Exhibit I-Final Permit for 24DP0636-Piccowaxen MS.pdf

VIA ELECTRONIC MAIL

Mr. Glenn R. Belmore Risk Manager, CSBA Charles County Public Schools P.O. Box 2770 La Plata, Maryland 20646

RE: Discharge Permit for Piccowaxen Middle School WWTP, located at 12834 Rock Point Road, Newburg, Charles County, Maryland 20664, State Discharge Permit 24-DP-0636; NPDES Permit MD0023451

Dear Mr. Belmore:

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.

United States Environmental Protection Agency (USEPA) regulations require permittees to submit Discharge Monitoring Reports (DMRs) electronically, as well as all other required documents listed in the discharge permit. The Maryland Department of the Environment (MDE) uses NetDMR, a nationwide system developed by USEPA, for all permittees that must submit DMRs.

Facility personnel who will be preparing, signing, and submitting DMRs will need to get access before the due date of the first DMR submission. Information on accessing NetDMR Support Portal is at the following link (this link is case-sensitive) at:

https://usepa.servicenowservices.com/oeca_icis?id=netdmr_homepage. Additionally, if you encounter issues with NetDMR accounts, access, or electronic submissions, please review information available at:

https://mde.maryland.gov/programs/water/Compliance/Pages/NetDMR.aspx or seek assistance from MDE’s Compliance Program promptly by emailing mde.netdmr@maryland.gov or calling

(410) 537-3520.

03/03/2026

Mr. Glenn Belmore

Also, enclosed please find the following documents for your future reference pertaining to the above discharge permit:

- A copy of the Federal Register published on April 16, 2024, 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 June 17, 2024. 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.

- A copy of the table of the Minimum Monitoring Requirements.

If you have any questions, please contact Mahendra Chawla, Project Manager, Surface Discharge Permits Division, through Email at Mahendra.Chawla@maryland.gov.

Sincerely, Naomi Howell, Program Manager Wastewater Pollution Prevention and Reclamation Program Water and Science Administration

Enclosures cc: Ms. Lisa Laschalt, Director, Environmental Health, Charles County Health Department (electronic copy) Ms. Marie King, Division Chief, Wastewater Compliance – Central Division (electronic copy) Mr. Matt Rowe (electronic copy) Mr. Dennis Rasmussen (electronic copy)

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:

Charles County Board of Education

P.O. Box 2770

5980 Radio Station Road

La Plata, Charles County, Maryland 20646

TO DISCHARGE FROM: Piccowaxen Middle School Wastewater Treatment Plant (WWTP)

LOCATED AT: 12834 Rock Point Road

Newburg, Charles County, Maryland 20664

THROUGH OUTFALL: 001A (Facility Effluent)

TO: An unnamed tributary of the Ditchley Prong, designated as Use I waters:

Protected for water contact recreation and non-tidal warm water aquatic life;

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 3 4 5 1

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 : 2 4 - D P - 0 6 3 6

E f f e c t i v e

D a t e : 0 5 / 0 1 / 2 0 2 6

E x p i r a t i o n

D a t e : 0 4 / 3 0 / 2 0 3 1

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 3 0

Permit No. 24-DP-0636 (NPDES MD0023451) Page No. 2 of 30

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. “Maximum (or Minimum) daily discharge” limitation means the highest (or lowest) allowable discharge of a pollutant measured during a calendar day (or any

24-hour period) that reasonably represents the calendar day for sampling purposes.

a. For pollutants with limitations expressed in units of mass (e.g., Pounds/day) as a maximum daily average, the “daily discharge” is calculated as the total mass of the pollutant discharged over the day.

b. For pollutants with limitations expressed in other units of measurement

(e.g., concentration) as a maximum (or minimum) daily average, the “daily discharge” is calculated as the average measurement of the pollutant over the day.

