)
Color NO FLOW Light Light Brown Light
Odor ! No No No
Clarity 2 3 1
Floating Solids Pollen Pollen Pollen
Suspended Solids 1 2 1
Foam None No None
Oil Sheen No No No
Deposition at outfall No No No
Erosion at outfall No Yes No
Housekeeping(Trash) No Yes No
General Conditions of system Good Good Good
structure and shear gate valves
Other obvious indicators of None None None
stormwater pollution

2015 Quarterly Visual Monitoring Results
DATE: 07-13-2015 (3" Quarter)
Color No Flow Light Brown Dark Brown Very Light Brown
Odor No No No
Clarity 3 4 2
Floating Solids 1 1 1
Suspended Solids 1 1 1
Foam None None None
Oil Sheen No No No
Deposition at outfall No No No
Erosion at outfall No No No
Housekeeping (Trash) Yes No Yes
General Conditions of system Good Good Good
structure and shear gate valves
Other obvious indicators of None None None
stormwater pollution

2014 Quarterly Visual Monitoring Results
DATE: 02-21-2014 ( I" Quarter)
DiscVarge -Char—act—eAWOF— Outfall#66"I� Outfall #002Outfall #005Outfall#010
Color NO FLOW Light Grey Light Grey NO FLOW
Odor None None
Clarity 3 4
Floating Solids 2 3
Suspended Solids 2 3
Foam None Yes
Oil Sheen No No
Deposition at outfall No No
Erosion at outfall No No
Housekeeping (Trash) No Yes
General Conditions of system Good Good
structure and shear gate valves
Other obvious indicators of None None
stormwater pollution
DATE: 05-15-2014 (2"d Quarter)
Discharge Characteristics Outfall#001 Outfall #0021 1 Outfall#010
Color No Flow None Light Grey None
Odor No No No
Clarity 2 3 1
Floating Solids 1 1 1
Suspended Solids 2 2 1
Foam None None None
Oil Sheen No No No
Deposition at outfall No No No
Erosion at outfall No No No
Housekeeping(Trash) No Yes No
General Conditions of system Good Good Good
structure and shear gate valves
Other obvious indicators of None None None
stormwater pollution

2014 Quarterly Visual Monitoring Results
DATE: 07-15-2014(3`d Quarter)
Discharge Characteristics Outfall#001 •utfall#00200 #010
Color No Flow Clear Clear Clear
Odor No No No
Clarity 2 2 2
Floating Solids 1 1 1
Suspended Solids 1 1 1
Foam None None None
Oil Sheen No No No
Deposition at outfall No No No
Erosion at outfall No No No
Housekeeping(Trash) Yes No Yes
General Conditions of system Good Good Good
structure and shear gate valves
Other obvious indicators of None None None
stormwater pollution
DATE: 11-26-2013 (4th Quarter)
r Outfall#00100 butfall#OOSOutfail#010
Color No Flow Light Grey Clear Clear
Odor No No No
Clarity 4 3 2
Floating Solids 2 2 2
Suspended Solids 3 1 1
Foam None Yes None
Oil Sheen No No No
Deposition at outfall No No No
Erosion at outfall No No No
Housekeeping (Trash) Yes No Yes
General Conditions of system Good Good Good
structure and shear gate valves
Other obvious indicators of None None None
stormwater pollution

2013 Quarterly Visual Monitoring Results
DATE: 02-07-2013 ( 15`Quarter)
Color NO FLOW Grey Grey Clear
Odor None None None
Clarity 5 5 1
Floating Solids 2 2 1
Suspended Solids 5 5 1
Foam None Yes None
Oil Sheen No No No
Deposition at outfall No No No
Erosion at outfall No No No
Housekeeping(Trash) No Yes No
General Conditions of system Good Good Good
structure and shear gate valves
Other obvious indicators of None None None
stormwater pollution
DATE: 05-23-2013 (2"d Quarter)
Color Light Grey None light Grey None
Odor No No No No
Clarity 4 2 4 2
Floating Solids 2 1 2 1
Suspended Solids 4 2 4 2
Foam None None Yes None
Oil Sheen No No No No
Deposition at outfall No No No No
Erosion at outfall No No No No
Housekeeping(Trash) No No Yes No
General Conditions of system Good Good Good Good
structure and shear gate valves
Other obvious indicators of None None None None
stormwater pollution

2013 Quarterly Visual Monitoring Results
DATE: 09-16-2013 (3" Quarter)
Color Light Light Light Light
Odor No No No No
Clarity 1 2 1 1
Floating Solids 1 1 1 1
Suspended Solids 1 2 1 1
Foam None None None None
Oil Sheen No No No No
Deposition at outfall No No No No
Erosion at outfall No No No No
Housekeeping (Trash) No Yes No Yes
General Conditions of system Good Good Good Good
structure and shear gate valves
Other obvious indicators of None None None None
stormwater pollution
DATE: 11-26-2013 (41'Quarter)
Color Light Brown Light Brown Grey Light Grey
Odor No No No No
Clarity 4 5 5 3
Floating Solids 1 1 2 1
Suspended Solids 4 5 5 3
Foam None None None None
Oil Sheen No No No No
Deposition at outfall No No No No
Erosion at outfall No No No No
Housekeeping (Trash) No No No No
General Conditions of system Good Good Good Good
structure and shear gate valves
Other obvious indicators of None None None None
stormwater pollution

2012 Quarterly Visual Monitoring Results
DATE: 03-03-2012 ( 15Y Quarter)
Color Clear Light Grey Light Grey Clear
Odor None None None None
Clarity 1 2 2 1
Floating Solids 1 1 1 1
Suspended Solids 2 1 1 1
Foam None None Yes None
Oil Sheen No No No No
Deposition at outfall No No No No
Erosion at outfall No No No No
Housekeeping (Trash) No No No No
General Conditions of system Good Good Good Good
structure and shear gate valves
Other obvious indicators of None None None None
stormwater pollution
DATE: 05-09-2012 (2 Id Quarter)
Discharge Characteristics Outfall#001 Outfall #002Outfes,
Color NO FLOW Light Grey Light Grey Clear
Odor None None None
Clarity 2 2 1
Floating Solids 1 1 1
Suspended Solids 2 2 1
Foam Yes Yes None
Oil Sheen No No No
Deposition at outfall No No No
Erosion at outfall No No No
Housekeeping (Trash) No No No
General Conditions of system Good Good Good
structure and shear gate valves
Other obvious indicators of None None None
stormwater pollution

2012 Quarterly Visual Monitoring Results
DATE: 08-19-2012 (3`0 Quarter)
Color NO FLOW Clear Clear Clear
Odor None None None
Clarity 3 3 1
Floating Solids 1 1 1
Suspended Solids 1 2 1
Foam No No No
Oil Sheen No No No
Deposition at outfall No No No
Erosion at outfall No No No
Housekeeping(Trash) No No No
General Conditions of system Good Good Good
structure and shear gate valves
Other obvious indicators of !None None None
stormwater pollution
DATE: 12-12-2012 (41"Quarter)
Color NO FLOW Light Grey Light Grey Clear
Odor None None None
Clarity 3 3 1
Floating Solids 2 2 1
Suspended Solids 3 3 2
Foam None None None
Oil Sheen No No No
Deposition at outfall No No No
Erosion at outfall No No No
Housekeeping (Trash) No No No
General Conditions of system Good Good Good
structure and shear gate valves
Other obvious indicators of None None None
stormwater pollution

2011 Quarterly Visual Monitoring Results
DATE: 02-25-2011 ( 1"Quarter)
Discharge Characteristics------7 Outfall #002Outfall #005Outfall#010
Color Ok OK OK N/A
Odor Ok Ok Ok N/A
Clarity Ok Ok Ok N/A
Floating Solids None None None N/A
Suspended Solids None None None N/A
Foam No Yes None N/A
Oil Sheen No No No N/A
Deposition at outfall No No No N/A
Erosion at outfall No No No N/A
Housekeeping(Trash) No No No N/A
General Conditions of system Good Good Good N/A
structure and shear gate valves
Other obvious indicators of None None None N/A
stormwater pollution
DATE: 06-23-2011 (2"d Quarter)
Discharge Characteristics Outfall#001Outfall#002Outfall#005Outfall #010
Color Light Some Dirt-Light OK N/A
Odor N/A N/A N/A N/A
Clarity 1 3 3 N/A
Floating Solids 1 1 1 N/A
Suspended Solids 2 2 2 N/A
Foam No No None N/A
Oil Sheen No No No N/A
Deposition at outfall No No No N/A
Erosion at outfall No No No N/A
Housekeeping(Trash) No No No N/A
General Conditions of system Good Good Good N/A
structure and shear gate valves
Other obvious indicators of None None None N/A
stormwater pollution

