Wastewater Treatment Plant Discharge Permit (18-DP-2527).pdf

VIA ELECTRONIC MAIL

Mr. Mark Lewis Directorate of Public Works 201 Beasley Drive, Suite 252 Fort Detrick, Maryland 21702-5016

RE: Discharge Permit for Fort Detrick Wastewater treatment Plant State Discharge Permit 18-DP-2527, NPDES Permit MD0020877

Dear Mr. Lewis:

Enclosed is the above discharge permit with the effective date indicated on the cover page. The permittee is responsible for complying with all permit conditions. You are therefore advised to read the permit carefully and become thoroughly familiar with the requirements in order to maintain compliance with the permit.

The annual maximum loading rate limits for Total Nitrogen, Total Phosphorus and Total Suspended Solids (TSS) are included in the permit. Attached please find a copy of blank and sample forms for your use to calculate monthly load, year-to-date cumulative load and annual maximum load for these parameters. At the end of each calendar year, the permittee will be required to fill out and submit this form along with the Discharge Monitoring Report (DMR) for the month of December. You may contact the Project Manager to obtain this form in an electronic version (EXCEL SPREADSHEET).

Your facility has been approved by MDE to electronically submit Discharge Monitoring Report (DMR) through NetDMR. Therefore you are required to submit monthly DMRs by the 28th of the following month and all other documents as listed in the discharge permit electronically through NetDMR. Should you encounter problems in electronic submission for any month, please consult the MDE’s Compliance Program by calling at (410) 537-3510 to avoid missing the deadline for submission of the above stated documents.

You will also find enclosed a copy of the Federal Register published on May 19, 2021 with final rule to update the Code of Federal Regulations (CFR), Title 40, Part 136 - "Guidelines Establishing Test Procedures for the Analysis of Pollutants" which is in effect from July 19, 2021.

For future reference, please be advised to visit the U.S Government Publishing Office (USGPO) website https://mdewwp.page.link/40CFR136 (this link is case-sensitive) regularly to obtain updated guidelines. Unless otherwise specified, the most updated guidelines in 40 CFR Part 136 are required to be used for the analyses of pollutants specified in this permit.

Sep 15, 2021

Mr. Mark Lewis

In addition, we have enclosed a copy of the table of the Minimum Monitoring Requirements.

Also, enclosed is a copy of transmittal cover sheet for the WWTP Effluent Toxic Chemical Monitoring Data, copy of the most updated Department's "Toxic Pollutant Monitoring Protocol and Reporting Requirements for Toxic Chemical Testing Analytical Data (amended on 12/02/2019)", and a copy of the most updated Department’s “Effluent Biotoxicity Testing Protocol for Industrial and Municipal Effluents (amended on 1/23/2019). Please visit Maryland Department of the Environment (MDE) website link below for future updates of these guidance documents:

https://mde.maryland.gov/programs/Permits/WaterManagementPermits/Pages/waterpermit s.aspx (this link is case-sensitive).

If you have any questions, please contact Mahendra Chawla, Project Manager, Surface Discharge Permits Division, at (410) 537-3679 or Email at Mahendra.Chawla@maryland.gov.

Sincerely, D. Lee Currey, Director Water and Science Administration

Enclosures cc: Ms. Rebecca K. Crane, USEPA (electronic copy)

Mr. Barry Glotfelty, Director, Environmental Health, Frederick County Health Department (electronic copy at bglotfelty@frederickcountymd.gov) Mr. Scott Boylan, Western Inspection Division Chief (electronic copy) Mr. Matt Rowe (electronic copy) Mr. Dennis Rasmussen (electronic copy)

Heather Barthel for (Sep 15, 2021 15:34 EDT)

D I S C H A R G E P E R M I T

Pursuant to the provisions of Title 9 of the Environment Article, Annotated Code of Maryland, and regulations promulgated thereunder, and the provisions of the Clean Water Act, 33 U.S.C. Section 1251 et seq., and implementing regulations 40 CFR Parts 122, 123, 124 and 125, the Department of the Environment hereby establishes conditions and requirements pertinent to the wastewater treatment plant and collection system and authorizes:

Department of the Army U S Army Garrison, Fort Detrick 201 Beasley Drive, Suite 204A Frederick, Maryland 21702

TO DISCHARGE FROM: Fort Detrick Wastewater Treatment Plant

LOCATED AT: 1780 North Market Street Frederick, Frederick County, Maryland 21701

THROUGH OUTFALL: 001A (WWTP Effluent)

TO: the Monocacy River, designated as Use IV-P waters, protected for recreational trout and public water supply; in accordance with the following special and general conditions and a map incorporated herein and made a part hereof.

N P D E S D i s c h a r g e P e r m i t

N u m b e r :

M D 0 0 2 0 8 7 7

S t a t e D i s c h a r g e P e r m i t N u m b e r :

1 8 - D P - 2 5 2 7

E f f e c t i v e D a t e : 1 1 / 0 1 / 2 0 2 1

E x p i r a t i o n D a t e : 1 0 / 3 1 / 2 0 2 6

M o d i f i c a t i o n D a t e : ( N o t a p p l i c a b l e )

R e a p p l i c a t i o n D u e D a t e : 0 4 / 3 0 / 2 0 2 5

Permit No. 18-DP-2527 (NPDES MD0020877) Page No. 2 of 38

I . D E F I N I T I O N S

A. “Ambient temperature” of the effluent receiving stream means the water temperature that is not impacted by a point source discharge, and it shall be measured in areas of the stream representative of typical or average conditions of the stream segment in question.