2. “Maximum (or minimum) weekly average" 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. 24-DP-0636 (NPDES MD0023451) Page No. 3 of 30

3. “Maximum (or minimum) monthly average” 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. “Maximum (or minimum)” limit means the highest (or lowest) 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. 24-DP-0636 (NPDES MD0023451) Page No. 4 of 30

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 titrimetric or colorimetric 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. 24-DP-0636 (NPDES MD0023451) Page No. 5 of 30

T. “Secondary Treatment” means the treatment of sewage to produce effluent equal to or better than the following quality, except as provided for 40 CFR §133.103, or paragraphs

(d), (e) or (f) of 40 CFR §133.105:

1. Five-day biochemical oxygen demand (BOD5):

a. 30 milligrams/liter—average for a 30-day period;

b. 45 milligrams/liter—average for a 7-day period;

c. The 30-day average percent removal shall not be less than 85 percent.

2. Total Suspended Solids (TSS):

a. 30 milligrams/liter—average for a 30-day period,

b. 45 milligrams/liter—average for a 7-day period;

c. The 30-day average percent removal shall not be less than 85 percent.

3. Bacterial control: As required to meet water quality standards.

U. “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.

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

Permit No. 24-DP-0636 (NPDES MD0023451) Page No. 6 of 30

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

X. “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. 24-DP-0636 (NPDES MD0023451) Page No. 7 of 30

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, except as noted

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 (5/1 to 10/31)

(11/1 to 4/30)

0.52

3.13

0.78

4.69

N/A

5.0

7.5

N/A

N/A

BOD5, Percent Removal (6) 85 % minimum monthly average

TSS 3.13 4.69 N/A 30 45 N/A

TSS, Percent Removal (6) 85 % minimum monthly average

Total Ammonia

Nitrogen as N (Interim Limits) *

(5/1 to 10/31)

(11/1 to 4/30)

0.07

0.10

0.41

0.33

0.70

1.0

3.9

3.2

Total Ammonia

Nitrogen as N (Final Limits) *

(5/1 to 10/31)

(11/1 to 4/30)

0.03

0.04

0.15

0.25

0.30

0.40

1.4

2.4

* The permittee shall follow the Special Condition G pertaining to a compliance schedule and submission of a progress report to meet the total ammonia nitrogen as N final limits.

Effluent Characteristics

Effluent Limits

Maximum Minimum

Fecal Coliform 14 MPN/100 ml monthly median value N/A

Total Residual Chlorine (5) Nondetectable level (See footnote- 8) N/A pH 8.5 6.5

Dissolved Oxygen (All Year)

7.0 mg/l at anytime

An annual average flow of 0.0125 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. 24-DP-0636 (NPDES MD0023451) Page No. 8 of 30

A. Effluent Limitations, Continued

Footnotes for Special Condition II.A 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) The Potomac River Lower Tidal (PRLT) is on the 303(d) list as the impaired waters for Fecal

Coliform, PCBs in fish tissue, TSS, TN,TP and PFOS in fish tissue. Piccowaxen Middle School

WWTP is one of the insignificant point source facilities located in PRLT sub watershed

(Chesapeake Bay Segment POTMH_MD). This facility has not been given any PCB Waste Load

Allocation because the design capacity of the facility is less than 0.1 mgd. 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) 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

Piccowaxen Middle School WWTP. The wastewater shall be dechlorinated to reduce effluent total residual chlorine concentration to the nondetectable level (See definition I.M of the discharge permit).

(6) In accordance with 40CFR §133.102, the 30-day average percent removal for BOD5 and TSS shall not be less than 85 (eighty-five) percent as the minimum level of effluent quality attainable by the secondary treatment. Refer to the footnotes 11 and 12 for further details for calculations and reporting requirements toward compliance to the BOD5 and TSS percent removal effluent limitations (See Definition I.T).