2011 Quarterly Visual Monitoring Results
DATE: 09-20-11 (P Quarter)
Color Muddy Brown sight Light N/A
Odor N/A N/A N/A N/A
Clarity 7 2 2 N/A
Floating Solids 1 1 1 N/A
Suspended Solids 7- Muddy 2 2 N/A
Foam No No None N/A
Oil Sheen No No No N/A
Deposition at outfall No No No N/A
Erosion at outfall No No No N/A
Housekeeping (Trash) No No No N/A
General Conditions of system Good Good Good N/A
structure and shear gate valves
Other obvious indicators of None None None N/A
stormwater pollution
DATE: 11-29-2011 (4" Quarter)
Color Brown Clear Clear N/A
Odor NONE NONE NONE N/A
Clarity 3 1 1 N/A
Floating Solids 1 1 1 N/A
Suspended Solids 3 2 2 N/A
Foam No no None N/A
Oil Sheen No No No N/A
Deposition at outfall No No No N/A
Erosion at outfall No No No N/A
Housekeeping(Trash) No No No N/A
General Conditions of system Good Good Good N/A
structure and shear gate valves
Other obvious indicators of None None None N/A
stormwater pollution

BEST MANAGEMENT PRACTICES (BMPs) Completed by: Brandon Sproles
Title: EH&S Manager
IDENTIFICATION Date: JA.NUARY ,2015
Instructions: Describe the Best Management Practices that you have selected to include in your plan. For each of the baseline BMPs,
describe actions that will be incorporated into facility operations. Also, describe any additional BMPs(activity-specific
and site-specific)that you have selected.
BMPs Brief Description of Activities
Good Housekeeping Storage of chemicals to minimize contact with storm water(under cover&on pallets); maintain clean working
areas; minimize waste accumulation. Weekly housekeeping checklist
Preventative Daily inspections of Hazardous Waste storage tanks and containments, Weekly inspection of 90-day storage areas
Maintenance and containments. Checklist maintained in binder
Inspection Quarterly qualitative inspection of stormwater outfall. Weekly visual inspections to identify any potential problems
that may cause storm water contamination(e.g., leaks/cracks in dikes)Checklist in SWP3 folder.
Spill Prevention and Educate employee on proper handling of chemicals; inform employees about MSDS information and reporting
Response procedures for any spill/leak incident; maintain a readily available supply of spill prevention kit materials(e.g.,
absorbent materials).
Sediment and Erosion Re-grade and seed the facility property as necessary to minimize erosion. Construction zones which involving land
Control disturbance should be reseeded.
Management of Build curbing to direct storm water around processing areas. Looking at construction improvements to buildings
Runoff when possible
Additional BMPs Checklist maintained for secondary containment. Drain valves are kept locked. Stormwater is tested and logged
(Activity-and Site- prior to release. If any contamination is found, it is pumped to wastewater tanks for off-site disposal.
Specific)

BILAR
LABORATORIES
August 12, 2015
Division of Energy, Minerals,
& Land Resources
ATTN: Central Files
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: Changes to facility report
To Whom It May Concern:
There have been no significant changes to the plant site since the last permit issuance. All
operations are proceeding as normal.
If you have any questions regarding this submittal, l can be contacted at [phone] x101 or
[e-mail].
Regards,
l
Brandon Sproles
Environmental Health and Safety
Silar Laboratories
p(910)-6554212 ext.101
f(910-655-8201)
[e-mail]
L
300 N. 3rd Street - Suite 120 -Wilmington, NC 28401 �� (p):910,762.5800 - (f),910.228.5033 -www.silar.com

STORMWATER POLLUTION PREVENTION PLAN
DEVELOPMENT AND IMPLEMENTATION
CERTIFICATION
North Carolina Division of Energy, Mineral, and Land Resources -Stormwater Permitting
Facility Name: Silar Laboratories
Permit Number: NCS000533
Location Address: 333 Neils Eddy Road
Riegelwood, NC 28456
County: Columbus
"I certify, under penalty of law, that the Stormwater Pollution Prevention Plan (SPPP) document and all attachments were
developed and implemented under my direction or supervision in accordance with a system designed to assure that
qualified personnel properly gather and evaluate the information required by the SPPP. Based on my inquiry of the
person or persons who manage the system, or those persons directly responsible for gathering the information, the
information gathered is, to the best of my knowledge and belief, true, accurate and complete."
And
I certify that the SPPP has been developed, signed and retained at the named facility location, and the SPPP has been
fully implemented at this facility location in accordance with the terms and conditions of the stormwater discharge
permit."
And
"I am aware that there are significant penalties for falsifying information, including the possibility of fines and
imprisonment for knowing violations."
Sign (according to permit signatory requirements) and return this Certification. DO NOT
SEND STORMWATER POLLUTION PREVENTION PLAN WITH THIS CERTIFICATION.
Signature Date
L �1 Im a-L— d&/7 c -A�
Print or type name of person signing above Title
SPPP Certification 10/13

STORMWATER DISCHARGE OUTFALL (SDO)
ANNUAL SUMMARY DATA MONITORING REPORT (DMR)
Calendar Year 2015
Individual NPDES Permit No, NCS 000533 or
Certificate of Coverage (COC) No. NCG❑❑❑❑❑❑
This monitoring report summary of the calendar year is due to the DWQ Regional Office no later than March I"of the following year.
Facility Name: SILAR LLC
County: COLUMBUS
Phone Number: ( 910 ) 655-4202 X 101 Total no. of SDOs monitored 4
Outfall No. 001
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total I i Total
Rainfall, TSS (mglL) TRC (mglL) BOD (mglL) COD (mglL) NH3 (mg/L.) TKN NO3+NO2 Phosphorous
inches (mglL) (mglL) (mglL)
Benchmark N/A 100 0.028 30 120 7.2 20 10 2
Date Sample
Collected,
mmfddlyy
01/12/15 1.44 10.0 0,029 5.62 41.7 <0.100 3.52 0.651 <0,100
02-01-2015 NIA
03-14-2015 NIA
04-09-2015 NIA
May NIA
06-03-2015 0.9 3.60 1 0.027 5.24 45.5 <0.100 <1.00 1.30 0.159
SWU-264-Generic-251Vlay2010

07-13-2015 .46 I NIA NIA NIA NIA NIA NIA N1A NIA
Additional Outfall Attachment
Outfall No. 001
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other []
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Methanol Hexamine Formaldehyde Total Copper Total Zinc Total Lead Non-Polar Oil pH
Rainfall,
inches (mglL) (mglL) (mglL) (mglL) (mg1L) (mglL) &Grease S.U.
{m !L
Benchmark N/A 7700 25,000 0.5 0.007 0.067 0.03 15 6 - 9
Date Sample
Collected,
mmlddlyy
01/12/15 1.44 <1.0 <10 0.505 0.0100 0.0480 <0.00300 1.09 7.27
02-01-2015 NIA
03-14-2015 NIA
04-09-2015 NIA
May NIA
06-03-2015 0.9 <1.0 <10 0.558 0.0100 0.0360 <0,00300 <5.00 6.86
07-13-2015 .46 NIA NIA NIA NIA NIA NIA NIA NIA
SWU-264-Generic-251Vlay2010

Additional Outfall Attachment
Outfall No. 002
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Total
Rainfall, TSS (mg/L) TRC (mg/L) BOD (mg/L) COD (mg/L) NH3 (mg/L) TKN (mg/L) NO3+NO2 Phosphorous
inches (mg/L) (mg/L)
Benchmark N/A 100 0.028 30 120 7.2 20 10 2
Date Sample
Collected,
mmlddlyy
01/12/15 1.44 35.6 0 5.05 39.5 <0.100 4.57 0.786 0.121
02-01-2015 NA
03-14-2015 1.38 18.4 0 13.5 78,2 4.98 8.96 .439 .16
04-09-2015 0.4 13.6 0 12.0 64.6 1.38 5.18 2.36 0.17
May NIA
06-03-2015 0.9 10.0 0 3.56 24.7 <0.100 <1.00 2.57 0.095
07-13-2015 .46 12.4 .003 14 113 3.3 9.7 0.71 0.21
Additional Outfall Attachment
SWU-264-Generic-25May2010

