NPDES
REPORTING
REQUIREMENTS
HANDBOOK
w\vw.eua.gov region6 6eiLwdninnan.pdf
# Q '
Revised August 25, 2004
Environmental Protection Agency
Region 6 (6EN-WC)
1445 Ross Ave., Suite 1200
Dallas, TX 75202-2733
-------
PROGRAM AUTHORITY
Facilities that discharge wastewater to receiving waters of the United States must apply for a
National Pollutant Discharge Elimination System (NPDES) permit for that discharge. Program
Authority is in accordance with Sections 301, 302, 308, 402 and 503 of the Federal Water
Pollution Control Act of 1972, as amended by the Clean Water Act of 1977. The Permittee is
responsible for understanding and meeting all permit requirements and submitting complete,
accurate and legible self-monitoring data.
This booklet is designed to assist the permittee in complying with the reporting
requirements in the NPDES permit. We will take you step-by-step in tilling out the Discharge
Monitoring Report (DMR) and submitting non-compliance and other reports. We have listed the
most commonly asked questions with the answers. You will also find helpful information in the
form of commonly used math formulas and acceptable abbreviations for filling out the DMR.
TABLE OF CON TENTS
-------
I. DISCHARGE MONITORING REPORTS (DMRS) Page 2
II.
REVISED/CORRECTED DMRS
Page 7
III.
SELF-GENERATED DMRS
Page 8
IV.
NON-COMPLIANCE REPORTS (NCRS)
Page 9
V.
BYPASS/OVERFLOW/UPSETS REPORTS
Page 11
VI.
SCHEDULES/REPORTS
Page 12
VII.
SLUDGE REPORTING REQUIREMENTS
Page 13
VIII.
BIOMONIT ORIN G/T OXICIT Y
Page 20
IX.
CONCENTRATED ANIMAL FEEDING OPERATIONS
(CAFO)
Page 22
X.
STORM WATER
Page 23
XI.
OFFSHORE GENERAL PERMIT GMG290000
Page 24
XII.
MOST COMMONLY ASKED QUESTIONS
Page 25
XIII.
MISCELLANEOUS
Page 28
A. Math Formulas
B. Fecal Coliform
C. Metric System
D. Population Equivalent
E. Compounds/Pesticides
F. Frequency of Analysis
G. Sample Types
H. Definitions and Calculations for DMRs
Page 29
Page 31
Page 33
Page 34
Page 35
Page 38
Page 40
Page 41
l
-------
I. DISCHARGE MONITORING REPORTS (DMRS)
The sample collection and analytical results required by the effective permit (EPA or state
issued) must be reported to the enforcement authority (EPA or state) through the submission of
DMRs (EPA Form 3320-1). An original and one legible copy of the DMRs must be submitted to
the enforcement authority by the date specified in the permit. This data is entered into a national
database available to the public. It is extremely important that the data reported on the DMR be
accurate, timely, and legible to ensure the facility's compliance status is correctly reflected. The
reported data will be compared with the current limits contained in the permit or any
enforcement order to determine facility compliance. It should be noted that a DMR is required
even if the facility did not have a discharge during a reporting period.
2
-------
FIGURE 1
PERMITTEE NAME,'ADDRESS :indu<* Facility Narrei'Locat-on if Different)
NAME
ADDRESS
FACILITY
LOCATION
o
o
NATIONAL POLLUTAN* DISCHARGE ELIMINATION SYSTEM (NPDES)
DISCHARGE MONITORING REPORT (DMR)
PERMI
MBER
O
FROM
MONITORING PERIOD
- -
.. v b = -
YEAR
MO
DAY
TO
YEAR
MO
DAY
(20-21) (22-23) (24-25)
Form Approved.
OMB No. 2040-0004
Approval expires 05-31-98
~ Check here if No Discharge
NOTE: Read Instructions before completing this form
(26-27) (28-29) (30-31)
PARAMETER
(32-37)
(3 Card OnlyJ QUANTITY OR LOADING
(46-53) (54-61)
(4 Card Only) QUALITY OR CONCENTRATION
(38-45) (46-53) (54-61)
NO.
EX
FREQJENCY
OF
SAMPLE
TYPE
(69-70)
AVERAGE
MAXIMUM
UNITS
MINIMUM
AVERAGE
M.AXIMUM
UNITS
<62-63}
ANALYSIS
(64-68)
SAMPLE
MEASUREMENT
(
IE
WW
PERMIT
REQUIREMENT
SAMPLE
MEASUREMENT
PERMIT
REQUIREMENT
SAMPLE
MEASUREMENT
PERMIT
REQUIREMENT
SAMPLE
MEASUREMENT
PERMIT
REQUIREMENT
SAMPLE
MEASUREMENT
PERMIT
REQUIREMENT
SAMPLE
MEASUREMENT
PERMIT
REQUIREMENT
SAMPLE
MEASUREMENT
PERMIT
REQUIREMENT
NAME/TITLE PRINCIPAL EXECUTIVE OFFICER
CERTIFY UNDER PENALTY OF _AiV THA" TMS DOCUMENT ANDALLATTACHMENTS WERE PRE:WED
TELEPHONE
DATE
THAT QUALIFIED PERSONNE. PROPERLY GATHERAND EVALUATE THE INFORMATION SUBMITTED.
5ASED ON MY INQUIRY Or THE PERSON OR PERSONS WHO MANAGE THE SYSTEM, OR "HOSE
PERSONS DIRECTLY RESPONSIBLE FOR GATHERING THE INFORMATION. THE NFOR-MA"ION
DL5MITED IS, TO "HE 5EST OF NTT
-------
DISCHARGE MONITORING REPORTS (DMRS)
Instructions for Completion
See Figure 1
DISCHARGE MONITORING REPORT
1. Permittee Name/Address - Name and mailing address of permittee.
2. Facility/Location - Enter if different from mailing address.
3. Permit Number - The permit number usually consists of nine characters, alpha and
numeric combined. Currently, the permit numbers begin with the two-digit alpha state
abbreviation (EX: ARXXXXXXX, etc.). For permits issued by the State of Texas
(TPDES), the EPA ID Number is the permit number used for reporting purposes. Other
variations of the permit number will be assigned to identify special programs (EX: storm
water, oil and gas, sludge, etc.)
4. Discharge Number (Outfall Number) - Consists of a combination of four alpha and
numeric characters. (EX: 001A, 002Q, 003S, 004Y). Some exceptions include, but are
not limited to, biomonitoring/toxicity, and sludge. The first two characters are "TX" for
biomonitoring/toxicity reporting and "SL" for sludge reporting. The last two characters
are usually an assigned code used for Agency tracking purposes (EX: TX1A, TX1S,
TX1Y, SLDP, SLSA, SLSF, etc.).
5. Monitoring Period - From first day of monitoring period through last day of monitoring
period. The dates should be displayed as YR MO DAY. Applicable monitoring
periods will be specified in each permit. Some examples include, but are not limited to:
Monthly
02
01
01
to
02
01
31
Quarterly
02
01
01
to
02
03
31
Semi-annual -
02
01
01
to
02
06
30
Annual
02
01
01
to
02
12
31
6. No Discharge - Mark this block if the facility has no discharge for a specific outfall
during the monitoring period. Do not mark if the facility had a discharge but failed to
sample.
7. Parameters - Specified in the permit as effluent characteristics for each discharge number
(outfall), one parameter per box. Each box must display the parameter name and
corresponding storet code number. (EX: BOD (00310), pH (00400), TSS (00530), flow
(50050)). The parameters should display on the DMR form in numeric order by storet
code number. Consult the appropriate regulatory agency if any changes need to be
made to the pre-printed or self-generated DMRs.
8. Sample Measurement - Sample measurement data for each parameter under "Quantity or
Loading" or "Quality or Concentration" in accordance with permit limitations. Indicate
4
-------
units (lbs/day, mg/L, su, etc) as specified in the permit. It may be necessary to do
calculations to convert data to the units required in the permit. "Average" is normally
arithmetic average (geometric average for bacterial parameters) of all sample
measurements for each parameter obtained during the monitoring period. "Maximum"
and "Minimum" are normally the highest and lowest measurements obtained during the
monitoring period. (See Table 1 - math formulas.) Consult the appropriate
regulatory agency if any changes need to be made to the pre-printed or self-
generated DMRs.
A. No. EX (Number of Exceedance') - Total of sample measurements that exceed the
daily maximum, daily minimum, 7-day (weekly) average permit limit. DO NOT
include monthly average or daily average violations in this field. If none, enter
"0". Permittees with continuous pH, or temperature monitoring requirements
should consult the permit for what constitutes an accedence and report
accordingly.
B. Frequency of Analysis - Actual frequency of analysis used during the monitoring
period; the minimum requirement is as specified in the permit. Enter "CONT" for
continuous monitoring, "01/07" for one day per week, "01/30" for one day per
month, "01/90" for one day per quarter, etc. Some examples are included in
Table 2.
C. Sample Type - Actual sample type used during monitoring period. Enter
"GRAB" for individual sample, "24HC" for 24-hour composite, "CONT" for
continuous monitoring. Some examples are included in TABLE 3.
9. Permit Requirement - Effluent limitations for each parameter as specified in the permit
are displayed on the DMR under "Quantity or Loading" and/or "Quality or
Concentration". Monitoring requirements for frequency of analysis and sample type as
specified in the permit are also displayed. The DMR must reflect the most current
monitoring and reporting requirements. Consult the appropriate regulatory agency if
any changes need to be made to the pre-printed or self-generated DMRs.
10. Name/Title Principal Executive Officer or Authorized Agent - See the permit for
qualifications of Principal Executive Officer and signature authorization.
11. Signature - Original legible signature of authorized Principal Executive Officer or
Authorized Agent. Every page of the DMR must have an original signature.
In the event a revised or corrected DMR is necessary, an original authorized signature
and date of signature is required on each page. The word REVISED should be clearly
visible on each page of the form.
12. Telephone - Telephone number of Principal Executive Officer.
5
-------
13. Date - Actual date of signature certifying authenticating data submitted
on DMR.