B. “Bypass” means the intentional diversion of pollutants from any portion of a treatment or collection facility.

C. “BOD5 (Biochemical Oxygen Demand)” means the amount of oxygen consumed in a standard BOD5 test without the use of a nitrification inhibitor at 20 degree centigrade on an unfiltered sample.

D. “Clean Water Act” means the Federal Water Pollution Control Act, as amended, 33 U.S.C. Section 1251 et seq.

E. “CFR” means the Code of Federal Regulations.

F. “COMAR” means the Code of Maryland Regulations.

G. “Department” means the Maryland Department of the Environment (MDE).

H. Discharge Limits

1. “Daily maximum (or minimum)" limitation means the highest (or lowest) allowable the daily averages in a calendar month. The daily discharge expressed as concentration (in mg/l) shall be calculated by dividing total of measurement readings by number of sample collected during a calendar day or any 24-hour period that reasonably represents the calendar day for purposes of sampling. The daily discharge expressed as loading rate (in pounds/day) is calculated by using this formula {daily average concentration (mg/l) x the same day total flow (in million gallons) x 8.34}.

2. “Weekly average (maximum or minimum)" limitation means the highest or lowest allowable average of "daily discharges'' over a calendar week, calculated as the sum of all "daily discharges'' measured during a calendar week divided by the number of "daily discharges'' measured during that week. Each of the following 7-day periods is defined as a calendar week: Week 1 is Days 1 - 7 of the month;

Week 2 is Days 8 - 14; Week 3 is Days 15 - 21; and Week 4 is Days 22 - 28. For weekly average maximum, if the "daily discharge" on days 29, 30 or 31 exceeds the "weekly average" discharge limitation, MDE may elect to evaluate the last 7 days of the month as Week 4 instead of Days 22 - 28. For weekly average minimum, if the "daily discharge" on days 29, 30 or 31 is lower than the "weekly average" discharge limitation, MDE may elect to evaluate the last 7 days of the month as Week 4 instead of Days 22 - 28.

Permit No. 18-DP-2527 (NPDES MD0020877) Page No. 3 of 38

3. “Monthly average maximum (or minimum)” limitation means the highest (or lowest) allowable monthly average concentration or waste load of a parameter over a calendar month. The monthly average is calculated as the sum of all daily discharges for a parameter sampled and/or measured in that calendar month divided by the number of days on which monitoring was performed.

4. “Minimum or maximum” limit means the lowest or highest allowable value measured during a calendar day or any 24-hour period that reasonably represents the calendar day for purposes of sampling.

5. “Monthly loading rate (in pounds/month)” means the total load of a parameter calculated for that calendar month. It is calculated using this formula {(monthly average concentration in mg/l) x (Total monthly flow in Million Gallons) x 8.34}.

6. “Year-to-date cumulative load (pounds)” value means cumulative load of a pollutant in the effluent through each reporting month in a calendar year. It is calculated as a sum of the individual total monthly loads from January through the reporting month in a calendar year.

7. “Annual Maximum Loading Rate (in pounds/year)” limit means the maximum load allowed for a pollutant in the effluent to be discharged in a calendar year.

The Year-to-date cumulative load (as defined above in Definition I.H.6) shall be used to determine the compliance status of this requirement.

8. “Monthly log mean (Monthly geometric mean)” limit means the highest allowable value calculated as the logarithmic or geometric mean of all samples taken in the calendar month. The geometric mean is the antilogarithm of the mean of the logarithms.

I. Discharge Monitoring

1. “Composite sample” means a combination of individual samples obtained at hourly or smaller intervals over a time period. Either the volume of each individual sample is proportional to discharge flow rates or the sampling interval (for constant volume samples) is proportional to the flow rates over the time period used to produce the composite.

2. “Grab sample” means an individual sample collected over a period of time not exceeding 15 minutes.

3. “Estimated flow” value means a calculated volume or discharge rate which is based on a technical evaluation of the sources contributing to the discharge including, but not limited to, pump capabilities, water meters, and batch discharge volumes.

Permit No. 18-DP-2527 (NPDES MD0020877) Page No. 4 of 38

4. “Measured flow” value means any method of liquid volume measurement, the accuracy of which has been previously demonstrated in engineering practice, or for which a relationship to absolute volume has been obtained.

5. “Recorded flow” means any method of providing a permanent, continuous record of flow including, but not limited to, circular and strip charts.

6. “Monthly average flow” means the total flow for a calendar month divided by the number of days in the same month.

J. "i-s (immersion stabilization)" means a calibrated device immersed in the effluent or stream, as applicable, until the temperature reading is stabilized.

K. “NetDMR” means a nationally-available electronic reporting tool, initially designed by states and later adapted for national use by EPA, which can be used by NPDES-regulated facilities to submit discharge monitoring reports (DMRs) electronically to EPA through a secure Internet application over the National Environmental Information Exchange Network (NEIEN). EPA can then share this information with authorized states, tribes, and territories.

L. “NPDES (National Pollutant Discharge Elimination System)” means the national system for issuing permits as designated by the Clean Water Act.

M. “Nondetectable Level” for total residual chlorine means a residual concentration of less than 0.10 mg/l as determined using either the DPD titrimetric or chlorimetric method or an alternative method approved by the Department.

N. “Outfall” means the location where the effluent is discharged into the receiving waters.

O. “Overflow” means any loss of wastewater or discharge from a sanitary sewer system, combined sewer system or wastewater treatment plant bypass (as defined in I.B) which results in the direct or potential discharge of raw, partially treated wastewater into the waters of the State.

P. “Permittee” means an individual or organization holding the discharge permit issued by the Department.

Q. “POTW” means a publicly owned treatment works.

R. “Sampling Point” means the effluent sampling location in the outfall line(s) downstream from the last addition point or as otherwise specified.