Outfall No. 002
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this S©O monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Methanol Hexamine Formaldehyde Total Copper Total Zinc Total Lead Non-Polar Oil pH
Rainfall, (mg1L) (mglL) (mglL) (mglL) (mglL) (rng1L) & Grease S.U.
Inches (mg/L)
Benchmark N/A 7700 25,000 0.5 0.007 0.067 0.03 15 6- 9
Date Sample
Collected,
mmlddlyy
01/12/15 1.44 <1.0 <10 0.590 0.0270 0.157 0.0210 1.98 7.84
02-01-2015 NA
03-14-2015 1.38 <1.0 13 13.6 .0205 0.090 .<00150 <5.00 7.22
04-09-2015 0.4 <1.0 81.7 6.66 0.0245 0.955 <0.00150 <5.00 7.04
May NIA
06-03-2015 0.9 <1.0 <10 2.28 0.0100 0.0750 <0.00300 6.10 8.01
07-13-2015 0.46 <10 <10 0.575 0.026 0.104 <0.01 <5 6.58
Additional Outfali Attachment
SW U-264-Generic-25Ma y2010

Outfall No. 005
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Total
Rainfall, TSS (mglL) TRC (mglL) BOD (mg1L) COD (mglL) NH3 (mglL) TKN (mglL) NO3+NO2 Phosphorous
inches (mglL) (mglL)
Benchmark N/A 100 0.028 30 120 7.2 20 10 2
Date Sample
Collected,
mmlddlyy
01112/15 1.44 27.20 0 10.6 48.1 <0.100 3.52 0.548 <0.100
02-01-2015 NA
03-14-2015 1.38 20.0 0 9.37 30.9 <0.100 4.98 0.359 0.13
04-09-2015 0.4 17.0 .010 14.6 102 <0.100 3.8 1.76 0.20
May NIA
06-03-2015 0.9 2.20 U14 4.82 25.9 <0.100 <1.00 1.71 0.128
07-13-2015 0.46 11.3 0.007 18 134 3.3 8.7 0.54 0.78
SWU-264-Generic-25May2010

Additional Outfall Attachment
Outfall No. 005
Is this outfail currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Methanol Hexamine Formaldehyde Total Copper Total Zinc Total Lead Non-Polar Oil pH
Rainfall, (mglL) (mglL) ( gI ) ( 9I ) ( 9I ) ( 9IL) $ Grease s.u.inches
(m IL)
Benchmark NIA 7700 25,000 0.5 0.007 0.067 0.03 15 6- 9
Date Sample T..
Collected,
mmlddlyy
01/12115 1.44 7.7 <10 0.983 0.0450 0.332 <0.0030 1.15 7.67
02-01-2015 NA
03-14-2016 1.38 <1.0 <10 5.49 0.0440 0.276 <0.0030 <5.00 7.74
04-09-2015 0.4 <1.0 <10 4.62 0.118 0.382 <0.00200 <5.00 7.36
May N/A
06-03-2015 0.9 <1.0 <10 1.68 0.0380 0.120 <0.00300 <5.00 7.69
07-13-2016 0.46 <10 <10 0.724 0.062 0.583 <0.01 <5 7.52
Additional Outfall Attachment
SW U-264-Generic-25 Ma y2010

Outfall No. 010 (added in February per inspection)
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Total
Rainfall, TSS (mglL) TRC (mg1L) BOD (mglL) COD (mglL) NH3 (mg1L) TKN (mglL) NO3+NO2 Phosphorous
inches (mg1L) (mglL)
Benchmark N/A 100 0.028 30 120 7.2 20 10 2
Date Sample
Collected,
mmlddfyy
01/12/15 1.44 14.0 0.005 5.14 30.9 <0.100 3.17 0.824 <0.100
02-01-2015 NA
03-14-2015 1.38 17.6 .033 11.6 43.8 <0.100 6.30 0.400 0.17
04-09-2015 0.4 5.14 0 13.7 35.0 <0.100 <1.00 2.90 0.13
May NIA
06-03-2015 0.9 2.40 0.011 9.95 16.3 <0.100 <1.00 1.61 0.099
07-13-2015 0.46 8.7 0.018 28 109 5.6 13 1.74 0.17
5WU-264-Generic-25May2010

Additional Outfall Attachment
Outfall No. 010 (added in February per inspection)
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Rain al Methanol Hexamine Formaldehyde Total Copper Total Zinc Total Lead Non-Polar Oil pH
inches, (mglL) (mglL) (mglL) (mglL) (mglL) (mglL) & Grease S.U.
m IL
Benchmark N/A 7700 25,000 0.5 0.007 0.067 0.03 15 6- 9
Date Sample -
Collected,
mm/ddlyy
01/12/15 1.44 <1.0 <10 0.484 0.0110 0.0550 <0.00300 1.95 7.01
02-01-2015 NA
03-14-2015 1.38 <1.0 <10 8.51 0.0295 0.106 <0.00150 <5.00 7.8
04-09-2015 0.4 <1.0 <10 6.88 0.0305 0.330 <0.00150 <5.00 7.10
May NIA
06-03-2015 0.90 <1.0 <10 2.85 0.0170 0.194 <0.00300 <5.00 7.33
07-13-2015 0.46 <10 <10 1.21 0.060 0.583 <0.01 <5 1 7.31
SW U-264-Generic-25May2010

STORMWATER DISCHARGE OUTFALL (SDO)
ANNUAL SUMMARY DATA MONITORING REPORT (DMR)
Calendar Year 2014
Individual NPDES Permit No. NCS 000533 or
Certificate of Coverage (COC) No. NCG❑❑❑❑❑❑
This monitoring report summary of the calendar year is due to the DWG?Regional Office no later than March 1s' of the following year.
Facility Name: SILAR LLC
County: COLUMBUS
Phone Number: ( 9_ 10 ) 655-4202 X 100 Total no. of SDOs monitored 4
Outfail No. 001
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Total
Rainfall, TSS (mglL) TRC (mglL) BOD (mg1L) COD (mglL) NH3 (mglL) TKN NO3+NO2 Phosphorous
inches 1 (mglL) (mglL) (mg1L)
Benchmark N/A 100 0.028 30 120 7.2 20 10 2
Date Sample
Collected,
mmlddlyy
January NIS
Feb No Flow
3/25/2014 0.4 13.00 0 8.91 63.1 <0.100 2.42 1.49 <0.100
4/30/2014 0.52 105 0 14.9 55.3 2.73 5.76 1.08 <0.05
May No Flow 2.45
6 No sample + I I I
SWU-264-Generic-25May2010

Additional Outfail Attachment
Outfall No. 001
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Total
Rainfall, TSS (mg1L) TRC (mg/L) BOD (m91L) COD (mg1L) NH3 (mglL) TKN (mglL) NO3+NO2 Phosphorous
inches (mg/L) (mglL)
Benchmark N/A 100 0.028 30 120 7.2 20 10 2
Date Sample
Collected,
mmlddlyy
7/28/2014 0.7 24.9 0 6.44 53.1 <.100 3.33 0.871 0.15
8 No sample
9 No sample
10 No flow
11 no sample
12/22/2014 0.37 22.1 0 16.6 69.7 4.22 4.22 1.18 1.10
SWU-264-Generic-25May2010

Additional Outfall Attachment
Outfall No. 001
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Methanol Hexamine Formaldehyde Total Copper Total Zinc Total Lead Non-Polar Oil pH
Rainfall, ) ( 9 ) ( 9 ) ( g ) ( g )
inches (mglL) (mglL m 1L m /L m 1L m IL & Grease S.U.
�mg/L)
Benchmark N/A 7700 25,000 0.5 0.007 0.067 0.03 15 6- 9
Date Sample
Collected,
mmlddlyy
January N/S
Feb No Flow
3/25/2014 0.4 <1.0 <10 1.28 0.00700 0.013 <0A0100 <5.0 6.71
4/30/2014 0.52 <1.0 <10 2.26 0.01300 0.1 0.00320 <5.0 6.56
May No Flow 2.45
6 no sample
7128/2014 0.7 <1.0 <10 1.66 0.026 0.0818 0.0010 0.850 6.82
8 No sample
9 no Sample
10 No Flow
11 no sample
12/22/2014 0.37 <1.0 <10 1.54 0.0140 0.0490 <0.00300 4.38 6.66
SW U-264-Generic-25May2010