Permit No. 24-DP-0636 (NPDES MD0023451) Page No. 9 of 30

B. 1. Minimum Monitoring Requirements:

a. For Effluent Discharged at Outfall 001A:

The effluent characteristics listed below in Table B(1)(a) shall be monitored all the time at the Sampling Point (Definition I.R). The permittee shall ensure that the effluent samples taken at the above stated sampling point are representative of the effluent quality discharged at the Outfall 001A.

Effluent Characteristics Monitoring Period Measurement Frequency Sample Type

BOD5 (7)(11)(12) All Year One per week 24-hour composite

Total Suspended Solids (7)(11(12) All Year One per week 24-hour composite

BOD5, Percent Removal (7)(11)(12) All Year TBD Calculated

TSS, Percent Removal (7)(11)(12) All Year TBD Calculated

Total Ammonia Nitrogen as N (7) All Year One per week 24-hour composite

Fecal Coliform (7) All Year One per week Grab

Total Residual Chlorine (7) (8) All Year One per day Grab

Dissolved Oxygen (7) All Year One per day Grab pH (7) All Year One per day Grab

Flow (7)(9)(10) All Year Continuous Recorded (10)

* The permittee shall conduct the flow-proportional composite monitoring at all times unless receiving approval from the Department for the time-proportional composite monitoring. The time

-proportional composite sampling may be approved when the permittee demonstrates the wastewater flow of the sampled stream is constant (i.e., the flow rates measured do not vary more than ±10 percent of the average flow rate over the sampling period).

Permit No. 24-DP-0636 (NPDES MD0023451) Page No. 10 of 30

B. 1. Minimum Monitoring Requirements, continued

b. For Raw Wastewater Influent at Sampling Point 101A:

The quality of the wastewater influent entering the Piccowaxen Middle School WWTP shall be monitored at Influent Chamber all the time as shown below:

Wastewater Influent Characteristics Monitoring Period Measurement Frequency * Sample Type

BOD5

(7)(11)(12) All Year One per year Grab

Total Suspended Solids (7)(11)(12) All Year One per year Grab

* Option 3 (for one per year monitoring frequencies):

The monitoring frequency to determine BOD5/TSS removal efficiency (in percentage) will be on an annual basis. The permittee shall select a calendar month and a minimum of one day (in that calendar month) in each calendar year to collect samples from the influent and effluent to calculate the removal efficiency. The permittee may take additional samples of BOD5 and TSS in the influent on different days within the selected calendar month. All the sampling results for this requirement shall be reported on the Monthly Operating

Report (MOR) for the same calendar month.

For the compliance determination of the percent removal requirement, the individual results of BOD5/TSS in the influent and effluent collected on the same day must be incorporated to calculate the monthly average concentrations of the specific parameter in the influent and effluent. (Example: If the influent samples are collected for multiple days in a calendar month, the effluent sampling results from the same corresponding days must be used to calculate the monthly average concentrations and to report the percent (%) removed as a minimum monthly average for the same calendar month and reported in the month of December

Discharge Monitoring Report (DMR) as well to fulfill the annual monitoring requirement).

These monthly average concentrations shall be applied to calculate the percent removal efficiency using formula listed in the footnote 12 and the results of the percent removal shall be reported on the December month’s DMR at the end of each calendar year. The permittee shall also prepare and submit a report as a copy of record (COR) along with the December month’s NetDMR. The COR shall provide details, including but not limited to, name of facility, sampling time (day(s), month, and year), individual results as well as monthly average concentrations of influent and effluent, laboratory sheets and pertinent information for analytes, and results of the percent removal calculation results.

Permit No. 24-DP-0636 (NPDES MD0023451) Page No. 11 of 30

B. 1. Minimum Monitoring Requirements, continued:

Footnotes for Special Condition II.B.1 (Minimum Monitoring Requirements) :

(7) "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), BOD5 percent removal (81010), Total Suspended Solids (00530), Total Suspended Solids percent removal (81011)), Total

Ammonia Nitrogen as N (00610) , Fecal Coliform (74055), Total Residual Chlorine (50060), Dissolved Oxygen (00300), pH (00400), and Flow (50050).