S. “Sanitary Sewer Overflow (SSO)” means a discharge of untreated or partially treated sewage from a separate sewer system before the sanitary wastewater reaches the headworks of a wastewater treatment facility, pursuant to COMAR 26.08.10.01.

Permit No. 18-DP-2527 (NPDES MD0020877) Page No. 5 of 38

T. “Significant Industrial User (SIU)” is defined as any industrial user (IU) that:

1. is subject to national categorical standards; and

2. any other IU that:

a. discharges an average of 25,000 gallons per day or more of process wastewater (excluding sanitary, non-contact cooling and boiler blowdown wastewater); or

b. contributes a process wastestream that makes up 5% or more of the average dry weather hydraulic or organic capacity of the POTW; or

c. is designated as such by the POTW on the basis that the IU has a reasonable potential for adversely affecting the POTW's operation or for violating any pretreatment standard or requirement; or

d. is found by the POTW, the Department, or the Environmental Protection Agency (EPA) to have significant impact either individually or in combination with other contributing industries to the POTW, on the quality of the sludge, the POTW's effluent quality, or air emissions generated by the system.

U. “TKN (Total Kjeldahl Nitrogen)” means organic nitrogen plus ammonia nitrogen.

V. “TSS (Total Suspended Solids)” means the residue retained on the filter by an analysis done in accordance with Standard Methods or other approved methods.

W. “Upset” means the exceptional incident in which there is unintentional and temporary noncompliance with technology-based permit effluent limitations because of factors beyond the reasonable control of the permittee. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventive maintenance, or careless or improper operation.

Permit No. 18-DP-2527 (NPDES MD0020877) Page No. 6 of 38

I I . S P E C I A L C O N D I T I O N S

A. Effluent Limitations, Outfall 001A (1) (2) (3) (4)

The quality of the effluent discharged by the facility at a discharge point location (Outfall 001A) shall be limited at all times as shown below:

Effluent Characteristics

Maximum Effluent Limits Monthly Average Loading

Rate, Weekly Average

Loading Rate, Daily Average

Loading Rate, Monthly Average

Concentration, Weekly Average

Concentration, Daily Average

Concentration, Pounds/day Pounds/day Pounds/day mg/l mg/l mg/l

BOD5 170

N/A

TSS 170 250 N/A 10 15 N/A

TKN (4/1 to 9/30)

3.0

4.5

Effluent Characteristics

Maximum Effluent Limits Total Monthly Loading Rate, Annual Maximum Loading Rate, Monthly Average Concentration, Pounds/Month Pounds/Year mg/l

TSS (4) REPORT 60,800 REPORT

Total Phosphorus-P (4) (5) (6)(7) REPORT 1,827 REPORT

Total Nitrogen-N (5) (6) (7) REPORT 24,364 REPORT

Effluent Characteristics

Effluent Limits

Maximum Minimum E. coli (4) 126 MPN/ 100 ml monthly geometric mean value N/A

Total Residual Chlorine (8) Non-detectable level (See footnote- 8) N/A pH 8.5 6.5

Dissolved Oxygen (All Year)

5.0 mg/l at anytime

An annual average flow of 2.0 million gallons per day (mgd) was used in waste allocation calculations (expressed as waste loading rate limit), and this unit shall be used when reporting on the Discharge Monitoring Report (DMR) as required by General Condition III.A.2. Notification is to be provided to the Department at least 180 days before the annual average flow is expected to exceed this flow level. If a permit modification is required, the Department will initiate the public participation NPDES process.

Permit No. 18-DP-2527 (NPDES MD0020877) Page No. 7 of 38

A. Footnotes for Effluent Limitations:

(1) When this permit is renewed, the new limitations may not be equal to the above limitations.

(2) There shall be no discharge of floating solids or visible foam other than trace amounts.

(3) The permit may also be reopened in accordance with the requirements of MDE's Watershed Permitting Plan under which all discharge permits in a watershed are issued the same year.

(4) Lower Monocacy River is on the 303(d) list as the impaired waters for nutrients (1996), sediments (1996), and fecal bacteria (2002). A Total Maximum Daily Load (TMDL), approved by the EPA on 05/22/2013, allocated a total phosphorus load of 1, 827 lbs/yr, a TMDL for E.coli approved on 12/03/2009 allocated a limit of 126 MPN/100 ml and a TMDL for sediment approved on 03/17/2009 allocated a load limit of 30.4 tons/yr to this facility; and the parameter limits are in conformance with this TMDL. This permit is in conformance with the “Chesapeake Bay TMDL for Nitrogen, Phosphorus and Sediment” established on December 29, 2010.

When TMDLs for other remaining parameters are completed, limits may be imposed, after the public participation process, to incorporate any TMDL requirements.

(5) The permittee shall operate the ENR facility in a manner that optimizes the nutrient removal capability of the facility. The first exceedance of the permit limit shall be counted and reported as daily exceedances beginning from the first exceedance, determined to the nearest day, through December 31. In addition, after any such exceedance, the permittee shall demonstrate to the Department's satisfaction that the facility is optimizing its nutrient removal capability, and neither the arrival of the next calendar year nor the issuance of a permit renewal during a period of noncompliance shall obviate continuance of any noncompliance status related to treatment optimization requirements.

(6) At the end of each calendar year, the permittee shall comply with the concentration-based limitations for the Annual Maximum Loading Rate defined below or the Chesapeake Bay TMDL based annual maximum loading rate limitations listed in above in the effluent limitations table, whichever is lower:

(a) TN Limitation (lbs/year): 4.0 mg/l x annual total flow (calendar year based in million gallons per year) x 8.34. To the extent that the permittee alleges that temperature levels of 12 degrees C or lower have diminished the treatment system’s capability of complying with this concentration-based loading rate limitation for Total Nitrogen, the permittee shall provide notification beginning with the calendar year report under the “Upset” provision in Section III.B.6 of this permit. In any enforcement proceeding, the permittee seeking to establish the occurrence of an upset has the burden of proof.