Additional Outfall Attachment
Outfall No. 002
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfali ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Total
Rainfall, TSS (mg/L) TRC (mg1L) BOD (mg/L) COD (mg/L) NI-3(mg/L) TKN (mg/L) NO3+NO2 Phosphorous
inches (mg/L) (mg/L)
Benchmark NIA 100 0.028 30 120 7.2 20 10 2
Date Sample
Collected,
mmldd/yy
January NIS
2121/14 0.29 41.2 0 29.4 126 13.3 19.4 1.24 0.11
3125/2014 0.4 12.20 0 7.68 44.3 <0.100 3.03 1.11 0.064
4/30/2014 0.52 26.8 0.001 14.6 102 <0.100 3.64 0.951 0.120
5115/2014 2.45 28.8 0 24.2 53.3 3.33 6.97 0.502 0.11
6e no sample
7115/14 0.7 8.75 0 28 90.5 6.67 13.3 1.65 0.099
8 no sample
9 no sample
10/15/2014 1.67 16.8 0.027 3.01 21.8 <1.00 <1.00 0.702 0.084
11 no sample
12122/2014 0.37 50.0 0 3.96 40.1 <1.00 5.63 0.544 1.13
Additional Outfall Attachment
SWU-264-Generic-25May2010

Outfall No. 002
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfatl ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfatl was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Methanol Hexamine Formaldehyde Total Copper Total Zinc Total Lead Non-Polar Oil pH
Rainfall, 9 ) { 9 ) ( g ) ( g )
inches (mglL) (mglL) (m IL m !L m IL m IL � Grease S.U.
m 1L)
Benchmark N/A 7700 25,000 0.5 0.007 0.067 0.03 15 6- 9
Date Sample
Collected,
mmlddlyy
January N/S
2121114 6.29 0.0 24 26.1 0.037 0-25 0.00219 <5.0 7.46
3125/2014 0.4 <1.0 <10 2.160 0.02200 0.166 0.00150 <5.0 7.43
4/30/2014 0.52 <1.0 <10 7.62 0.03000 0.340 0.00360 <5.0 6.95
5/15/2014 2.45 <1.0 <10 7.59 0.022 0.17 0.0020 <5 7.97
6 no sample
7115/14 0.7 <1.0 <10 4.77 0.023 0.146 0.0015 2.95 6.7
8 No sample
9 No sample
10/15/2014 1.07 <1.0 <10 1.60 0.0095 0.071 0.0014 1.02 8.16
11No sample
12/22/2014 0.37 <1.0 <10 1.45 0.0210 0.178 <0.00300 2.80 7.66
Additional Outfall Attachment
SWU-264-Generic-251Vlay2010

Outfall No. 005
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes❑ No X
Parameter, (units)
Total Total
Rainfall, TSS(mg1L) TRC (mg/L) BOD (mglL) COD (mglL) NH3 (mg1L) TKN (mg1L) NO3+NO2 Phosphorous
inches (mg/L) (mg1L)
Benchmark N/A 100 0.028 30 120 7.2 20 10 2
Date Sample
Collected,
mmlddlyy
January N1S
2121114 0.29 19.6 0 31.3 115 6.37 10.6 2.09 0.087
3/25/2014 0.4 8.75 0 13.9 57.5 <0.100 2.12 0.661 <0.05
4/3012014 0.52 15.00 0 25.5 96.3 3.03 9.09 0.962 0.085
5115/2014 2.45 17.5 0 24.2 70.6 2.73 6.97 0.621 0.12
6 no sample
7115/14 0.7 5.75 0.013 21.2 68.4 4.24 7.88 1.56 0.23
8 No Sample
9 No Sample
10/15/2014 1.07 15.8 0.037 9.13 34.7 <1.0 <1.0 0.991 0.13
11 no sample
12122/2014 0.37 31.0 0 4.89 47.3 <0.100 <1.0 0.506 <0.100
SWU-264-Generic-25May2010

Additional Outfall Attachment
Outfall No. 005
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Methanol Hexamine Formaldehyde Total Copper Total Zinc Total Lead Non-Polar Oil pH
Rainfall, (mg/L) (mg1L) (mglL) (mg/L) (mg/L) (mg1L) & Grease S.U.
inches mg1L)
Benchmark N/A 7700 25,000 0.5 0.007 0.067 0.03 15 6- 9
Date Sample
Collected,
mmlddlyy
January NIS
2121114 0.29 <1.0 <10 15.3 0.096 0.3 <0.001
<5.0 7.4
3/25/2014 0.4 <1.0 <10 1.67 0,04900 0.521 <0.0010 <5.0 7.31
413012014 0.52 <1.0
<10 8.100 0.08300 0.53 0.00170 <5.0 8.89
5/15/2014 2.45 <1.0 <10 8.21 0.10 0.76 0.0016 <5.0 9.10
6 no sample
7115114 0.7 <1.0 <10 2.74 0.044 0.352 <0.0010 1.36 6.31
8-no sample
9-no sample
10/15/2014 1.07 <1.0 <10 2.86 0.042 0.21 0.0025 1.42 7.45
11-no sample
12/2212014 0.37 <1.0 <10 3.58 0.0780 0.361 <0.0070 2.55 7.29
Additional Outfall Attachment
SWU-264-Generic-25May2010

Outfall No. 010 (added in February per inspection)
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Total
Rainfall, TSS (mg1L) TRC (mglL) BOD(mg1L) COD (mg1L) NH3 (mg1L) TKN (mg1L) NO3+NO2 Phosphorous
inches (mg1L) (mg1L)
Benchmark N/A 100 0.028 30 120 7.2 20 10 2
Date Sample
Collected,
mmlddlyy
January NIS
Feb No Flow
3/25/2014 0.4 4.50 0 9.66 33.2 <0.100 <1.00 0.801 <0.050
4/30/2014 0.52 27.00 0 121 553 2.42 5.76 0.826 0.150
5/1512014 2.45 7.75 0.012 >142.01 2900 3.94 7.58 1.77 0.14
6 no sample
7/15114 0.7 12.5 0 96.7 162 12.4 15.8 1.27 0.18
8-no sample
9-no sample
10116/2014 1.07 3.2 0 7.84 33.8 <1.0 71.5 0.934 0.057
11-no sample
12/2212014 0.37 3.50 0 6.87 13.6 5.39 3.75 0.827 <0.100
SW U-264-Generic-25May2010

Additional Outfall Attachment
Outfall No. 010 (added in February per inspection)
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Methanol Hexamine Formaldehyde Total Copper Total Zinc Total Lead Non-Polar Oil pH
Rainfall, (mglL) (mg1L) (mg/L) (mg1L) (mg1L) (mglL) & Grease S.U.
inches
m !L
Benchmark N/A 7700 25,000 0.5 0.007 0.067 0.03 15 6- 9
Date Sample
Collected,
mmlddlyy
January N1S
Feb No Flow
3126/2014 0.4 11.0 <10 2.31 0.01600 0.214 <0.00100 <5.0 6.11
4130/2014 0.52 <1.0 <10 7.260 0.02400 0.14 0.00200 <5.0 5.87
5/15/2014 2.45 <1.0 <10 11.8 0.045 0.39 0.0013 <5.0 7.22
6 no sample
7/15114 0.7 <1.0 <10 5.29 0.078 0.848 0.0011 1.92 6.19
8-no sample
9-no sample
10/15/2014 1.07 0.0 <10 1.46 0.017 0.26 0.0061 2.28 6.98
11-no sample
12/22/2014 0.37 0.0 <10 2.07 0.0240 0.237 <0.00300 1.70 6.61
SW U-264-Generic-25May2010

STORMWATER DISCHARGE OUTFALL (SDO)
ANNUAL SUMMARY DATA MONITORING REPORT(DMR)
Calendar Year 2013
Individual NPDES Permit No. NCS 000533 or i
Certificate of Coverage (COC) No. NCG❑❑❑❑❑❑
This monitoring report summary of the calendar year is due to the DWQ Regional Office no later than March 151 of the following year.
Facility Name: SILAR LLC
County: COLUMBUS
Phone Number: ( 910 ) 655-4202 X 100 Total no. of SDOs monitored 4
Outfali No. 001
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Total
Rainfall, TSS (mglL) TRC (mgiL) BOD (mgiL) COD (mglL) NH3 (mglL) TKN NO3+NO2 Phosphorous
inches (mgiL) (mglL) (mg1L)
Benchmark N/A 100 0.028 30 120 T.2 20 10 2
Date Sample
Collected,
mmlddiyy
Jan No Flow
Feb No Flow
3/12/2013 0.43 18.6 0.009 27 35 36.1 42.5 10 0.62
Apr No Flow
5123/2013 0.46 42.7 0 14 107 <0.100 4.58 0.362 0.710
61312013 2.37 153 0 14.8 80.3 <0.100 3.36 1.68 0.400
SWU-264-Generic-251Vlay2010