14. Comments - May contain any clarifying information of permit requirements or reporting
instructions.
NOTE: The results of any additional monitoring of parameters at the location(s) designated in
the permit, using approved analytical methods, must be included on the DMR.
THE MOST RECENT VERSION OF A DISCHARGE MONITORING REPORT (FIGURE 1)
CAN BE FOUND AT:
http://www.epa.g0v/region6/6en/w/dmr.htm
http://www.epa.g0v/region6/6en/w/dmr.pdf
6
-------
II. REVISED/CORRECTED DMRS
Sometimes it will be necessary for the facility to submit a revised or corrected DMR
either because the Agency has requested it or the facility has discovered an error. Some reasons
for submitting a revision/correction are:
1. Missing original or unauthorized signature
2. Missing NPDES Permit Number, Discharge Number (Outfall Number) and/or
Monitoring Period
3. Missing sample measurements
4. Parameters not reported
5. Loading measurements not correctly calculated
6. Missing Frequency of Analysis, Sample Type and/or Number of Excursions
7. Wrong monitoring period shown on DMR.
When a revised/corrected DMR is submitted, it must:
1. Have an original authorized signature. Signatures from a carbon copy,
photocopy, stamp, or computer scanner are not acceptable.
2. Date of new signature
3. Be clearly marked as a revised or corrected DMR
4. Revised data should be highlighted or otherwise clearly indicated.
7
-------
III. SELF-GENERATED DMR FORMS
Before undertaking the task of generating self-monitoring reports, the facility should first
contact their regulatory agency. In order to receive approval from EPA for use of a facility-
generated (self-generated) DMR form, a facility must submit an approval request with sample
DMRs (clearly marked "SAMPLE" and not signed) reflecting permit requirements for each
monitoring period and discharge number. The forms submitted for approval must be an exact
replica of the DMRs provided by the Agency with printing no smaller than the type on the pre-
printed DMRs. These facility-generated forms must not be used until Agency approval has
been obtained. If there is a change in monitoring or reporting requirements (EX: reissued
permit), it will be necessary for the facility to revise their forms to reflect the changes and
resubmit for approval. OMB Forms Approval Number in the upper right corner of the pre-
printed DMR and the form number and other information under the last solid line at the bottom
of the DMR form should not be included on the facility's self-generated forms.
8
-------
IV. NON-COMPLIANCE REPORTS (NCRst
The Permittee shall report any instances of non-compliance with their permit. See your permit
for specific requirements for reporting anticipated non-compliance, 24-hour reporting of
conditions which may endanger health and the environment (via phone, e-mail or fax) and other
non-compliances which must be reported.
This report must include the following information as indicated on Figure 2, SAMPLE NON-
COMPLIANCE REPORT:
1. Type of violation
Name of parameter and outfall, or description such as overflow/bypass.
2. Date of violation
A date range is required for multi-date non-compliance reporting. If you
have a 7 day violation, you must provide the first and last date of that
7 day monitoring period.
3. Durati on of vi ol ati on
4. Cause of violation
5. Corrective action/Health or Environmental Impact/Preventative Measures/Other
Narrative
The exact date and value of each occurrence for a minimum or maximum violation means to
state the actual date the sample is taken and the value derived from the sample that exceeds the
limit. If the sample exceeds the limit more than once in a monitoring period indicate each
sample and value for that period.
9
-------
^ EPA REGI0N 6 NPDES NON-COMPLIANCE REPORT FORM / PeG/n
1^2/ Facility Name: i&SM*
PRO\*f
NPDES Permit Number: **ce
Name of
Parameter &
Description
(e.g. TSS at Outfall
001, pH at Outfall 003,
Sanitary Sewer
Overflow at
123 Main St.)
Numeric Value
(e.g., volume,
concentration or load)
(i.e., 67 mg/L daily
max, 100 lbs/day or
100,000 gal)
Permit
Limit
(e.g. 45
mg/L)
Date of
Violation
Duration of
Violation
Cause of Violation (e.g.,
power failure, sludge pump
failure)
Corrective Action/Health or
Environmental
Impact/Preventative
Measures/Other Narrative
(e.g., replaced pump, restored power,
replaced backup generator, fish kill,
applied disinfectant)
Reported by: Date of Report: Phone #:
You may enter your data online and print this form.
Title: This is an optional form that you may alter for your
own purposes.
Sf 2e^$lu9etptiaE>©f law that this document and all attachments were prepared under my direction or
supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate
the information submitted Based on my inquiry of the person or persons who manage the system, or those
persons directly responsible for gathering the information, the information submitted is, to the best of my
knowledge and belief, true, accurate, and complete I am aware that there are significant penalties for submitting
false information, including the possibility of fine and imprisonment for knowing violations
Figure 2
10
-------
V. BYPASS/OVERFLOW/UPSET REPORTS
(Twenty-Four Hour Reporting)
A bypass, an overflow and an upset condition are all deviations from the permit
conditions and as such are subject to reporting conditions. If any noncompliance endangers
health or the environment, it should be reported orally within 24 hours from the time the
permittee becomes aware of the circumstances. A written submission shall be provided within
5 days of the time the permittee becomes aware of the circumstances. The report shall contain
the following information:
1. A description of the noncompliance and its cause;
2. The period of noncompliance including exact dates and times, and if the
noncompliance has not been corrected, the anticipated time it is expected to
continue; and,
3. Steps being taken to reduce, eliminate, and prevent recurrence of the
noncomplying discharge.
The 24-hour verbal report shall include:
1. Any unanticipated bypass, which exceeds any effluent limitation in the permit;
2. Any upset which exceeds any effluent limitation in the permit;
3. Violation of a maximum daily discharge limitation for any of the pollutants listed
by the Director in Part II (industrial permits only) of the permit to be reported
within 24 hours.
11
-------
VI. SCHF,DITTOS/REPORTS
In addition to DMRs and non-compliance reports (NCRs), the permit or formal
enforcement actions may contain additional reporting provisions, with specific reporting
requirements. These specific provisions could include compliance schedules with progress
reports, pretreatment requirements, toxicity, sludge, storm water, etc. The actual completion
date of any scheduled activity must be included in the submitted report and the report is due
within 14 days of the scheduled activity. Any report which indicates noncompliance with a
scheduled event should include the reason for the delay, what actions are being taken to get back
on schedule, and how the delay will affect the remaining schedule events. See the permit or
formal enforcement action for specific reporting dates and requirements.
12
-------
VII. SLUDGE REPORTING REQUIREMENTS
Federal regulations contained in 40 CFRPart 503 are self implementing (i.e., compliance
is required regardless of whether a permit contains the conditions). An updated version of the
regulations can be found at EPA Region 6, web page
. The regulations require all Publicly
Owned Treatment Works (POTWs) servicing a population greater than 10,000 or having a
design flow rate greater than one million gallons per day, or designated as Class I facilities to
submit an annual report to the permitting authority every year on February 19th.
Annual sludge reports required by 40 CFR Parts 503-18, and 503-28, are due to the
regulatory agency by either February 19th or September 1st of each year as specified in your
permit. EPA Region 6, is the sludge regulatory authority for the States of Arkansas, Louisiana,
and New Mexico. If you require assistance for completing the DMRs, or if you have questions
regarding sewage sludge compliance with the Part 503 requirements, please contact the EPA
Regional Sludge Coordinator at 214-665-6475.
Louisiana facilities should note that the Louisiana General Sewage Sludge permit was
published in the federal register on August 21, 1998. The General Permit (LAG65000) can be
found at 63 Fed. Reg. 44961-44984 in the EPA Region 6 web page mentioned above. Louisiana
facilities that have not forwarded "Notice of Intent" for the permit coverage to EPA Region 6,
may be in violation of the permit requirements. Contents of the "Notice of Intent" can be found
in Part IV.B of the General Permit.
The basic set of sludge DMR forms consist of: Production and Use (Outfall SLDP); Land
Application (Outfall SLLA); Surface Disposal (Outfall SLSA); and, Landfilling (Outfall SLDF).
See the permit for additional outfalls required for specific sludge disposal operations. The entire
set of forms must be appropriately completed (with facility name, address, NPDES number and
appropriate monitoring periods) and each form must include an original signature. The original
and one copy of the completed and signed reports must be mailed to the appropriate agency.
FREQUENCY OF ANALYSIS/MONITORING PERIOD
PRODUCTION AND USE FORMS: The reporting year begins on January 1 and ends on
December 31 each year for reports due on February 19th. The reporting year begins on August 1
and ends on July 31st each year for reports due on September 1st.
LAND APPLICATION AND SURFACE DISPOSAL FORMS: Facilities must indicate
the actual frequency that sewage sludge is monitored in the "Frequency of Analysis" column.
The minimum required frequency, indicated in Tables 1 of Parts 503.16 and 503.26, is dependent
on the amount of sludge which is annually land applied or surface disposed, respectively.
A separate report shall be made and completed for EACH MONITORING PERIOD, and
the appropriate monitoring period, dates must be indicated at the top of the DMR form. For
example, if a facility is required to monitor once per quarter, four monitoring reports must be
completed for each full reporting year.
13
-------
In order to aid in processing reports for multiple monitoring periods, facilities should
indicate "Monitoring Period 1, Monitoring Period 2, Monitoring Period 3, etc..." in the
comments section at the bottom of the DMR form for each of the separate reports.
NOTE: Frequency and sample type must be completed on every DMR form,
except when "no discharge" is indicated.
ADDITIONAL REPORTING REQUIREMENTS
In addition to the DMR forms, facilities which land apply or surface dispose of sewage
sludge are responsible for submitting the additional information required in Parts 503.18 or
503.28, respectively; i.e., appropriate certification statements, descriptions of how the
management practices in Parts 503.14 or 503.24 are being met, and descriptions of how the site
restrictions (if applicable) in Part 503.32(b)(5) are being met. This information must be attached
to the original copy of the DMR forms when submitted to the regulatory agency.
Facilities which dispose of sewage sludge by incineration are required to provide the
information required in Part 503.48 in addition to the DMR forms.