(b) TP Limitation (lbs/year): 0.30 mg/l x annual total flow (calendar year based in million gallons per year) x 8.34.

The details and results of all required annual calculations shall be submitted to the Department with the Discharge Monitoring Report for December. See Special Condition II.J for further details.

The concentration-based loading requirements may be revised if the limits or schedule are determined to be impracticable based on actual performance and the Department re-opens the permit as a major modification (which requires public participation) to impose (an) alternate effluent limitation(s) or revised schedule.

(7) The permittee may request that the permit be reopened and modified to include nutrient trading consistent with all applicable regulations and requirements in effect at that time.

(8) Total residual chlorine limitation of the nondetectable level shall be applicable, when chlorine or any chlorine-containing compound is used in any treatment process(es), including but not limited to disinfection, that could become a potential constituent of the effluent discharged from the Fort Detrick WWTP. The wastewater shall be dechlorinated to reduce effluent total residual chlorine concentration to the nondetectable level (See definition I.M).

Page No. 8 of 39 Permit No. 18‐DP‐2527 (NPDES MD0020877)

B(1). Minimum Monitoring Requirements:

The effluent characteristics listed below in Table B(1) shall be monitored at the sampling point (Definition I.R).

If the sampling point is other than the outfall- 001A, the permittee shall ensure that the effluent samples are representative of the effluent quality being discharged at the outfall- 001A.

Effluent Characteristics Monitoring Period Measurement Frequency Sample Type

BOD5

(9)(18) All Year Two per week 24-hour composite

Total Suspended Solids (9)(18) All Year Two per week 24-hour composite

TKN (9)(11)(18) All Year Two per week 24-hour composite

Total Ammonia Nitrogen as N (9)(10)(11)(15)(16)(18) All Year Two per week 24-hour composite

Organic Nitrogen as N (9)(10)(11)(16)(18) All Year Two per week Calculated

(Nitrite + Nitrate) as N (9)(10)(11)(16)(18) All Year Two per week 24-hour composite

Total Nitrogen as N (9)(11)(12(17)(18) All Year Two per week Calculated

Orthophosphate as P (9)(10)(15)(18) All Year Two per week 24-hour composite

Total Phosphorus(9)(12)(17)(18) All Year Two per week 24-hour composite

E. coli (4)(9)(18) All Year Two per week Grab

Total Residual Chlorine (9)(13)(14) All Year Three per day One per shift

Grab

Dissolved Oxygen (9)(14) All Year Three per day One per shift

Grab pH (9)(14)

Benzidine (9)*N-Nitrosodimethylamine (9)*

Hexachlorobenzene (9)*

Temperature(9)(10)(19)**

(Effluent+Stream)

Flow(9)((15)(16)

Total Flow(9)(17)

All Year

All Year

All Year

All Year

All Year

All Year

All Year

Three per day One per shift

One per quarter One per quarter

One per quarter

One per week**

Continuous

Monthly

Grab

24-hour composite

24-hour composite

24- hour composite

(i – s)

Recorded

Calculated

Permit No. 18-DP-2527 (NPDES MD0020877) Page No. 9 of 38

Footnotes for the monitoring requirements:

* These toxic substances shall be monitored without limits on a quarterly basis starting from the effective date of the permit. The monitoring of these chemicals shall be performed in accordance with the MDE’s latest edition of “Toxic Pollutant Monitoring Protocol and Reporting Requirements for Toxic Chemical Testing Analytical Data”. The testing laboratory shall measure and report the results in units of µg/L using detection limits specified in the above protocol. The results shall be reported at the end of each quarter ending in March, June, September and December.

After the completion of the first four quarterly samplins, if the results indicate that the effluent levels of these chemicals have no reasonable potential to exceed aquatic life or human health toxic criteria, the permittee may petition the Department to discontinue the regular quarterly monitoring requirements for these chemicals.

** The temperature monitoring frequency of One per week means One set of the temperature measurements required during a calendar week. Each set of the temperature measurements shall include a minimum of two temperature measurements including one in the morning and one in afternoon on the same day. See Special Condition II. L for further details.

(9) "STORET" (short for STOrage and RETrieval) is a widely-used repository for water quality data reporting and monitoring. The STORET codes for the effluent characteristics described as limitations and/or monitoring requirements are: BOD5 (00310), Total Suspended Solids (00530), TKN (00625), Total Ammonia Nitrogen as N (00610), Total Phosphorus as P (00665), Total Nitrogen as N (00600), (Nitrite + Nitrate) as N (00630), Organic Nitrogen as N (00605), Orthophosphate as P (04175), E. Coli (51040), Total Residual Chlorine (50060), Dissolved Oxygen (00300), Benzidine (39120), Benzo(a) Anthracene (34526), Acrylonitrile (34215), Aldrin (39330), N-Nitrosodimethylamine (34438), N-Nitosodi-n-Propylamine (34428), Dieldrin (39380), 3,3'-Dichlorobenzidine (34631), Hexachlorobenzene (39700), Heptachlor Epoxide (39420), Toxaphene (39400), PCB (04166), pH (00400), Flow (50050), Total flow (82220), and Temperature (00011).

(10) This parameter (without effluent limitations) must be monitored, and it shall be reported on the Monthly Operating Report (MOR) as individual results and on the Discharge Monitoring Report as monthly average concentrations.

