NC0024970_Permit Issuance_20060717

NPDES DOCUHENT SCANNING COVER SHEET
NC0024970
McAlpine Creek WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Draft Permit
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
July 17, 2006
This document is printed on reuse paper. - ignore any
content on the reYerse side

ATA
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Michael F. Easley, Govemor William G. Ross, Jr., Secretary
Alan W. Klimek, P.E., Director
July 17, 2006
Ms. Jacqueline Jarrell, P.E.
Charlotte Mecklenburg Utility Department
4000 Westmont Drive
Charlotte, North Carolina 28217
Subject: Issuance of NPDES Permit NC0024970
McAlpine Creek WWMF
Mecklenburg County
Dear Ms. Jarrell:
Division personnel have reviewed and approved your application for renewal of the, subject
permit. Accordingly, we are forwarding the attached NPDES discharge permit. This permit is
issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the
Memorandum of Agreement between North Carolina and the U.S. Environmental Protection
Agency dated May 9, 1994 (or as subsequently amended).
This final permit contains the following significant changes from the draft you were
sent on May 24, 2006:
> A Total Phosphorus monthly average limit of 1,067 lbslday has been added to the
permit, as required by 2002 Settlement agreement between CMUD, SC DHEC, and
the Division. The combined 12-month rolling average limit for McAlpine Creek
WWMF, Sugar Creek WWMF, and Irwin Creek WWMF is still required.
> Monthly hardness monitoring is being required at instream stations IC1, MC2, SC4,
LSC1, and LSC2 to coincide with existing copper and zinc monitoring requirements.
> A daily maximum fecal coliform limit has been added to the permit to align with
South Carolina standards. This limit will take effect in six months (February 1,
2007).
If any parts, measurement frequencies or sampling requirements contained in this permit
are unacceptable to you, you have the right to an adjudicatory hearing upon written request
within thirty (30) days following receipt of this letter. This request must be in the form of a
written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed
with the Office of Administrative Hearings (6714 Mail Service Center, Raleigh, North Carolina
27699-6714). Unless such demand is made, this decision shall be final and binding.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Telephone [phone] FAX [phone]
512 N. Salisbury Street, Raleigh, North Carolina 27604 On the Internet at http://h2o.enr.state.nc.us/
An Equal Opportunity/Affirmative Action Employer
Na"`NCarolina
atural

NPDES Permit Issuance
Permit # NC0024970
McAlpine Creek WWMF
Please note that this permit is not transferable except after notice to the Division. The
Division may require modification or revocation and reissuance of the permit. This permit does
not affect the legal requirements to obtain other permits which may be required by the Division
of Water Quality or permits required by the Division of Land Resources, the Coastal Area
Management Act or any other Federal or Local governmental permit that may be required.
If you have any questions concerning this permit, please contact Toya Fields at telephone
number [phone], extension 551.
Sincerely,
vAlan W. Klimek, P.E.
cc: Central Files
Mooresville Regional Office, Surface Water Protection
NPDES file
Aquatic Toxicology Unit
Marshall Hyatt, EPA Region IV
Mecklenburg County DEP
Mike Montebello, South Carolina DHEC
2

Permit NC0024970
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards and
regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the
Federal Water Pollution Control Act, as amended, the
Charlotte -Mecklenburg Utility Department
is hereby authorized to discharge wastewater from a facility located at the
McAlpine Creek Wastewater Management Facility
US. a l Z?o1
1 Nf.-uk,
Mecklenburg County
to receiving waters designated as McAlpine Creek in the Catawba River Basin in accordance
with effluent limitations, monitoring requirements, and other conditions set forth in Parts I,
II, III and IV hereof.
This permit shall become effective September 1, 2006.
This permit and authorization to discharge shall expire at midnight on February 28, 2011.
Signed this day July 17, 2006.
. Alan. W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission

r �
Permit NC004970
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked. As of this permit
issuance, any previously issued permit bearing this number is no longer effective. Therefore, the exclusive authority to
operate and discharge from this facility arises under the permit conditions, requirements, terms, and provisions included
herein.
The Charlotte -Mecklenburg Utility Department is hereby authorized to:
1. Continue to operate the existing 64.0 MGD wastewater treatment facility consisting of:
• Flow equalization
• Screening
• Grit removal
• Primary clarifiers
• Aeration basins
• Secondary clarifiers
• Chlorination
• Dechlorination
• Anaerobic sludge digestion
• Centrifuges and gravity sludge thickeners
• Rapid sand filter
Located at the McAlpine Creek Wastewater Management Facility, on US Highway
521, south of Charlotte in Mecklenburg County.
2. Discharge from said treatment works at the location specified on the attached map into
McAlpine Creek, which is classified C waters in the Catawba River Basin.
NPDES Permit Part I - Page 2 of 2

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McAlpine Creek WWMF — NC0024970
USGS Quad Name: Weddington
Receiving Stream: McAlpine Creek
Stream Class: C
Subbasin: Catawba — 03-08-34
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Long.: 80°5221"
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Permit NC0024970
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on September 1, 2006 and lasting until expiration, the Permittee is authorized to discharge
from outfall 001. Such discharges shall be limited and monitored by the Permittee as specified below:
PARAMETER
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Locations
Flow
64.0 MGD
Continuous
Recording
I or E
CBOD, 5-day (20°C)2
April 1- October 31
4.0 mg/L
6.0 mg/L
Daily
Composite
E, I
CBOD, 5-day (20°C)2
November 1- March 31
8.0 mg/L
12.0 mg/L
Daily
Composite
E, I
Total Suspended Solids2
15.0 mg/L
22.5 mg/L
Daily
Composite
E, I
NH3 as N
(April 1- October 31)
1.0 mg/L
3.0 mg/L
Daily
Composite
E
NH3 as N
(November 1-March 31)
1.9 mg/L
5.7 mg/L
Daily
Composite
E
Fecal Coliform
(geometric mean)
200 / 100 ml
400 / 100 ml
1000 / 100 miK
Daily
Grab
E
pH
Between 6.0 and 9.0 s.u.
Daily
Grab
E
Dissolved Oxygen3
Daily
Grab
E, U, D
Conductivity
Daily
Grab
E, U, D
Temperature (°C)
Daily
Grab
E, U, D
Total Residual Chlorine4
17 pg/L
Daily
Grab
E
Total Selenium
5 µg/L
Weekly
Composite
E
Total Nitrogen
(NO2 + NO3 + TKN)
Monthly
Composite
E
Total Phosphorus5
1,067 lbs/day
Monthly
Composite
E
Chronic Toxicity6
Quarterly
Composite
E
Priority Pollutant Scan7
Annual
Grab
E
Footnotes:
1. Sample Locations: E - Effluent, I - Influent, U - Upstream, D- Downstream. For instream monitoring requirements, see
Parts A. (6.)- A.(9.).
2. The monthly average effluent CBOD5 and total suspended solids concentrations shall not exceed 15% of the respective
influent value.
3. The daily average dissolved oxygen effluent concentrations shall not be less than 6.0 mg/L.
4. The daily average limit for total residual chlorine shall be 28 µg/L.
5. The three CMUD plants (McAlpine, Irwin and Sugar Creek WWTPs) shall have a combined 12-month rolling
average phosphorus limit of 823 lbs/day. See Part A. (2.). for additional information on this limit. Part A. (3.)
describes the methodology for calculation of the monthly average and 12-month limits.
6. Whole effluent toxicity shall be measured by Chronic Toxicity (Ceriodaphnia) P/F at 90 %. Samples shall be taken
quarterly during the months of March, June, September and December. See Part A. (4).
7. See Special Conditions A(5) of the Supplement to Effluent Limitations.
8. __fie daily maximum f ca-l-eo ohm-1 mii� hail taake effect.Marth_1; 20Q7:
There shall be no discharge of floating solids or foam visible in other than trace amounts.
NPDES Permit Part I - Page 3 of 3

Permit NC0024970
A. (2) TOTAL PHOSPHORUS LIMIT
As stipulated by the 2002 Settlement Agreement between Charlotte -Mecklenburg Utilities
Department (CMUD), the South Carolina Department of Health and Environmental Control (SC
DHEC) and the North Carolina Division of Water Quality (NC-DWQ), CMUD's McAlpine Creek
WWMF, Sugar Creek WWTP and Irwin Creek WWTP must comply with a combined 12 month
rolling average limit of 826.0 lbs/day as of February 28, 2006. This limit is defined as an effluent limit
for total phosphorus from the total combined discharge from the three referenced CMUD wastewater
treatment plants (based on a 12-month rolling average). The methodology for calculating the annual
average is described in Part A. (3.).
A. (3) TOTAL PHOSPHORUS MONITORING
The Permittee shall calculate a 12-month rolling average mass loading as the sum of monthly
Loadings, according to the following equations:
(1) Monthly Average (lbs./day) = TP x Qw x 8.34
Where:
TP = the arithmetic average of total phosphorus concentrations (mg/L) obtained via composite
samples (either daily, weekly, or monthly average values) collected during the month
Qw = the average daily waste flow (MGD) for the month
8.34= conversion factor, from (mg/L x MGD) to pounds
The 12-month rolling average mass loading is defined as the sum of the monthly average loadings for
the previous 12 months inclusive of the reporting month:
12
(2) 12-Month Mass Loading (pounds/day)= >TPma =12 (inclusive of reporting month)
Where:
TPma is defined as the total phosphorus monthly average mass loading (calculated above).
The monthly average and 12-month average mass loadings shall be reported on the attached
worksheet and submitted with the discharge monitoring report for McAlpine Creek WWMF. The
first worksheet is due with the discharge monitoring report, 12 months from the effective date of the
total phosphorus limit (referenced in Special Condition A. (2)). In the interim period between the
effective date and the requirement to submit the attached worksheet, the total phosphorus monthly
average mass loadings should be reported on the discharge monitoring report for the respective
facility.
The Permittee shall report the total phosphorus concentration for each sample on the appropriate
discharge monitoring report for each facility. Reporting of and compliance with the phosphorus limit
shall be done on a monthly basis.
NPDES Permit Part I - Page 4 of 4

Permit NC0024970
A. (4) CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 90%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the "North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent versions or
"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent
versions. The tests will be performed during the months of March, June, September, and December. Effluent sampling
for this testing shall be performed at the NPDES permitted final effluent. discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit limit,
then multiple -concentration testing shall be performed at a minimum, in each of the two following months as
described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or
subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the highest
concentration having no detectable impairment of reproduction or survival and the lowest concentration that does
have a detectable impairment of reproduction or survival. The definition of "detectable impairment," collection
methods, exposure regimes, and further statistical methods are specified in the "North Carolina Phase II Chronic
Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions. •
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for the
pass/fail results and THP3B for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to the
following address:
Attention: North Carolina Division of Water Quality
Environmental Sciences Section
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Section no later than 30 days
after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, indude all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature.
Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the
permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the facility
name, permit number, pipe number, county, and the month/year of the report with the notation of "No Flow" in the
comment area of the form. The report shall be submitted to the Environmental Sciences Section at the address cited
above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be
required during the following month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water
Quality indicate potential impacts to the receiving stream, this permit may be re -opened and modified to include
alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism
survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute an
invalid test and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring.
NPDES Permit Part I - Page 5 of 5

Permit NC0024970
A. (5) IRWIN CREEK MONITORING REQUIREMENTS
During the period beginning on September 1, 2006 and lasting until expiration, the Permittee shall monitor
Irwin Creek as specified below:
STATIO?
ID
LOCATION
PARAMETER
MONITORING
REQUIREMENTS
Measurement
Frequency
Sample
Type
IC1
Irwin Creek - Upstream of Irwin Creek WWTP
Dissolved Oxygen
Variables
Grab
IC1
Irwin Creek - Upstream of Irwin Creek WWTP
Temperature
Variables
Grab
IC1
Irwin Creek - Upstream of Irwin Creek WWTP
Conductivity
Variables
Grab
IC1
Irwin Creek - Upstream of Irwin Creek WWTP
Chromium
Monthly
Grab
IC1
Irwin Creek - Upstream of Irwin Creek WWTP
Total copper
Monthly
Grab
IC1
Irwin Creek - Upstream of Irwin Creek WWTP
Total zinc
Monthly
Grab
IC1
Irwin Creek - Upstream of Irwin Creek WWTP
Hardness
Monthly
Grab
Footnotes:
1. Variable = Weekly (June 1- September 30) and monthly (October 1- May 31)
It is recommended that instream monitoring for stations IC1, SC1, SC2, SC3, SC4, SC5, LSC1, MC1
and MC2 be conducted during the same day or on consecutive days.
Instream monitoring requirements for McAlpine Creek WWMF, Irwin Creek WWTP and Sugar
Creek WWTP are identical. Please submit all instream monitoring results along with the McAlpine
Creek WWMF Discharge Monitoring Reports.
NPDES Permit Part I - Page 6 of 6

Permit NC0024970
A. (6) MCALPINE CREEK MONITORING REQUIREMENTS
During the period beginning on September 1, 2006 and lasting until expiration, the Permittee shall monitor
McAlpine Creek as specified below:
STATION
ID
LOCATION
PARAMETER
Measurement
Sample
Frequency
Type
MC1
McAlpine Creek - Upstream of McAlpine
Creek WWTP
Dissolved Oxygen
Variable'
Grab
MC1
McAlpine Creek - Upstream of McAlpine
Creek WWTP
Temperature
Variable'
Grab
MC1
McAlpine Creek - Upstream of McAlpine
Creek WWTP
Conductivity
Variable'
Grab
MC1
McAlpine Creek - Upstream of McAlpine
Creek WWTP
Chromium
Monthly
Grab
MC1
McAlpine Creek - Upstream of McAlpine
Creek WWTP
Total copper
Monthly
Grab
MC1
McAlpine Creek - Upstream of McAlpine
Creek WWTP
Total zinc
Monthly
Grab
MC1
McAlpine Creek - Upstream of McAlpine
Creek WWTP
Hardness
Monthly
Grab
MC2
McAlpine Creek downstream of confluence
with McMullen Creek at SC2964
Dissolved Oxygen
Variable'
Grab
MC2
McAlpine Creek downstream of confluence
with McMullen Creek at SC2964
Temperature
Variable'
Grab
MC2
McAlpine Creek downstream of confluence
with McMullen Creek at SC2964
Conductivity
Variable'
Grab
MC2
McAlpine Creek downstream of confluence
with McMullen Creek at SC2964
Chromium
Monthly
Grab
MC2
McAlpine Creek downstream of confluence
with McMullen Creek at SC2964
Total copper
Monthly
Grab
MC2
McAlpine Creek downstream of confluence
with McMullen Creek at SC2964
Total zinc
Monthly
Grab
MC2
McAlpine Creek downstream of confluence
with McMullen Creek at SC2964
Hardness
Monthly
Grab
Footnotes:
1. Variable = Weekly (June 1- September 30) and monthly (October 1- May 31)
It is recommended that instream monitoring for stations IC1, SC1, SC2, SC3, SC4, SC5, LSC1, MC1
and MC2 be conducted during the same day or on consecutive days.
Instream monitoring requirements for McAlpine Creek WWMF, Irwin Creek WWTP and Sugar
Creek WWTP are identical. Please submit all instream monitoring results along with the McAlpine
Creek WWMF Discharge Monitoring Reports.
NPDES Permit Part I - Page 7 of 7

Permit NC0024970
A. (7) SUGAR CREEK MONITORING REQUIREMENTS
During the period beginning on September 1, 2006 and lasting until expiration, the Permittee shall monitor
Sugar Creek as specified below:
STATIOt
ID
LOCATION
[ALL SITES ARE IN SUGAR CREEK]
PARAMETER
Measurement
Frequency
Sample
Type
SC1
Downstream of confluence with Irwin Creek at Yorkmont Road
Dissolved Oxygen
Variable'
Grab
SC1
Downstream of confluence with Irwin Creek at Yorkmont Road
Temperature
Variable1
Grab
SC1
Downstream of confluence with Irwin Creek at Yorkmont Road
Conductivity
Variable1
Grab
SC2
Downstream of confluence with Irwin Creek at Arrowhead Road
Dissolved Oxygen
Variable'
Grab
SC2
Downstream of confluence with Irwin Creek at Arrowhead Road
Temperature
Variable1
Grab
SC2
Downstream of confluence with Irwin Creek at Arrowhead Road
Conductivity
Variable1
Grab
SC3
Downstream of confluence with Irwin Creek at Nations Ford
Road
Dissolved Oxygen
Variable1
Grab
SC3
Downstream of confluence with Irwin Creek at Nations Ford
Road
Temperature
Variable1
Grab
SC3
Downstream of confluence with Irwin Creek at Nations Ford
Road
Conductivity
Variable1
Grab
SC4
Downstream of confluence with Irwin Creek at Route 51
Dissolved Oxygen
Variable1
Grab
SC4
Downstream of confluence with Irwin Creek at Route 51
Temperature
Variable1
Grab
SC4
Downstream of confluence with Irwin Creek at Route 51
Conductivity
Variable1
Grab
SC4
Downstream of confluence with Irwin Creek at Route 51
Chromium
Monthly
Grab
SC4
Downstream of confluence with Irwin Creek at Route 51
Total copper
Monthly
Grab
SC4
Downstream of confluence with Irwin Creek at Route 51
Total zinc
Monthly
Grab
SC4
Downstream of confluence with Irwin Creek at Route 51
Hardness
Monthly
Grab
SC5
Downstream of confluence with McAlpine Creek at Route 160
Dissolved Oxygen
Variable1
Grab
SC5
Downstream of confluence with McAlpine Creek at Route 160
Temperature
Variable1
Grab
SC5
Downstream of confluence with McAlpine Creek at Route 160
Conductivity
Variable1
Grab
SC5
Downstream of confluence with McAlpine Creek at Route 160
pH
Variable1
Grab
SC5
Downstream of confluence with McAlpine Creek at Route 160
Ammonia (NH3-N)
Weekly
Grab
SC5
Downstream of confluence with McAlpine Creek at Route 160
Nitrate/Nitrite (NOX)
Weekly
Grab
SC5
Downstream of confluence with McAlpine Creek at Route 160
Total Kjeldahl
Nitrogen (TKN)
Weekly
Grab
SC5
Downstream of confluence with McAlpine Creek at Route 160
Total Phosphorus
Weekly
Grab
SC5
Downstream of confluence with McAlpine Creek at Route 160
Orthophosphate
Weekly
Grab
Footnotes:
1. Variable = Weekly (June 1- Sept 30) and monthly (Oct 1- May 31)
It is recommended that instream monitoring for stations IC1, SC1, SC2, SC3, SC4, SC5, LSC1, MC1
and MC2 be conducted during the same day or on consecutive days.
Instream monitoring requirements for McAlpine Creek WWMF, Irwin Creek WWTP and Sugar
Creek WWTP are identical. Please submit all instream monitoring results along with the McAlpine
Creek WWMF Discharge Monitoring Reports.
NPDES Permit Part I — Page 8 of 8