COMPLETION OF DMR FORMS
The following instructions are for use in completing the basic set of sludge DMR forms.
All fields must be completed, including frequency of analysis and sample type. This is a
summary of total sludge produced and the amount and method of disposal. All numeric
values must be reported unless "not applicable" is indicated.
PRODUCTION AND USE DMR (SLDP)
This form is to be completed by all major and/or designated Class I facilities which
generate sewage sludge. The annual production and use information must be reported in metric
tons per year (MT/yr); other information shall be in the units indicated. If a particular sludge use
does not apply to the facility's practice, then this must be indicated with a "0".
Storet 39516: Polychlorinated Biphenyls (PCBs) - Facilities which generate or prepare sewage
sludge must indicate the concentration of PCBs (in mg/Kg) in the sludge. This parameter may
be reported as N/A if sludge is not applied to facility during the monitoring period.
Storet 46390: Toxic Characteristic Leaching Procedure (TCLP) - Facilities which generate
or prepare sewage sludge must indicate the results of the TCLP test on the sludge. If the sludge
has passed the test, the form must be indicated with a "0" (Pass). If the sludge does not pass the
test, the form must be indicated with a " 1" (Fail). This parameter may be reported as N/A if
sludge is not applied to facility during the monitoring period.
Storet 49017: Annual Sludge Disposed by Other Methods - Facilities must indicate the
amount of sewage sludge prepared and used or disposed by a method other than land application,
14
-------
surface disposal, incineration or co-disposal in a municipal solid waste landfill. Facilities which
provide sewage sludge to another facility which further prepares the sludge, or changes the
quality of the sludge, prior to land application, must report the amount provided to the other
facility. The method of disposal or use other than those already indicated must be further
described in the "Comments" section of the form. This parameter requires data showing the
annual amount of sludge production and disposal; or, if none, report a zero (0).
Storet 49018: Annual Sludge Incinerated - Facilities must indicate the amount of sewage
sludge prepared and disposed by incineration in a sewage sludge incinerator. This parameter
requires data showing the annual amount of sludge production and disposal; or, if none, report a
zero (0).
Storet 49019: Annual Sludge Production - Facilities must indicate the amount of sewage
sludge produced after final sludge treatment for the reporting period. This parameter requires
data showing the annual amount of sludge production and disposal; or, if none, report a zero (0).
If this parameter shows sludge was produced, the appropriate parameter must be completed
showing how the produced sludge was disposed; i.e.:
1) by other methods (storet 49017) requires stating what method was used in the
comments section),
2) incinerated (storet 49018),
3) land applied (storet 49020) requires values be reported on the SLLA DMR
accordingly. It is important to review your instructions to determine what monitoring frequency
is required if sludge was land applied; i.e.,
a) <290, frequency of analysis for SLLA is once per year
b) 290 to <1500, frequency of analysis for SLLA is once per quarter
c) 1500 to <15,000, frequency of analysis for SLLA is once every two months
d) 15,000 and over, frequency of analysis for SLLA is once per month,
4) surface disposal (storet 49021) requires values be reported on the SLSA DMR
accordingly. It is important to review your instructions to determine what monitoring frequency
is required if sludge was surface disposed; i.e.:
a) <290, frequency of analysis for SLSA is once per year
b) 290 to <1500, frequency of analysis for SLSA is once per quarter
c) 1500 to <15,000, frequency of analysis for SLSA is once every tow months
15
-------
d) 15,000 and over, frequency of analysis for SLSA is once per month,
5) landfilled (storet 49022) requires completion of the SLDF DMR, or
6) transported interstate (storet 49023)
Storet 49020: Annual Sludge Land Applied - Facilities must indicate the amount of sewage
prepared and beneficially reused by land application. Facilities which provide sewage sludge to
another facility which further prepares the sludge prior to land application need not report that
amount of sludge which it has not prepared. This parameter requires data showing the annual
amount of sludge production and disposal; or, if none, report a zero (0).
Storet 49021: Annual Sludge Surface Disposed - Facilities must indicate the amount of sewage
prepared and disposed in a surface disposal unit. This parameter requires data showing the
annual amount of sludge production and disposal; or, if none, report a zero (0).
Storet 49022: Annual Sludge Landfilled - Facilities must indicate the amount of sewage sludge
prepared and co-disposed in a municipal solid waste landfill. This parameter requires data
showing the annual amount of sludge production and disposal; or, if none, report a zero (0).
Storet 49023: Annual Sludge Transported Interstate - Facilities must indicate the amount of
sewage sludge prepared and transported to another state other than the one in which it was
prepared for eventual use or disposal. This parameter requires data showing the annual amount
of sludge production and disposal; or, if none, report a zero (0).
LAND APPLICATION DMR (SLLA)
This form is to be completed by those facilities which prepare bulk sewage sludge for
land application, for beneficial reuse, or sold or given away in a bag or other container. This
form does not apply to those facilities which provide all of their sewage sludge to another facility
which changes the quality of the sludge prior to land application.
NOTE: Modifications to the regulation, published in the October 25, 1995, Federal
Register, removed chromium from the list of regulated pollutants for land application, and
relaxed the limitations for selenium in land applied sludge.
Pollutant Table from 503.13 - The facility must indicate the pollutant table from Part 503.13
which is used to determine compliance with pollutant quality as follows:
Table 2 - Used if bulk sewage sludge exceeds the Pollutant Concentrations of Table 3;
Table 3 - Used if bulk sewage sludge or sewage sludge sold or given away in a bag or
other container of one metric ton or less meets (does not exceed) the Pollutant Concentrations of
Table 3;
16
-------
Table 4 - Used if sewage sludge is sold or given away in a bag or other container of one
metric ton or less, does not meet the Pollutant Concentrations of Table 3, and contains a label or
information sheet indicating an annual whole sludge application rate which does not cause any of
the Annual Pollutant Loading Rates in Table 4 to be exceeded.
Metals - The information to be included in this portion of the form consists of three types:
1) The cumulative loadings of the metals for a particular site (Kg/Ha);
2) The monthly average concentrations of metals (mg/Kg); and,
3) The maximum concentrations of the metals (mg/Kg).
All facilities which land apply bulk sewage sludge, sell, or give away sewage sludge in a
bag or other container for land application must indicate the maximum concentration for all
metals during the monitoring period in the "Maximum Concentration" column. These
concentrations are limited by the values of Table 1 of Part 503.13.
The "Average Concentration" information must be completed by those facilities whose
sludge meets the Table 3 Pollutant Concentrations. This information must reflect the monthly
average concentration during the monitoring period. Facilities which do not use the Pollutant
Concentration limits for compliance must indicate this column with "0" to reflect "Not
Applicable".1
For those facilities whose sludge does not meet the Pollutant Concentrations of Table 3
and which are subject to the cumulative loading rates of Table 2, the cumulative loading of the
metals at a site must be reported in the "Maximum Loading" columns if the loading rate has
reached 90% or more of the maximum rate allowed by Table 2 of Part 503.13. If the facility has
more than one application site, then this form must be included for each site which has reached
90% or more of the maximum rate allowed. Facilities which do not use the cumulative loading
rates must indicate this column with a "0" to reflect "Not Applicable".1
Level of Pathogen Requirement Achieved - Facilities must indicate the level of pathogen
requirements achieved, if any. If the sludge meets the Class A requirements, the form must be
indicated with a " 1". If the sludge meets the Class B requirements, the form must be indicated
with a "2". If the facility's sludge does not meet either the Class A or Class B levels, the facility
must report "0" (None).
Pathogen Alternative Used - Facilities must indicate which alternative number is used to
achieve the pathogen level indicated above. The alternative numbers are given in Part
503.32(a)(3) - (8) for Class A (#1-6) and Part 503.32(b)(2) - (4) for Class B (#1-3). For those
facilities which have been issued a permit containing the new requirements under Part 503, the
alternative numbers are
For purposes of reporting sludge concentration and loading, analytical values below detection limit shall
be reported as "< x", where "x" represents the detection limit.
17
-------
given in Section I.B.3. of the permit. If the facility's sludge does not meet either of the pathogen
reduction levels, it must report "0".
Vector Attraction Reduction Alternative Used - Facilities must indicate which alternative was
used to achieve the vector attraction reduction requirement. The alternative numbers which
apply to land application (#1-10) are given in Part 503.33(b)(1) - (10). For those facilities which
have been issued a permit containing the new requirements under Part 503, the alternative
numbers for vector attraction reduction are given in Section I.B.4. of the permit. If a facility is
unable to meet any of the vector attraction reduction alternatives, it must report "0".
Annual Whole Sludge Application Rate - Facilities whose sewage sludge does not meet the
Pollutant Concentrations of Table 3, which sell or give away sludge in a bag or other container
as defined by Part 503, and which include (with the sludge) a label or information sheet
containing an annual whole sludge application rate which does not cause any of the annual
pollutant loading rates in Table 4 to be exceeded, must include that rate in this portion of the
form. If this information does not apply to the facility, then it must indicate "0" to reflect "Not
Applicable".
This DMR must be completed with values if any value other than "0" was shown on the SLDP
DMR for parameter with storet 49020. If parameter storet 49020 on the SLDP DMR was
reported as "0", the No Discharge box should be marked at the upper right portion of the DMR.
SURFACE DISPOSAL DMR (SLSA)
Storet 49028: Unit With Liner/Leachate Collection System - Facilities must indicate the
presence of a liner and leachate collection system in the surface disposal unit. A unit with a liner
is indicated with "1" (Yes). A unit without a liner is indicated with "0" (No).
Storet 49029: Unit Boundary to Property Line - Facilities whose sewage sludge unit does not
have a liner and leachate collection system must indicate the actual minimum distance (in
meters) from the sewage sludge unit boundary to the property line of the surface disposal site.
Storets 78469 and 78473: Metals Concentrations - Facilities whose sewage sludge unit does
not have a liner and leachate collection system must indicate the allowed pollutant
concentrations for Arsenic, Chromium and Nickel from Tables 1 or 2 or Part 503.23., based on
the unit boundary to property line distance. The allowed concentration must be entered into the
"Average Concentration" column of the form. The actual maximum concentration measured by
the permittee must be entered into the "Maximum Concentration" column of the form.