Additional Outfall Attachment
Outfall No. 001
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2(monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Iota
Rainfall, TSS (mg/L) TRC (mg/L) BOD (mg/L) COD (mg1L) NH3 (mg1L) TKN (mg/L) NO3+NO2 Phosphorous
inches (mg/L) (mg/L)
Benchmark IV/A 100 0.028 30 120 7.2 20 90 2
Date Sample
Collected,
mmlddlyy
7/12/2013 1.02 47.50 0 9.97 60.9 <0.100 3.05 0.511 0.200
Aug no sample
9/16/2013 1.5 27.00 0 10.2 54.4 <0.100 3.23 1.49 0.230
Oct No sample
11126/2013 2.06 67.9 0 10.7 138 1.22 9.18 1.74 0.660
Dec No Flow
SW U-264-Generic-25May2010

Additional Outfall Attachment
Outfali No. 001
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Methanol Hexamine Formaldehyde Total Copper Total Zinc Total Lead Non-Polar Oil pH
Rainfall, (mg1L) (mg1L) (mg/L) (mg1L) (mg1L) (mg1L) & Grease S.U.
inches m IL)
Benchmark N/A 7700 25,000 0.5 0.007 0.067 0.03 15 6- 9
Date Sample
Collected,
mm/dd/yy
1/2/2013 No
Flow
2/712013 No
Flow _
3/12/2013 0.43 <10 <10 0.164 <0.007 0.02 <0.010 <5 6.93
4/4/2013 No
Flow
5/2312013 0.46 <10 <10 0.906 <0.0068 0.0394 <0.00100 <5.00 6.64
613/2013 2.37 2.68 <10 0.417 0.01300 0.175 0.00503 <5.00 6.76
7/12/2013 1.02 <1.0 <10 <0.500 0.00970 0.031 <0.0075 <5.00 7.25
Aug no sample
9/16/2013 1.5 <1.0 47 0.273 0.00770 0.028 0.00194 <5.00 6.95
Oct No sample
1112612013 2.06 <1.0 <10 1.710 0.00960 0.074 0.00130 <5.00 6.86
Dec No Flow
SWU-264-Generic-25May2010

Additional Outfall Attachment
Outfall No. 002
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Total
Rainfall, TSS (mglL) TRC (mg1L) BOD (mglL) COD(mglL) NH3 (mg1L) TKN (mglL) NO3+NO2 Phosphorous
inches (mg1L) (mg/L)
Benchmark N/A 100 0.028 30 120 7.2 20 10 2
Date Sample
Collected,
mmlddlyy
1/212013 0.2 32.5 0 3 31 0.5 0.9 0.48 <0.04
2/7/2013 1.89 58 0 15 89 2.8 9.4 0.38 0.07
3112/2013 0.43 63.8 0 7 53 0.8 1.9 0.57 0.13
4/4/2013 0.73 80.5 0 20 122 1.5 10.4 0.51 0.25
5/23/2013 0.46 5.00 0 13.8 47.6 4.28 8.86 1.13 0.074
6/312013 2.37 36.8 0 8.13 67.4 3.36 7.94 1.12 0.230
7/12/2013 1.02 11.00 0.026 17.1 45.8 1.83 4.89 0.552 <0.050
Aug No sample
9/16/2013 1.5 12.00 0 9.08 50.1 3.23 6.47 1.73 <0.050
Oct No sample
11/26/2013 2.06 82.00 0 7.25 88.6 <1.0 3.67 1.08 0.290
12110/2013 0.16 24.6 0 9.23 52.3 7.34 9.18 1.19 0.051
Additional Outfall Attachment
SWU-264-Generic-25May2010

Outfall No. 002
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Methanol Hexamine Formaldehyde Total Copper Total Zinc Total Lead Non-Polar Oil pH
Rainfall, (mg1L) (mg1L) (mg/L) (mg1L) (mg1L) (mg/L) & Grease S.U.
inches
(mglL)
Benchmark N/A 7700 25,000 0.5 0.007 0.067 0.03 15 6 - 9
Date Sample
Collected,
mmlddlyy
1/2/2013 0.2 <10 <10 0.490 0.029 0.158 <0.010 <5 7.74
2/712013 1.89 <10 <10 1.27 0.067 0.313 <0.010 <5 6.83
3/12/2013 0.43 <10 <10 0.662 0.035 0.235 <0.010 <5 7.77
4/4/2013 0.73 <10 <10 0.710 0.044 0.274 <0.010 <5 7.35
5/23/2013 0.46 <10 10 17.273 0.00900 0.186 <0.00100 <5.00 7.38
6/3/2013 2.37 1.17 <10 12.125 0.03500 0.260 0.00418 <5.00 7.42
7112/2013 1.02 8.3 <10 0.634 0.01500 0.083 <0.0075 <5.00 8.02
Aug no sample
9/1612013 1.5 1.2 14 8.38 0.02500 0.120 0.00232 <5.00 7.82
Oct No sample
11/26/2013 2.06 2.5 <10 2.68 0.03900 .280 0.00412 <5.00 8.07
12/10/2013 0.16 <1.0 12 14.600 0.02100 0.26 0.00422 <5.00 7.63
Additional Outfall Attachment
SWU-264-Generic-251Vlay2010

V
ll No. 005
s outfall currently in Tier 2 (monitored monthly)? Yes X No ❑his outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑s outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Total
Rainfall, TSS(mglL) TRC (mg/L) BOD (mgJL) GOD (mg/L) NH3 (mglL) TKN (mg1L) NO3+NO2 Phosphorous
inches (mg/L) (mg1L)
Benchmark N/A 100 0.028 30 120 7.2 20 10 2
Date Sample -
Collected,
mm/dd/yy
1/2/2013 0.2 32.8 0 4 42 0.7 1.2 0.27 0.08
2/7/2013 1.89 190 0 50 147 2.6 7.9 0.39 0.23
3/12/2013 0.43 61.2 0 11 136 0.90 2.9 0.36 0.13
4/4/2013 0.73 60.5 0 16 106 0.90 3.3 0.41 0.17
5123/2013 0.46 6.6 0 41.67 135 3.36 7.33 1.05 0.300
6/3/2013 2.37 13 0 34.6 52.3 <0.100 1.22 0.855 0.094
7112/2013 1.02 14.2 0 50.2 97.5 2.14 3.36 0.444 0.110
Aug No sample
9/16/2013 1.5 10.8 0 12.9 50.1 3.23 3.82 0.828 <0.050
Oct No sample
11126/2013 2.06 79.00 0 13 119 <0.100 3.67 1.03 0.270
12/10/2013 0.16 37.5 0 371 660 5.20 10.1 1.39 0.350
SWLI-264-Generic-25May2010

i
Additional Outfall Attachment
Outfall No. 005
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWO to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Methanol Hexamine tFormaidehyde Total Copper Total Zinc Total Lead Non-Polar Oil pH
Rainfall, (mg1L) (mglL) lL) (mg1L) (mglL) (mglL) & Grease s.u.
inches (m IL
Benchmark N/A 7700 25,000 0.5 0.007 0.067 0.03 15 6- 9
Date Sample
Collected,
mmlddlyy
112/2013 0.2 <10 <10 0.58 0.118 0.478 <0.010 <5 7.56
217/2013 1.89 <10 <10 1.10 2.500 1.100 0.014 8 7
3/12/2013 0.43 <10 <10 0.912 0.116 0.878 <0.010 <5 7.8
414/2013 0.73 <10 <10 0.672 0.081 0.371 <0.010 <5 7.73
5/23/2013 0.46 <10 <10 12.618 0.03400 0.285 0.00179 <5.00 7.1
61312013 2.37 1.07 <10 0.851 0.02600 0.238 0.01060 <5.00 7.43
7/12/2013 1.02 <1.0 <10 <0.500 0.01800 0.33 <0.0075 <5.00 7.33
Aug no sample
9/16/2013 1.5 <1.0 39 1.32 0.03200 0.49 0.00234 <5.00 8.09
Oct No sample
11/2612013 2.06 <1.0 <10 2.39 0.1300 0.84 0.00804 <5.00 7.62
12/10/2013 0.16 545.6 <10 13.200 1.6000 5.6 0.01741) <5.00 2.97
Additional Outfall Attachment
5WU-264-Gene ric-25May2010