(11) Total nitrogen as N (in mg/l) is a calculated parameter as the sum of individual results for total ammonia nitrogen as N, organic nitrogen as N and (nitrite + nitrate) as N. Total Kjeldahl Nitrogen (TKN) is defined as the total concentration of organic nitrogen and ammonia as N. All nitrogen species must be sampled at the same day.

The monitoring result for organic nitrogen may be calculated through the subtraction of the total Ammonia as N monitoring result from the result of TKN sample taken at the same day.

(12) The permittee shall also calculate and report on the DMR the TN and TP total monthly loads (Definition I.H.5) plus year-to-date cumulative loads (Definition I.H.6) for the calendar year in question for the outfall- 001A.

For each calendar year, the year-to-date cumulative loads of TN and TP for the month of December shall represent the total annual loads, and they must be incorporated toward complying with the respective annual maximum load limits. Refer to Special Condition II.J for “Reporting TN and TP total annual loads for compliance to the Concentration-based maximum annual loading rate limits”.

(13) The Minimum monitoring requirements of three per day-grab samplings for total residual chlorine shall be applicable, when chlorine or any chlorine compound is used in any treatment process(es), including but not limited to disinfection, that could become a potential constituent of the effluent discharged from the Fort Detrick WWTP. The minimum level (quantification level) for total residual chlorine is 0.10 mg/l. The permittee may report all results below the minimum level as <0.10 mg/l. All results reported below the minimum level shall be considered in compliance.

(14) Samples for these parameters (total residual chlorine, pH and dissolved oxygen) shall be taken at intervals evenly distributed throughout the staffed period each day to comply with the General Condition III.A for the representative sampling requirements.

Permit No. 18-DP-2527 (NPDES MD0020877) Page No. 10 of 38

(15) Flows shall be reported in millions gallons per day (mgd) to at least the nearest 10,000 gallons per day.

(Example: A flow of 1,524,699 gallons per day shall be reported as 1.53 mgd.). For each calendar month, flows shall be reported on the MOR as daily individual results and on the DMR as monthly average (mgd) and daily maximum (mgd).

(16) Continuous electronic flow measurement and recording which can produce a permanent record are acceptable to the Department.

(17) “Total flow” is a calculated parameter equal to sum of the daily flow results in a calendar month. It shall be reported on the monthly DMR as Total monthly flow in millions gallons (MG) to at least the nearest 10,000 gallons. (Example: A flow of 1,524,699 gallons shall be reported as 1.53 MG

(18) The permittee shall distribute the timing for effluent sampling with (a) minimum of 48-hour apart for two per week monitoring frequencies, (b) minimum of 24-hours apart for three per week monitoring frequencies, or (c) no more than one per day for five per week monitoring frequencies. The 48 hours interval for two per week sampling shall be defined as the period between the starting times of the two consecutive effluent sample collections for the same effluent parameter.

(19) Temperatures of the effluent and stream shall be monitored and reported in accordance with the Special Condition II.K.

Refer to Definition I.J for Sample Type "i-s (immersion stabilization)". The temperatures shall be measured using a device which has accuracy of at least 0.1o C and meeting the appropriate standards stated in 40CFR Part 136.

B(2). Report Submittal Requirements

Report Description Reporting Frequency Report Submittal Deadline Effluent Biomonitoring Study Plan and Toxic Chemical Testing Plan (20)(21) See footnote - 21 See footnote – 21

Effluent Biomonitoring Study Report (20)(22) (24) See footnotes- 22 & 24 See footnote- 24

Effluent Toxic Chemical Testing Report (20)(23)(24) See footnotes – 23 & 24 See footnote- 24 Wastewater Capacity Management Plan (WCMP)

(20(25) See footnote – 25 See footnote- 25

Flow Capacity Report (FCR) (20(26) See footnote - 26 See footnote- 26

Gross Beta Activity Report for:

1) WWTP Influent

2) WWTP Effluent

3) Landfill Leachate

Quarterly (see page 22)

Quarterly (see page 22)

(20) If the permittee has selected a third party for submitting reports to the Department, the permittee must provide to the third party with a document of authorization for report submission which is required with the report.

(21) Within three months from the effective date of this permit, the permittee shall submit the Study Plans for effluent biomonitoring as well as toxic chemical testing and obtain approval from the Department. For further details, refer to Special Condition II.D.1 for Effluent Biomonitoring Study Plan and Special Condition II.F.1 for Effluent Toxic Chemical Testing Study Plan.

(22) After MDE’s approval of the Effluent Biomonitoring Study Plan, the permittee shall perform the effluent biomonitoing study and submit the results in a comprehensive report to the Department as per requirements of the Special Condition II.D.

(23) After MDE’s approval of the Effluent Toxic Chemical Testing Plan, the permittee shall perform the effluent toxic chemical testing and submit the results in a comprehensive report to the Department as per requirements of the Special Condition II.F.

Permit No. 18-DP-2527 (NPDES MD0020877) Page No. 11 of 38

(24) The reports (a) for each biomonitoring study test performed as per the Special Condition II.D.2 and (b) for each analytical testing for toxic chemicals performed as per Special Condition II.F.3 shall be submitted to the Department by a mail or attached and submitted to the Department along with DMR for the month during which the test was completed, using NetDMR tool no later than 28th of the month following the test completion month.

(Example: If the test is completed in March, the comprehensive report shall be submitted with the March DMR no later than 28th April).

(25) Unless the permittee has previously submitted the WCMP to the Department; the permittee shall submit the WCMP one time within 90 (Ninety) days of the effective days of this permit.

(26) The permittee shall submit the FCR to the Department as per the Special Condition II.C. This report shall be submitted once per year along with the DMR for the month of December.