Facilities whose sewage sludge unit has a liner and leachate collection system need not
indicate the pollutant concentrations but must indicate "0" to reflect "Not Applicable" in both the
Average (allowed) and Maximum (actual) columns for the three pollutants.
Storet 84368: Level of Pathogen Requirement Achieved - See Land Application procedures
above.
18
-------
Storet 84369: Pathogen Alternative Used - See Land Application procedures above.
Storet 84370: Vector Attraction Reduction Alternative Used - Facilities must indicate which
alternative was used to achieve the vector attraction reduction requirement. The alternative
numbers which apply to surface disposal (#1 through #11) are given in Part 503.33(b)(1) - (11).
For those facilities which have been issued a permit containing the new requirements under
Part 503, the alternative numbers for vector attraction reduction are given in Section I.B.4. of the
permit. If a facility is unable to meet any of the vector attraction reduction alternatives, it must
report "0".
This DMR must be completed with values if any value other than "0" was shown on the SLDP
DMR for parameter with storet 49021. If parameter storet 49021 on the SLDP DMR was
reported as "0", the No Discharge box should be marked at the upper right portion of the DMR.
LANDFILLING DMR (SLDF)
Storet 49030: In Compliance With Part 258 Requirements for Sludge - Facilities which
generate sewage sludge that is co-disposed in a municipal solid waste landfill must indicate
whether the sludge meets the requirements of 40 CFR Part 258 (passes TCLP and paint filter
test). If the facility's sludge meets the requirements, it must report "1" (Yes). If the facility's
sludge does not meet the requirements, it must report "0" (No).
This DMR must be completed if any value other than "0" was shown on the SLDP DMR for
parameter 49022. If parameter 49022 on the SLDP DMR was reported as "0", the No Discharge
box should be marked at the upper right portion of the DMR.
19
-------
VIII. BIOMONITORING/TOXICITY
The Permittee must test the effluent for toxicity in accordance with the provisions specified in
their permit. Such testing will determine if an effluent sample dilution affects the survival,
reproduction or growth of the appropriate test organism.
1. VALID TEST. A valid test must be performed and data submitted on a Discharge
Monitoring Report (DMR) for each species required to be tested during the monitoring
period specified in the permit. A valid test is defined as any test which satisfies the test
acceptability criteria, procedures, and quality assurance requirements specified in the test
methods and permit. All reports, tables, plans, summaries, and related correspondence
required by your permit shall be prepared and/or submitted to the appropriate regulatory
agency (EPA or State).
2. DMRS. If Agency provided preprinted DMRs have not been received for the initial
test, or if the permittee has other questions regarding the monitoring periods, parameter
codes, etc., the regulatory agency should be contacted for instructions. Discharge
Numbers for Toxicity DMRs, such as TX1 A, TX2Q, TX3Y, etc, are identified usually as
follows:
TX - indicates Toxicity reporting;
1, 2 or 3 - indicates which outfall is being tested for toxicity.
A, Q or Y - indicates if a test is to be conducted monthly (A), quarterly (Q) or
yearly (Y).
Toxicity data is reported on the appropriate DMRs, for example:
Pass/Fail (1 = Failure, 0 = Pass),
NOEC value for Survival (Percent),
NOEC value for Reproduction (Percent),
% Mortality at Critical Dilution (Percent),
% Coefficient of Variation (Percent), etc.
3. INVALID TEST. An invalid test is defined as any test which does not satisfy the test
acceptability criteria, procedures, and quality assurance requirements specified in the test
methods and permit. A REPEAT Test shall be conducted within the reporting period of
any test determined to be invalid.
4. RE TESTS. The permittee shall perform a total of two (2) additional tests (Retests) as a
result of a previously failed test. The retests shall be conducted as outlined in the permit.
If one or both of the two retests demonstrates significant lethal effects at or below the
critical dilution, the permittee shall initiate Toxicity Reduction Evaluation (TRE)
requirements as specified in the permit.
5. TRE. A TRE is an investigation intended to determine those actions necessary to
achieve compliance with water quality-based limits by reducing an effluent's toxicity to
an acceptable level. The permittee shall submit a Action Plan and Schedule for
conducting the TRE. The Action Plan shall specify the approach and methodology to be
20
-------
used in performing the TRE. The permittee shall submit quarterly activity reports
concerning the progress of the TRE.
Based upon the results of the TRE and proposed corrective actions, the permit may be
amended to modify the biomonitoring requirements where necessary, to require a
compliance schedule for implementation of corrective actions, to specify a Whole
Effluent Toxicity (WET) limit, to specify a Best Management Practice (BMP), and/or to
specify Chemical Specific Effluent Limits.
6. WET. Failure to identify the specific chemical compound causing toxicity test failure
will normally result in a WET permit limit and will be reported on a DMR as Parameter
22414.
21
-------
IX. CONCENTRATED ANIMAL FEEDING OPERATION
www.epa.gov/region6/6en/w/cafo
The EPA Region 6 CAFO General Permit became effective March 10, 1993, and expired on
midnight of March 10, 1998. A draft permit was published on June 26, 1998, and the public
comment period was open through August 25, 1998, but the draft permit has not been finalized.
Facilities with permit coverage as of March 10, 1998, have administratively extended permit
coverage until a new permit is issued. New facilities may not apply for coverage under the
expired 1993 general permit.
The CAFO Final Rule became effective upon it being signed by the Administrator on
December 15, 2002. You can find the entire rule and associated information on the Office of
Water's CAFO WEB Page.
22
-------
X. STORM WATER
Website instructions for completing multi-sector general permit DMRs can be found at:
www.epa.g0v/region6/6en/w/dmr.htm
23
-------
XL OFFSHORE GENERAL PERMIT GMG290000
Website instructions for completing offshore DMRs can be found at:
www.epa.gov/region6/6en/w/offshore/dmrinstructions.htm
24
-------
XII. MOST COMMONLY ASKED QUESTIONS
1. How do I report "too numerous to count" (TNTC) coliform samples?
A. Using Standard Methods 9222 D, 18th - 20th Edition
If the Standard Methods 9222 D analysis procedure results in a colony count greater than 60, or
is not distinct enough for accurate counting, on the membrane with the smallest filtration
volume, report TNTC on the DMR form if only a single sample was collected for the reporting
period (i.e. once a week sample for the 7-day geometric mean or a Daily Maximum). A TNTC
reported on the DMR exceeds the permit limit and is considered a permit violation. However,
actual numbers are required by the permit and should be reported whenever possible, and a
broader dilution range should be adopted to ensure that a reportable fecal coliform count is
obtained in future samples.
However, when calculating the 30-day geometric mean or a 7-day geometric mean with multiple
sample results within each reporting period, the TNTC fecal coliform plate sample should be
estimated as a ">" (greater than) value by dividing 60 by the smallest filtration value by using
the following formula:
No. of Fecal Coliform Colonies Counted X 100 = Fecal coliform count /100 mL
Volume in mL of Sample Filtered
i.e., for a 0.1 mL volume filtered 60/0.1 x 100 = 60,000
Calculate as: >60,000 fecal coliforms/100 mL.
Example based on a 7x/week sampling schedule, using the optimum range for colony plate count
(20 - 60 colonies) and sample filtration volumes of 100 mL, 10 mL, 1.0 mL, and 0.1 mL (the
smallest filtration volume of 0.1 mL):
Monday 200 colonies (20 colonies/10 mL x 100 = 200 colonies/100 mL)
Tuesday 600 colonies (60 colonies/10 mL x 100 = 600 colonies/100 mL)
Wednesday TNTC = >60,000 colonies based on smallest filtration volume of 0.1 mL
and using 60 colonies as the basis of calculation
Thursday 3000 colonies (30 colonies/1.0 mL x 100 = 3000 colonies/lOOmL)
Friday 500 colonies (50 colonies/10 mL x 100 = 500 colonies/100 mL)
Saturday 400 colonies (40 colonies/10 mL x 100 = 400 colonies/100 mL)
Sunday 200 colonies (20 colonies/10 mL x 100 = 200 colonies/100 mL)
The 7-day fecal coliform geometric mean would be calculated by multiplying the seven values
200 x 600 x 60,000 x 3000 x 500 x 400 x 200 and taking the seventh root of the multiplication
factor which equals 979. If (as in this case) the geometric mean contained 1 or more greater than
(>) values, the final average should be reported as >979.
25
-------
B.
Using EPA Method, page 124
If the EPA method Part III. Section C Fecal Coliform Methods (page 124) analysis procedure
results in uncountable membranes with more than 60 colonies, use 60 colonies as the basis of
calculation with the smallest filtration volume as illustrated above. A TNTC report is not
allowed, but rather the result is reported as a ">" value by dividing 60 by the smallest filtration
value, i.e.. 0.1 mL:
60/0.1 x 100 = 60,000
Calculate and/or report as: >60,000 fecal coliforms/100 mL.
Again, a broader dilution range may need to be adopted to ensure that a reportable fecal coliform
count is obtained in future samples
2. How do I count number of exceedance?
If daily maximum/daily minimum, count each sample that is below and/or above the
minimum/maximum limit.
If a 7-day average or weekly limit, every 7-day average which exceeds the limit in the
permit shall be counted as one exceedance.
DO NOT INCLUDE 30-DAY AVERAGES OR DAILY AVERAGES AS
EXCEEDANCES ON DMR. This exceedance is already included in the above
calculations.
3. How do I calculate and report 7-day averages?
We recognize that calendar weeks and calendar months rarely coincide. Therefore, for
the purpose of calculating and reporting 7-day averages, you should follow the process
below:
a. Define your week (SUN-SAT, MON-SUN, etc.).
b. Calculate the averages of all sample data obtained for each week.
c. The highest calculated weekly average will be reported on the DMR for the
month in which (1) the week ends or (2) the week begins, or (3) the month which
contains the greatest number of days. It is the choice of the facility. However,
the choice should be consistent month to month, year to year. SET A RULE
AND STICK WITH IT.