(8) The Minimum monitoring requirements of One 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 Piccowaxen Middle School 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.

(9) Flows shall be reported in million gallons per day (mgd) to at least the nearest 1,000 gallons per day. (Example: A flow of 24,699 gallons per day shall be reported as 0.025 mgd.). For each calendar month, flows shall be reported on the Monthly Operating Report (MOR) as daily individual results and on the Discharge Monitoring Report (DMR) as monthly average (mgd) and daily maximum (mgd).

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

(11) Wastewater influent samples for BOD5 and TSS shall be collected per the sampling type and reporting frequency specified in above (Special Condition II.B(1)(b), page 10). These measurements shall be utilized to calculate BOD5 and TSS percent removed using the formula listed below in footnote 12 and results shall be used to comply with the Percent removal effluent limits of BOD5 and TSS (Special Condition II.A above). Any effluent excursion of the percent removal limit (Special Condition II.A, Page 7) reported at the end of each monitoring period will be considered as violation for the full period as specified.

(12) At the end of each reporting period, the permittee shall incorporate BOD5 and TSS monthly average concentrations in the influent and effluent (both reported on a monthly DMR for the calendar month of the influent sampling), and calculate monthly percent (%) of a parameter

(BOD5 or TSS) removed using the following formula:

𝑀𝑜𝑛𝑡ℎ𝑙𝑦 𝐴𝑣𝑒𝑟𝑎𝑔𝑒 𝑃𝑒𝑟𝑐𝑒𝑛𝑡 (%) 𝑜𝑓 𝑃𝑎𝑟𝑎𝑚𝑒𝑡𝑒𝑟 𝑅𝑒𝑚𝑜𝑣𝑒𝑑 = { (𝐴 − 𝐵)

𝐴 } × 100

Where:

A = Monthly Average Concentration of Parameter in Influent, mg/l

B = Monthly Average Concentration of Parameter in Effluent, mg/l

The results (monthly average percent (%) of BOD5 and TSS removed) shall be reported in the

DMR submitted for the last calendar month of the reporting period. (Example: If the monitoring frequency of the percent (%) removal is one per quarter, the results shall be reported in the

DMRs for March, June, September, and December).

Permit No. 24-DP-0636 (NPDES MD0023451) Page No. 12 of 30

B. 2. Report Submittal Requirements

No. Report Description *

Report Submittal

Deadline (From

Permit’s Effective

Date) Permit Condition

1. Submit ammonia compliance plan (Upgrade vs. Connect) Within 6 months

Special Condition

II.G

2. Submit the final plan and funding approach for the selected option

Within 15 months

Special Condition

II.G

3. Begin implementation

(construction or interconnection)

Within 24 months

4.

Complete implementation Within 33 months

Special Condition

II.G

5. Achieve final compliance with the ammonia limit or cease discharge to the receiving water

Within 36 months

Report providing status to meet total ammonia nitrogen as N final limits

Yearly, after 36 months from the

Permit’s Effective

Date

* 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.

Permit No. 24-DP-0636 (NPDES MD0023451) Page No. 13 of 30

C. Influent Restriction

1. The permittee shall notify MDE at least 60 days prior to the anticipated introduction of wastewater either by direct connection or by truck or rail from a significant industrial user or process. If MDE determines that the proposed wastewater contribution is a substantial change and requires modification of the permit to establish effluent limitations and/or monitoring requirements, it shall notify the permittee of this determination within 30 days of the permittee’s notification. The proposed discharge shall be deemed to be approved unless the permittee receives the above notification from MDE.

2. The permittee shall notify MDE as soon as they know, or have reason to believe, that:

a. any activity has occurred or will occur which would result in the discharge, on a routine or frequent basis, of any toxic pollutant which is not limited by the permit, if that discharge will exceed one hundred micrograms per liter; or

b. any activity has occurred or will occur which would result in any discharge, on a non-routine or infrequent basis, of a toxic pollutant which is not limited by the permit, if that discharge will exceed five hundred micrograms per liter.