C. Wastewater Capacity Management

The permittee shall report the total cumulative flow for the each calendar year for the above referenced facility. The total cumulative flow shall be reported in million gallons for the entire calendar year to the nearest ten thousand gallons. The annual total cumulative flow determination shall be provided to the Department using NetDMR no later than January 28th of the following year.

If the most recent three year average flow is over 80% of its design capacity or if it is anticipated to exceed 80 % in the following year, a Wastewater Capacity Management Plan (WCMP) must be submitted to the Department using NetDMR no later than January 28 of the following year. Thereafter, the “Wastewater Flow Capacity Report (WFCR)” and “worksheets (Style #1 and #2) for WFCR” shall be submitted to the Department using NetDMR tool no later than January 28th of each year. The permittee can obtain the WCMP guidance document and forms from the Department’s web site links listed below:

(a) https://mdewwp.page.link/CMPGuidance for WCMP guidance document,

(b) https://mdewwp.page.link/CMPFlowCap for WFCR,

(c) https://mdewwp.page.link/CMPws1 for WFCR’s Worksheet # 1, and

(d) https://mdewwp.page.link/CMPws2 for WFCR’s Worksheet # 2 (these links are case-sensitive).

If the permittee prefers to provide the above documents in hard copies, they shall be provided to the Department postmarked by January 28th of the following year to the address below:

Attention: Calendar Year Total Cumulative Flow Wastewater Discharge Permits Program

Water and Science Administration (WSA) Maryland Department of the Environment

1800 Washington Boulevard, STE-455 Baltimore, MD 21230-1708

The permittee is advised to notify the Department at the above address immediately upon electronic submission of reports through NetDMR tool.

Permit No. 18-DP-2527 (NPDES MD0020877) Page No. 12 of 38

D. Biomonitoring Program

1. Within three months of the effective date of the permit, the permittee shall submit to the Department for approval a study plan to evaluate wastewater whole effluent toxicity (WET) at Outfall 001A using the biomonitoring results. The study plan shall include a discussion of:

a. wastewater and production variability

b. sampling & sample handling

c. source & age of test organisms

d. source of dilution water

e. testing procedures/experimental design

f. data analysis

g. quality control/quality assurance

h. report preparation

i. testing schedule

2. The testing program shall consist of definitive testing for four annual testing events.

Three of the events shall have acute testing and one of the events shall have chronic testing. The testing events shall be conducted annually during January or February of each of the first four years after approval of the study plan. One of these first two testing events shall include the chronic tests. This testing shall be initiated no later than January or February following the Department’s acceptance of the study plan. If results from any of the required tests suggest toxicity in the effluent, the permittee shall repeat the required test within 60 days as a follow-up test. If toxicity is observed from the results of the follow-up test, the permittee shall be subject to the requirements specified in Section 10 below of this Special Condition.

a. The acute testing shall consist of 48-hour static renewal tests using fathead minnow and the 48-hour static renewal tests using a daphnid.

b. The chronic testing shall include the Ceriodaphnia survival and reproduction test and the fathead minnow larval survival and growth test.

c. Acute test results shall be expressed as LC50. Chronic test results shall be expressed as NOEC, LOEC, ChV, and IC25.

3. The samples used for biomonitoring shall be collected at the same time and location as the samples analyzed for the effluent limitations and monitoring requirements for this outfall. For chlorinated effluents, samples shall be collected after dechlorination.

The permittee shall collect 24-hour flow–proportioned composite samples unless the Department has given prior approval of an alternative sampling type.

Permit No. 18-DP-2527 (NPDES MD0020877) Page No. 13 of 38

D. 4. The following EPA documents discuss the appropriate methods:

a. Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms, Fifth Edition, EPA-821-R-02-012, October 2002

b. Short-term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms Fourth Edition, EPA-821-R-02- 013, October, 2002

5. Test results shall be submitted to the Department within one month of completion of each set of tests.

6. Test results shall be reported in accordance with the Department’s “Effluent Biotoxicity Testing Protocol for Industrial and Municipal Effluents, Appendix E (Reporting Requirements for Effluent Biomonitoring Data), 01/23/2019”.

7. As a minimum, the reported chronic results shall be expressed as NOEC, LOEC, ChV, and IC25.

8. If a 50% mortality or greater occurs in one or more effluent concentrations during the first 48 hours of the chronic tests, 48-hour LC50s shall be calculated and reported along with the chronic results.

9. If testing is not performed in accordance with MDE-approved study plan, additional testing may be required by the Department.

10. If the test results of any two consecutive valid toxicity tests show acute or chronic toxicity (LC50 equal to or less than 100% for acute tests and an IC25 equal to or less than the in-stream waste concentration for chronic tests), the permittee shall repeat the test within 30 days to confirm the findings of acute or chronic toxicity.

Intermittent toxicity or other concerns may require additional testing or limits. If acute and/or chronic toxicity is confirmed, the permittee shall:

a. Eliminate the source of toxicity through operational changes as soon as possible but in any case not longer than within three months, or

b. Perform a TRE. If the permittee repeats the toxicity testing as stated above and the results of the repeat test do not confirm the acute or chronic toxicity, the Department will require the permittee to repeat the toxicity testing as stated above to reconfirm a finding of no acute or chronic toxicity. After reconfirmation, the permittee shall complete any remaining quarterly testing required.

Permit No. 18-DP-2527 (NPDES MD0020877) Page No. 14 of 38

D. 11. If the permittee completes a TRE in accordance with II.D.10.b and unacceptable toxicity is confirmed, a Whole Effluent Toxicity (WET) permit limit and a compliance schedule will be required which shall become discharge permit conditions through a Department initiated permit modification or through a permit renewal.