4. Who can sign a DMR?
The definition of authorized signatory official can be found in your permit, and in the
regulations at 40 CFR 122.22 and 40 CFR 403.6(a)(2)(ii). In general, it is a responsible
26
-------
corporate official (e.g., officer of the corporation), partner, sole proprietor, or, for a
governmental entity, a principal executive officer or ranking elected official. See the
permit or regulations for the complete definition.
Can signatory authority be delegated? Yes. A duly authorized representative
of a signatory official may also sign DMRs, or other NPDES reports, if such
authorization has been made in writing by an authorized signatory official. The
authorization must specify either an individual or a position having responsibility
for the overall operation of the regulated facility or activity, it must be submitted
to the permitting authority, and it must be certified by an authorized signatory
official. See 40 CFR 122.22(b). Additionally, a sample delegation letter is
available online and linked off of the following web page:
www.epa.g0v/region6/6en/w/dmr.htm.
5. Do I have to sign each page of my DMR?
Yes. Each page must be signed. If any revisions are submitted, that revised page must
also have an original signature and new signature date.
6. Do I send copies of State DMRs to EPA (Texas only)?
No, and you do not need to send copies of EPA DMRs to TCEQ.
7. Do I have to send a copy of a non-compliance report for my state permit to EPA?
No. Copies of state required reports are not required to be submitted to EPA.
8. I received a letter from EPA telling me that the State has NPDES authority. Do I
have to send any more reports to EPA?
Once you have received a letter from EPA transferring enforcement authority for your
facility to an approved NPDES state, you no longer need to send DMRs, non-compliance
reports, etc., to EPA, unless you receive a specific request or action from EPA.
9. How do I report effluent data below detection limit?
Unless otherwise stated in the permit, values below the detection limit are to be reported
with a less than symbol ( < ) and the numeric value for the detection limit using the EPA
approved method.
Where the permit contains a listing of Minimum Quantification Levels (MQLs) and the
permittee is granted authority in the permit to report zero in lieu of the
-------
Where authority has not been granted to report zero, the less than MQL values are to be
averaged with the numbers greater than the MQL and report the calculated average using
the less than symbol.
For Example: MQL is 3 mg/L, 4 sample results in a month: <3, 5, <3, 7.
The Monthly Average = (3 + 5 + 3 +1)14 =4.5
Report on the DMR for Monthly Average as "<4.5"
Some permittees have complained that the MQL concentration for a parameter results in
a loading calculation they believe is higher than they actually have. Unless one of the
provisions discussed above applies, allowing you to use "0" for your calculation, you are
to use the MQL concentration for calculating the loadings for results that are below the
MQL. The only way to improve the loadings calculation is to switch to another approved
method that has a lower MQL.
How do I round numbers and ratios?
Permits sometimes require the rounding of numbers or ratios. These numbers or ratios
should be rounded as follows:
(1) If the digit 6, 7, 8, or 9 is dropped, increase preceding digit by one unit.
Example: a calculated parameter of 1.06 should be rounded to 1.1 and
reported as a violation of the permit limit if the permit limit is 1.0.
(2) If the digit 0, 1, 2, 3, or 4 is dropped, do not alter the preceding digit.
Example: a calculated parameter of 1.04 should be rounded to 1.0 and
reported to EPA as compliant with the permit limit if the permit limit is
1.0.
(3) If the digit 5 is dropped, round off preceding digit to the nearest even number.
Example: a calculated ratio of 1.05 should be rounded to 1.0 and reported
to EPA as compliant with the permit limit if the permit limit is 1.0.
This method of rounding numbers and ratios is consistent with the EPA rounding method
recommended by EPA Headquarters' L. Y. Boornazian and M. T. Flores Oct 10, 2003,
memo.
28
-------
XII. MISCELLANEOUS
A. Math Formulas
B. Fecal Coliform - How to Calculate
C. Metric System
D. Population Equivalent
E. Compounds/Pesticides
F. Frequency of Analysis
G. Sample Types
H. Definitions and Calculations for DMRs
29
-------
A. MATH FORMULAS
CONVERSION FACTORS:
1 gallon = 8.34 lbs. (estimate that varies slightly with temperature)
1 cu. ft. = 7.4805195 gallons
1 acre = 43,560 sq. ft.
1 ft. head = 0.43 PSI
u = 3.14159
FORMULAS:
1. Area of a Rectangle (square units)
Length X Width = Area
2. Area of a circle (square units)
71 X radius2 = Area or .785 X Diameter2
3. Volume of rectangular or circular container (clarifier, pond, pipe, etc.)
Surface Area X Depth = Volume (cu. units)
4. Volume in Gallons
Volume in cu. ft. X 7.48 = gallons
5. Detention Time
Volume (gals.')
Flow (gpm) = Detention Time (in minutes)
NOTE: If flow is in gpd, detention time is in days.)
30
-------
Circumference of a Circle
71 X Diameter = Circumference
BOD (mg/L)
(Initial P.O. - Final P. 0/) X 100
% Dilution = BOD (mg/L)
OR
(Initial D O. - Final D O.) X Dilution Facor = BOD
TOTAL VOLUME
Dilution Factor = SAMPLE VOLUME
8. Suspended Solids (mg/L)
Weight, firm) - Weight, firm) X 1000
mL of Sample Filtered
9. Pounds of BOD, Solids, Chemicals
Concentration (mg/L) X Quantity (million gals.) X 8.34 = lbs.
NOTE: Quantity, Volume or Flow must be in million gals.
10. Weir Overflow Rate
GPP
Length of Weir = gal./ft/day
11. Surface Loading Rate
GPP
Surface Area = gal./sq.ft./day
31
6.
7.
-------
B FECAL COLIFORM
HOW TO CALCULATE GEOMETRIC MEAN
Determine the optimum number of colonies per plate based on the series of dilutions. The
acceptable range is usually 20 to 60 colonies. If it is too dense to count refer to Section XII for
directions on reporting TNTC.
There are two methods by which to calculate the geometric mean (GM). Method One is the
product of all the values (nl x n2 x n3 ) followed by taking the nth root of the multiplication
factor, and Method Two is to average the sum of the logs (log nl + log n2 + log n3 ) followed
by the antilog of the average.
The following example is based on a 7x/week sampling schedule, using the optimum range for
colony plate count (20 - 60 colonies) and sample filtration volumes of 100 mL, 10 mL, 1.0 mL,
and 0.1 mL (the smallest filtration volume being of 0.1 mL):
Monday 20 colonies (20 colonies/100 mL x 100 = 20 colonies/100 mL)
Tuesday 60 colonies (60 colonies/100 mL x 100 = 60 colonies/100 mL)
Wednesday 45 colonies (45 colonies/100 mL x 100 = 45 colonies/100 mL)
Thursday 300 colonies (30 colonies/10 mL x 100 = 300 colonies/lOOmL)
Friday 550 colonies (55 colonies/10 mL x 100 = 550 colonies/100 mL)
Saturday 42 colonies (42 colonies/100 mL x 100 = 42 colonies/100 mL)
Sunday 27 colonies (27 colonies/100 mL x 100 = 27 colonies/100 mL)
Using the Method One Formula
GM = "nth" root of nl x n2 x n3
The 7-day fecal coliform geometric mean would be calculated by multiplying the seven values
20 x 60 x 45 x 300 x 550 x 42 x 27 and taking the seventh root of the multiplication product
which yields a geometric mean of 72.
Using the Method Two Formula
X = Sum of the Log for Sample Measurements
# samples
Then take the anti-log of X to obtain the GM.
32
-------
The 7-day fecal coliform geometric mean would be calculated by adding the sum of the logs for
each value (log 20 = 1.30103 + log 60 = 1.77815 + log 45 = 1.65321 + log 300 = 2047712 + log
550 = 2074036 + log 42 = 1.62325 + log 27 = 1.43136) , dividing the summation of 13.00448 by
7 = 1.85778, followed by the anti-log of the result which also yields a geometric mean of 72.
How to Average "<" Daily Max or 7-Day Averages into the 30-Day Average
For samples that have a value of "0 colonies" on a plate count, the value must be reported as
less than (calculated value) /100 mL, based upon the largest single volume filtered. For
example, if 10 mL, 1.0 mL and 0.1 mL are filtered and all plates show zero counts, select the
largest volume, and apply the general formula for determining fecal coliform counts at various
dilutions and report the count as < (less than) value.
_J x 100 = <10 fecal coliforms / 100 mL
10
If the geometric mean for a reporting period (i.e., the 7-day average or 30-day average) has a
sample with a zero count, use the above formula to obtain a "< fecal coliform count", and
average that number (i.e. 10 from the above example) with the other samples taken.
33
-------
C. METRIC SYSTEM
Prefix
Kilo
Hecto
Deca (Deka) -
(Unit)
Deci
Centi
Milli
Micro
Value
1000
100
10
1
0.1 (1/10)
0.01 (1/100)
0.001 (1/1000)
0.000001 (1/1,000,000)
Example
1 Kilogram
1 Hectogram
1 Gram
1 Decigram
1 Centigram
1 Milligram
1 Microgram
1000 Grams
100 Grams
1 Decagram (Dekagram)= 10 Grams
= 1 Gram
= 0.1 Gram
= 0.01 Gram
= 0.001 Gram
= 0.000001 Gram
METRIC SYSTEM CONVERSION FACTORS
1 pound
1 ounce
1 gallon
1 quart
1 inch
1 foot
1 mile
453.6 grams
28.35 grams
3.785 liters
0.946 liter
25.4 millimeter
0.305 meters
1.609 kilometers
34
-------
D. POPULATION EQUIVALENT
Population
Equivalent
Average BOD fmg/L) X Average Flow (MOD) X 8.34
.17 lbs/person/day
Average BOD will consist of a minimum of four (6 hour composite) samples taken at least
5 days apart.
Average flow will be the average of at least 20 days within a 30-day period.