Outfall No. 010 (added in February per inspection)
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Total
Rainfall, TSS (mg/L) TRC (mg1L) BOD (mg/L) COD (mg/L) NH3 (mg/L) TKN (mg1L) NO3+NO2 Phosphorous
inches (mg/L) (mg/L)
Benchmark N/A 100 0.026 30 120 7.2 20 10 2
Date Sample
Collected,
mm/dd/yy
112/2013 no
Flow
2/7/2013 1.89 12.0 0 13 62 1.3 5.4 0.22 <0.04
3/12/2013 0.43 10.9 0.003 7 <20 0.80 1.6 0.35 <0.04
4/4/2013 0.73 40.6 0 59 241 5.8 5.8 0.49 0.35
5123/2013 0.46 4.25 0.019 41.79 302 4.58 8.86 0.973 0.072
6/3/2013 2.37 44 0.009 22.7 113 1.53 4.89 1.24 0.200
7/12/2013 1.02 7.75 0.023 13.6 32.9 1.53 2.44 0.398 <0.050
Aug No sample
9/16/2013 1.5 3.75 0 56.9 113 2.06 5.29 1.58 <0-050
Oct No sample
11126/2013 2.06 27.00 0 26.1 77 2.14 3.98 1.05 0.220
12110/2013 0.16 11.50 0.001 119 237 9.18 14.4 1.36 <0.050
SWU-264-Generic-25May2010

Additional Outfall Attachment
Outfall No. 010 (added in February per inspection)
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Methanol Hexamine Formaldehyde Total Copper Total Zinc Total Lead Non-Polar Oil pH
Rainfall, (mg/L) (mg1L) (mg/L) (mg1L) (mg/L) (mg/L) & Grease s.u.
inches
(m IL
Benchmark NIA 7700 25,000 0.5 0.007 0.067 0.03 15 6 - 9
Date Sample
Collected,
mm/ddlyy
1/2/2013 No
Flow
21712013 1.89 <10 <10 1.510 0.044 0.386 <0.010 <5 6.63
3/1212013 0.43 <10 <10 0.67 0.020 0.257 <0.010 <5 6.99
4/4/2013 0.73 <10 <10 0.642 0.034 0.327 <0.010 10 7.26
5123/2013 0.46 <10 <10 16.886 0.01000 0.378 <0.00100 <5 7.14
6/3/2013 2.37 1.19 <10 6.594 0,13300 0.745 0.00497 <5 6.56
7/12/2013 1.02 3.1 <10 <0.500 0.01100 0.227 <0.0075 <5.00 6.61
Aug No sample
9/16/2013 1.5 0.0 <10 2.660 0.03900 0.48 0.00172 <5.00 7.27
Oct No sample
11/26/2013 2.06 <1.0 <10 2.100 0.04800 0.54 0.00421 <5.00 6.88
12/10/2013 0.16 0.0 11 21.700 0.05000 0.49 0.00117 <5.00 6.92
SWU-264-Generic-251VIay2010

STORMWATER DISCHARGE OUTFALL (SDO)
ANNUAL SUMMARY DATA MONITORING REPORT(DMR)
Calendar Year 2012
Individual NPDES Permit No. NCS 000533 or
Certificate of Coverage (COC) No. NCG❑❑❑❑❑❑
This monitoring report summary of the calendar year is due to the DWQ Regional Office no later than March V of the following year.
Facility Name: SILAR LLC
County: COLUMBUS
Phone Number: ( 910 ) 655-4202 X 100 Total no. of SDOs monitored 4
Outfall No. 001
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Total
Rainfall, TSS (mg1L) TRC(mglL) BOD (mg/L) COD (mg1L) NH3 (mg1L) TKN NO3+NO2 Phosphorous
inches (mg/L) (mg1L) (mglL)
Benchmark N/A 100 0.028 30 120 7.2 20 10 2
Date Sample
Collected,
mmfdd/yy
01111/12 0.96 81.3 0.032 39 93 26.6 50.3 18.2 2.08
Feb (no
sample)
03103/12 2.4 6.8 0.016 8 20 67.2 52.3 10.6 0.94
04/06/12 0.36 No Flow No Flow No Flow No Flow No Flow No Flow No Flow No Flow
05109/12 0.27 No Flow No Flow No Flow No Flow No Flow No Flow No Flow No Flow
06112/12 1.02 29.0 6 6 65 0.30 2.3 1.31 0.27
SW U-264-Generic-25May2010

i
Additional Outfall Attachment
Outfall No. 001
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Total
Rainfall, TSS (mg/L) TRC (mglL) BOD (mg/L) COD (mglL) NH3 (mg/L) TKN (mglL) NO3+NO2 Phosphorous
inches (mg1L) (mglL)
Benchmark N/A 100 0.028 30 120 7.2 20 10 2
Date Sample
Collected,
mmldd/yy
07/31/12 0.78 No Flow No Flow No Flow No Flow No Flow No Flow No Flow No Flow
08/19/12 0.42 No Flow No Flow No Flow No Flow No Flow No Flow No Flow No Flow
Sep No
samples
10/15/12 2.5 No Flow No Flow No Flow No Flow No Flow No Flow No Flow No Flow
Nov no
samples
12/12112 0.95 No Flow No Flow No Flow No Flow No Flow No Flow No Flow No Flow
SWU-264-Generic-25May2010

Additional Outfall Attachment
Outfall No. 001
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Methanol Hexamine Formaldehyde Total Copper Total Zinc Total Lead Non-Polar Oil pH
Rainfall, (mg/L) (mg1L) (mg/L) (mglL) (mg/L) (mg/L) &Grease S.U.
inches
m IL
Benchmark N/A 7700 25,000 0.5 0.007 0.067 0.03 15 6 - 9
Date Sample
Collected,
mmlddlyy
01/11/12 0.96 <10 <10 0.047 0.011 0.058 <0.010 <5 6.89
Feb no
sample
03/03/12 2.4 <10 <10 0.086 <0.007 0.019 <0.010 <5 6.9
04/06/12 0.36 No Flow No Flow No Flow No Flow No Flow No Flow No Flow No Flow
05/09/12 0.27 No Flow No Flow No Flow No Flow No Flow No Flow No Flow No Flow
06/12/12 1.02 <10 <10 0.069 0.011 0.069 <0.01 <5 6.92
07/31/12 0.78 No Flow No Flow No Flow No Flow No Flow No Flow No Flow No Flow
08/19/12 0.42 No Flow No Flow No Flow No Flow No Flow No Flow No Flow No Flow
Sep No
samples
10/15112 2.5 No Flow No Flow No Flow No Flow No Flow No Flow No Flow No Flow
Nov no
samples
12/12/12 0.95 No Flow No Flow No Flow No Flow No Flow No Flow No Flow No Flow
SWU-264-Generic-251Vlay2010

Additional Outfall Attachment
Outfall No. 002
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Total
Rainfall, TSS (m91L) TRC (mg1L) BOD (mg1L) COD (mg/L) NH3 (mg/L) TKN (mg/L) NO3+NO2 Phosphorous
inches (mglL) (mg1L)
Benchmark NIA 100 0.028 30 120 7.2 20 10 2
Date Sample
Collected,
mmlddlyy
01/11/12 0.96 113 0 10 96 2.7 14.1 1.14 0.37
Feb no
sample._
03/03/12 2.4 20.8 0 39 189 8.5 25.5 1.72 0.13
04/06/12 0.36 19.0 0 4 66 1.9 6.3 1.58 0.25
05/09/12 0.27 134 0.021 30 189 1.5 19.9 1.01 0.6
06112/12 1.02 125 0.032 <5 54 0.4 1.3 0.39 0.17
07/31/12 0.78 42 0 12 70 1.2 4.8 1.03 0.19
08119/12 0.42 6.7 0 28 190 3.6 15.6 1.62 0.12
Sep No
samples
10/15/12 2.5 11.9 0 6 23 0.7 1.9 0.45 <0.04
Nov no
samples
12112M 2 1 0.96 14.7 0 5 24 0.4 1.9 0.56 <0.04
5 W U-264-Gene ric-25 M a y2010