Permit NC0024970
A. (8) LITTLE SUGAR CREEK MONITORING REQUIREMENTS
During the period beginning on September 1, 2006 and lasting until expiration, the Permittee shall monitor Little
Sugar Creek as specified below:
STATIOIt
ID
LOCATION
PARAMETER
Measurement
Sample
Frequency
Type
LSC1
Little Sugar Creek upstream of Sugar Creek
WWTP
Dissolved Oxygen
Variable"
Grab
LSC1
Little Sugar Creek upstream of Sugar Creek
WWTP
Temperature
Variable"
Grab
LSC1
Little Sugar Creek upstream of Sugar Creek
WWTP
Conductivity
Variable"
Grab
LSC1
Little Sugar Creek upstream of Sugar Creek
WWTP
Total copper
Monthly
Grab
LSC1
Little Sugar Creek upstream of Sugar Creek
WWTP
Total zinc
Monthly
Grab
ISC1
Little Sugar Creek upstream of Sugar Creek
WWTP
Hardness
Monthly
Grab
LSC3
Little Sugar Creek downstream of Sugar Creek
WWTP at Route 51
Dissolved Oxygen
Variable".
Grab
LSC3
Little Sugar Creek downstream of Sugar Creek
WWTP at Route 51
Temperature
Variable"
Grab
LSC3
Little Sugar Creek downstream of Sugar Creek '
WWTP at Route 51
Conductivity
Variable"
Grab
LSC3
Little Sugar Creek downstream of Sugar Creek
WWTP at Route 51
Chromium
Monthly
Grab
LSC3
Little Sugar Creek downstream of Sugar Creek
WWTP at Route 51
Total copper
Monthly
Grab
LSC3
Little Sugar Creek downstream of Sugar Creek
WWTP at Route 51
Total zinc
Monthly
Grab
LSC3
Little Sugar Creek downstream of Sugar Creek
WWTP at Route 51
Hardness
Monthly
Grab
Footnotes:
1. Variable = Weekly (June 1- Sept 30) and monthly (Oct 1- May 31)
It is recommended that instream monitoring for stations IC1, SC1, SC2, SC3, SC4, SC5, LSC1, MC1
and MC2 be conducted during the same day or on consecutive days.
Instream monitoring requirements for McAlpine Creek WWMF, Irwin Creek WWTP and Sugar
Creek WWTP are identical. Please submit all instream monitoring results along with the McAlpine
Creek WWMF Discharge Monitoring Reports.
The revised instream monitoring program, no longer requires monitoring of station LSC2. The LSC2
designation continues to refer to the sampling station on Little Sugar Creek downstream of the Sugar
Creek WWTP at Archdale Road; however, this station is inactive.
NPDES Permit Part I - Page 9 of 9

Permit NC0024970
A. (9) EFFLUENT POLLUTANT SCAN
The permittee shall perform an annual Effluent Pollutant Scan for all parameters listed in the table
below (in accordance with 40 CFR Part 136). The annual effluent pollutant scan samples shall
represent seasonal (summer, winter, fall, spring) variations over the 5-year permit cycle. Unless
otherwise indicated, metals shall be analyzed as "total recoverable." Additionally, the method
detection level and the minimum level shall be the most sensitive as provided by the appropriate
analytical procedure.
Ammonia (as N)
Chlorine (total residual, TRC)
Dissolved oxygen
Nitrate/Nitrite
Total Kjeldahl nitrogen
Oil and grease
Total Phosphorus
Total dissolved solids
Hardness
Antimony
Arsenic
Beryllium
Cadmium
Chromium
CoPFer
Lead
Mercury
Nickel
Selenium
Silver
Thallium
Zinc
Cyanide
Total phenolic compounds
Volatile organic compounds:
Acrolein
Acrylonitrile
Benzene
Bromoform
Carbon tetrachloride
Chlorobenzene
Chlorodibromomethane
Chloroethane
2-chloroethylvinyl ether
Chloroform
Didhlorobromomethane
1,1-dichloroethane
1,2-dichloroethane
Trans-1,2-dichloroethylene
1,1-dichloroethylene
1,2-dichloropropane
1,3-dichloropropylene
Ethylbenzene
Methyl bromide
Methyl chloride
Methylene chloride
1,1,2,2 tetrachloroethane
Tetrachloroethylene
Toluene
1,1,1-trichloroethane
1,1,2 trichloroethane
Trichloroethylene
Vinyl chloride
Acid -extractable compounds:
P-chloro-m-cresol
2-chlorophenol
2,4-dichlorophenol
2,4-dimethylphenol
4,6-dinitro-o-cresol
2,4-dinitrophenol
2 nitrophenol
4-nitrophenol .
Pentachlorophenol
Phenol
2,4,6-trichlorophenol
Base -neutral compounds:
Acenaphthene
Acenaphthylene
Anthracene
Benzidine
Benzo(a)anthracene
Benzo(a)pyrene
3,4 benzofluoranthene
Benzo(ghi)perylene
Benzo(k)fluoranthene
Bis (2-chloroethoxy) methane
Bis (2-chloroethyl) ether
Bis (2-chloroisopropyl) ether
Bis (2-ethylhexyl) phthalate
4-bromophenyl phenyl ether
Butyl benzyl phthalate
2-chloronaphthalene
4-chlorophenyl phenyl ether
Chrysene
Di n butyl phthalate
Di-n-octyl phthalate
Dibenzo(a,h)anthracene
1,2-dichlorobenzene
1,3-dichlorobenzene
1,4-dichlorobenzene
3,3-dichlorobenzidine
Diethyl phthalate
Dimethyl phthalate
2,4-dinitrotoluene
26-dinitrotoluene
1,2-diphenylhydrazine
Fluoranthene
Fluorene
Hexachlorobenzene
Hexachlorobutadiene
Hexachlorocydo-pentadiene
Hexachloroethane
Indeno(1,2,3-cd)pyrene
Isophorone
Naphthalene
Nitrobenzene
N-nitrosodi-n-propylamine
N-nitrosodimethylamine
N-nitrosodiphenylamine
Phenanthrene
Pyrene
1,2,4-trichlorobenzene
Test results shall be reported to the Division in DWQ Form- DMR-PPA1 or in a form approved by the
Director, within 90 days of sampling. A copy of the report shall be submitted to Central Files to the
following address: Division of Water Quality, Water Quality Section, 1617 Mail Service Center,
Raleigh, North Carolina 27699-1617.
NPDES Permit Part I - Page 10 of 10

NCDENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
Charlotte Mecklenburg Utilities Department (CMUD)
NC0024970
. u
--lint .f.
Via
�^.1.•
(1.) Facility Name:
McAlpine Creek WWMF
(2.) Permitted Flow MGD):
64 MGD
(6.) County:
Mecklenburg County
Mooresville
(3.) Facility Class:
(4.) Pretreatment Program:
IV
Full
(7.) Regional Office:
(8.) USGS Topo Quad:
G15SE
(5.) Permit Status:
Existing/Renewal (9.) USGS Quad Name:
Weddington
E ^ ��
�k e•
Y. S 2 9
C Q� i 1_iLf
eariifi l acteris S , =7 � Y L1. a .s ti . • _. .... -.. rr'
r - r a J� ,
(1.) Receiving Stream:
McAlpine Creek (7.) Drainage Area (mi2):
92.4
(2.) Sub -basin:
03-08-34 (8.) Summer 7Q10 (cfs):
2
(3.) Stream Assessment Unit:
11-137-9c I (9.) Winter 7Q10 (cfs):
10
C (10.)30Q2(cfs):
13.5
(4.) Stream Classification:
(5.) 303(d) Status:
Listed ! (11.) Average Flow (cfs):
62.4
(6.) 305(b) Status:
Listed (12.) IWC %:
98
Proposed Changes Incorporated into Permit Renewal
• Add weekly average ammonia limits
• Add annual priority pollutant analysis
• Remove limit and monitoring for lindane, chromium, lead, cyanide and mercury due to
lack of reasonable potential for levels of these parameters to cause an exceedance of water
quality standards.
• Remove monitoring requirements for molybdenum and silver due to lack of reasonable
potential for these pollutants to cause an exceedance of water quality standards.
• Copper and zinc monitoring will be removed however these pollutants should continue
to be monitored through the facility's pretreatment program. A selenium limit will be
added, however after 12 months of samples the facility may request to have the limit
removed.
• Add language clarifying phosphorus limit and modifying limit to align with compliance
dates.
Summary
McAlpine Creek WWMF is one of the largest of the five Charlotte -Mecklenburg Utilities
Department (CMUD) plants at a total design flow of 64 MGD. The facility serves 366,000 people
and 23 SIUs in the City of Charlotte, Town of Mint Hill, Town of Matthews, Town of Pineville,
unincorporated areas of Mecklenburg County, and the Six Mile Creek area of Union County. The
McAlpine WWMF also treats overflow from the Irwin Creek WWTP and 1/3 of the industrial
flow from the Sugar Creek WWTP (Sugar Creek treats flows from 12 SIUs). The facility is
required to implement a full LTMP but voluntarily performs monthly monitoring rather than
quarterly.

NPDES Permit Fact Sheet — 05/23/06 CMUD-McAlpine Creek WWMF
Page 2 NC0024970
The entire length of McAlpine Creek is listed on the draft 2006 303(d) list. The creek has overall
impairments for turbidity and fecal coliform standards violations and an aquatic life impairment
for impaired biological integrity. Potential sources are listed as urban runoff and storm sewers.
A TMDL for fecal coliform has been developed for the Greater Sugar Creek Basin, which includes
McAlpine Creek. CMUD samples the WWMF effluent daily and also samples the downstream
site (MC2) weekly for fecal coliform. The sampling at MC2 for fecal is not an NPDES
requirement, however, Charlotte Mecklenburg Utilities agreed to this sampling as part of an
agreement with the Mecklenburg County Storm Water Services. Sampling throughout the basin
is conducted by Storm Water Services.
The McAlpine Creek WWMF is currently undergoing 4 major capital improvement projects.
Phosphorus reduction project. This project resulted from a January 2002 settlement
agreement between CMUD, DWQ, and SCDHEC that allows a total phosphorus
discharge of 1 mg/L. Phosphorus reduction will involve the addition of magnesium
hydroxide, ferric chloride, and polymer to the treatment process and the construction of
anaerobic zones to the numerous aeration basins for biological phosphorus removal.
Various other improvements will also be made to optimize capacity and performance at
the plant. The project was scheduled for completion in February 2006.
II. Consolidated influent pumping facility. The McAlpine Creek WWMF is comprised
of a North and South plant with separate influent pump stations. In this project, a single
pump station will be constructed to combine influent and side -stream flows. A new
relief sewer will also be constructed to eliminate SSOs during wet weather. The relief
sewer will give the plant the ability to treat wet weather flows of up to 109 MGD. This
project is scheduled to be completed in March 2007.
III. Primary treatment improvements. This project will involve additional improvement
to ensure the plant is able to consistently meet the phosphorus limit. It includes
construction and rehabilitation of primary clarifiers and a primary sludge pumping
station, amongst other improvements. This project is scheduled for completion in
February 2007.
IV. Standby generator facilities. Two generator buildings will be constructed and
equipped with three 2700 kVA generators and space for one additional generator. These
generators will provide standby power for the entire plant (rather than only critical
systems). The project was scheduled for completion in December 2005.
Phosphorus
The CMUD plants have a collective phosphorus limit with a compliance date that was previously
determined as follows:
If CMUD conducts construction activities associated with phosphorus removal at either
the Sugar Creek WWTP or the Irwin Creek WWTP, the annual average limit of 826.0
lbs/day (based on the collective discharge from all three plants) shall become effective
February 28, 2007. Said construction activities will also trigger an effluent limit for
total phosphorus for the McAlpine Creek WWTP of 534.0 lbs/day (based on a 12-month
rolling average) as of February 28, 2006 (as stipulated in Part. A. (2.) of NPDES Permit
NC0024970). If however, CMLID decides not to pursue construction activities,
associated with phosphorus removal, at either the Sugar Creek WWTP or the Irwin Creek

NPDES Permit Fact Sheet - 05/23/06 CMUD-McAlpine Creek WWMF
Page 3
WWTP, the total phosphorus annual average limit applicable to the loading from all three
WWTPs, shall become effective on February 28, 2006.
NC0024970
Since CMUD is not constructing phosphorus removal at the Irwin and Sugar Creek plants, the
language will be modified to state that the limit is in effect as of the effective date of this permit.
Compliance Summary
DMR Data Review
Monthly average DMR data was reviewed for the period of January 2003- December 2005. A
summary is provided in Table 1. During this time period the facility experienced average
monthly flows at 76% capacity and maximum monthly average flows at 99% capacity. CMUD
has already submitted a scoping document and a request for speculative limits to the Division for
proposed future flows of 144 MGD for the three CMUD plants combined. This could potentially
result in an expansion to 92 MGD at the McAlpine Creek WWMF.
Table 1: 2003-2005 Monthly Averaee DMR Data Summa
Flow
(MGD)
Temp.
(deg C)
TRC
(ug/L)
CBOD
(mg/L)
NH3-N
(mg/L)
TSS
(mg/L)
3.35
D.O.
(mg/L)
8.30
TN
(mg/L)
14.90
TP
(mg/L)
2.06
Conductivity
488.31
Avg
48.49
21.21
< 10
2.37
0.24
Max
63.35
27.36
< 10
4.70
0.72
6.13
9.50
30.20
3.20
575.38
Min
38.53
14.70
< 10
0.37
0.00
1.61
7.20
6.00
1.02
395.55
Instream Data Review
CMUD is required to perform an array of instream monitoring at and around all three plants. It
appears that this monitoring was historically required because of the poor water quality. The
Sugar Creek watershed (comprised of Irwin Creek, Little Sugar Creek, McAlpine Creek, and
Sugar Creek) collectively drains the metropolitan center of Charlotte. These streams originate in
Charlotte but continue into South Carolina. These monitoring requirements will not be modified
during this permit renewal.
Instream DMR data was reviewed for the period of January 2004-January 2006. Downstream
temperature levels appear to be slightly elevated in the winter, but similar to upstream values in
the summer. Similarly, downstream D.O. levels are slightly depressed in the winter, but
comparable to upstream values in the summer. The lowest observed DO was 5.4 mg/L.
Downstream conductivity was consistently elevated with an average of 211 umhos/cm upstream
versus 367 umhos/cm downstream. pH levels appear similar both upstream and down.
Additional instream data is summarized in Table 2.
Table 2: Summary of 2004-2005 Instream Data for selected varameters
Upstream
Downstream
Nitrate/
nitrite
TKN
Total P
Ortho P
Cr
Cu
Zn
Nitrate/
nitrite
TKN
Total P
Ortho P
Cr
Cu
Zn
Avg
0.5
0.9
0.2
0.0
10.5
6.0
21.0
9.5
1.4
1.2
1.1
6.7
4.1
28.0
Max
1.0
1.8
0.3
0.1
16.0
20.0
42.0
16.0
2.8
3.3
3.0
6.7
6.4
76.0
Min
0.1
0.4
0.1
0.0
5.5
2.0
11.0
1.6
0.6
0.3
0.2
6.7
2.5
14.0