12. When a WET test result shows reasonable potential for toxicity, unless it can be demonstrated that the source of toxicity has been eliminated, inappropriate test procedures were utilized, or the source has been controlled via a chemical specific permit limitation, WET limits shall be required. These limits may be implemented by reopening the current permit or in a permit renewal. Where reasonable potential has been assumed based on one test result, the permit shall include a WET limit effective within three years unless the effluent shows no toxicity in six follow-up quarterly tests. The permit may be modified to remove the WET limit if the six follow-up quarterly tests show no toxicity.

13. If plant processes or operations change so that there is a significant change in the nature of the wastewater, the Department may require the permittee to conduct a new set of tests.

14. If a significant industrial user locates within the service area so that significant change in the nature of the wastewater might be anticipated, MDE may require the permittee to conduct a new set of tests.

15. The biomonitoring program study plan, WET test results and related materials shall be submitted electronically to the Department if the permittee has already been approved for the NetDMR tool. The material shall be attached as separate single files and labeled as “Biomonitoring Program Study Plan” and “WET Test Results” in the NetDMR tool. Otherwise, the permittee shall submit all pertinent physical documents to:

Attention: Whole Effluent Toxicity Coordinator Compliance Program

Water and Science Administration Maryland Department of the Environment

Montgomery Park Business Center 1800 Washington Boulevard, Suite 420

Baltimore, MD 21230-1708

The permittee shall notify the Department at the above address or via email at mde.biomonitoring@maryland.gov immediately upon electronic submission of the biomonitoring program study plan, WET test results and associated material through NetDMR tool.

Permit No. 18-DP-2527 (NPDES MD0020877) Page No. 15 of 38

E. Toxicity Reduction Evaluation

The permittee shall conduct a Toxicity Reduction Evaluation (TRE) when a review of toxicity test data by the Department indicates unacceptable acute or chronic effluent toxicity.

A TRE is an investigation conducted to identify the causative agents of effluent toxicity, isolate the source(s), determine the effectiveness of control options, implement the necessary control measures and then confirm the reduction in toxicity.

1. Within 90 days of notification by the Department that a TRE is required, the permittee shall submit for approval by the Department a plan of study, schedule and completion date for conducting a TRE. The permittee shall conduct the TRE study consistent with the submitted plan and schedule.

2. This plan shall follow the framework presented in Toxicity Reduction Evaluation Guidance for Municipal Wastewater Treatment Plants (EPA/833B-99/002) August 1999.

Additional Guidance documents on the TRE process are shown below:

- Methods for Aquatic Toxicity Identification Evaluations Phase I Toxicity Characterization Procedures Second Edition United States Environmental Protection Agency Office of Research and Development, Washington, DC 20460, EPA/600/6-9 l/003 February 1991

- Methods for Aquatic Toxicity Identification Evaluations Phase II Toxicity Identification Procedures for Samples Exhibiting Acute and Chronic Toxicity, United States Environmental Protection Agency Office of Research and Development, Washington DC 20460, EPA/600/R-92/080 September 1993

- Methods for Aquatic Toxicity Identification Evaluations Phase Ill Toxicity Confirmation Procedures for Samples Exhibiting Acute and Chronic Toxicity, United States Environmental Protection Agency Office of Research and Development, Washington DC 20460, EPA /600/R-92/08 1 September 1993

- Clarifications Regarding Toxicity Reduction and Identification Evaluations in the National Pollutant Discharge Elimination System Program, March 27, 2001, U.S. Environmental Protection Agency, Office of Wastewater Management , Office of Regulatory Enforcement, Washington, DC 20460

3. Beginning 60 days from the date of the Department's acceptance of the TRE study plan and every 60 days thereafter, the permittee shall submit progress reports including all relevant test data to the Department. This shall continue until completion of the toxicity reduction confirmation.

Permit No. 18-DP-2527 (NPDES MD0020877) Page No. 16 of 38

E. 4. Within 60 days of completion of the toxicity identification or the source identification phase of the TRE, the permittee shall submit to the Department a plan, schedule and completion date for implementing those measures necessary to eliminate acute toxicity, an LC50 greater than 100%, and/or eliminate chronic toxicity, an IC25 greater than the in-stream waste concentration (IWC). The implementation of these measures shall begin immediately upon submission of this plan.

5. Within 60 days of completing the implementation of the control measures to eliminate or reduce toxicity, the permittee shall submit to the Department for approval a study plan to confirm the elimination or reduction of toxicity by using biomonitoring.

6. If, for any reason, the implemented measures do not result in compliance with the Department's toxicity limitations, the permittee shall continue the TRE and a Whole Effluent Toxicity (WET) permit limit and a compliance schedule will be required.

7. All TRE-related materials shall be submitted electronically to the Department if the permittee has already been approved for the NetDMR tool. The material shall be attached as a separate single file and labeled as “TRE” in the NetDMR tool.

Otherwise, the permittee shall submit all pertinent physical documents to:

Attention: Whole Effluent Toxicity Coordinator Compliance Program

Water and Science Administration Maryland Department of the Environment

Montgomery Park Business Center 1800 Washington Boulevard, Suite 420

Baltimore, MD 21230-1708

The permittee shall notify the Department at the above address or via email at mde.biomonitoring@maryland.gov immediately upon electronic submission of TRE material through NetDMR tool.

Permit No. 18-DP-2527 (NPDES MD0020877) Page No. 17 of 38

F. Toxic Chemical Testing

1. Concurrent with the biomonitoring study plan, the permittee shall submit to the Department for approval, a study plan to perform the sets of analytical testing for toxic chemicals.