Additional Outfall Attachment
Outfall No. 002
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Methanol Hexamine Formaldehyde Total Copper Total Zinc Total Lead Non-Polar Oil pH
Rainfall, (mglL) (mg/L) (mg1L) (mg1L) (mg/L) (mglL) & Grease S.U.
inches (mglL)
Benchmark N/A 7700 25,000 0.5 0.007 0.067 0.03 15 6 - 9
Date Sample
Collected,
mmlddlyy
01/11/12 0.96 <10 <10 1.26 0.108 0.34 <0.01 <5 7.82
Feb no
sample
03/03112 2.4 <10 <10 2.1 0.089 0.25 <0.01 <5 7.04
04/06/12 0.36 <10 <10 0.925 0.323 1.16 <0.01 <5 8-28
05109112 0.27 <10 <10 4.4 0.174 0.802 <0.01
<5 7.59
06112112 1.02 <10 <10 0.319 0.049 0.211 <0.01
<5 8.78
07/31/12 0.78 <10 <10 2.56 0.06 0.610 <0.01 <5 7.25
08/19/12 0.42 <10 <10 4.04 0.061 0.323 <0.01 <5 8.3
Sep No
samples <5 7 88
10/15112 2.5 <10 <10 <0.05 0.047 0.170 <0.015
Nov no
samples
12112112 0.95 <10 <10 0.85 0.014 0.163 <0,105 <5 6.7
SWU-264-Generic-25May2010

Additional Outfall Attachment
Outfall No. 005
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Total
Rainfall, TSS (mglL) TRC (mg/L) BOD (mg/L) COD (mg1L) NI-13 (mg1L) TKN (mg1L) NO3+NO2 Phosphorous
inches (mg/L) (mglL)
Benchmark N/A 100 0.028 30 120 7.2 20 10 2
Date Sample
Collected,
mmlddlyy
01/11/12 0.96 58.7 0 6 55 0.9 2.6 0.36 0.28
Feb no
sample
03/03/12 2.4 21.4 0 13 104 3.7 10.8 1.03 0.2
04/06/12 0.36 20 0 158 336 1.5 6.3 1.58 0.25
05/09/12 0.27 23 0.007 14 64 1.3 4.9 0.66 0.32
06/12/12 1.02 17.8 0.013 4 95 0.4 1 0.33 0.17
07131/12 0.78 4.9 0 10 53 1 4.3 1.02 0.09
08/19/12 0.42 22 0 26 157 4.3 15.9 1.32 0.28
Sep No
samples
10/15/12 2.5 30.5 0 13 58 0.6 2.9 0.45 <0.04
Nov no
samples
12/12/12 0.95 20.5 0 22 59 0.5 2.1 0.42 0.19
SW U-264-Generic-25May2010

Additional Outfall Attachment
Outfall No. 005
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DVVQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Methanol Hexamine Formaldehyde Total Copper Total Zinc Total Lead Non-Polar Oil pH
Rainfall, (mg/L.) (mg/L) (mglL) (mg/L) (mg1L) (mg/L) & Grease S.U.
inches
(m 1L)
Benchmark N/A 7700 25,000 0.5 0.007 0.067 0.03 15 6 - 9
Date Sample
Collected,
mmlddlyy
01/11/12 0.96 <10 <10 0.089 0.223 0.485 <0.01 <5 7.14
Feb no
sample
03/03/12 2.4 <10 <10 0.83 0.18 0.357 <0.01 <5 6.96
04/06/12 0.36 <10 <10 0.925 0.323 1.16 <0.01 <5 8.92
05/09/12 0.27 <10 <10 0.756 0.176 0.409 <0.01 <5 8.57
06/12/12 1.02 <10 <10 0.251 0.047 0.167 <0.01 <5 7.91
07/31/12 0.78 <10 <10 2.16 0.087 0.377 <0.01
<5 7.7
08119/12 0.42 <10 <10 3.64 0.192 1.17 <0.01 <5 7.87
Sep No
samples
10115/12 2.6 <10 <10 <0.05 0.110 0.71 <0.015 <5 7.59
Nov no
samples
12/12/12 0.95 <10 <10 0.55 0.049 .732 <0.01 <5 6.57
SWU-264-Generic-25May2010

Additional Outfall Attachment
Outfall No. 010 (added in February per inspection)
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Total
Rainfall, TSS (mglL) TRC (mg/L) BOD(mglL) COD (mg1L) NH3 (mglL) TKN (mglL) NO3+NO2 Phosphorous
inches (mg1L) (mglL)
Benchmark IV/A 100 0.028 30 120 7.2 20 10 2
Date Sample
Collected,
mm/ddlyy
Feb no
sample
03/03112 2.4 27.8 0 18 93 6.8 9.7 0.79 0.28
04/22112 0.36 21.6 0 22 85 4.6 9.5 0.65 0.51
05/09112 0.27 10.6 0.012 18 62 3.6 11.1 1.12 0.45
06/12112 1.02 34.4 0.028 7 63 0.6 1.2 0.21 0.16
07/31/12 0.78 14.2 0 19 72 3.1 7.7 3.5 0.26
08/19112 0.42 12.9 0.017 >31 248 6.7 18.2 1.33 0.22
Sep No
samples
10/15/12 2.5 No Flow No How No Flow No Flow No Flow No Flow No Flow No Flow
Nov no
samples
12/12112 0.95 6.5 0.004 7 24 0.6 2.5 0.38 <0.04
SWU-264-Generic-25May2010

Additional Outfall Attachment
Ouffall No. 010 (added in February per inspection)
Is this outfall currently in Tier 2 (monitored monthly)? Yes X No ❑
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes X No ❑
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No X
Parameter, (units)
Total Methanol Hexamine Formaldehyde Total Copper Total Zinc Total Lead Non-Polar Oil pH
Rainfall,
inches (mg/L) (mglL) (mg1L) (mg/L) (mglL) (mglL) & Grease S.U.
(m IL
Benchmark N/A 7700 25,000 0.5 0.007 0.067 0.03 15 6- 9
Date Sample
Collected,
mmlddlyy
Feb no
sample
03/03/12 2.4 <10 <10 0.635 0.056 0.423 1 <0.01 <5 6.73
04/22/12 0.36 <10 <10 0.375 0.076 0.689 <0.01 <5 6.73
05/09/12 0.27 <10 <10 1.77 0.057 0.492 <0.01 <5 6.95
06112112 1.02 <10 <10 0.27 0.048 0,232 <0.01 <5 8.39
07/31112 0.78 <10 <10 4.0 0.107 0.756 <0.01 <5 7.47
08119112 0.42 <10 <10 4.53 0.081 0.796 <0.01 <5 7.15
Sep No
samples
10/15/12 2.5 No Flow No Flow No Flow No Flow No Flow No Flow No Flow No Flow
Nov no
samples
12/12112 0.95 <10 <10 0.71 0.022 0.253 <0.01 <5 6.57
SWU-264-Generic-25May2010

STORMWATER DISCHARGE OUTFALL (SDO)
ANNUAL SUMMARY DATA MONITORING REPORT (DMR)
Calendar Year 2011
Individual NPDES Permit No. NCS 000533 or
Certificate of Coverage (COC) No. NCG❑❑❑❑❑❑
This monitoring report summary of the calendar year is due to the DWQ Regional Office no later than March V of the following year.
Facility Name: Silar LLC (Sitar Laboratories)
County: Columbus
Phone Number: (_910_) _655-4212 Total no. of SDOs monitored 3
Outfali No. _001
Is this outfall currently in Tier 2 (monitored monthly)? Yes ❑ No
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes ❑ No
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No
Parameter, (units)
Total TSS TRC BOO COD NH3 TKN NO3+NO2 Total
Rainfall, mg/L mglL mglL mglL mglL mglL mg/L Phosphorus
inches
mglL
Benchmark N/A 100 0.028 30 120 7.2 20 10 2
Date Sample
Collected,
mmlddlyy
01/17/2011 0.31 7.5 0.002 6 32 54.9 161.4 112.5 1.01
04/05/2011 0.33 24.7 0.004 18 66 62.1 46.5 13.9 1.04
09/20/2011 1.35 231 0 6 55 1.4 3.8 1.96 0.28
11/2912011 1.4 23.1 0 6 53 2.4 3.3 3.29 0.14
SW U-264-Generic-25May2010