Example: If your average BOD is 200 mg/L and your average flow is 1.0 MGD
Pop. Eq. = 200 X 1.0 X 8.34 = 9,812 people
.17
35
-------
E. COMPOUNDS/PESTICIDES
VOLATILE COMPOUNDS MOL (ug/L)
Acrolein 50
Acrylonitrile 50
Benzene 10
Bromoform 10
Carbon Tetrachloride 10
Chlorobenzene 10
Chi orodibromom ethane 10
Chloroethane 50
2-Chloroethyl Vinyl Ether 10
Chloroform 10
Dichlorobromom ethane 10
1,1 -Di chl oroethane 10
1,2-Dichloroethane 10
1,1 -Di chl oroethy 1 ene 10
1.2-Dichloropropane 10
1.3-Dichloropropylene 10
Ethylbenzene 10
Methyl Bromide (Bromomethane) 50
Methyl Chloride (Chloromethane) 50
Methylene Chloride 20
1,1,2,2-Tetrachl oroethane 10
T etrachl oroethy 1 ene 10
Toluene 10
1,2-trans-Dichloroethylene 10
1,1,-Tri chl oroethane 10
1,1,2-Tri chl oroethane 10
Trichloroethylene 10
Vinyl Chloride 10
ACID COMPOUNDS MOL (ug/L
2-Chlorophenol 10
2,4-Dichlorophenol 10
2,4-Dimethylphenol 10
4,6-Dinitro-o-Cresol [2-Methyl-4,6-Dinitrophenol] 50
2,4-Dinitrophenol 50
2-Nitrophenol 20
4-Nitrophenol 50
p-Chloro-m-Cresol [4-Chloro-3-Methylphenol] 10
Pentachlorophenol 50
Phenol 10
2,4,6-Trichlorophenol 10
36
-------
ACID COMPOUNDS (CONT'D)
3,3'-Dichlorobenzidine
50
Diethyl Phthaate
10
Dimethyl Phthalate
10
Di-n-Butyl Phthalate
10
2,4-Dinitrotoluene
10
2,6-Dinitrotoluene
10
Di-n-octyl Phthalate
10
1,2-Diphenylhydrazine
20
Fluoranthene
10
Fluorene
10
Hexachl orob enzene
10
Hexachl orobutadi ene
10
Hexachl orocy cl opentadi ene
10
Hexachl oroethane
20
Indeno(l,2,3-cd) [2,3-o-Phenylene Pyrene]
20
Isophorone
10
Naphthalene
10
Nitrobenzene
10
n-Nitrosodimethylamine
50
n-Nitro sodi -n-Propy 1 amine
20
n-Nitrosodiphenylamine
20
Phenanthrene
10
Pyrene
10
1,2,4-Trichlorobenzene
10
PESTICIDES MOL (ug/L)
Aldrin
0.05
Alpha-BHC
0.05
Beta-BHC
0.05
Gamma-BHC [Lindane]
0.05
Delta-BHC
0.05
Chlordane
0.2
4,4'-DDT
0.1
4,4'-DDE [p,p-DDX]
0.1
4,4'-DDD [p,p-TDE]
0.1
Dieldrin
0.1
Alpha-Endosulfan
0.1
Beta-Endosulfan
0.1
Endosulfan Sulfate
0.1
Endrin
0.1
Endrin Aldehyde
0.1
37
-------
PESTICIDES (CONT'D)
Heptachlor 0.05
Heptachlor Epoxide [BHC-Hexachlorocyclohexane] 0.05
PCB-1242 1.0
PCB-1254 1.0
PCB-1221 1.0
PCB-1232 1.0
PCB-1248 1.0
PCB-1260 1.0
PCB-1016 1.0
Toxaphene 5.0
BASE/NEUTRAL COMPOUNDS MOL (ug/L)
Acenaphthene 10
Acenaphthylene 10
Anthracene 10
Benzidine 50
Benzo(a)anthracene 10
B enzo(a)py rene 10
3,4-Benzofluoranthene 10
Benzo(ghi)perylene 20
Benzo(k)fluoranthene 10
Bis(2-chloroethoxy) Methane 10
Bis(2-chloroethyl) Ether 10
Bis(2-chlorisopropyl) Ether 10
Bis(2-ethylhexyl) Phthalate 10
4-Bromophyenyl Phenyl Ether 10
Butyl Benzyl Phthalate 10
2-Chloronapthalene 10
4-Chlorophyenyl Phenyl Ether 10
Chrysene 10
Dibenzo(a,h)anthracene 20
1.2-Dichlorobenzene 10
1.3-Dichlorobenzene 10
1.4-Dichlorobenzene 10
NOTE: You may utilize these MQLs in association with the most appropriate test method
approved at 40 CFR Part 136 for all future monitoring performed under your current Pollutant
Discharge Elmination System permit. Exceptions to using this list as a benchmark for
quantifiable values will be those cases where your current permit specifies other quantification
levels or where you have demonstrated to the satisfaction of the regulatory authority that you are
unable to achieve a level of analytical sensitivity equivalent to the MQL.
38
-------
F. FREOUENCY OF ANALYSIS
FREOUENCY
DESCRIPTION
FREOUENCY
DESCRIPTION
N/A
NOT APPLIC
01/5Y
ONCE/5 YEARS
N/R
NOT REPORTD
01/60
ONCE/2 MONTHS
N/V
NOT VALID
01/7M
ONCE/7 MONTHS
CL/OC
CHLRNTN/OCCURS
01/90
QUARTERLY
DL/DS
DLY WHNDISCHRG
01/99
INS TNT
REPRT
REPORT
02/BA
TWICE/BATCH
WH/DS
WHEN DISCHRG
02/DS
TWICE/DISCH
WH/MN
MEASRD WHN MON
02/DW
TWICE/D S CHWK
01/BA
ONCE/BATCH
02/SH
TWICE/SHIFT
01/DD
ONCE/DSCHDY
02/YR
SEMI-ANNUAL
01/DM
ONCE/DSCHMN
02/01
TWICE/DAY
01/DQ
ONCE/DSCHQTR
02/07
TWICE/WEEK
01/DS
ONCE/DISCHG
02/12
TWICE/12 DAYS
01/DW
ONCE/DSCHWK
02/30
TWICE/MONTH
01/RN
ONCE/RN EVNT
02/90
TWICE/QTRLY
01/SH
ONCE/SHIFT
02/99
SEE PERMIT
01/SN
ONCE/SEASON
03/BA
THREE/BATCH
01/YR
ANNUAL
03/DS
THREE/DISCHG
01/01
DAILY
03/DW
3 DAYS/WEEK
01/02
ONCE/2 DAYS
03/YR
THREE/YEAR
01/03
ONCE/3 DAYS
03/01
THREE/DAY
01/04
ONCE/4 DAYS
03/05
THREE/5 DAYS
01/05
ONCE/5 DAYS
03/07
THREE/WEEK
01/06
ONCE/6 DAYS
03/08
THREE/8 DAYS
01/07
WEEKLY
03/30
THREE/MONTH
01/08
ONCE/8 DAYS
03/5Y
THREE/5 YEARS
01/09
ONCE/9 DAYS
03/99
SEE PERMIT
01/10
ONCE/10 DAYS
04/BA
FOUR/BATCH
01/11
ONCE/11 DAYS
04/01
FOUR/DAY
01/12
ONCE/12 DAYS
04/07
FOUR/WEEK
01/13
ONCE/13 DAYS
04/30
FOUR/MONTH
01/14
ONCE/2 WEEKS
04/99
SEE PERMIT
01/21
ONCE/3 WEEKS
05/BA
FIVE/BATCH
01/28
ONCE/4 WEEKS
05/DW
5 DAYS/WEEK
01/30
ONCE/MONTH
05/WK
5 TIMES/WEEK
01/4M
ONCE/4 MONTHS
05/01
5 TIMES/DAY
01/5M
ONCE/5 MONTHS
05/07
WEEK-DAYS
39
-------
FREQUENCY DESCRIPTION
05/08
FIVE/8 DAYS
05/30
5 TIMES/MONTH
05/90
FIVE/QRTLY
05/99
SEE PERMIT
06/SH
SIX/OPRSHIFT
06/01
SIX/DAY
6/07
SIX/WEEK
06/30
6 TIMES/MONTH
06/99
SEE PERMIT
07/30
7 TIMES/MONTH
07/99
SEE PERMIT
08/BA
EIGHT/BATCH
08/01
EIGHT/DAY
08/30
EIGHT/MONTH
08/99
SEE PERMIT
09/01
NINE/DAY
09/30
NINE/MONTH
FREOUENCY
DESCRIPTION
09/99
SEE PERMIT
10/30
TEN/MONTH
10/99
SEE PERMIT
12/01
TWELVE/DAY
12/30
12 PER MONTH
15/30
FIFTEEN/MONTH
16/01
SIXTEEN/DAY
16/30
SIXTEEN/MONTH
18/01
EIGHTEEN/DAY
18/30
EIGHTEEN/MONTH
24/01
HOURLY
48/01
EVERY y2 HR
66/66
WPC PLAN
77/77
CONTIN-GENT
88/88
CLEANING
99/99
CONTINUOUS
40
-------
G. SAMPLE TYPES
SAMPLE DESCRIPTION SAMPLE
CA
CALCTD
RF
CN
CONTIN
RG
CP
COMPOS
RP
CR
CK REQ
RT
CS
CORSAM
R4
CT
CERTIF
SR
CU
CURVE
SS
DA
DAILAV
ST
DS
DISCRT
TI
ES
ESTIMA
TM
FI
FLOIND
VI
GH
5GR24H
01
GM
GRAB 10
02
GR
GRAB
03
G2
GRAB-2
04
G3
GRAB-3
05
G4
GRAB-4
06
G5
GRAB-5
08
G6
GRAB-6
1H
G7
GRAB-7
10
G8
GRAB-8
12
G9
GRAB-9
16
IM
IMERSN
2H
IN
INSTAN
20
IS
INSITU
22
IT
IMRSTB
24
MC
MATHCL
28
MP
MATHCP
3G
MS
MEASRD
4C
MT
METER
4H
NA
NOT AP
5G
NR
NOTRPT
72
OC
OCCURS
96
PC
PMPCRV
SB
PL
PMPLOG
RC
RCORDR
RD
RNG-DA
DESCRIPTION
RCDFLO
RANG-C
REPRES
RCOTOT
RNG-4A
SGLRDG
STAT-SH
STATIC
TIMEMT
TOTALZ
VISUAL
COMP-1
COMP-2
COMP-3
COMP-4
COMP-5
COMP-6
COMP-8
AVG-1H
COMPIO
COMP12
COMP16
AVG-2H
COMP20
BATCH
COMP24
COMP28
3GR/HR
4DA24C
AVG-4H
5GR45M
COMP72
COMP96
SEQBAR
41
-------
H. DEFINITIONS AND CALCULATIONS FOR
DISCHARGE MONITORING REPORTS
1. Definitions
The following are definitions of some terms used for reporting on the Discharge Monitoring Report (DMR).