3. If the laboratories are active, the permittee shall develop a Best Management

Practices Plan for the control of laboratory discharges within six months of the effective date of this permit. The plan shall include procedures to eliminate intentional and accidental discharges of potentially toxic wastewaters such as organic solvents, organic compounds and toxic metals into the sanitary sewer and be available for inspection by the Department.

4. The permittee shall install signs at each sink in its laboratories prohibiting the introduction of organic solvents, organic compounds and toxic metals into the sanitary sewer within three months of the effective date of this permit.

5. The permittee shall institute the use of approved alternative disposal devices for organic solvents and other toxic components of laboratory wastewater. The wastewater collected shall be disposed of according to all applicable laws and regulations.

6. The permittee shall use silver recovery devices on all silver containing wastewaters in the photographic laboratories within three months of the effective date of this permit.

7. The permittee shall designate a person to be the resource at the school for information on appropriate disposal of non-domestic wastewaters. The name of the designee shall be sent to the Department within one month of the issuance of this permit.

Permit No. 24-DP-0636 (NPDES MD0023451) Page No. 14 of 30

D. New Pollutants and Water Quality Standards

The permittee shall identify all pollutants expected to be discharged in the permit application. It must notify the Department in writing within 30 days of detecting any pollutant not included in the application or permit record. If monitoring data or other reliable information indicate that a pollutant or any discharge has the reasonable potential to cause or contribute to exceeding water quality standards in COMAR

26.08.02.03, the Department may reopen and modify this permit to establish effluent limitations or additional monitoring requirements. Enforcement will be based on violations of specific permit conditions.

E. Reapplication for a Permit

No later than 12 months before the Expiration Date of the Permit, unless permission for a later date has been granted by the Department, the permittee shall submit a new application for a permit or notify the Department of the intent to cease discharging by the expiration date. In the event that a timely and complete reapplication has been submitted and the Department is unable, through no fault of the permittee, to issue a new permit before the expiration date of this permit, the terms and conditions of this permit continue and remain fully effective and enforceable. The renewal application is required by that date in accordance with the requirements of MDE's Watershed

Permitting Plan under which all discharge permits in a watershed should be issued in the same year.

F. Climate Change Resiliency Requirements

The effects of climate change are projected to be more pronounced in the coming decades. As a result, the intensity and frequency of extreme weather events may quickly overload the wastewater facility hydraulically, disrupt the operation in the treatment works, and cause the potential endangerment of aquatic life and public health. The permittee shall enhance the climate change resiliency of the facility through the following measures:

1. The permittee shall conduct annual assessment and maintenance, as needed, of the facilities at the treatment works to confirm they are adequate to address the potential inflow surges during the extreme weather events. The assessment shall be based on the history of storms and their corresponding peak flows and waste loads recorded at the facility. The records of evaluations and maintenance shall be documented and made available to the Department upon request.

No later than six months from the effective date of this permit, the permittee shall develop and submit a report to the Department that explains the permittee’s plan to address peak flow surges during extreme weather events cited in Section

II.F.1 above.

Permit No. 24-DP-0636 (NPDES MD0023451) Page No. 15 of 30

2. The permittee shall plan for impacts to power supplies during extreme weather events based on the history of storms and the demand from critical operations at the facility. Please refer to General Conditions III.B.4 “Adverse Impact” and

III.B.8 “Power Failure” of the discharge permit for further details.

No later than six months from the effective date of this permit, the permittee shall develop and submit a report to the Department that explains the permittee’s plan for addressing potential impacts on power supplies during extreme weather events cited in Section II.F.2.