NPDES Permit Fact Sheet — 05/23/06 CMUD-McAlpine Creek WWMF
Page 4 NC0024970
RPA Analysis
RPAs were performed for currently limited parameters (chromium, lindane, cyanide, lead, and
mercury), parameters requiring monitoring in the NPDES permit (copper, silver, zinc and
molybdenum), and parameters requiring monitoring through the LTMP (arsenic, cadmium,
nickel, and selenium)
Lindane was not detected in any of the samples reported from January 2003-December 2005. The
limit and monitoring requirements will be removed from the permit.
Values of chromium, lead, and mercury did not show reasonable potential to exceed applicable
water quality standards. The limits and monitoring requirements for these parameters will be
removed from the permit however they should continue to be monitored through the facility's
LTMP.
Out of 199 samples of cyanide taken, there were only eight reported detections. All 'detections'
were at or below 5 pg/L and the last was reported in August 2004. Since the practical
quantitation level for this pollutant is 10 pg/L, these eight results were also automatically
interpreted by the RPA method as <10 pg/L. Therefore all 199 samples were interpreted as <10
ig/L. With no variance, this dataset yields a multiplication factor of 1 and a "maximum
predicted" of 5 pg/L (1 detection limit). Although the chronic allowable is also 5 pg/L, it would
appear that in this case there are no grounds for interpreting that cyanide is a parameter of
concern. The limit and monitoring requirement will be removed from this permit. This
parameter should continue to be monitored through the LTMP.
Monitoring was required for molybdenum and silver in the previous permit, however data from
the past permit cycle showed no reasonable potential for levels of these parameters to exceed
water quality standards. Therefore monitoring will be removed from this permit.
Calculated allowable limits for copper and zinc were developed for the McAlpine Creek WWTP
based on a methodology already used at the Irwin and Sugar Creek plants. All equations and
parameters are from SC DHEC Water Classifications and Standards and EPA's "The metals
Translator: Guidance for Calculating a Total Recoverable Permit limit from a dissolved
Criterion". Calculations are attached to the RPA documentation for this fact sheet. Based on the
calculated allowable copper and zinc effluent limits, monitoring for both parameters will be
removed from the permit due to lack of reasonable potential to cause an exceedance of applicable
water quality standards. These pollutants will continue to be monitored through the facility's
pretreatment program.
Arsenic, cadmium, and nickel are currently monitored through the LTMP. There was no
reasonable potential for levels of these parameters to cause an exceedance of water quality
standards.
Selenium is also required to be sampled through the facility's LTMP. Although there were only 4
detections out of 114 samples, all four samples were above the allowable concentration. CMUD
reports that they sample both the influent and effluent for 10 metals each week. When selenium
was first detected in their effluent in April 2005, they were able to determine that three S1Us were
discharging selenium at elevated levels. The pretreatment permits for all facilities were reopened
and selenium limits were added. The issue was resolved in 4 weeks and no selenium has been
detected in the influent or effluent since May 10, 2005. A chronic selenium limit of 5 }ig/L will be
placed in the permit, however the facility will be notified that they may petition to have the limit

NPDES Permit Fact Sheet — 05/23/06 CMUD-McAlpine Creek WWMF
Page 5 NC0024970
removed if 12 months of data show there is no reasonable potential for an exceedance of WQ
standards.
WET Test Results
The McAlpine Creek WWMF has a chronic WET limit at 90% effluent toxicity. The facility has
passed 19/20 tests administered since March 2002. The single failure was in December 2004 and
the facility passed the following two consecutive tests.
Correspondence File Review/Compliance History
From January 2002- February 2006 there was only one limit violation (with the exception of the
single WET failure). The monthly average CBOD limit of 4 mg/L was exceeded in July 2005
(reported value of 4.42 mg/L). The facility appears to be very well operated and maintained.
Proposed Schedule for Permit Issuance
Draft Permit to Public Notice: May 10, 2006
Permit Scheduled to Issue: July 10, 2006
State Contact Information
If you have any questions on any of the above information or on the attached permit, please
contact Toya Fields at [phone], extension 551.
Copies of the following are attached to provide further information on the permit development:
• Draft permit
• RPA Summary including copper and zinc limit calculation
NPDES Recommendation by:
r�Signatur ( /
Z
Regional Office Comments:
Date
3-Alo
Regional Recommendation by:
Signature
Regional Supervisor:
Date
Signature Date

REASONABLE POTENTIAL ANALYSIS
McAlpine Creek WWMF
NC0024970
Time Period 2003-2006
Qw(MGD) 64
7Q10S (cfs) 2
7010W (cfs) 10
3002 (cfs) 13.5
Avg. Stream Flow, QA (cfs) 62.4
Reeving Stream McAlpine Creek
WWTP Class IV
!WC (%) 0 7010S 98.024
0 7010W 90.842
3002 88.021
OA 61.386
Stream Class C
Outfall 001
Ow = 64 MGD
PARAMETER
TYPE
(1)
STANDARDS &
CRITERIA (2)
POL
Units
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
NCWQS/
Chroab
14FAV/
Acuten
SDrL MaxP.dCw Nimble LW
Chromium
NC
50
1022
ug/L
159
1
2.7
Acute: 1,022
_ _ .—•___
Chronic: 51
_ _ _ _ ---- —•--- -----•—
Max predicted « allowable
Remove limit, monitoring
Copper
NC
18.4
AL
27.217
ug/L
159
151
9.7•
Acute: 27
_ _ •—___—
Chronic: 18
_•_ _ _•_ _ _ -------- —•—•—
Max predicted < calculated allowable
Remove monitoring
Cyanide
NC
5
N
22
10
ug/L
199
8
5.0
Acute: 22
_ _ •— —
Chronic: 5
_ _ _ _ ------•—•---•-----
All values below 10 ug/L
Remove limit, reduce monitoring
Lead
NC
25
N
34
ug/L
159
1
5.5
Acute: 34
Chronic: •--26
Max predicted «allowable —•---•— - — — -
Remove limit, monitoring
Mercury
NC
12
ng/L
127
121
7.5
Acute: WA
_ _ •—__ • —_
Chronic: 12
_-_ _ _ --- _--------------_
Max predicted < allowable
Remove limit, monkortng
Molybdenum
A
3500
ug/L
159
116
49.9
Acute: WA
.__________________--_____---------_----
Chronic: 3,976
Remove monitoring
Silver
NC
0
AL
1.23
ug/L
159
0
2.5
Acute: 1
_ _ •—___—_
Chronic: 0
_ -----------------_ -_—
No detections
Remove monitoring
Zinc
NC
280
AL
277.85
ug/L
159
158
79.9
Acute: 278
_ _•_ _ __
Chronic: 280
- _ _ _•—•—•—•-----•—•—•—
Max predicted < atiowabto
Max predicted < calculated allowable
Arsenic
C
50
ug/L
114
0
5.4500
Acute: WA
_ __ _ _ _
Chronic: • •81
_ _ _ _ —•—•—•—•—•—•—•—•—•—•— --•
No detections
Monitored through LIMP
Cadmium
NC
2
15
ug/L
114
0
1.1
Acute: 15
_ _
Chronic: --- 2 ---
_ No detections--- ---------------- — ----
Monitored through LTMP
Nickel
NC
88
N
261
ug/L
114
109
26.8
Acute: 281
_ _ ---•—_
Chronic:90
_ _ _ _ _ _ •—•—•---•— - —•—•—
Max prdicted « allowable
Monitored through LTMP
Selenium
NC
5
56
ug/L
114
4
18.9
Acute: 56
_ _
Chronic: •-- 5 --
_ _ _ _ _ _ _ _
Max predicted > chronic allowable• -------------
Add limit and allow submittal or additional data
0
0
WA
Acute: N/A
Ch------ ® Type
-- -—•---•—•—•—•—•—•--- — — — —
0
0
N/A
Acute: N/A
__ __
Chronic::rror 0 Type
------------------•—•—•-------
0
0
WA
Acute: N/A
Chronic: :nor 0 Type
--------------------------
• Legend:
C = Carcinogenic
NC = Non -carcinogenic
A = Aesthetic
•• Freshwater Discharge
24970rpaads, rpa
5/8/2006

NC0024970 - McAlpine Creek RPA - Attachment A
Copper and Zinc Site Specific Criterion and Limit Derivation
The following equations and parameters are from SC DHEC Water Classifications and Standards
and EPA's "The Metals Translator: Guidance for Calculating a Total Recoverable Permit limit
from a Dissolved Criterion" (EPA 823-B-96-007, June 1996)
Hardness -dependent metals criteria may be calculated from the following
CMC (dissolved) = exp {mA [In(hardness)] + bA} (CF)
CCC (dissolved) = exp {mC [In(hardness)] + bC} (CF)
Parameters for Calculating Freshwater Dissolved Metals Criteria That are Hardness -Dependent
Metal mA
Freshwater Conversion
Factors (CF)
bA mC bC Acute Chronic
Copper
Zinc
0.9422 -1.7 0.8545 -1.702 0.96 0.96
0.8473 0.884 0.8473 0.884 0.978 0.986
Dissolved fraction of the metal (fD) based on ambient TSS
fD = (1 l {1+ kP * TSS) where kP = partition coefficient, Umg
Hardness Conversions
TSS Conversion
kP = kP0 * TSSAa
where: kP0 = metal specific partition coefficient at 0 mg/L TSS (Ukg)
kP0 copper = 1.04E+06
kP0 zinc = 1.25E+06
a= metal specific coefficient
a copper =-0.7436
a zinc =-0.7038
COPPER Calculations
ZINC Calculations
CMC (dissolved) = 11.33923
CCC (dissolved) = 7.676851
kP = 0.43895
fD = 0.416623
CMC=CMC (dissolved)1fD
CMC (cu) = 27.21698
CCC=CCC(dissolved)/fD
CCC (cu) = 18.42635
hardness = average of
McAlpine Creek upstream
and downstream data as
submitted by permittee
= 83.5
CMC (dissolved) = 100.5773
CCC (dissolved) = 101.4001
Average TSS as provided
by permittee (mglL)
= 3.19
kP = 0.552513
fD = 0.361989
CMC=CMC (dissolved)/fD
CMC (zn) = 277.8464
CCC=CCC(dissolved)/fD
CCC (zn) = 280.1192

‘41-671-* 4 .0 gd3- 15-1e-6071 frith.6 -Aaohlou INA-A,
6. BUILDING A SPREADSHEET
MODEL
A
s discussed in earlier chapters,
a series of steps must be taken
to implement the dissolved
metals policy, including converting the water
quality criteria from the total recoverable to the
dissolved form, translation from the dissolved
CCC or CMC to the total recoverable metal
concentration in the discharger's waste stream,
calculating the WLA or TMDL, and developing
the permit limit. These steps or calculations are
easily handled using a simple spreadsheet
model. Use of these equations, whether in a
spreadsheet or not, can avoid many common
mistakes.
The following equations may be used to
translate dissolved criteria to total recoverable
permit limits with translators developed
through studies such as those described in
Chapter 5. This model may be used as a static
model with design flow conditions, it may be
used in a continuous mode (i.e.., using daily
flow and other data), or it may be used (with
programs such as @RISK or Crystal Ball) to
perform Monte Carlo analyses. These
calculations do not provide concentration
estimates between the point of discharge and
the point of complete mixing.
The in -stream total recoverable
concentration is estimated by solving the
following equation:
C,=(0 •Q„• C„+Qc•Ce)/(0 •Q„+Qc)
[Eqn 6.1]
where Ct = pollutant concentration at the
edge of the mixing zone,
Q. = upstream flow,
Cu = upstream pollutant
concentration (background),
Q. = effluent flow,
C. = effluent pollutant
concentration, and
27
6 = fraction of flow available for
mixing.
For example, with Eqn 6.1, the
downstream TSS concentration is estimated
from mass balance calculations of upstream
and effluent loadings:
TSS = (6 • Q„ • TSS„ + % co TSS) / (0 • Q„ + Qc)
[Eqn 6.2]
For translators developed from
partitioning equations 16, (Eqn 2.7), the
dissolved in -stream concentration can be
expressed as:
Cd=C,/(1+IS, • TSS) [Eqn 6.3]
By setting the dissolved in -stream
concentration (C d) equal to the dissolved
criterion concentration (C d = CCd) and
rearranging the equation, we can solve for the
in -stream total recoverable concentration (C t )
that equates to a dissolved in -stream
concentration equal to the dissolved criterion.
Note that this corresponds to Eqn 2.5.
Ct = CCd (1+Kp • TSS) [Eqn 6.4]
The total recoverable concentration in
the effluent (Cc') that equates to a dissolved in -
stream concentration which equals the
dissolved criterion in the mixed receiving
waters is calculated by Eqn 6.5. This
represents the maximum release that will still
allow attainment of water quality standards,
16If the translator has been determined directly
from measurements of dissolved and total recoverable
metal in the downstream water, Eqns 6.3 and 6.4 are not be
used. Instead, the dissolved criterion concentration is
divided by fD to calculate C,' which in turn is used in Eqn
6.5.
If the partition coefficient has units of L/kg, then
both Eqns 6.3 and 6.4 contain the term 1 E-6.

that is the maximum WLA or the maximum
TMDL.
C: _(C,' (0•Qu+Q.)-0•Qu•Cu)/Q,
[Eqn 6.5]
Table 4 presents a simple spreadsheet
that utilizes these relationships. Note that the
second equation in the spreadsheet calculates
Kp and the third equation calculates the
associated fD. In studies where the translator is
developed directly as fD, the Kp equation in the
spreadsheet is deleted and f D is changed from
an equation to an input parameter.
Streamix, an EPA developed
spreadsheet application for mixing zone
analyses, has been enhanced to consider metal
partitioning between dissolved and particulate-
sorbed forms. This version, developed for
EXCEL, is called METALMIX and provides
details of mixing between the point of
discharge and the point of complete mix.
Beyond these approaches, EPA's
DYNTOX model (USEPA, 1995c) has been
modified to properly account for the
distribution of metals between dissolved and
particulate-sorbed forms. DYNTOX supports
Continuous Simulation, Monte Carlo, and
Lognormal Probabilistic Analyses
Table 4. Spreadsheet to Calculate Total Recoverable Waste Load Allocation based on Dissolved
Criterion
Jariables:
Input Values:
Du
TSS_u
e
TSS_e
-Iardness u
-lardness e
nixing fraction (theta)
�C d
Cp
D
-iardness mix
TSS_mix
t_prime
;_e_prime
104
325
19
8.75
1845
100
50
0.25
Equations:
=EXP(a*LN(Hardness mix)+b)*conv fact <dissolved criterion concentration>
=2.8*TSS_mix^-0.8 <example only>
=1/(1 + Kp*TSS_mix)
=(theta * Q_u * Hardness_u + Q_e * Hardness_e) / (theta * Q_u + Q_e)
=(theta * Q_u * TSS_u + Q_e * TSS_e) / (theta * Q_u + Q_e)
=CC_d*(1 / fD) <instream total recov conc that equates to dissolved criterion>
=(C t_prime * (theta * Q_u + Q_e) - theta * Q_u * C_u)/ Q_e
<effluent total recov conc resulting in the dissolved criterion in receiving water>
28

REASONABLE POTENTIAL ANALYSIS
Chromium
Copper
Date Data BDL=1/2DL Results
1 1/8/2003 < 5 2.5 Std Dev. 0.3791
2 1/14/2003 < 2 1.0 Mean 2.4195
3 1/21/2003 < 5 2.5 C.V. 0.1567
4 1/28/2003 < 2 1.0 n 159
5 2/6/2003 < 5 2.5
6 2/11/2003 < 5 2.5 Mult Factor = 1.0700
7 2/18/2003 < 5 2.5 Max. Value 2.5 ug/L
8 2/25/2003 < 5 2.5 Max. Pred Cw 2.7 ug/L
9 3/7/2003 < 5 2.5
10 3/11/2003 < 5 2.5
11 3/18/2003 < 5 2.5
12 3/25/2003 < 5 2.5
13 4/5/2003 < 5 2.5
14 4/8/2003 < 5 2.5
15 4/15/2003 < 5 2.5
16 4/22/2003 < 5 2.5
17 4/29/2003 < 5 2.5
18 5/4/2003 < 5 2.5
19 5/13/2003 < 5 2.5
20 5/20/2003 < 5 2.5
21 5/27/2003 < 5 2.5
22 6/2/2003 < 5 2.5
23 6/10/2003 < 5 2.5
24 6/17/2003 < 5 2.5
25 6/24/2003 < 5 2.5
26 8/6/2003 < 5 2.5
27 8/12/2003 < 5 2.5
28 8/19/2003 < 5 2.5
29 8/26/2003 < 5 2.5
30 9/2/2003 < 5 2.5
31 9/3/2003 < 5 2.5
32 9/11/2003 < 5 2.5
33 9/16/2003 < 5 2.5
34 9/23/2003 < 5 2.5
35 9/30/2003 < 5 2.5
36 10/9/2003 < 5 2.5
37 10/14/2003 < 5 2.5
38 10/21/2003 < 5 2.5
39 10/28/2003 < 5 2.5
40 11/6/2003 < 5 2.5
41 11 /8/2003 < 5 2.5
42 11/10/2003 < 5 2.5
43 11/18/2003 < 5 2.5
44 11/25/2003 < 5 2.5
45 12/2/2003 < 5 2.5
46 12/9/2003 < 5 2.5
47 12/14/2003 < 5 2.5
48 12/23/2003 < 5 2.5
49 12/30/2003 < 5 2.5
50 1/5/2004 < 5 2.5
51 1/13/2004 < 5 2.5
52 1/20/2004 < 5 2.5
53 1/27/2004 < 5 2.5
54 2/3/2004 < 5 2.5
55 2/10/2004 < 5 2.5
56 2/17/2004 < 5 2.5
57 2/24/2004 < 5 2.5
58 3/3/2004 < 5 2.5
59 3/9/2004 < 5 2.5
60 3/16/2004 < 5 2.5
61 3/23/2004 < 5 2.5
62 3/30/2004 < 5 2.5
63 4/6/2004 < 1 0.5
64 4/15/2004 < 1 0.5
65 4/20/2004 < 1 0.5
66 4/27/2004 < 1 0.5
67 5/7/2004 < 5 2.5
68 5/11/2004 < 5 2.5
69 5/18/2004 < 5 2.5
Date Data BDL=1/2DL Results
1 1/8/2003 4.8 4.8 Std Dev. 1.1606
2 1/14/2003 5 5.0 Mean 3.7950
3 1/21/2003 3.4 3.4 C.V. 0.3058
4 1/28/2003 3.7 3.7 n 159
5 2/6/2003 5.3 5.3
6 2/11/2003 4.3 4.3 Mult Factor= 1.1400
7 2/18/2003 5.9 5.9 Max. Value 8.5 ug/L
8 2/25/2003 4.6 4.6 Max. Pred Cw 9.7 ug/L
9 3/7/2003 4.1 4.1
10 3/11/2003 4.4 4.4
11 3/18/2003 4.4 4.4
12 3/25/2003 3.5 3.5
13 4/5/2003 5 5.0
14 4/8/2003 5.1 5.1
15 4/15/2003 6.7 6.7
16 4/22/2003 3.9 3.9
17 4/29/2003 3 3.0
18 5/4/2003 3.5 3.5
19 5/13/2003 2.8 2.8
20 5/20/2003 3.4 3.4
21 5/27/2003 2.8 2.8
22 6/2/2003 2.6 2.6
23 6/10/2003 2.4 2.4
24 6/17/2003 3.5 3.5
25 6/24/2003 3.8 3.8
26 8/6/2003 4.9 4.9
27 8/12/2003 4 4.0
28 8/19/2003 4 4.0
29 8/26/2003 4 4.0
30 9/2/2003 2.7 2.7
31 9/3/2003 3.8 3.8
32 9/11/2003 5.1 5.1
33 9/16/2003 3.6 3.6
34 9/23/2003 3.3 3.3
35 9/30/2003 3.2 3.2
36 10/10/2003 5.8 5.8
37 10/14/2003 3.7 3.7
38 10/21/2003 4.7 4.7
39 10/28/2003 3.8 3.8
40 11/6/2003 5.6 5.6
41 11/8/2003 5.2 5.2
42 11/10/2003 4.2 4.2
43 11/18/2003 3.8 3.8
44 11/25/2003 3.7 3.7
45 12/2/2003 3.3 3.3
46 12/9/2003 3.6 3.6
47 12/14/2003 5.6 5.6
48 12/23/2003 4.2 4.2
49 12/30/2003 3.5 3.5
50 1/5/2004 3.3 3.3
51 1/13/2004 3.4 3.4
52 1/20/2004 3.2 3.2
53 1/27/2004 4.7 4.7
54 2/3/2004 2.8 2.8
55 2/10/2004 3.4 3.4
56 2/17/2004 4.3 4.3
57 2/24/2004 3.7 3.7
58 3/3/2004 3 3.0
59 3/9/2004 6.1 6.1
60 3/16/2004 7.8 7.8
61 3/23/2004 8.5 8.5
62 3/30/2004 6.2 6.2
63 4/6/2004 4.7 4.7
64 4/15/2004 4.3 4.3
65 4/20/2004 3.7 3.7
66 4/27/2004 3.6 3.6
67 5/7/2004 5 5.0
68 5/11/2004 3.4 3.4
69 5/18/2004 3.6 3.6
24970rpa.xls, data
- 1 - 5/8/2006