Additional Outfall Attachment
Outfall No. _001_
Is this outfall currently in Tier 2 (monitored monthly)? Yes ❑ No
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes ❑ No
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from ❑WQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No
Parameter, (units)
Total Methanol Hexamine Formaldehyde Total Copper Total Zinc Total Lead Non-Polar H
Rainfall, y PP Oi# 8� Grease P
inches mglL mg1L mglL mglL mg1L mg1L mg/L S.U.
Benchmark N/A 7700 25,000 0.5 0.007 0.067 0.03 15 6 - 9
Date Sample
Collected,
mmlddlyy
01117/2011 0.31 <10 <10 0.13 <0.010 0.037 <0.010 1 <5 7.22
04105/2011 0.33 <10 <10 0.3707 0.012 0.132 <0.010 <5 7.08
09120/2011 1.35 <10 <10 0.206 0.02 0.062 <0.010 <5 6.73
11/29/2011 1.4 <10 <10 0.066 0.008 0.029 <0.010 <5 6.74
SWU-264-Generic-25May2010

Outfall No. `002
Is this outfall currently in Tier 2 (monitored monthly)? Yes ❑ No
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes ❑ No
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No
Parameter, (units)
Total TSS TRC BOD COD NI-13 TKN NO3+NO2 Total
Rainfall, Phosphorus
inches mglL mgJL mglL mglL mg1L mglL mglL mg1L
Benchmark N/A 100 0.028 30 120 7.2 20 10 2
Date Sample
Collected,
mrn/dd/yy
01/17/2011 0.31 57.3 0 49 178 23.00 27.1 1.65 0.35
04/05/2011 0.33 66.5 0.018 120 399 1.6 89.8 1.6 0.37
09/20/2011 1.35 19 0.023 32 291 1.7 62.6 0.89 <0.04
11/29/2011 11.4 5.9 0 4 128 0.6 3.6 0.91 <0.04
SW U-264-Ge n eri c-2 5 M ay2010

Outfali No. _002`
Is this outfall currently in Tier 2 (monitored monthly)? Yes ❑ No
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes ❑ No
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No Ej
Parameter, (units)
Total Non-Kolar
Rainfall, Methanol Hexamine Formaldehyde Total Copper Total Zinc Total Lead Oil & Grease pH
inches mglL mglL mg1L rnglL mglL rnglL mg/L S.U.
Benchmark N/A 7700 25,000 0.5 0.007 0.067 0.03 15 6 - 9
Date Sample
Collected,
mmlddlyy
01/17/2011 0.31 <10 121.4 1.85 0.103 10.460 <0.010 <5 8.03
04/0512011 0.33 10.7 <10 0.75 0.433 0.811 <0.01 <5 7.47
09 010/2011 1.35 <10 217 5.25 0.052 0.144 <0.01 <5 7.42
11/29/2011 1.4 <10 <10 0.3 0.014 0.087 <0.01 <5 7.19
SWU-264-Generic-25May2010

DATA FROM UP-GRADIENT STORMWATER FLOW (MOMENTIVE/OAK BARK)
Parameter, (units)
Rainfall,al TSS TRC SOD COD NH3 TKN NO3+NO2 Total
inches mg1L mg/L mg1L mg/L mg/L mg/L mg1L Pho sphL rus
g
Benchmark N/A 100 0.028 30 120 7.2 20 10 2
Date Sample
Collected,
mmlddlyy
0111712011 0.31 170 0 362 2180 476.00 975 15.4 1.2
04/0512011 0.33 146 0 248 523 1.0 80.6 9.94 0.56
09/20/2011 1.35 46.7 0.005 24 108 1.9 16.6 8.41 0.06
11/2912011 1.4 19.4 0 >66 1270 1.10 386 11.80 0.05
Parameter, (units)
Total Non-Polar
Rainfall, Methanol Hexamine Formaldehyde Total Copper Total Zinc Total Lead Oil& Grease pH
inches mg1L mg/L mg/L mg/L mg/L mg/L mg/L S.U.
Benchmark N/A 7700 25,000 0.5 0.007 0.067 0.03 15 6 - 9
Date Sample
Collected,
mmlddlyy
01/17/2011 0.31 96.6 858 41.2 0.49 0.897 <0.010 <5 7.86
04/05/2011 0.33 26.7 52.8 107 0.525 0.999 0.014 <5 7.07
09/20/2011 1.35 <10 <10 17.5 0.093 0.217 <0.010 <5 7.43
11/29/2011 1.4 <10 <10 23.00 0.062 0.243 <0.010 <5 7.03
SWU-264-Generic-25May2010

SWIG-264-Generic-25May2010 i

Outfall No. �005
Is this outfall currently in Tier 2 (monitored monthly)? Yes ❑ No
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes ❑ No
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No
Parameter, (units)
Total TSS TRC BOD COD NH3 TKN NO3+NO2 Total
Rainfall, Phosphorus
inches mglL mglL mglL mglL mglL mglL mgll_ mg/L
Benchmark N/A 100 0.028 30 120 7.2 20 10 2
Date Sample
Collected,
mm/dd/yy
01/17/2011 0.31 123 0 42 155 8.10 7.5 0.66 0.40
04/05/2011 0.33 41.3 0.003 45 167 1.9 29.7 1.48 0.17
09/20/2011 1.35 24.6 0.025 8 66 0.30 1.8 0.72 0.34
11/29/2011 1.4 11.9 0 7 37 0.40 2 0.5 0.15
SWII-264-Generic-25May2010

Outfall No. _006
Is this outfall currently in Tier 2 (monitored monthly)? Yes ❑ No
Was this outfall ever in Tier 2 (monitored monthly) during the past year? Yes ❑ No
If this outfall was in Tier 2 last year, why was monthly monitoring discontinued?
Enough consecutive samples below benchmarks to decrease frequency ❑
Received approval from DWQ to reduce monitoring frequency ❑
Other ❑
Was this SDO monitored because of vehicle maintenance activities? Yes ❑ No
Parameter, (units)
Total Non-Polar
Rainfall, Methanol Hexamine Formaldehyde Total Copper Total Zinc Total Lead Oil &Grease pH
inches mg/L mg1L mgll_ mg/L mg/L mg/L mg/L S.U.
Benchmark N/A 7700 25,000 0.5 0.007 0.067 0.03 15 6-9
Date Sample
Collected,
mmlddlyy
01/17/2011 0.31 <10 <10.0 10.100 0.249 1.04 <0.010 <5 7.27
04/05/2011 0.33 <10 <10 2.460 0.955 1.01 0.011 <5 4.7
09/20/2011 1.35 <10 <10 0.260 0.11 0.255 <0.010 <5 8.21
11/29/2011 1.4 <10 <10 0.200 0.038 0.194 <0.010 <5 7.89
SW U-264-Generic-25May2010

SIL..AR LLC
ISO 9001:2000 Certified
January 26, 2011
Division of Water Quality
Water Quality Section
ATTN: Central Files
1617 Mail Service Center
Raleigh,NC 27699-1617
RE: 4"'Quarter Discharge Monitoring Report 2010
To Whom It May Concern:
The discharge monitoring report(DMR)for fourth quarter 2010 was not completed per the
requirements of Stormwater Permit#NCS000533. During the fourth quarter, Silar LLC failed to
collect quarterly stormwater discharge samples. This letter summarizes corrective actions Silar
LLC is taking to address this permit deviation.
In the fourth quarter of 2010, Silar LLC failed to collect the required quarterly samples. There
are several factors that contributed to this permit deviation. The hold times for some of the
parameters listed in the permit only allow the Site to collect samples Monday through
Wednesday. The representative rain events that occurred in the fourth quarter occurred during
times when wastewater operation was not onsite to collect the samples, the event occurred outside
the allowable hold time, or was not a representative rain event. The final precipitation received
for the quarter was in the form of snow. In response to this permit deviation, Silar LLC has made
changes to its' wastewater operator coverage to allow for second shift coverage Monday through
Friday. A procedure is also in place where the area forecast is reviewed daily by the EHS Leader
and the Operator Responsible in Charge(ORC)so that potential opportunities for sampling can
be identified and schedule adjustments made as needed to fulfill the permit sampling
requirements.
If you have any questions regarding this submittal, please contact Pete Yurgel at 910-655-4212,
extension 100.
Regards,
Silar LLC
333 Neils Eddy Road
Riegelwood,NC 28456
Peter R. Yurgel
Plant Manager