Annual Average Flow The arithmetic average of all daily flow determinations taken within the
preceding 12 consecutive calendar months. The annual average flow
determination shall consist of daily flow volume determinations made
by a totalizing meter, charted on a chart recorder and limited to major
domestic wastewater discharge facilities with a 1 million gallons per
day or greater permitted flow.
Daily Average Flow The arithmetic average of all determinations of the daily discharge
within a period on one calendar month. The daily average flow
determination shall consist of determinations made on at least four
separate days. If instantaneous measurements are used to determine the
daily discharge, the determination shall be the arithmetic average of all
instantaneous measurements taken during that month. Daily average
flow determination for intermittent discharges shall consist of a
minimum of three flow determinations on days of discharge.
Daily Maximum Flow
Instantaneous Flow
2-hour Peak Flow
Maximum 2-hour Peak Flow
The highest total flow for any 24-hour period in a calendar month.
The measured flow during the minimum time required to interpret the
flow measuring device.
Applies to domestic wastewater treatment plants: The ;maximum flow
sustained for a two-hour period during the period of daily discharge.
Multiple measurements of instantaneous maximum flow within a two-
hour period may be compared to the permitted 2-hour peak flow.
Applies to domestic wastewater treatment plants: The highest 2-hour
peak flow for any 24-hour period in a calendar month.
Daily Average Concentration The arithmetic average of all effluent samples, composite or grab as
required by the permit, within a period of one calendar month,
consisting of at least four separate representative measurements. When
four samples are not available in a calendar month, the arithmetic
average of the four most recent measurements or the arithmetic average
(weighted by flow) of all values taken during the month shall be used as
the daily average concentration.
7-day Average Concentration The arithmetic average of all effluent samples, composite or grab as
required by the permit, within a period of one calendar week, Sunday
through Saturday.
Daily Maximum Concentration The maximum concentration measured on a single day, by composite
sample unless otherwise specified in the permit, within a period of one
calendar month.
Fecal Coliform Bacteria The number of colonies of fecal coliform bacteria per 100 milliliters
42
-------
Concentration effluent. The fecal coliform bacteria daily average is a geometric mean
of the values for the effluent samples collected in a calendar month.
The geometric mean shall be determined by calculating the nth root of
the product of all measurements made in a particular period of time.
For example in a month's time, where n equals the number of
measurements made; or, computed as the antilogarithm of the
arithmetic average of the logarithms of each measurement made. For
any measurement of fecal coliform bacteria equaling zero, a substituted
value of one shall be made for input into either computation method.
Composite Sample For domestic wastewater, a sample made up of a minimum of three
effluent portions collected in a continuous 24-hour period or during the
period of daily discharge if less than 24 hours, and combined in
volumes proportional to flow, and collected no closer than two hours
apart. For industrial wastewater, a composite sample is a sample made
up of a minimum of three effluent portions collected in a continuous
24-hour period or during the period of daily discharge if less than 24
hours, and combined in volumes proportional to flow, and collected no
closer than one hour apart.
Grab Sample An individual sample collected in less than 15 minutes.
2. Example Calculations and Reporting for Concentration, Loading, Flow, Cl2 Residual and pH
The example calculations and reporting instructions described in this section are illustrated using data in the
following chart titled "Example Daily Operations Log for March."
43
-------
EXAMPLE DAILY OPERATIONS LOG FOR MARCH
Day of Week
Date
Flow (MGD)
BOD
(mg/L)
TSS (mg/L)
pH (s.u.)
CL2 (mg/L)
bod5
(lbs/dy)
TSS
(lbs/dy)
Sunday
3/1
0.17
Monday
3/2
0.20
2.00
Tuesday
3/3
0.19
22.00
30.00
7.50
1.40
34.86
47.54
Wednesday
3/4
0.17
1.30
Thursday
3/5
0.14
1.00
Friday
3/6
0.15
1.00
Saturday
3/7
0.13
Sunday
3/8
0.17
Monday
3/9
0.23
1.40
Tuesday
3/10
0.20
29.00
23.00
7.00
2.10
48.37
38.36
Wednesday
3/11
0.34
1.10
Thursday
3/12
0.30
1.00
Friday
3/13
0.20
1.20
Saturday
3/14
0.14
Sunday
3/15
0.15
Monday
3/16
0.20
0.00
Tuesday
3/17
0.18
18.00
16.00
7.20
1.30
27.02
24.02
Wednesday
3/18
0.17
1.10
Thursday
3/19
0.21
1.40
Friday
3/20
0.22
1.40
Saturday
3/21
0.13
Sunday
3/22
0.14
Monday
3/23
0.21
1.00
Tuesday
3/24
0.19
10.00
6.80
1.30
15.85
Wednesday
3/25
0.18
1.70
Thursday
3/26
0.20
1.30
Friday
3/27
0.17
2.10
Saturday
3/28
0.15
Sunday
3/29
0.13
Monday
3/30
0.19
2.20
Tuesday
3/31
0.14
1.40
Total
31
5.69
79.00
69.00
-
-
126.10
109.92
Average
-
0.183
19.75
23.12
N/A
N/A
31.53
36.64
Maximum
-
0.34
29.00
30.00
7.50
2.20
48.37
47.54
Minimum
-
0.13
10.00
16.00
6.80
0.00
15.85
24.02
44
-------
Reporting of Concentration
The example Daily Operations Log shows that four individual BOD5 grab samples were obtained during the
month as follows:
March 3 - 22.00 mg/L
March 10-29.00 mg/L
March 17 - 18.00 mg/L
March 24 - 10.00 mg/L
The daily average concentration is calculated by adding the four values obtained and dividing by the
number of samples taken during the month. The calculated BOD5 daily average is 19.75 mg/L.
(22.00 + 29.00 + 18.00 + 10.001 = 19.75 mg/L Daily Average BOD5
4
The highest BOD5 concentration was obtained on March 10. This value is reported as the maximum BOD5
individual grab for the reporting period.
Reporting of Loadings
Some parameters in the permit are limited in terms of pounds per day (lbs/day). Although all of these
parameters are measured initially in milligrams per liter (mg/L), conversion to lbs/day can be achieved by
using the following formula. Always be sure to use the flow measurement determined on the day when
sampling was done.
Flow on day of sampling (MGD) x concentration (mg/L) x 8.34 (lbs/gal) = Loading (lbs/day)
Using the four BOD5 concentrations and the flow measurements obtained on the days of sampling, the
individual daily loadings are calculated as follows:
March 3 - (. 19 MGD) (22.00 mg/L) (8.34 lbs/gal) = 34.86 lbs/day
March 10 - (.20 MGD) (29.00 mg/L) (8.34 lbs/gal) = 48.37 lbs/day
March 17 - (.18 MGD) (18.00 mg/L) (8.34 lbs/gal) = 27.02 lbs/day
March 24 - (.19 MGD) (10.00 mg/L) (8.34 lbs/gal) = 15.85 lbs/day
The daily average loading (lbs/day) is calculated by adding the individual daily loading values together and
dividing by the number of samples taken during the month. The calculated BOD5 daily average loading is
31.53 lbs/day.
(34.86 + 48.37 + 27.02 + 15.85) = 31.53 lbs/day Daily Average BOD5
4
Flow-weighted Averages
When four samples are not available in a calendar month, the daily average concentration should be
calculated using the four most recent measurements or the arithmetic average (weighted by flow) of all
values taken during the month.
The example Daily Operations Log shows that TSS grab samples were taken only three times during the
month. The values obtained and the flows on the days of sampling are as follows:
45
-------
TSS (mg/L) Flow on day of sampling (MOD)
March 3
30.00
.19
March 10
23.00
.20
March 17
16.00
.18
Total flow on sample days .57
To calculate the flow-weighted concentration for each sample, the following equation must be used. The
flow-weighted average concentration is then determined by adding the flow-weighted concentrations for the
individual samples together.
Concentration (mg/L) x Flow on day of sampling (IV1GD) = Flow-weighted Concentration
Total flow on days
of sampling (MGD)
Sum of Flow-weighted Concentrations = Flow-weighted Daily Average Concentration
March 3 30.00 mg/L x .19/ 57 = 10.00
March 10 23.00 mg/L x .20/.57 = 8.07
March 17 16.00 mg/L x .18/.57 = 5.05
Flow-weighted Daily Average = 23.12 mg/L
TSS Concentration
To calculate the daily average flow-weighted loading, the following equation must be used:
Daily average x Average of flows x 8.34 lbs/gal = Flow-weighted Daily Average Loading (lbs/day)
flow-weighted on sampling days
concentration
23.12 mg/L x .19 + .20 + .18 x 8.34 = 36.64 lbs/day Flow-weighted Daily Average TSS Loading
3
pH
A review of the example Daily Operations Log indicates four pH values were obtained during the reporting
period ranging from a minimum value of 6.80 s.u. on March 24 to a maximum value of 7.50 s.u. on March
3. The highest pH value obtained on March 3 is reported as the maximum pH for the reporting period. The
lowest pH value obtained on March 24 is reported as the minimum pH for the reporting period.
Note that pH is not subject to averaging.