REASONABLE POTENTIAL ANALYSIS
70 5/25/2004 < 5 2.5
71 6/2/2004 0.7 0.7
72 6/12/2004 < 5 2.5
73 6/15/2004 < 5 2.5
74 6/22/2004 < 5 2.5
75 6/29/2004 < 5 2.5
76 7/6/2004 < 5 2.5
77 7/11/2004 < 5 2.5
78 7/20/2004 < 5 2.5
79 7/27/2004 < 5 2.5
80 8/2/2004 < 5 2.5
81 8/10/2004 < 5 2.5
82 8/17/2004 < 5 2.5
83 8/24/2004 < 5 2.5
84 8/31/2004 < 5 2.5
85 9/7/2004 < 5 2.5
86 9/14/2004 < 5 2.5
87 9/21/2004 < 5 2.5
88 9/28/2004 < 5 2.5
89 10/6/2004 < 5 2.5
90 10/12/2004 < 5 2.5
91 10/19/2004 < 5 2.5
92 10/26/2004 < 5 2.5
93 11/2/2004 < 5 2.5
94 11/11/2004 < 5 2.5
95 11/16/2004 < 5 2.5
96 11/23/2004 < 5 2.5
97 11/30/2004 < 5 2.5
98 12/10/2004 < 5 2.5
99 12/14/2004 < 5 2.5
100 12/15/2004 < 5 2.5
101 12/21/2004 < 5 2.5
102 12/28/2004 < 5 2.5
103 1/4/2005 < 5 2.5
104 1 /7/2005 < 5 2.5
105 1/8/2005 < 5 2.5
106 1/11/2005 < 5 2.5
107 1/18/2005 < 5 2.5
108 1/25/2005 < 5 2.5
109 2/1/2005 < 5 2.5
110 2/6/2005 < 5 2.5
111 2/15/2005 < 5 2.5
112 2/22/2005 < 5 2.5
113 3/1/2005 < 5 2.5
114 3/7/2005 < 5 2.5
115 3/15/2005 < 5 2.5
116 3/16/2005 < 5 2.5
117 3/22/2005 < 5 2.5
118 3/29/2005 < 5 2.5
119 4/5/2005 < 5 2.5
120 4/12/2005 < 5 2.5
121 4/19/2005 < 5 2.5
122 4/26/2005 < 5 2.5
123 5/4/2005 < 5 2.5
124 5/10/2005 < 5 2.5
125 5/12/2005 < 5 2.5
126 5/17/2005 < 5 2.5
127 5/24/2005 < 5 2.5
128 5/31/2005 < 5 2.5
129 6/9/2005 < 5 2.5
130 6/14/2005 < 5 2.5
131 6/15/2005 < 5 2.5
132 6/21/2005 < 5 2.5
133 6/28/2005 < 5 2.5
134 7/8/2005 < 5 2.5
135 7/12/2005 < 5 2.5
136 7/19/2005 < 5 2.5
137 7/26/2005 < 5 2.5
138 8/6/2005 < 5 2.5
139 8/9/2005 < 5 2.5
140 8/16/2005 < 5 2.5
141 8/23/2005 < 5 2.5
142 8/30/2005 < 5 2.5
70 5/25/2004 4 4.0
71 6/2/2004 3.2 3.2
72 6/12/2004 2.3 2.3
73 6/15/2004 2.3 2.3
74 6/22/2004 2.4 2.4
75 6/29/2004 2.4 2.4
76 7/6/2004 2.3. 2.3
77 7/11/2004 4.3 4.3
78 7/20/2004 2.1 2.1
79 7/27/2004 2.5 2.5
80 8/2/2004 2.6 2.6
81 8/10/2004 2.5 2.5
82 8/17/2004 2.7 2.7
83 8/24/2004 2.1 2.1
84 8/31/2004 2.5 2.5
85 9/7/2004 2.2 2.2
86 9/14/2004 3.6 3.6
87 9/21/2004 2.1 2.1
88 9/28/2004 2.5 2.5
89 10/6/2004 2.1 2.1
90 10/12/2004 2.1 2.1
91 10/19/2004 < 5 2.5
92 10/26/2004 < 5 2.5
93 11/2/2004 < 5 2.5
94 11/11/2004 2.4 2.4
95 11/16/2004 2.8 2.8
96 11/23/2004 < 5 2.5
97 11/30/2004 < 5 2.5
98 12/10/2004 2.6 2.6
99 12/14/2004 2.9 2.9
100 12/15/2004 2.9 2.9
101 12/21/2004 < 5 2.5
102 12/28/2004 < 5 2.5
103 1/4/2005 2.5 2.5
104 1/7/2005 3.9 3.9
105 1/8/2005 4.2 4.2
106 1/11/2005 3.2 3.2
107 1/18/2005 3.7 3.7
108 1/25/2005 3.5 3.5
109 2/1/2005 3.2 3.2
110 2/6/2005 6.8 6.8
111 2/15/2005 3.9 3.9
112 2/22/2005 4.9 4.9
113 3/1/2005 4.4 4.4
114 3/7/2005 5.5 5.5
115 3/15/2005 5.6 5.6
116 3/16/2005 6.4 6.4
117 3/22/2005 4.2 4.2
118 3/29/2005 4.1 4.1
119 4/5/2005 3.7 3.7
120 4/12/2005 3.2 3.2
121 4/19/2005 5.2 5.2
122 4/26/2005 4.8 4.8
123 5/4/2005 4.5 4.5
124 5/10/2005 4 4.0
125 5/12/2005 4.9 4.9
126 5/17/2005 4.7 4.7
127 5/24/2005 4.2 4.2
128 5/31/2005 < 10 5.0
129 6/9/2005 5.9 5.9
130 6/14/2005 4.3 4.3
131 6/15/2005 4.9 4.9
132 6/21/2005 3.5 3.5
133 6/28/2005 4 4.0
134 7/8/2005 3.6 3.6
135 7/12/2005 2.9 2.9
136 7/19/2005 4.3 4.3
137 7/26/2005 3.6 3.6
138 8/6/2005 4.1 4.1
139 8/9/2005 2.8 2.8
140 8/16/2005 2.4 2.4
141 8/23/2005 2.9 2.9
142 8/30/2005 3.1 3.1
24970rpa.xls, data
- 2 - 5/8/2006

REASONABLE POTENTIAL ANALYSIS
143 9/6/2005 < 5 2.5
144 9/13/2005 < 5 2.5
145 9/20/2005 < 5 2.5
146 9/25/2005 < 5 2.5
147 10/4/2005 < 5 2.5
148 10/10/2005 < 5 2.5
149 10/18/2005 < 5 2.5
150 10/25/2005 < 5 2.5
151 11/1/2005 < 5 2.5
152 11/8/2005 < 5 2.5
153 11/15/2005 < 5 2.5
154 11/22/2005 < 5 2.5
155 11/29/2005 < 5 2.5
156 . 12/7/2005 < 5 2.5
157 12/13/2005 < 5 2.5
158 12/20/2005 < 5 2.5
159 12/28/2005 < 5 2.5
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
143 9/6/2005 3.1 3.1
144 9/13/2005 3.4 3.4
145 9/20/2005 3.7 3.7
146 9/25/2005 3.7 3.7
147 10/4/2005 5.1 5.1
148 10/10/2005 2.3 2.3
149 10/18/2005 3.4 3.4
150 10/25/2005 3.7 3.7
151 11/1/2005 3.4 3.4
152 11/8/2005 3.3 3.3
153 11/15/2005 4.8 4.8
154 11/22/2005 3.4 3.4
155 11/29/2005 4.1 4.1
156 12/7/2005 2.6 2.6
157 12/13/2005 4.1 4.1
158 12/20/2005 3.9 3.9
159 12/28/2005 3.1 3.1
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
24970rpa.xls, data
- 3 - 5/8/2006

REASONABLE POTENTIAL ANALYSIS
Cyanide
Lead
Date Data BDL=1/2DL Results
1 2/17/2004 < 10 5.0 Std Dev. 0.0000
2 2/23/2004 < 10 5.0 Mean 5.0000
3 2/24/2004 < 10 5.0 C.V. 0.0000
4 3/1/2004 < 10 5.0 n 199
5 3/2/2004 < 10 5.0
6 3/8/2004 < 10 5.0 Mult Factor = 1.0000
7 3/9/2004 < 10 5.0 Max. Value 5.0 ug/L
8 3/15/2004 < 10 5.0 Max. Pred Cw 5.0 ug/L
9 3/16/2004 < 10 5.00
10 3/22/2004 < 10 5.00
11 3/23/2004 < 10 5.00
12 3/29/2004 < 10 5.00
13 4/5/2004 < 10 5.00
14 4/7/2004 < 10 5.00
15 4/12/2004 < 10 5.00
16 4/13/2004 < 10 5.00
17 4/19/2004 < 10 5.00
18 4/20/2004 < 10 5.00
19 4/26/2004 < 10 5.00
20 4/27/2004 < 10 5.00
21 5/4/2004 < 10 5.00
22 5/5/2004 < 10 5.00
23 5/7/2004 < 10 5.00
24 5/10/2004 < 10 5.00
25 5/11/2004 < 10 5.00
26 5/17/2004 < 10 5.00
27 5/18/2004 < 10 5.00
28 5/24/2004 < 10 5.00
29 5/25/2004 < 10 5.00
30 6/1/2004 < 10 5.00
31 6/2/2004 2 5.00
32 6/7/2004 < 10 5.00
33 6/8/2004 < 10 5.00
34 6/14/2004 <. 10 5.00
35 6/15/2004 < 10 5.00
36 6/21/2004 < 10 5.00
37 6/22/2004 < 10 5.00
38 6/28/2004 < 10 5.00
39 6/29/2004 < 10 5.00
40 7/6/2004 < 10 5.00
41 7/7/2004 < 10 5.00
42 7/12/2004 < 10 5.00
43 7/13/2004 < 10 5.00
44 7/19/2004 < 10 5.00
45 7/20/2004 5 5.00
46 7/26/2004 4 5.00
47 7/27/2004 < 10 5.00
48 8/3/2004 3 5.00
49 8/4/2004 3 5.00
50 8/9/2004 3 5.00
51 8/10/2004 4 5.00
52 8/16/2004 3 5.00
53 8/17/2004 < 10 5.00
54 8/23/2004 < 10 5.00
55 8/24/2004 < 10 5.00
56 8/30/2004 < 10 5.00
57 8/31/2004 < 10 5.00
58 9/7/2004 < 10 5.00
59 9/8/2004 < 10 5.00
60 9/13/2004 < 10 5.00
61 9/14/2004 < 10 5.00
62 9/20/2004 < 10 5.00
63 9/21/2004 < 10 5.00
64 9/27/2004 < 10 5.00
65 9/28/2004 < 10 5.00
66 10/4/2004 < 10 5.00
67 10/5/2004 < 10 5.00
68 10/11/2004 < 10 5.00
69 10/12/2004 < 10 5.00
Date Data BDL=1/2DL Results
1 1/8/2003 < 5 2.5 Std Dev. 0.2732
2 1/14/2003 < 2 1.0 Mean 2.4981
3 1/21/2003 < 5 2.5 C.V. 0.1093
4 1/28/2003 < 2 1.0 n 159
5 2/6/2003 < 5 2.5
6 2/11/2003 < 5 2.5 Mult Factor = 1.0500
7 2/18/2003 < 5 2.5 Max. Value 5.2 ug/L
8 2/25/2003 < 5 2.5 Max. Pred Cw 5.5 ug/L
9 3/7/2003 < 5 2.5
10 3/11/2003 < 5 2.5
11 3/18/2003 < 5 2.5
12 3/25/2003 < 5 2.5
13 4/5/2003 < 5 2.5
14 4/8/2003 < 5 2.5
15 4/15/2003 < 5 2.5
16 4/22/2003 < 5 2.5
17 4/29/2003 < 5 2.5
18 5/4/2003 < 5 2.5
19 5/13/2003 < 5 2.5
20 5/20/2003 < 5 2.5
21 5/27/2003 < 5 2.5
22 6/2/2003 < 5 2.5
23 6/10/2003 < 5 2.5
24 6/17/2003 < 5 2.5
25 6/24/2003 < 5 2.5
26 8/6/2003 < 5 2.5
27 8/12/2003 < 5 2.5
28 8/19/2003 < 5 2.5
29 8/26/2003 < 5 2.5
30 9/2/2003 < 5 2.5
31 9/3/2003 < 5 2.5
32 9/11/2003 < 5 2.5
33 9/16/2003 < 5 2.5
34 9/23/2003 < 5 2.5
35 9/30/2003 < 5 2.5
36 10/10/2003 < 5 2.5
37 10/14/2003 < 5 2.5
38 10/21/2003 < 5 2.5
39 10/28/2003 < 5 2.5
40 11/6/2003 < 5 2.5
41 11/8/2003 < 5 2.5
42 11/11/2003 < 5 2.5
43 11/18/2003 < 5 2.5
44 11/25/2003 < 5 2.5
45 12/2/2003 < 5 2.5
46 12/9/2003 5.2 5.2
47 12/14/2003 < 5 2.5
48 12/23/2003 < 5 2.5
49 12/30/2003 < 5 2.5
50 1/5/2004 < 5 2.5
51 1/13/2004 < 5 2.5
52 1/20/2004 < 5 2.5
53 1/27/2004 < 5 2.5
54 2/3/2004 < 5 2.5
55 2/10/2004 < 5 2.5
56 2/17/2004 < 5 2.5
57 2/24/2004 < 5 2.5
58 3/3/2004 < 5 2.5
59 3/9/2004 < 5 2.5
60 3/16/2004 < 5 2.5
61 3/23/2004 < 5 2.5
62 3/30/2004 < 5 2.5
63 4/6/2004 < 5 2.5
64 4/15/2004 < 5 2.5
65 4/20/2004 < 5 2.5
66 4/27/2004 < 5 2.5
67 5/7/2004 < 5 2.5
68 5/11/2004 < 5 2.5
69 5/18/2004 < 5 2.5
24970rpa.xls, data
- 4 - 5/8/2006