2. The toxic chemical testing study plan shall include a description of:

a. sampling methods;

b. analytical methods;

c. practical detection levels; and

d. quality control procedures.

3. Concurrently with each biomonitoring toxicity tests (Special Condition II.D.2), the permittee shall perform analytical testing for the toxic chemicals identified in the Department's "Toxic Pollutant Monitoring Protocol and Reporting Requirements for Toxic Chemical Testing Analytical Data, 12/2/2019”.

4. Toxic chemical testing shall be performed in accordance with 40 CFR Part 136 and the Department-approved toxic chemical testing plan. Also, the MDE’s protocol titled "REPORTING REQUIREMENTS FOR TOTAL PCBs (PCB CONGENERS) BY EPA METHOD 1668 C or A, rev 11/9/2017” shall be utilized when analyzing effluent samples for Total Polychlorinated Biphenyls (Total PCBs) using EPA Method 1668 A or C. The total PCBs concentration is the summation of all individually measured congeners. Both the individual congeners and the total PCBs concentrations shall be reported. Grab samples must be used for cyanide, phenols, and volatile organic compounds. All other pollutants shall be collected using 24-hour flow–proportioned composite samples unless the Department has given prior approval of an alternative sampling type.

5. Substances other than those identified in Section 3 above may be detected in the effluent. If so, the permittee shall identify and quantify the ten present in highest concentration for those compounds for which standards are available.

6. Results of each toxic chemical test performed as per Sections II.F.3 and II.F.4 shall be submitted to the Department with results of the concurrent biomonitoring toxicity test.

7. Toxic chemical testing results shall be reported in accordance with the Department's "Toxic Pollutant Monitoring Protocol and Reporting Requirements for Toxic Chemical Testing Analytical Data, 12/2.2019"./

8. If testing is not performed in accordance with the Department's approved study plan, additional testing may be required by the Department.

Permit No. 18-DP-2527 (NPDES MD0020877) Page No. 18 of 38

F. 9. All toxic chemical testing results and related materials shall be submitted electronically to the Department if the permittee has already been approved for the NetDMR tool. The results shall be attached as a separate single file and labeled as “Toxic Chemical Testing Results” in the NetDMR tool. Otherwise, the permittee shall submit all pertinent physical documents to:

Attention: Toxic Chemical Testing Coordinator Compliance Program

Water and Science Administration Maryland Department of the Environment

Montgomery Park Business Center 1800 Washington Boulevard, Suite 420

Baltimore, MD 21230-1708

The permittee shall notify the Department at the above address or via email at mde.biomonitoring@maryland.gov immediately upon electronic submission of results through the NetDMR tool.

G. Use of Sufficiently Sensitive Test Methods

In accordance with 40 C.F.R. § 122.44(i)(1)(iv), the permittee shall use sufficiently sensitive test procedures (i.e., methods) approved under 40 C.F.R. Part 136 or required under 40 C.F.R. Chapter I, Subchapter N or O, for the analysis of pollutants or pollutant parameters limited in this permit. A method is considered “sufficiently sensitive” when either: (1) the method minimum level (ML) is at or below the level of the effluent limit established in this permit for the measured pollutant or pollutant parameter; or (2) the method has the lowest ML of the analytical methods approved under 40 C.F.R. Part 136 or required under 40 C.F.R.

Chapter I, Subchapter N or O for the measured pollutant or pollutant parameter. The ML is not the minimum level of detection, but rather the lowest level at which the test equipment produces a recognizable signal and acceptable calibration point for a pollutant or pollutant parameter, representative of the lowest concentration at which a pollutant or pollutant parameter can be measured with a known level of confidence. For the purposes of this permit, the detection limit is the lowest concentration that can be reliably measured within specified limits of precision and accuracy for a specific laboratory analytical method during routine laboratory operating conditions (i.e., the level above which an actual value is reported for an analyte, and the level below which an analyte is reported as non-detect).

Permit No. 18-DP-2527 (NPDES MD0020877) Page No. 19 of 38

H. NON-DOMESTIC WASTEWATER CONTROL PROGRAM

1. OBJECTIVE

The permittee shall operate and maintain a program for controlling the discharge of non-domestic wastewater to the sewage treatment plant to prevent pass through of pollutants to State waters, prevent interference with the operation of the sewage treatment facility and to facilitate the safe and efficient disposal of sewage sludge.

2. IMPLEMENTATION

a. The permittee shall establish a sewer use regulation applicable to non-domestic discharges to the sewage treatment plant which sets forth their responsibility to comply with requirements established therein. The permittee shall provide notice of the sewer use regulation to all dischargers of non-domestic wastewater. The requirements of this regulation are not requirements of this State Discharge Permit and are not directly enforceable by the Department through this Permit.

b. The permittee shall evaluate the need, and develop where necessary, site-specific discharge limitations applicable to all non-domestic dischargers. The permittee shall consider the methodology described in “Guidance Manual on the

Development and Implementation of Local Discharge Limitations Under the Pretreatment Program” (USEPA, Office of Water Enforcement and Permits, December 1987) when evaluating and developing site-specific discharge requirements. Site-specific discharge limitations shall be made part of the sewer use regulation described in item #2 above.

c. The permittee shall evaluate new users of the sewage treatment plant and designate Significant Industrial Users (SIUs). An SIU shall be:

- Any user which would be subject to Categorical Pretreatment Standards (Industries subject to 40 CFR Chapter 1 Subchapter N Parts 400 - 471) if the discharge were to a Publicly Owned Treatment Works;

- Any user which discharges an average of 25,000 gallons per day or more of process wastewater (excluding sanitary, noncontact cooling and boiler blowdown);

- Any user which discharges a…