Cl2 Residual
A review of the example Daily Operations Log shows Cl2 residual values ranging from a minimum value of
0.00 mg/L on March 16 to a maximum value of 2.20 mg/L on March 30 were obtained during the reporting
period. The highest Cl2 value obtained on March 30 is reported as the maximum Cl2 residual for the
reporting period. The lowest Cl2 value obtained on March 16 is reported as the minimum CL2 residual for
the reporting period.
46
-------
Note that chlorine residual is not subject to averaging.
Flow
Daily Average Flow and Daily Maximum Flow
The average daily flow is calculated by adding the individual daily flow measurements together and
dividing by the number of days on which flow measurements were taken during the month. The average
daily flow calculated from the example Daily Operations Log is 0.183 MGD. The daily maximum flow is
the highest daily flow value obtained during the reporting period. On the example Daily Operations Log,
the daily maximum flow value is 0.34 MGD , which occurred on March 11.
Annual Average Flow
The annual average flow is the arithmetic average of all daily flow determinations taken during the previous
12-month period. It is calculated by adding the individual daily flow measurements together and dividing
by the number of measurements taken during the previous 365 days. For example, if the total flow recorded
during a 12-month period is 600 MG and during that period of time flow measurements were obtained once
per day, the annual average would be calculated as follows:
600 MG/365 Days = 1.64 MGD Annual Average Flow
For new facilities, the first annual average should be calculated based on the number of measurements taken
during the first full month of operation. The second annual average should be calculated based on the
number of measurements taken during the first and second months of operation. The third annual average
should be calculate based on the number of measurements taken during the first, second and third months of
operation, etc. After twelve months of operation, all annual average flows should be calculated using the
sum of the individual flow measurements divided by the number of measurements taken during the previous
365 days.
For example, during the first full month of operation, if the total flow recorded is 45 MG and 30 flow
measurements were taken (one each day), the annual average flow would be calculated by dividing the total
flow by the number of measurements taken during the month: 45 MG/30 Measurements = 1.5 MGD
Annual Average Flow. During the next 30 days, if the total flow recorded is 75 MG and 31 measurements
were taken (one each day), the annual average flow would be calculated by dividing the total flow for the
first 61 days by the number of measurements taken during that period: 45 MG + 75 MG/61
Measurements = 1.967 MGD Annual Average Flow. During the third month of operation, if the total
flow recorded is 65 MG and 31 measurements were taken (one each day), the annual average would be
calculated by dividing the total flows for the first 92 days by the number of measurements taken during that
period: 45 MG + 75 MG + 65 MG / 92 Measurements = 2.01 MGD Annual Average Flow.
2-hour Peak Flow
The 2-hour peak flow is the maximum flow sustained for a two-hour period during the period of daily
discharge. The maximum 2-hour peak flow which is reported on the Discharge Monitoring Report should
be the highest 2-hour peak flow for any 24-hour period in a calendar month. Questions about how to
determine the 2-hour peak flow should be directed to the Wastewater Permitting Section (MC 148) in the
Water Permits and Resource Management Division.
47
-------
3. Calculating Fecal Coliform Geometric Mean
Fecal coliform bacteria concentration is the number of colonies of fecal coliform bacteria per 100 milliliters
effluent. Fecal coliform bacteria daily average is the geometric mean of the fecal coliform samples
collected in a calendar month. The following instructions show two ways to calculate the geometric mean.
«th Root
The geometric mean can be calculated as the nth root of the product of n data points. In this case, n is the
number of fecal coliform bacteria sample results.
Geometric Mean = wlX1X2X3X4X5...X«
For example, if five fecal coliform bacteria samples are taken and the samples results are 99, 126, 90, 420,
and 2200 colonies/mL, the calculated geometric mean is 253.
(99)(126)(90)(420)(22)) = 1.037 x 1012
V1.037 xl012 = 253
Antilog
The geometric mean can also be calculated by taking the antilog of the arithmetic average of the logarithms
of the sample results. The following instructions describe how this can be done using the data provided in
the chart as an example.
1. Calculate the logarithm for each sample result. For example: The second sample result in the
chart is 120. Enter 120 into the calculator and press the log function. The result is 2.079. This is
the log of 120. *
2. Calculate the arithmetic average of the logarithms. To do this, add all of the logarithm values
together and divide the sum by the number of logarithm values. In the example in the chart, the
sum of the logs is 13.703. Since there are 7 log values, divide 13.703 by seven to determine the
average of the logs. The result is 1.9576. **
3. Take the antilog of the arithmetic average of the logarithms. This will be the geometric mean.
Using the example in the chart, enter 1.9576 into the calculator and press the antilog function. The
result is 91. This is the geometric mean for the sample results. ***
Colonies per 100 mL
(sample results)
Log of Colonies per 100 mL
10
1
120
2.079*
601
2.779
48
1.681
48
-------
130
2.114
11
1.041
1020
3.009
Arithmetic Average
13.703 -7 = 1.9576 **
Geometric Mean
Antilog of 1.9576 = 91 ***
4. Using the MAL Provision to Determine Reportable Results
For some parameters (toxic organic and inorganic constituents), the permit will contain a provision in the
Other Requirements section stating that compliance/noncompliance determinations will be based on the
minimum analytical level (MAL) for the parameter, and effluent concentrations measured as less than the
MAL are deemed to be compliant with the permit limits. This permit provision further states that when an
analysis of an effluent sample for the parameter results in a measurement of less than the MAL that
parameter shall be reported as "<(MAL value)" and this shall be interpreted as a value of zero (0) for
compliance purposes. This means, in these instances, to record the concentration for the sample as < (MAL
value) for the purposes of determining daily maximum concentration and use a zero for that measurement
when calculating the daily average concentration and the daily average loading. The following examples
show how to determine reportable values based on the MAL permit provision, using Mercury as an
illustration.
MAL for Mercury = 0.0002 mg/L (0.2 jxg/1)
Example 1: Some measured values above the MAL and some below the MAL
Sample
Lab Result for
Mercury (mg/L)
Concentration (mg/L) to
be used for calculating
average & loading
Flow on day of
sample collection
(MGD)
Loading (lbs/day)
Sample 1
0.00014 (<0.0002)
0.0
1.022
0.0
Sample 2
0.00028
0.00028
1.039
0.00242
Sample 3
0.00034
0.00034
1.186
0.00336
Sample 4
0.00012 (<0.0002)
0.0
0.974
0.0
Average
—
0.00015
—
0.00144
Values to be Reported on the DMR
Daily Maximum Concentration: 0.00034 mg/L
Daily Average Concentration: 0.00015 mg/L
Daily Average Loading: 0.00144 lbs/day
Example 2: All measured values below the MAL
49
-------
Sample
Lab Result for
Mercury (mg/L)
Concentration (mg/L) to
be used for calculating
average & loading
Flow on day of
sample collection
(MGD)
Loading (lbs/day)
Sample 1
0.00014 (<0.0002)
0.0
1.183
0.0
Sample 2
0.00011 (<0.0002)
0.0
0.966
0.0
Sample 3
0.00018 (<0.0002)
0.0
1.205
0.0
Sample 4
0.00015 (<0.0002)
0.0
1.078
0.0
Average
—
0.0
—
0.0
Values to be Reported on the DMR
Daily Maximum Concentration: <0.0002 mg/L
Daily Average Concentration: 0 mg/L
Daily Average Loading: 0 lbs/day
Note: When an analysis of an effluent sample for a parameter covered by the MAL permit provision indicates no
detectable levels and the test method detection level is not as sensitive as the specified MAL, then the level of
detection achieved must be used for that sample result in determining reportable maximum and average values. A
zero (0) may not be used.
5. No Detection for Non-MAL Parameters
When an analysis of an effluent sample indicates no detectable levels for a parameter not covered by the
MAL permit provision, the level of detection achieved must be used for that sample result in determining
reportable maximum and average values. A zero (0) may not be used.
6. Calculating Sewage Sludge Dry Metric Tons
On the SLDP DMR for sewage sludge production and use, the permittee must report the amount of sewage
sludge produced and the amount of sewage sludge disposed or beneficially reused in dry metric tons. The
following calculations show how to convert gallons or cubic yards of sewage sludge into dry metric tons.
Converting Gallons to Dry Metric Tons
To convert gallons of sewage sludge to dry metric tons, the following equation can be used.
X gal 8.34 lbs 1 KG 1MT % Dry MT
X X X X = Diy Metric
1 1 gal 2.2046 lbs 1000 KG 1 MT Tons
Short Conversion (X)(8.34)(%)
(2.2046)(1000)
Where:
X = Gallons of sewage sludge
50
-------
% = Percent of solids in the sewage sludge
The other values in the equation are conversion factors.
For example, if the permittee disposes of 22,500 gallons of sewage sludge that has a solids content of 5%,
the amount disposed is 4.26 dry metric tons.
(22500¥8.34¥0.05') = 4.26 dry metric tons
(2.2046)(1000)
Converting Cubic Yards to Dry Metric Tons
To convert cubic yards of sewage sludge to dry metric tons, the following equation can be used.
Xyd3 27 ft3 Y lbs 1 KG 1MT % Dry MT
X X X X X = Dry Metric
1 1 yd3 1 ft3 2.2046 lbs 1000 KG 1 MT Tons
Short Conversion: (X)(27)(Y)(%)
(2.2046)(1000)
Where:
X = Cubic yards of sewage sludge
Y = Unit weight of sewage sludge in pounds per cubic foot
% = Percent of solids in the sewage sludge
The other values in the equation are conversion factors.
For example, if the permittee disposes of 100 cubic yards of sewage sludge with a solids content of 25%
and a unit weight of 75 pounds per cubic foot, the amount disposed is 22.96 dry metric tons.
(100¥27¥75¥0.25) = 22.96 dry metric tons
(2.2046)(1000)
51
-------
This document was produced/revised by the following staff members of the Compliance
Assurance and Enforcement Division, NPDES Compliance Monitoring Section, of the
Environmental Protection Agency, Region 6:
Diana McDonald
Bern Gordon
Vivian Hare
Compliance Assurance and Enforcement Division (6EN-W)
Environmental Protection Agency
Region 6
1445 Ross Avenue, Suite 1200
Dallas, TX 75202-2733
August 25, 2004
52
------- |