REASONABLE POTENTIAL ANALYSIS
70 10/18/2004 < 10 5.00
71 10/19/2004 < 10 5.00
72 10/25/2004 < 10 5.00
73 10/26/2004 < 10 5.00
74 11/1/2004 < 10 5.00
75 11 /2/2004 < 10 5.00
76 11/8/2004 < 10 5.00
77 11 /9/2004 < 10 5.00
78 11/15/2004 < 10 5.00
79 11/16/2004 < 10 5.00
80 11/22/2004 < 10 5.00
81 11/23/2004 < 10 5.00
82 11/29/2004 < 10 5.00
83 11/30/2004 < 10 5.00
84 12/6/2004 < 10 5.00
85 12/7/2004 < 10 5.00
86 12/13/2004 < 10 5.00
87 12/14/2004 < 10 5.00
88 12/15/2004 < 10 5.00
89 12/20/2004 < 10 5.00
90 12/21/2004 < 10 5.00
91 12/28/2004 < 10 5.00
92 12/29/2004 < 10 5.00
93 1/3/2005 < 10 5.00
94 1/4/2005 < 10 5.00
95 1/10/2005 < 10 5.00
96 1/11/2005 < 10 5.00
97 1/18/2005 < 10 5.00
98 1/19/2005 < 10 5.00
99 1/24/2005 < 10 5.00
100 1/25/2005 < 10 5.00
101 1/31/2005 < 10 5.00
102 2/1/2005 < 10 5.00
103 2/7/2005 < 10 5.00
104 2/8/2005 < 10 5.00
105 2/14/2005 < 10 5.00
106 2/15/2005 < 10 5.00
107 2/21/2005 < 10 5.00
108 2/22/2005 < 10 5.00
109 2/28/2005 < 10 5.00
110 3/2/2005 < 10 5.00
111 3/7/2005 < 10 5.00
112 3/8/2005 < 10 5.00
113 3/14/2005 < 10 5.00
114 3/15/2005 < 10 5.00
115 3/16/2005 < 10 5.00
116 3/21/2005 < 10 5.00
117 3/22/2005 < 10 5.00
118 3/28/2005 < 10 5.00
119 3/29/2005 < 10 5.00
120 4/4/2005 < 10 5.00
121 4/5/2005 < 10 5.00
122 4/11/2005 < 10 5.00
123 4/12/2005 < 10 5.00
124 4/18/2005 < 10 5.00
125 4/19/2005 < 10 5.00
126 4/25/2005 < 10 5.00
127 4/26/2005 < 10 5.00
128 5/2/2005 < 10 5.00
129 5/3/2005 < 10 5.00
130 5/9/2005 < 10 5.00
131 5/10/2005 < 10 5.00
132 5/13/2005 < 10 5.00
133 5/16/2005 < 10 5.00
134 5/17/2005 < 10 5.00
135 5/23/2005 < 10 5.00
136 5/24/2005 < 10 5.00
137 5/31/2005 < 10 5.00
138 6/1/2005 < 10 5.00
139 6/6/2005 < 10 5.00
140 6/7/2005 < 10 5.00
141 6/13/2005 < 10 5.00
142 6/14/2005 < 10 5.00
70 5/25/2004 < 5 2.5
71 6/2/2004 < 5 2.5
72 6/12/2004 < 5 2.5
73 6/15/2004 < 5 2.5
74 6/22/2004 < 5 2.5
75 6/29/2004 < 5 2.5
76 7/6/2004 < 5 2.5
77 7/11/2004 < 5 2.5
78 7/20/2004 < 5 2.5
79 7/27/2004 < 5 2.5
80 8/2/2004 < 5 2.5
81 8/10/2004 < 5 2.5
82 8/17/2004 < 5 2.5
83 8/24/2004 < 5 2.5
84 8/31/2004 < 5 2.5
85 9/7/2004 < 5 2.5
86 9/14/2004 < 5 2.5
87 9/21/2004 < 5 2.5
88 9/28/2004 < 5 2.5
89 10/6/2004 < 5 2.5
90 10/12/2004 < 5 2.5
91 10/19/2004 < 5 2.5
92 10/26/2004 < 5 2.5
93 11/2/2004 < 5 2.5
94 11/11/2004 < 5 2.5
95 11/16/2004 < 5 2.5
96 11/23/2004 < 5 2.5
97 11/30/2004 < 5 2.5
98 12/10/2004 < 5 2.5
99 12/14/2004 < 5 2.5
100 12/15/2004 < 5 2.5
101 12/21/2004 < 5 2.5
102 12/28/2004 < 5 2.5
103 1/4/2005 < 5 2.5
104 1/7/2005 < 5 2.5
105 1/8/2005 < 5 2.5
106 1/11/2005 < 5 2.5
107 1/18/2005 < 5 2.5
108 1/25/2005 < 5 2.5
109 2/1/2005 < 5 2.5
110 2/6/2005 < 5 2.5
111 2/15/2005 < 5 2.5
112 2/22/2005 < 5 2.5
113 3/1/2005 < 5 2.5
114 3/7/2005 < 5 2.5
115 3/15/2005 < 5 2.5
116 3/16/2005 < 5 2.5
117 3/22/2005 < 5 2.5
118 3/29/2005 < 5 2.5
119 4/5/2005 < 5 2.5
120 4/12/2005 < 5 2.5
121 4/19/2005 < 5 2.5
122 4/26/2005 < 5 2.5
123 5/4/2005 < 5 2.5
124 5/10/2005 < 5 2.5
125 5/12/2005 < 5 2.5
126 5/17/2005 < 5 2.5
127 5/24/2005 < 5 2.5
128 5/31/2005 < 5 2.5
129 6/9/2005 < 5 2.5
130 6/14/2005 < 5 2.5
131 6/15/2005 < 5 2.5
132 6/21/2005 < 5 2.5
133 6/28/2005 < 5 2.5
134 7/8/2005 < 5 2.5
135 7/12/2005 < 5 2.5
136 7/19/2005 < 5 2.5
137 7/26/2005 < 5 2.5
138 8/6/2005 < 5 2.5
139 8/9/2005 < 5 2.5
140 8/16/2005 < 5 2.5
141 8/23/2005 < 5 2.5
142 8/30/2005 < 5 2.5
24970rpa.xls, data
- 5 - 5/8/2006

REASONABLE POTENTIAL ANALYSIS
143 6/15/2005 < 10 5.00
144 6/20/2005 < 10 5.00
145 6/21 /2005 < 10 5.00
146 6/27/2005 < 10 5.00
147 6/28/2005 < 10 5.00
148 7/5/2005 < 10 5.00
149 7/6/2005 < 10 5.00
150 7/11/2005 < 10 5.00
151 7/12/2005 < 10 5.00
152 7/18/2005 < 10 5.00
153 7/19/2005 < 10 5.00
154 7/25/2005 < 10 5.00
155 7/26/2005 < 10 5.00
156 8/1/2005 < 10 5.00
157 8/2/2005 < 10 5.00
158 8/8/2005 < 10 5.00
159 8/9/2005 < 10 5.00
160 8/15/2005 < 10 5.00
161 8/16/2005 < 10 5.00
162 8/22/2005 < 10 5.00
163 8/24/2005 < 10 5.00
164 8/29/2005 < 10 5.00
165 8/30/2005 < 10 5.00
166 9/6/2005 < 10 5.00
167 9/7/2005 < 10 5.00
168 9/12/2005 < 10 5.00
169 9/13/2005 < 10 5.00
170 9/19/2005 < 10 5.00
171 9/20/2005 < 10 5.00
172 9/26/2005 < 10 5.00
173 9/27/2005 < 10 5.00
174 10/3/2005 < 10 5.00
175 10/4/2005 < 10 5.00
176 10/10/2005 < 10 5.00
177 10/11/2005 < 10 5.00
178 10/17/2005 < 10 5.00
179 10/18/2005 < 10 5.00
180 10/24/2005 < 10 5.00
181 10/25/2005 < 10 5.00
182 10/31/2005 < 10 5.00
183 11/1/2005 < 10 5.00
184 11 /7/2005 < 10 5.0
185 11/8/2005 < 10 5.0
186 11/14/2005 < 10 5.0
187 11/15/2005 < 10 5.0
188 11/21/2005 < 10 5.0
189 11/22/2005 < 10 5.0
190 11 /28/2005 < 10 5.0
191 11/29/2005 < 10 5.0
192 12/5/2005 < 10 5.0
193 12/6/2005 < 10 5.0
194 12/12/2005 < 10 5.0
195 12/13/2005 < 10 5.0
196 12/19/2005 < 10 5.0
197 12/20/2005 < 10 5.0
198 12/27/2005 < 10 5.0
199 12/28/2005 < 10 5.0
200
143 9/6/2005 < 5 2.5
144 9/13/2005 < 5 2.5
145 9/20/2005 < 5 2.5
146 9/25/2005 < 5 2.5
147 10/4/2005 < 5 2.5
148 10/10/2005 < 5 2.5
149 10/18/2005 < 5 2.5
150 10/25/2005 < 5 2.5
151 11/1/2005 < 5 2.5
152 11/8/2005 < 5 2.5
153 11/15/2005 < 5 2.5
154 11/22/2005 < 5 2.5
155 11/29/2005 < 5 2.5
156 12/7/2005 < 5 2.5
157 12/13/2005 < 5 2.5
158 12/20/2005 < 5 2.5
159 12/28/2005 < 5 2.5
160
161
162
163
164
165
166
167
168
169
170
171 ,
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
24970rpa.xls, data
- 6 - 5/8/2006

REASONABLE POTENTIAL ANALYSIS
Mercury
Molybdenum
Date Data BDL_1/2DL Results
1 9/2/2003 < 1 0.5 Std Dev. 1.1480
2 9/11/2003 1.1 1.1 Mean 2.6031
3 9/16/2003 1.8 1.8 C.V. 0.4410
4 9/23/2003 2 2.0 n 127
5 9/30/2003 4.3 4.3
6 10/10/2003 1.8 1.8 Mult Factor = 1.2500
7 10/14/2003 1.2 1.2 Max. Value 6.0 ng/L
8 10/21/2003 2.6 2.6 Max. Pred Cw 7.5 ng/L
9 10/28/2003 1.2 1.2
10 11/8/2003 1.6 1.6
11 11/11/2003 1.9 1.9
12 11/18/2003 1.4 1.4
13 11/25/2003 1.7 1.7
14 12/2/2003 1 1.0
15 12/9/2003 2.1 2.1
16 12/14/2003 3.3 3.3
17 12/23/2003 2.3 2.3
18 12/30/2003 2.4 2.4
19 1/5/2004 1.6 1.6
20 1/13/2004 2 2.0
21 1/20/2004 1.8 1.8
22 1/28/2004 1.4 1.4
23 2/3/2004 3.7 3.7
24 2/10/2004 2.4 2.4
25 2/17/2004 2.8 2.8
26 2/25/2004 2.7 2.7
27 3/3/2004 4.2 4.2
28 3/9/2004 < 1 0.5
29 3/16/2004 3.6 3.6
30 3/23/2004 3.2 3.2
31 3/30/2004 2.5 2.5
32 4/6/2004 2.7 2.7
33 4/15/2004 2.5 2.5
34 4/20/2004 2.8 2.8
35 4/28/2004 2.4 2.4
36 5/6/2004 4 4.0
37 5/7/2004 4.7 4.7
38 5/11/2004 2.6 2.6
39 5/18/2004 2.8 2.8
40 5/26/2004 3 3.0
41 6/2/2004 1.5 1.5
42 6/8/2004 1.3 1.3
43 6/12/2004 2.4 2.4
44 6/15/2004 2.2 2.2
45 6/22/2004 < 1 0.5
46 6/29/2004 1.5 1.5
47 7/7/2004 1.3 1.3
48 7/11/2004 1.4 1.4
49 7/20/2004 2.1 2.1
50 7/27/2004 1.5 1.5
51 8/2/2004 < 1 0.5
52 8/11/2004 1.9 1.9
53 8/17/2004 1.9 1.9
54 8/25/2004 1.2 1.2
55 9/1/2004 1.63 1.6
56 9/9/2004 1.46 1.5
57 9/14/2004 1.63 1.6
58 9/21/2004 < 1 0.5
59 9/28/2004 2.56 2.6
60 10/6/2004 1.92 1.9
61 10/13/2004 2.1 2.1
62 10/19/2004 1.8 1.8
63 10/26/2004 1.6 1.6
64 11/2/2004 2 2.0
65 11/11/2004 3.1 3.1
66 11/16/2004 2.7 2.7
67 11/23/2004 2.6 2.6
68 11/30/2004 2.4 2.4
69 12/7/2004 2.6 2.6
Date Data BDL_1/2DL Results
1 1/8/2003 5.5 5.5 Std Dev. 4.0236
2 1/14/2003 6.6 6.6 Mean 6.4912
3 1/21/2003 < 10 5.0 C.V. 0.6198
4 1/28/2003 < 10 5.0 n 159
5 2/6/2003 6.2 6.2
6 2/11/2003 < 5 2.5 Mutt Factor = 1.2800
7 2/18/2003 < 5 2.5 Max. Value 39.0 ug/L
8 2/25/2003 < 5 2.5 Max. Pred Cw 49.9 ug/L
9 3/7/2003 5.2 5.200
10 3/11/2003 6.8 6.800
11 3/18/2003 < 5 2.500
12 3/25/2003 < 5 2.500
13 4/5/2003 8.4 8.400
14 4/8/2003 < 5 2.5
15 4/15/2003 < 5 2.5
16 4/22/2003 < 5 2.5
17 4/29/2003 < 5 2.5
18 5/4/2003 7.5 7.5
19 5/13/2003 5.4 5.4
20 5/20/2003 < 5 2.5
21 5/27/2003 < 5 2.5
22 6/2/2003 5 5.0
23 6/10/2003 5.6 5.6
24 6/17/2003 6.8 6.8
25 6/24/2003 6.2 6.2
26 8/6/2003 8.7 8.7
27 8/12/2003 6.7 6.7
28 8/19/2003 < 10 5.0
29 8/26/2003 < 10 5.0
30 9/2/2003 7.3 7.3
31 9/3/2003 7.3 7.3
32 9/11/2003 6.8 6.8
33 9/16/2003 8 8.0
34 9/23/2003 7.9 7.9
35 9/30/2003 6.3 6.3
36 10/10/2003 7.9 7.9
37 10/14/2003 7.1 7.1
38 10/21/2003 13 13.0
39 10/28/2003 6 6.0
40 11/6/2003 8.9 8.9
41 11/8/2003 8.8 8.8
42 11/11/2003 5.7 5.7
43 11/18/2003 5 5.0
44 11/25/2003 5.4 5.4
45 12/2/2003 5.4 5.4
46 12/9/2003 5.5 5.5
47 12/14/2003 6.2 6.2
48 12/23/2003 < 5 2.5
49 12/30/2003 < 5 2.5
50 1/5/2004 5.7 5.7
51 1/13/2004 6.6 6.6
52 1/20/2004 5.2 5.2
53 1/27/2004 < 5 2.5
54 2/3/2004 5.5 5.5
55 2/10/2004 5.2 5.2
56 2/17/2004 5 5.0
57 2/24/2004 7.4 7.4
58 3/3/2004 5.3 5.3
59 3/9/2004 6.7 6.7
60 3/16/2004 6.3 6.3
61 3/23/2004 6 6.0
62 3/30/2004 6.1 6.1
63 4/6/2004 5.6 5.6
64 4/15/2004 11 11.0
65 4/20/2004 5.8 5.8
66 4/27/2004 7.5 7.5
67 5/7/2004 10 10.0
68 5/11/2004 8.4 8.4
69 5/18/2004 6.5 6.5
24970rpa.xls, data
- 7 - 5/8/2006

REASONABLE POTENTIAL ANALYSIS
70 12/10/2004 3.6 3.6
71 12/14/2004 2 2.0
72 12/21/2004 2.1 2.1
73 12/29/2004 1.8 1.8
74 1/4/2005 2 2.0
75 1/11/2005 1.8 1.8
76 1/18/2005 3 3.0
77 1/25/2005 2.8 2.8
78 2/1/2005 3.2 3.2
79 2/7/2005 2.6 2.6
80 2/15/2005 4 4.0
81 2/22/2005 3.5 3.5
82 3/1/2005 4.4 4.4
83 3/7/2005 2.9 2.9
84 3/15/2005 4.3 4.3
85 3/22/2005 3.6 3.6
86 3/29/2005 4.5 4.5
87 4/5/2005 2.5 2.5
88 4/12/2005 < 1 0.5
89 4/19/2005 2.3 2.3
90 4/26/2005 4 4.0
91 5/4/2005 1.9 1.9
92 5/9/2005 2.7 2.7
93 5/17/2005 3 3.0
94 5/24/2005 2.8 2.8
95 5/31/2005 3.7 3.7
96 6/9/2005 5.7 5.7
97 6/15/2005 3.4 3.4
98 6/21/2005 3.5 3.5
99 6/28/2005 3 3.0
100 7/5/2005 1.9 1.9
101 7/8/2005 2.1 2.1
102 7/13/2005 2 2.0
103 7/19/2005 1.9 1.9
104 7/26/2005 2.2 2.2
105 8/2/2005 3.4 3.4
106 8/5/2005 3.5 3.5
107 8/9/2005 1.9 1.9
108 8/16/2005 2 2.0
109 8/23/2005 2.7 2.7
110 8/30/2005 2 2.0
111 9/7/2005 3 3.0
112 9/12/2005 2 2.0
113 9/20/2005 4 4.0
114 9/27/2005 6 6.0
115 10/3/2005 5 5.0
116 10/11/2005 3 3.0
117 10/18/2005 4 4.0
118 10/25/2005 4 4.0
119 11/1/2005 4 4.0
120 11/8/2005 3 3.0
121 11/15/2005 5 5.0
122 11/22/2005 3 3.0
123 11/29/2005 6 6.0
124 12/7/2005 4 4.0
125 12/13/2005 4 4.0
126 12/20/2005 4 4.0
127 12/28/2005 4 4.0
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
70 5/25/2004 8.1 8.1
71 6/2/2004 10 10.0
72 6/12/2004 12 12.0
73 6/15/2004 8.7 8.7
74 6/22/2004 7.4 7.4
75 6/29/2004 7.1 7.1
76 7/6/2004 6.6 6.6
77 7/11/2004 10 10.0
78 7/20/2004 8.9 8.9
79 7/27/2004 7.9 7.9
80 8/2/2004 8.1 8.1
81 8/10/2004 7.4 7.4
82 8/17/2004 6.7 6.7
83 8/24/2004 7.8 7.8
84 8/31/2004 8.4 8.4
85 9/7/2004 8.3 8.3
86 9/14/2004 7 7.0
87 9/21/2004 19 19.0
88 9/28/2004 6.6 6.6
89 10/6/2004 8.8 8.8
90 10/12/2004 6.9 6.9
91 10/19/2004 < 40 20.0
92 10/26/2004 < 40 20.0
93 11/2/2004 5.2 5.2
94 11/11/2004 8 8.0
95 11/16/2004 < 5 2.5
96 11 /23/2004 < 5 2.5
97 11 /30/2004 < 5 2.5
98 12/10/2004 6.7 6.7
99 12/14/2004 < 5 2.5
100 12/15/2004 6.3 6.3
101 12/21/2004 < 5 2.5
102 12/28/2004 < 5 2.5
103 1/4/2005 < 5 2.5
104 1/7/2005 6.9 6.9
105 1/8/2005 7.8 7.8
106 1/11/2005 < 5 2.5
107 1/18/2005 5.1 5.1
108 1/25/2005 < 5 2.5
109 2/1/2005 < 5 2.5
110 2/6/2005 7 7.0
111 2/15/2005 5.1 5.1
112 2/22/2005 5.2 5.2
113 3/1/2005 < 5 2.5
114 3/7/2005 6.8 6.8
115 3/15/2005 < 5 2.5
116 3/16/2005 8.1 8.1
117 3/22/2005 < 5 2.5
118 3/29/2005 < 5 2.5
119 4/5/2005 5.2 5.2
120 4/12/2005 39 39.0
121 4/19/2005 11 11.0
122 4/26/2005 13 13.0
123 5/4/2005 8.3 8.3
124 5/10/2005 6.1 6.1
125 5/12/2005 7.5 7.5
126 5/17/2005 5.5 5.5
127 5/24/2005 5.3 5.3
128 5/31/2005 < 10 5.0
129 6/9/2005 11 11.0
130 6/14/2005 7.5 7.5
131 6/15/2005 9.4 9.4
132 6/21/2005 7.9 7.9
133 6/28/2005 8.8 8.8
134 7/8/2005 10 10.0
135 7/12/2005 6.4 6.4
136 7/19/2005 6 6.0
137 7/26/2005 6.1 6.1
138 8/6/2005 9.7 9.7
139 8/9/2005 6 6.0
140 8/16/2005 5.2 5.2
141 8/23/2005 9.6 9.6
142 8/30/2005 6.2 6.2
24970rpa.xls, data
- 8 - 5/8/2006

REASONABLE POTENTIAL ANALYSIS
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
9/6/2005 5.7 5.7
9/13/2005 5.3 5.3
9/20/2005 6.4 6.4
9/25/2005 8.8 8.8
10/4/2005 6.5 6.5
10/10/2005 8.5 8.5
10/18/2005 < 5 2.5
10/25/2005 7.1 7.1
11/1/2005 < 5 2.5
11/8/2005 5.4 5.4
11/15/2005 < 5 2.5
11/22/2005 < 5 2.5
11 /29/2005 < 5 2.5
12/7/2005 7.9 7.9
12/13/2005 < 5 2.5
12/20/2005 < 5 2.5
12/28/2005 < 5 2.5
24970rpa.xls, data
• 9 • 5/8/2006

REASONABLE POTENTIAL ANALYSIS
Silver
Zinc
Date Data BDL=1/2DL Results
1 1/8/2003 < 5 2.5 Std Dev. 0.0000
2 1/14/2003 < 5 2.5 Mean 2.5000
3 1/21/2003 < 5 2.5 C.V. 0.0000
4 1/28/2003 < 5 2.5 n 159
5 2/6/2003 < 5 2.5
6 2/11/2003 < 5 2.5 MuIt Factor = 1.0000
7 2/18/2003 < 5 2.5 Max. Value 2.5 ug/L
8 2/25/2003 < 5 2.5 Max. Pred Cw 2.5 ug/L
9 3/7/2003 < 5 2.5
10 3/11/2003 < 5 2.5
11 3/18/2003 < 5 2.5
12 3/25/2003 < 5 2.5
13 4/5/2003 < 5 2.5
14 4/8/2003 < 5 2.5
15 4/15/2003 < 5 2.5
16 4/22/2003 < 5 2.5
17 4/29/2003 < 5 2.5
18 5/4/2003 < 5 2.5
19 5/13/2003 < 5 2.5
20 5/20/2003 < 5 2.5
21 5/27/2003 < 5 2.5
22 6/2/2003 < 5 2.5
23 6/10/2003 < 5 2.5
24 6/17/2003 < 5 2.5
25 6/24/2003 < 5 2.5
26 8/6/2003 < 5 2.5
27 8/12/2003 < 5 2.5
28 8/19/2003 < 5 2.5
29 8/26/2003 < 5 2.5
30 9/2/2003 < 5 2.5
31 9/3/2003 < 5 2.5
32 9/11/2003 < 5 2.5
33 9/16/2003 < 5 2.5
34 9/23/2003 < 5 2.5
35 9/30/2003 < 5 2.5
36 10/10/2003 < 5 2.5
37 10/14/2003 < 5 2.5
38 10/21/2003 < 5 2.5
39 10/28/2003 < 5 2.5
40 11/6/2003 < 5 2.5
41 11/8/2003 < 5 2.5
42 11/11/2003 < 5 2.5
43 11/18/2003 < 5 2.5
44 11/25/2003 < 5 2.5
45 12/2/2003 < 5 2.5
46 12/9/2003 < 5 2.5
47 12/14/2003 < 5 2.5
48 12/23/2003 < 5 2.5
49 12/30/2003 < 5 2.5
50 1/5/2004 < 5 2.5
51 1/13/2004 < 5 2.5
52 1/20/2004 < 5 2.5
53 1/27/2004 < 5 2.5
54 2/3/2004 < 5 2.5
55 2/10/2004 < 5 2.5
56 2/17/2004 < 5 2.5
57 2/24/2004 < 5 2.5
58 3/3/2004 < 5 2.5
59 3/9/2004 < 5 2.5
60 3/16/2004 < 5 2.5
61 3/23/2004 < 5 2.5
62 3/30/2004 < 5 2.5
63 4/6/2004 < 5 2.5
64 4/15/2004 < 5 2.5
65 4/20/2004 < 5 2.5
66 4/27/2004 < 5 2.5
67 5/7/2004 < 5 2.5
68 5/11/2004 < 5 2.5
69 5/18/2004 < 5 2.5
Date Data BDL=1/2DL Results
1 1/8/2003 51 51.0 Std Dev. 9.2922
2 1/14/2003 46 46.0 Mean 36.7421
3 1/21/2003 40 40.0 C.V. 0.2529
4 1/28/2003 40 40.0 n 159
5 2/6/2003 51 51.0
6 2/11/2003 37 37.0 MuIt Factor = 1.1100
7 2/18/2003 38 38.0 Max. Value 72.0 ug/L
8 2/25/2003 40 40.0 Max. Pred Cw 79.9 ug/L
9 3/7/2003 36 36.0
10 3/11/2003 33 33.0
11 3/18/2003 23 23.0
12 3/25/2003 30 30.0
13 4/5/2003 44 44.0
14 4/8/2003 48 48.0
15 4/15/2003 52 52.0
16 4/22/2003 23 23.0
17 4/29/2003 32 32.0
18 5/4/2003 46 46.0
19 5/13/2003 33 33.0
20 5/20/2003 27 27.0
21 5/27/2003 16 16.0
22 6/2/2003 26 26.0
23 6/10/2003 18 18.0
24 6/17/2003 29 29.0
25 6/24/2003 24 24.0
26 8/6/2003 27 27.0
27 8/12/2003 19 19.0
28 8/19/2003 27 27.0
29 8/26/2003 29 29.0
30 9/2/2003 23 23.0
31 9/3/2003 37 37.0
32 9/11/2003 44 44.0
33 9/16/2003 40 40.0
34 9/23/2003 37 37.0
35 9/30/2003 35 35.0
36 10/10/2003 46 46.0
37 10/14/2003 31 31.0
38 10/21/2003 32 32.0
39 10/28/2003 33 33.0
40 11/6/2003 64 64.0
41 11/8/2003 58 58.0
42 11/11/2003 48 48.0
43 11/18/2003 31 31.0
44 11/25/2003 40 40.0
45 12/2/2003 41 41.0
46 12/9/2003 47 47.0
47 12/14/2003 51 51.0
48 12/23/2003 37 37.0
49 12/30/2003 30 30.0
50 1/5/2004 38 38.0
51 1/13/2004 42 42.0
52 1/20/2004 27 27.0
53 1/27/2004 31 31.0
54 2/3/2004 33 33.0
55 2/10/2004 33 33.0
56 2/17/2004 46 46.0
57 2/24/2004 40 40.0
58 3/3/2004 39 39.0
59 3/9/2004 40 40.0
60 3/16/2004 46 46.0
61 3/23/2004 45 45.0
62 3/30/2004 42 42.0
63 4/6/2004 41 41.0
64 4/15/2004 42 42.0
65 4/20/2004 42 42.0
66 4/27/2004 34 34.0
67 5/7/2004 47 47.0
68 5/11/2004 35 35.0
69 5/18/2004 30 30.0
•24970rpa.xls, data
- 10 - 5/8/2006

' REASONABLE POTENTIAL ANALYSIS
70 5/25/2004 < 5 2.5
71 6/2/2004 < 5 2.5
72 6/12/2004 < 5 2.5
73 6/15/2004 < 5 2.5
74 6/22/2004 < 5 2.5
75 6/29/2004 < 5 2.5
76 7/6/2004 < 5 2.5
77 7/11/2004 < 5 2.5
78 7/20/2004 < 5 2.5
79 7/27/2004 < 5 2.5
80 8/2/2004 < 5 2.5
81 8/10/2004 < 5 2.5
82 8/17/2004 < 5 2.5
83 8/24/2004 < 5 2.5
84 8/31/2004 < 5 2.5
85 9/7/2004 < 5 2.5
86 9/14/2004 < 5 2.5
87 9/21/2004 < 5 2.5
88 9/28/2004 < 5 2.5
89 10/6/2004 < 5 2.5
90 10/12/2004 < 5 2.5
91 10/19/2004 < 5 2.5
92 10/26/2004 < 5 2.5
93 11/2/2004 < 5 2.5
94 11/11/2004 < 5 2.5
95 11/16/2004 < 5 2.5
96 11/23/2004 < 5 2.5
97 11/30/2004 < 5 2.5
98 12/10/2004 < 5 2.5
99 12/14/2004 < 5 2.5
100 12/15/2004 < 5 2.5
101 12/21/2004 < 5 2.5
102 12/28/2004 < 5 2.5
103 1/4/2005 < 5 2.5
104 1 /7/2005 < 5 2.5
105 1/8/2005 < 5 2.5
106 1/11/2005 < 5 2.5
107 1/18/2005 < 5 2.5
108 1/25/2005 < 5 2.5
109 2/1/2005 < 5 2.5
110 2/6/2005 < 5 2.5
111 2/15/2005 < 5 2.5
112 2/22/2005 < 5 2.5
113 3/1/2005 < 5 2.5
114 3/7/2005 < 5 2.5
115 3/15/2005 < 5 2.5
116 3/16/2005 < 5 2.5
117 3/22/2005 < 5 2.5
118 3/29/2005 < 5 2.5
119 4/5/2005 < 5 2.5
120 4/12/2005 < 5 2.5
121 4/19/2005 < 5 2.5
122 4/26/2005 < 5 2.5
123 5/4/2005 < 5 2.5
124 5/10/2005 < 5 2.5
125 5/12/2005 < 5 2.5
126 5/17/2005 < 5 2.5
127 5/24/2005 < 5 2.5
128 5/31/2005 < 5 2.5
129 6/9/2005 < 5 2.5
130 6/14/2005 < 5 2.5
131 6/15/2005 < 5 2.5
132 6/21 /2005 < 5 2.5
133 6/28/2005 < 5 2.5
134 7/8/2005 < 5 2.5
135 7/12/2005 < 5 2.5
136 7/19/2005 < 5 2.5
137 7/26/2005 < 5 2.5
138 8/6/2005 < 5 2.5
139 8/9/2005 < 5 2.5
140 8/16/2005 < 5 2.5
141 8/23/2005 < 5 2.5
142 8/30/2005 < 5 2.5
70 5/25/2004 29 29.0
71 6/2/2004 31 31.0
72 6/12/2004 42 42.0
73 6/15/2004 26 26.0
74 6/22/2004 30 30.0
75 6/29/2004 33 33.0
76 7/6/2004 25 25.0
77 7/11/2004 52 52.0
78 7/20/2004 31 31.0
79 7/27/2004 34 34.0
80 8/2/2004 33 33.0
81 8/10/2004 34 34.0
82 8/17/2004 31 31.0
83 8/24/2004 34 34.0
84 8/31/2004 30 30.0
85 9/7/2004 27 27.0
86 9/14/2004 41 41.0
87 9/21/2004 32 32.0
88 9/28/2004 32 32.0
89 10/6/2004 31 31.0
90 10/12/2004 29 29.0
91 10/19/2004 35 35.0
92 10/26/2004 35 35.0
93 11/2/2004 29 29.0
94 11/11/2004 33 33.0
95 11/16/2004 35 35.0
96 11/23/2004 14 14.0
97 11/30/2004 30 30.0
98 12/10/2004 35 35.0
99 12/14/2004 31 31.0
100 12/15/2004 37 37.0
101 12/21 /2004 < 10 5.0
102 12/28/2004 32 32.0
103 1/4/2005 40 40.0
104 1/7/2005 44 44.0
105 1/8/2005 45 45.0
106 1/11/2005 38 38.0
107 1/18/2005 40 40.0
108 1/25/2005 39 39.0
109 2/1/2005 39 39.0
110 2/6/2005 51 51.0
111 2/15/2005 47 47.0
112 2/22/2005 44 44.0
113 3/1/2005 39 39.0
114 3/7/2005 45 45.0
115 3/15/2005 60 60.0
116 3/16/2005 53 53.0
117 3/22/2005 72 72.0
118 3/29/2005 52 52.0
119 4/5/2005 31 31.0
120 4/12/2005 34 34.0
121 4/19/2005 46 46.0
122 4/26/2005 47 47.0
123 5/4/2005 50 50.0
124 5/10/2005 42 42.0
125 5/12/2005 48 48.0
126 5/17/2005 41 41.0
127 5/24/2005 37 37.0
128 5/31/2005 41 41.0
129 6/9/2005 38 38.0
130 6/14/2005 33 33.0
131 6/15/2005 59 59.0
132 6/21/2005 30 30.0
133 6/28/2005 33 33.0
134 7/8/2005 38 38.0
135 7/12/2005 28 28.0
136 7/19/2005 30 30.0
137 7/26/2005 41 41.0
138 8/6/2005 40 40.0
139 8/9/2005 32 32.0
140 8/16/2005 30 30.0
141 8/23/2005 39 39.0
142 8/30/2005 39 39.0
24970tpa.xls, data
- 11 - 5/8/2006

REASONABLE POTENTIAL ANALYSIS
143 9/6/2005 < 5 2.5
144 9/13/2005 < 5 2.5
145 9/20/2005 < 5 2.5
146 9/25/2005 < 5 2.5
147 10/4/2005 < 5 2.5
148 10/10/2005 < 5 2.5
149 10/18/2005 < 5 2.5
150 10/25/2005 < 5 2.5
151 11/1/2005 < 5 2.5
152 11/8/2005 < 5 2.5
153 11/15/2005 < 5 2.5
154 11/22/2005 < 5 2.5
155 11/29/2005 < 5 2.5
156 12/7/2005 < 5 2.5
157 12/13/2005 < 5 2.5
158 12/20/2005 < 5 2.5
159 12/28/2005 < 5 2.5
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
143 9/6/2005 30 30.0
144 9/13/2005 29 29.0
145 9/20/2005 33 33.0
146 9/25/2005 36 36.0
147 10/4/2005 36 36.0
148 10/10/2005 29 29.0
149 10/18/2005 34 34.0
150 10/25/2005 36 36.0
151 11/1/2005 34 34.0
152 11/8/2005 35 35.0
153 11/15/2005 32 32.0
154 11/22/2005 32 32.0
155 11/29/2005 38 38.0
156 12/7/2005 33 33.0
157 12/13/2005 40 40.0
158 12/20/2005 36 36.0
159 12/28/2005 23 23.0
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
24970rpa.xls, data
- 12 - 5/8/2006

REASONABLE POTENTIAL ANALYSIS
Arsenic
Cadmium
Date Data BDL=1/2DL Results
1 12/10/04 < 5 2.5 Std Dev. 0.3667
2 12/14/04 < 5 2.5 Mean 2.4781
3 12/15/04 < 5 2.5 C.V. 0.1480
4 12/21/04 < 5 2.5 n 114
5 12/28/04 < 5 2.5
6 11/2/04 < 5 2.5 Mult Factor = 1.09
7 11/11/04 < 5 2.5 Max. Value 5.0 ug/L
8 11/16/04 < 5 2.5 Max. Pred Cw 5.5 ug/L
9 11/23/04 - < 5.0 2.5
10 11/30/04 < 5.0 2.5
11 10/6/04 < 5.0 2.5
12 10/12/04 < 5.0 2.5
13 10/19/04 : < 5.0 2.5
14 10/26/04 < 5.0 2.5
15 9/7/04 < 5.0 2.5
16 9/14/04 < 5.0 2.5
17 9/21/04 < 5.0 2.5
18 9/28/04 < 5.0 2.5
19 8/2/04 < 5.0 2.5
20 8/10/04 < 5.0 2.5
21 8/17/04 < 5.0 2.5
22 8/24/04 < 5.0 2.5
23 8/31/04 < 5.0 2.5
24 7/6/04 < 5.0 2.5
25 7/11/04 < 5.0 2.5
26 7/20/04 < 5.0 2.5
27 7/27/04 < 5.0 2.5
28 6/2/04 < 3.0 1.5
29 6/12/04 < 5.0 2.5
30 6/15/04 < 5.0 2.5
31 6/22/04 < 5.0 2.5
32 6/29/04 < 5.0 2.5
33 5/7/04 < 5.0 2.5
34 5/10/04 < 5.0 2.5
35 5/18/04 < 5.0 2.5
36 5/25/04 < 5.0 2.5
37 4/6/04 < 5.0 2.5
38 4/15/04 < 5.0 2.5
39 4/20/04 < 5.0 2.5
40 4/27/04 < 5.0 2.5
41 3/3/04 < 5.0 2.5
42 3/9/04 < 5.0 2.5
43 3/16/04 < 5.0 2.5
44 3/23/04 < 5.0 2.5
45 3/30/04 < 5.0 2.5
46 2/3/04 < 5.0 2.5
47 2/10/04 < 5.0 2.5
48 2/17/04 < 5.0 2.5
49 2/24/04 < 5.0 2.5
50 1/5/04 < 5.0 2.5
51 1/13/04 < 5.0 2.5
52 1/20/04 < 5.0 2.5
53 1/27/04 < 5.0 2.5
54 12/7/05 < 5.0 2.5
55 12/13/05 < 5.0 2.5
56 12/20/05 < 5.0 2.5
57 12/28/05 < 5.0 2.5
58 11/1/05 < 5.0 2.5
59 11/8/05 < 5.0 2.5
60 11/15/05 < 5.0 2.5
61 11/22/05 < 5.0 2.5
62 11/29/05 < 5.0 2.5
63 10/4/05 < 1.0 0.5
64 10/10/05 < 1.0 0.5
65 10/18/05 < 5.0 2.5
66 10/25/05 < 5.0 2.5
67 9/6/05 < 5.0 2.5
68 9/13/05 < 5.0 2.5
69 9/20/05 < 5.0 2.5
Date
1 12/10/04
2 12/14/04
3 12/15/04
4 12/21/04
5 12/28/04
6 11/2/04
7 11/11/04
8 11/16/04
9 11/23/04
10 11/30/04
11 10/6/04
12 10/12/04
13 10/19/04
14 10/26/04
15 9/7/04
16 9/14/04
17 9/21/04
18 9/28/04
19 8/2/04
20 8/10/04
21 8/17/04
22 8/24/04
23 8/31/04
24 7/6/04
25 7/11/04
26 7/20/04
27 7/27/04
28 6/2/04
29 6/12/04
30 6/15/04
31 6/22/04
32 6/29/04
33 5/7/04
34 5/10/04
35 5/18/04
36 5/25/04
37 4/6/04
38 4/15/04
39 4/20/04
40 4/27/04
41 3/3/04
42 3/9/04
43 3/16/04
44 3/23/04
45 3/30/04
46 2/3/04
47 2/10/04
48 2/17/04
49 2/24/04
50 1/5/04
51 1/13/04
52 1/20/04
53 1/27/04
54 12/7/05
55 12/13/05
56 12/20/05
57 12/28/05
58 11/1/05
59 11/8/05
60 11/15/05
61 11/22/05
62 11/29/05
63 10/4/05
64 10/10/05
65 10/18/05
66 10/25/05
67 9/6/05
68 9/13/05
69 9/20/05
Data
BDL=1/2DL Results
1 0.5 Std Dev. 0.08
1 0.5 Mean 0.51
1 0.5 C.V. 0.16
1 0.5 n 114
1 0.5
1 0.5 Mult Factor= 1.0900
1 0.5 Max. Value 1.0 ug/L
1 0.5 Max. Pred Cw 1.1 ug/L
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
2.0 1.0
2.0 1.0
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
1.0 0.5
24970rpa.xls, data
- 13 - 5/8/2006

REASONABLE POTENTIAL ANALYSIS
70 9/25/05 < 5.0 2.5
71 8/6/05 < 5.0 2.5
72 8/9/05 < 5.0 2.5
73 8/16/05 < 5.0 2.5
74 8/23/05 < 5.0 2.5
75 8/30/05 < 5.0 2.5
76 7/9/05 < 5.0 2.5
77 7/12/05 < 5.0 2.5
78 7/19/05 < 5.0 2.5
79 7/26/05 < 5.0 2.5
80 6/9/05 < 5.0 2.5
81 6/14/05 < 5.0 2.5
82 6/15/05 < 5.0 2.5
83 6/21/05 < 5.0 2.5
84 6/28/05 < 5.0 2.5
85 5/4/05 < 5.0 2.5
86 5/10/05 < 5.0 2.5
87 5/12/05 < 5.0 2.5
88 5/17/05 < 5.0 2.5
89 5/23/05 < 5.0 2.5
90 5/31/05 < 10.0 5.0
91 4/5/05 < 5.0 2.5
92 4/12/05 < 5.0 2.5
93 4/19/05 < 5.0 2.5
94 4/26/05 < 5.0 2.5
95 3/1/05 < 5.0 2.5
96 3/7/05 < 5.0 2.5
97 3/15/05 < 5.0 2.5
98 3/16/05 < 5.0 2.5
99 3/22/05 < 5.0 2.5
100 3/29/05 < 5.0 2.5
101 2/1/05 < 5.0 2.5
102 2/6/05 < 5.0 2.5
103 2/15/05 < 5.0 2.5
104 2/22/05 < 5.0 2.5
105 1/4/05 < 5.0 2.5
106 1/7/05 < 5.0 2.5
107 1/8/05 < 5.0 2.5
108 1/11/05 < 5.0 2.5
109 1/18/05 < 5.0 2.5
110 1/25/05 < 5.0 2.5
111 1/4/06 < 5.0 2.5
112 1/12/06 < 5.0 2.5
113 1/18/06 < 5.0 2.5
114 1/24/06 < 5.0 2.5
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
70 9/25/05 < 1.0 0.5
71 8/6/05 < ` 1.0 0.5
72 8/9/05 < 1.0 0.5
73 8/16/05 < 1.0 0.5
74 8/23/05 < 1.0 0.5
75 8/30/05 < 1.0 0.5
76 7/9/05 < 1.0 0.5
77 7/12/05 < 1.0 0.5
78 7/19/05 < 1.0 0.5
79 7/26/05 < 1.0 0.5
80 6/9/05 < 1.0 0.5
81 6/14/05 < 1.0 0.5
82 6/15/05 < 1.0 0.5
83 6/21/05 < 1.0 0.5
84 6/28/05 < 1.0 0.5
85 5/4/05 < 1.0 0.5
86 5/10/05 < 1.0 0.5
87 5/12/05 < 1.0 0.5
88 5/17/05 < 1.0 0.5
89 5/23/05 < 1.0 0.5
90 5/31/05 < 2.0 1.0
91 4/5/05 < 1.0 0.5
92 4/12/05 < 1.0 0.5
93 4/19/05 < 1.0 0.5
94 4/26/05 < 1.0 0.5
95 3/1/05 < 1.0 0.5
96 3/7/05 < 1.0 0.5
97 3/15/05 < 1.0 0.5
98 3/16/05 < 1.0 0.5
99 3/22/05 c 1.0 0.5
100 3/29/05 < 1.0 0.5
101 2/1/05 < 1.0 0.5
102 2/6/05 < 1.0 0.5
103 2/15/05 < 1.0 0.5
104 2/22/05 < 1.0 0.5
105 1/4/05 < 1.0 0.5
106 1/7/05 < 1.0 0.5
107 1/8/05 < 1.0 0.5
108 1/11/05 < 1.0 0.5
109 1/18/05 < 1.0 0.5
110 1/25/05 < 1.0 0.5
111 1/4/06 < 1.0 0.5
112 1/12/06 < 1.0 0.5
113 1/18/06 < 1.0 0.5
114 1/24/06 < 1.0 0.5
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
24970rpa.xls, data
- 14 - 5/8/2006

REASONABLE POTENTIAL ANALYSIS
Nickel
Selenium
Date Data BDL=1/2DL Results
1 12/10/04 7.2 7.2 Std Dev. 2.4494
2 12/14/04 3.3 3.3 Mean 4.5544
3 12/15/04 3.5 3.5 C.V. 0.5378
4 12/21/04 < 2 1.0 n 114
5 12/28/04 2.6 2.6
6 11/2/04 3 3.0 Mult Factor = 1.3400
7 11/11/04 4.1 4.1 Max. Value 20.0 ug/L
8 11/16/04 3.6 3.6 Max. Pred Cw 26.8 ug/L
9 11/23/04 < 2 1.0
10 11/30/04 3 2.9
11 10/6/04 4 3.7
12 10/12/04 5 5.2
13 10/19/04 < 40 20.0
14 10/26/04 < 40 20.0
15 9/7/04 3 2.8
16 9/14/04 3 3.2
17 9/21/04 4 3.8
18 9/28/04 3 3.3
19 8/2/04 4 3.7
20 8/10/04 3 2.7
21 8/17/04 3 3.1
22 8/24/04 3 3.2
23 8/31/04 3 3.3
24 7/6/04 4 3.8
25 7/11/04 5 4.9
26 7/20/04 4 3.5
27 7/27/04 4 3.5
28 6/2/04 4 4.1
29 6/12/04 5 5.0
30 6/15/04 4 3.7
31 6/22/04 9 9.1
32 6/29/04 5 5.1
33 5/7/04 8 7.7
34 5/10/04 5 5.2
35 5/18/04 5 5.4
36 5/25/04 6 5.9
37 4/6/04 5 4.7
38 4/15/04 6 5.8
39 4/20/04 4 4.4
40 4/27/04 5 4.5
41 3/3/04 3 2.9
42 3/9/04 5 4.5
43 3/16/04 5 5.2
44 3/23/04 4 4.1
45 3/30/04 4 3.8
46 2/3/04 3 2.8
47 2/10/04 4 4.1
48 2/17/04 4 3.6
49 2/24/04 4 3.6
50 1/5/04 3 3.3
51 1/13/04 4 3.8
52 1/20/04 4 3.6
53 1/27/04 3 2.8
54 12/7/05 4 4.2
55 12/13/05 4 4.4
56 12/20/05 4 4.2
57 12/28/05 4 3.6
58 11/1/05 6 5.9
59 11/8/05 6 5.7
60 11/15/05 4 3.8
61 11/22/05 4 3.9
62 11/29/05 6 6.0
63 10/4/05 9 9.2
64 10/10/05 6 5.7
65 10/18/05 6 5.7
66 10/25/05 5 5.1
67 9/6/05 4 3.8
68 9/13/05 4 4.0
69 9/20/05 6 6.1
Date Data BDL=1/2DL Results
1 12/10/04 < 5 2.5 Std Dev. 1.5405
2 12/14/04 < 5 2.5 Mean 2.7649
3 12/15/04 < 5 2.5 C.V. 0.5572
4 12/21/04 < 5 2.5 n 114
5 12/28/04 < 5 2.5
6 11/2/04 < 5 2.5 Mult Factor= 1.3500
7 11/11/04 < 5 2.5 Max. Value 14.0 ug/L
8 11/16/04 < 5 2.5 Max. Pred Cw 18.9 ug/L
9 11/23/04 < 5 2.5
10 11/30/04 < 5 2.5
11 10/6/04 < 5 2.5
12 10/12/04 < 5 2.5
13 10/19/04 < 5 2.5
14 10/26/04 < 5 2.5
15 9/7/04 < 5 2.5
16 9/14/04 < 5 2.5
17 9/21/04 < 5 2.5
18 9/28/04 < 5 2.5
19 8/2/04 < 5 2.5
20 8/10/04 < 5 2.5
21 8/17/04 < 5 2.5
22 8/24/04 < 5 2.5
23 8/31/04 < 5 2.5
24 7/6/04 < 5 2.5
25 7/11/04 < 5 2.5
26 7/20/04 < 5 2.5
27 7/27/04 < 5 2.5
28 6/2/04 < 3 1.5
29 6/12/04 < 5 2.5
30 6/15/04 < 5 2.5
31 6/22/04 < 5 2.5
32 6/29/04 < 5 2.5
33 5/7/04 < 5 2.5
34 5/10/04 < 5 2.5
35 5/18/04 < 5 2.5
36 5/25/04 < 5 2.5
37 4/6/04 < 5 2.5
38 4/15/04 < 5 2.5
39 4/20/04 < 5 2.5
40 4/27/04 < 5 2.5
41 3/3/04 < 5 2.5
42 3/9/04 < 5 2.5
43 3/16/04 < 5 2.5
44 3/23/04 < 5 2.5
45 3/30/04 < 5 2.5
46 2/3/04 < 5 2.5
47 2/10/04 < 5 2.5
48 2/17/04 < 5 2.5
49 2/24/04 < 5 2.5
50 1/5/04 < 5 2.5
51 1/13/04 < 5 2.5
52 1/20/04 < 5 2.5
53 1/27/04 < 5 2.5
54 12/7/05 < 5 2.5
55 12/13/05 < 5 2.5
56 12/20/05 < 5 2.5
57 12/28/05 < 5 2.5
58 11/1/05 < 5 2.5
59 11/8/05 < 5 2.5
60 11/15/05 < 5 2.5
61 11/22/05 < 5 2.5
62 11/29/05 < 5 2.5
63 10/4/05 < 2 1.0
64 10/10/05 < 2 1.0
65 10/18/05 < 5 2.5
66 10/25/05 < 5 2.5
67 9/6/05 < 5 2.5
68 9/13/05 < 5 2.5
69 9/20/05 < 5 2.5
24970rpa.xls, data
- 16 - 5/8/2006

REASONABLE POTENTIAL ANALYSIS
70 9/25/05 7 6.6
71 8/6/05 5 4.6
72 8/9/05 4 3.9
73 8/16/05 4 3.5
74 8/23/05 5 4.8
75 8/30/05 4 4.2
76 7/9/05 6 5.5
77 7/12/05 4 4.2
78 7/19/05 4 4.1
79 7/26/05 3 3.1
80 6/9/05 5 5.2
81 6/14/05 5 4.8
82 6/15/05 6 6.3
83 6/21/05 4 4.0
84 6/28/05 7 7.2
85 5/4/05 5 4.9
86 5/10/05 4 4.3
87 5/12/05 5 4.7
88 5/17/05 5 4.8
89 5/23/05 5 4.6
90 5/31/05 < 10 5.0
91 4/5/05 4 3.9
92 4/12/05 3 3.3
93 4/19/05 5 4.8
94 4/26/05 7 6.5
95 3/1/05 3 3.2
96 3/7/05 5 4.7
97 3/15/05 4 4.1
98 3/16/05 4 3.9
99 3/22/05 3 2.9
100 3/29/05 3 3.0
101 2/1/05 5 4.5
102 2/6/05 5 5.0
103 2/15/05 5 4.8
104 2/22/05 4 4.0
105 1/4/05 3 2.8
106 1/7/05 4 3.6
107 1/8/05 4 3.7
108 1/11/05 4 3.8
109 1/18/05 3 3.3
110 1/25/05 3 3.4
111 1/4/06 4 3.6
112 1/12/06 4 3.9
113 1/18/06 3 3.2
114 1/24/06 3 3.1
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
70 9/25/05 <' 5 2.5
71 8/6/05 < 5 2.5
72 8/9/05 < 5 2.5
73 8/16/05 ;<s 5 2.5
74 8/23/05 5 2.5
75 8/30/05 < 5 2.5
76 7/9/05 5 2.5
77 7/12/05 5 2.5
78 7/19/05 < 5 2.5
79 7/26/05 < 5 2.5
80 6/9/05 < 5 2.5
81 6/14/05 < 5 2.5
82 6/15/05 5 2.5
83 6/21/05 5 2.5
84 6/28/05 5 2.5
85 5/4/05 14 14.0
86 5/10/05 5 2.5
87 5/12/05 I< 5 2.5
88 5/17/05 < 5 2.5
89 5/23/05 < 5 2.5
90 5/31/05 <: 20 10.0
91 4/5/05 5 2.5
92 4/12/05 9 9.4
93 4/19/05 7 6.9
94 4/26/05 6 6.4
95 3/1/05 5 2.5
96 3/7/05 < 5 2.5
97 3/15/05 < 5 2.5
98 3/16/05 < 5 2.5
99 3/22/05 < 5 2.5
100 3/29/05 4; 5 2.5
101 2/1/05 _' 5 2.5
102 2/6/05 5 2.5
103 2/15/05 5 2.5
104 2/22/05 < 5 2.5
105 1/4/05 < 5 2.5
106 1/7/05 < 5 2.5
107 1/8/05 < 5 2.5
108 1/11/05 < 5 2.5
109 1/18/05 < 5 2.5
110 1/25/05 < 5 2.5
111 1/4/06 <' 5 2.5
112 1/12/06 < 5 2.5
113 1/18/06 < 5 2.5
114 1/24/06 < 5 2.5
115
116
117
118
119
120
121
122
123
124
125 `3
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
24970rpa.xls, data
- 17 - 5/8/2006

NPDES/Non-Discharge Permitting Unit Pretreatment Information Request Form
t
G G
NPDES OR NONDISCHARGE PERMITTING UNIT COMPLETES THIS PART:
Date of Request 3/3/2006
Facility
Charlotte MSD- McAlpine Creek WWMF
Permit #
NC0024970
Region
Mooresville
Requestor
Toya Fields
Pretreatment A-F Towns- Dana Folley (ext. 523)
Contact G-M Towns- Jon Risgaard (ext. 580)
N-Z Towns- Deborah Gore (ext. 593)
D ✓Yl
COMMENTS * PRETREATMENT UNIT:
ps e
�„ —it)/Akc
n\Q.
PRETREATMENT UNIT COMPLETES THIS PART:
Status of Pretreatment Program (circle all that apply)
1) the facility has no SIU's and does have a Division approved Pretreatment Program that is INACTIVE
2) the facility has no SIU's and does not have a Division approved Pretreatment Program
the act I has,(pr in rfa' =g a re rea ment Program
is Full Program with LTMP ,.! or 3b) is Modified Program with STMP
4) the facility MUST develop a Pretreatment Program - Full Modified
5) additional conditions regarding Pretreatment attached or listed below
Flow Permitted MGD i Actual MGD
91'1'v3 `
Industrial 3.' 5 i D,./. `
ST P t! fram •
m ce t
�,
i-.�1
ne cycle
Domestic , 5`7 910`1
ts)
T
MP
Pollutant4
Check List
POC due to
NPDES/Non-
Discharge
Permit Limit
Required
by EPA'
Required by
503 Sludge"
POC due to SIU"'
Site specific POC (Provide Explanation)••••
STMP
Freque
efflu
y at
LTMP
Frequency at
effluent
DcROD
L
L
4
Q
✓
TSS
L-
f.
4
Q M
t/
NH3
L-
L.
Q M
V
Arsenic
✓
4
Q M
4
Cadmium
q
✓
L
4
Q M
4
Chromium
j_
-4
1—
Q M
Copper
!
q
V
L.
4
Q M
Cyanide
L.
4.
4
Q M
4
Lead
L-
I
V
L
Q M
✓
Mercury
i—
►/
Ir
4
Q M
.✓Molybdenum
in
/
L
•
Q M
'
Nickel
-1
;/
I_
4
Q M
✓
Silver
ill
J—
-
4
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Selenium
V
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4
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yy
4
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all LTMP/STMP effluent data
and appge
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in the L P if the POTW l`n
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"' Only in LT while the SIU is connected to the POTW _ jiy `NI 1 u n :Pe :^
•• Only in LT P when the pollutant is a specific concem to the POT (ex -Chlorides for a POTW who accepts Textile waste)
on DMRs?
Yes
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j 1 ti Gt0 ✓1 e rt a '7-)1,p
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M=Monthly
Comments: h IJ 5 I! f V. 5 (.) L a v1 e ._ arc
a -I In sporeadsih_, j Ifte
111^ 0d
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1r, e iA rn. C' � m a-. / ct:�,1/ r( Gr t r e lz
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w h 1 •$- e v'e O r- Vvx o% I h of e ti t c „•% i h 1I PD 0.7
NPDES Pretreatment. request.form.031008
Revised: August 4, 2000

ssoe,o sr��
-y NNW
o a
Q
02
�Tq< PRO1
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
REGION 4
ATLANTA FEDERAL CENTER
61 FORSYTH STREET
ATLANTA, GEORGIA 30303-8960
Ms. LeToya Fields
North Carolina Department of Environment and
Natural Resources
Division of Water Quality
NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
SUBJ: Draft NPDES Permit
McAlpine Creek WWTP
Permit No. NC0024970
I�!
��I 1
ll�
JUL 1 2 2006
DENR - WATER QUALITY
POINT SOURCE BRANCH
Dear Ms. Fields:
Based on inclusion of a requirement for instream monitoring for ambient hardness in the
draft permit referenced above, especially for sampling sites just above and below the South
Carolina border, we have no further comments. We request that we be afforded an additional
review opportunity only if significant changes are made to the draft permit prior to issuance or if
significant comments objecting to the permit are received. Otherwise, please send us one copy of
the final permit when issued.
Sincerely,
Marshall Hyatt, Environmental Scientist
Permits, Grants, and Technical Assistance Branch
Water Management Division
cc: Jacqueline Jarrell, P.E., CMUD
Jeff deBessonet, SCDHEC
Internet Address (URL) • http://www.epa.gov
Recycled/Recyclable • Printed with Vegetable Oil Based Inks on Recycled Paper (Minimum 30% Postconsumer)

Re: justchecking - any news on McAlpine?
Subject: Re: just checking - any news on McAlpine?
From: Toya Fields <toya.fields C ncmail.net>
Date: Mon, 10 Jul 2006 12:55:08 -0400
To: [e-mail]
Marshall,
I've spoken with the facility. They are ok with getting instream hardness monitoring
to coincide with the copper and zinc monitoring. If you are ok with this could you
send an email as well as an "official" letter? If I get the final permit out this
week then it can be effective August 1st.
Toya
[e-mail] wrote:
please call me asap after lunch re this. I'm at 404-562-9304.
thanks!
Toya Fields - [e-mail]
Environmental Engineer I
Western NPDES Program.
Division of Water Quality
Tel: [phone] x 551
Fax: [phone]
1 of 1 7/11/2006 10:57 AM

Re: cor;tments on NC0024970, CMUD McAlpine Cr. WWTP
Toya Fields - [e-mail]
Environmental Engineer I
Western NPDES Program
Division of Water Quality
Tel: [phone] x 551
Fax: [phone]
Toya:
just some quick thoughts.
1. thanks for the detailed reply and for doing that research for me.
I understand now what's going on. thanks for agreeing to make clear
that the 1067 #/day mon avg limit applies to McAlpine.
2. re comment #5, I looked more closely at the permit. Since it
requires only monthly testing, my concern is probably moot. If they
happen to do more testing in a month, that has to be reported anyway.
3. re comment #6b, to ensure that SC WQS are protected, it seems
essential to conduct ambient hardness monitoring concurrent with ambient
metals monitoring. if that doesn't occur, how would compliance with SC
WQS be assessed? if this concern can be addressed, am ready to send a
no comment letter.
2 of 2 7/11/2006 10:56 AM

Draft Permit Reviews (3)
•
Subject: Draft Permit Reviews (3)
From: John Giorgino <[e-mail]>
Date: Mon, 26 Jun 2006 10:53:12 -0400
To: Toya Fields <[e-mail]>
Hi Toya, I had these in my box, but did not send an email. I had no comments on
them.
NC0088226 Wachovia
NC0020290 Burnsville
NC0024970 McAlpine Crk,
Thanks for forwarding them.
John Giorgino
Environmental Biologist
North Carolina Division of Water Quality
Environmental Sciences Section
Aquatic Toxicology Unit
Mailing Address:
1621 MSC
Raleigh, NC 27699-1621
Office: 919 733-2136
Fax: [phone]
"The real work of men was hunting meat. The invention of agriculture was a giant step
in the wrong direction, leading to serfdom, cities, and empire. From a race of
hunters, artists, warriors, and tamers of horses, we degraded ourselves to what we
are now: clerks, functionaries, laborers, entertainers, processors of information." -
Edward Abbey
1 of 1 6/26/2006 10:52 AM

Re: corralents on NC0024970, CMUD McAlpine Cr. WWTP
Subject: Re: comments on NC0024970, CMUD McAlpine Cr. WWTP
From: Toya Fields <[e-mail]>
Date: Fri, 16 Jun 2006 11:29:17 -0400
To: [e-mail]
Hi Marshall.
1) They were not sure at the time how they were going to meet the limits.
Construction activities have been conducted, however CMUD decided that the best way
to meet the limit on all three plants was to make the upgrades at McAlpine. I also
want to point out that the 534 #/day limit never actually took effect. The mod
schedules the limit to take effect on 2/28/06, however the special condition states
that if CMUD does construction at Sugar Creek or Irwin then the combined limit (826
#/day) would take effect 2/28/07. Those construction activities would then trigger
the individual TP limit for McAlpine (534 #/day). However, if CMUD did not perform
(and they did not) construction at Sugar Creek or Irwin, then the combined limit
would take effect on 2/28/06. So, as things turned out, McAlpine was actually never
subject to the individual 12- month average limit.
I called CMUD to discuss their interpretation of the permit and their recollection of
the settlement agreement. We looked over the agreement and it reiterates the above
(in clearer wording, believe it or not) but also states "Whether or not the City
conducts construction activities at either the Sugar Creek plant or the Irwin Creek
plant... an effluent limitation of 1,067 lbs/day averaged on a monthly basis shall
also apply to the McAlpine Creek Plant commencing on February 28, 2006."
The agreement then goes on to state that Sugar Creek would receive a specific
numerical monthly average limit if CMUD did construction there, and the same thing
for Irwin. So there were monthly average limits set up for each plant if CMUD
constructed phosphorus removal at any of them. Monthly average limits, but not
12-month average limit.
So based on the agreement, McAlpine Creek should receive a monthly average limit of
1,067 lbs/day and all three plants should receive a combined 12- month average limit
of 826 lbs/day. I'll add in the monthly average limit. But they should not get a
534 #/day 12-month average limit.
2,3,4,6a) ok.
5) Looks like this was part of the discussion back when they made the mod. It was
done specifically so that the facility could choose. I don't know that it would make
a difference at the compliance end because we're talking about monthly and 12-month
rolling averages, but the facility requested some flexibility in case there are
anomalies.
6b) I'm not sure. I'll ask the facility if there is any history for that. I know
they are voluntarily monitoring hardness because they supplied data for the
copper/zinc limit calculation. I'll get back to you on that one.
Toya
[e-mail] wrote:
1. the 5/5/02 permit mod required a TP annual limit of 534 #/day
specific to this facility and apparently, that limit became effective on
the last day of the term of the current permit. Was it assumed at the
time of that mod that construction activities for TP would be conducted?
when did that assumption change - when did CMUD notify you that
construction would not occur? I'm trying to see if I should be
concerned about antibacksliding.
2. recommend changing "total suspended residue" to "total suspended
solids" in A.1 and footnote 2.
1 of 2 7/11/2006 10:57 AM

Re: comments on NC0024970, CMUD McAlpine Cr. WWTP
3. selenium should be expressed as "total selenium".
4. the last sentence of footnote 6 should say "see Part A(4)."
5. re A.3, where TP is defined, it allows that either daily, weekly, or
monthly average values be reported. As written, that seems to allow use
of daily avg in one month and weekly avg in another month, for ex (the
facility gets to pick and choose). To be consistent, wouldn't it be
better if one method was chosen and used all the time? If so, seems
like monthly avg would be best.
6. a. Ink.5-A.8, recommend expressing all metals as "total".
b. wh44 isn't hardness monitored instream (for the metals)?
ksr
Toya Fields - [e-mail]
Environmental Engineer I
Western NPDES Program
Division of Water Quality
Tel: [phone] x 551
Fax: [phone]
2 of 2 7/11/2006 I0:57 AM

1
Ru •
,F< s4li• -1 e.. i•} %j Crr-t'y'11rjr..
:-.*i-f“,i,.
State of: North,Carolina
{ ti
Environmental Management Comnhission/ NPDES• Ur
S, ) 617. Mail•Service Center
2 .. ,. t > t �" ., fR.aleigh�' NCr27699-1617 4, at
Nofifr<agtian tof In f enf•tto Issue `N DES, W ste y r « 'x }, i, .,
r , a as ... to ermit
•mil � '
the basis of4t��rough staffl-eview and a I �r �:,
ether lawful sfici` �• aids` ands re uldtio s' th p,Icc�tion<©tK NCGeneral`statufie �1'43 21', Pubiic I 2=500
a
9 , h e North Carolrnci EnOanment`a Mgriagemen ', or'�rti�
proposes4o, Issu a National POIlufant Discharge Eliminafion;System (NPDES) rtva_ ste_water. p
person(s) listed below effective 4�5�y•days..frofn the'publish}date'ofthis'notice. peg
Written commen regardrng',the,' '' o : os ,, <::, f rtiY Y�, , ... r• �', rs�t
P p edpermit�wrll be a ce , }• f , . � , 00 s
this notice. All co � meats `receive -. "` '" 1 � � � ,- � pted until 30 days after the'
publrse a o
. X 4� • r��t�;ue�� p priorfa'that date are considered in the finial detefrninatr'ons' a `ar y`'' '
the proposed pe (t, The D�rec �; � h"e � � � .., y lira
t o; . rC Divisrorl of a er ual' r <.. �f ,H. ,--;�: g
for the propose erm! `s. ou := r' tii.; M, _ t ..Q rtymay decide, o:holc� a pup�rc tTiee
�s �,.t Division receive a`srgn,ficant degree' of anferest: wj' ~''`i'f i` `
f Copies "oft a dr -- . . a� , 'W` ft.' ,- .a,� . r .t.
p rmi a d�.oier �u�or ...
' � � �'"`�- e�.;. g !�,, �. ��. .� ing: Informafion on file used to determine condrtior�� 'resent.
-m'the draft`perm�3;arer alai a e� on re. rJesf d.` P
, s e ti 1ywha s
and/or re nests 1?a r p'. q 'pro: of ttre costs of rep�roduct o Mgfi �corriments;�
qu. r infor ation tto' the NC Dr ,sion or Water Qualiat .the -above "add e s or call.; a Point
Source Branch ate 19 733 5083, ex'tensron 520-'Please�r ciude -the NPDES permit number` - , th
.communication 'Interested persons ma: also;.visrt..�t e� . ,:,(attached�in ary.�
` Raleigh NC fion � : Y l o ,t tiDivrsiop;'.o f T.Water. Qualityr,at.5"12;
f,.� 4-:1148 between the hours of 8.00 ' oonafi 4f illil e' 02
f.-, '_ . r,2.'tO.:P • 1: ��. •� 24,m; and 5•00 p:m #o:review the informafion o
r CMar r� vile er!
otte,.•l�eckleburg���ltili �'I]e �� .�. � , : ;: }.y, t` �� �,:t; 4,f :;.. ta: 1 ;�r�c;��� �
H -j`
- • - x e t k tY� pa me`r,1��400Q Westmont ;pave £har�otte ANC 2821 �) fias�c
f renewal pf NPDES permit�:NC0024970 for,the' 1ficAl me Creek WTP in Mecklenbur Courit T : is
., y dischargest64; MGD treated wastewater pma' ne crgoie�in t e,Catawba:River E` h'
I CBOD;` ammonia .r itrogen,. -fecal cohfor�m, aYnd total,, 3 f �- d ,
discharge ma affect future afocations in this,portion of the Catawba River Bo afer: quad
sin
•
��
ough Ecori, l c tP0 Box 669583 C " _ '" 1 ` j . "`
harlotte;' NC 28226) has applied for renew of NPDES permit.NC0058084.
for' the Gou h ,,Eon..: WTP in Mecklenburg: County' This ermitted.:facili
g E ' on IncInc
Wastewater to.Sa : p ..
r ►t, rinarned tri Jufanfio'the Cgtt�Wba•River In,the Catawba. River. tY discharges meters
may be water; quairay limited, i:whicf� ma �affec#� f � _ R�,, Basin Some ;parar'riefers'
,-Basin °r • z}-'�'; t z mi ", o: T Y uture allocations , in this portion th w
y oi, a Cata ba River
' r7;. <' J +7 . .t.'i rr ,'i '<F. f s nF-t ' "+ ri r r r
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perr S :for' . it Nu , r N _' 8 87. Crty1of� Charto e :jM4cklenburg Caunty ,h �s=,ap plied fog , r:
uglas 2(nternotjonal Airport dischar i A? . , r tormwater to
•: Co"ffey Crreek;: UT cer Bra' '"' -� � g ng. treated w_astewate n star ' nc�i and UT Ta [ra d r spen J d
, , . ggartiCree in tf�e Cattawba:River Bashi :Currenflyitotdl-su�s •�ende. "
i. solids, oil, and• ;.greaise,<benzene, ,and. toluene. are wat r..quality limited: -This"dischar�
allocations in' this jortion o f the"receiving stream 9e may affect _future

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Driving Directions from Raleigh, NC to 12701 Lancaster Hwy, Pineville, NC
Page ▪ 34of 3
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Driving Directions from Raleigh, NC to 12701 Lancaster Hwy, Pineville, NC
Page Sof 3
12: Merge onto PINEVILLE-MATTHEWS RD / NC-51 S via 0.6 miles
EXIT 64B.
0.8 miles
13: Turn LEFT onto CAROLINA PLACE PKWY.
14: Turn LEFT onto S LANCASTER HWY.
®15: End at 12701 Lancaster Hwy
Pineville, NC 28134-6333, US
0.2 miles
Total Est. Time: 3 hours, 5 minutes Total Est. Distance: 184.34 miles
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http://www.mapquest.com/directions/main.adp?do=prt&mo=ma&un=m& 1 ffi=1 &go=1 & 1 c r Raleigh&... 2/14/2006