G. Compliance Schedule for Meeting Total Ammonia Nitrogen as N Effluent Limits

As per Code of Federal Regulation (CFR), 40 CFR § 122.47 “Schedules of compliance”, The permittee must achieve compliance with the final ammonia effluent limitations specified in

Section II.A of this permit within a maximum timeframe of 36 months from the effective date of the permit employing the following:.

1. Interim Milestones and Actions

To ensure timely progress, the permittee shall meet the following enforceable milestones:

Milestone Deadline

Submit ammonia compliance plan Within 6 months of the permit's effective date

Submit the final plan and funding approach

Within 15 months

Begin Upgrade/Modification Within 24 months

Complete Upgrade/Modification Within 33 months

Achieve compliance with the Final ammonia limit

Within 36 months

2. To upgrade/modify the existing WWTP, the strategy must include a schedule for design, permitting, funding, construction, and commissioning of ammonia treatment improvements (e.g., nitrification, process controls).

3. The permittee shall submit progress reports to the Maryland Department of the

Environment (MDE) within 14 days after each milestone date, documenting completion or explaining any delay. Each report shall include the status of construction, challenges encountered, and updated timelines, if applicable. The Department may require additional reporting to verify progress toward the final compliance deadline.

4. No extensions of the 36-month final deadline will be granted unless specifically authorized in writing by MDE and consistent with applicable law and regulation.

Permit No. 24-DP-0636 (NPDES MD0023451) Page No. 16 of 30

I I I . G E N E R A L C O N D I T I O N S

A. Monitoring and Reporting

1. Representative Sampling

Samples and measurements shall be taken at times that are representative of the quantity and quality of the discharge, and at evenly spaced intervals.

2. Monthly Monitoring Results

a. Discharge Monitoring Reports

For Facilities Using NetDMR:

Monitoring results obtained during each calendar month shall be summarized and submitted electronically using the NetDMR. Results shall be submitted to the Department via NetDMR no later than the 28th of the month following the end of the reporting month.

If the permittee encounter problems in electronic submission for any month using the NetDMR, the permittee must consult the MDE’s

Compliance Program by telephone at (410) 537-3520 or by email at mde.netdmr@maryland.gov to avoid missing the deadline for submission of the above stated documents.

b. Monthly Operating Reports (MOR)

The permittee shall submit monthly operating reports on a form acceptable to the Compliance Program. For each calendar month, the permittee shall submit to the Department a signed original of the MOR as an attachment to Copy of Record (COR) via NetDMR in electronic format concurrently with the Discharge Monitoring Report submission postmarked no later than the 28th day of the month following the reporting month.

If the permittee encounter problems in electronic submission for any month using the NetDMR, the permittee must consult the MDE’s

Compliance Program by telephone at (410) 537-3520 or by email at mde.netdmr@maryland.gov to avoid missing the deadline for submission of the above stated documents.

Permit No. 24-DP-0636 (NPDES MD0023451) Page No. 17 of 30

c. Toxic Chemical Reporting

Any data collected according to Department's latest updated "Toxic

Pollutant Monitoring Protocol and Reporting Requirements for Toxic

Chemical Testing Analytical Data, as amended” which can be downloaded from Department’s website link:

https://mdewwp.page.link/TCT (this link is case-sensitive)” being submitted to the Department, either in fulfillment of Special Conditions

II.B or pursuant to the toxic chemical testing requirement, pretreatment requirements or toxic metals or organic data collected on a voluntary basis, must be accompanied by laboratory data reports. At a minimum, these reports shall include, the name of the facility, the date(s) of sampling, beginning and ending sample time, place of sampling collection, the sample type (grab, composite, etc.), the sample description (influent or effluent), the preservation method, the analytical method used for each parameter, the analytical method detection limit, the date of analysis, the name of person performing the analysis, the analytical result, and the name and address of the laboratory performing the analyses. Chain-of-custody forms shall also be submitted.

This information along with all supporting documentations, including but not limited to the chain-of-custody forms, shall be submitted electronically to the Department immediately via email at mde.municipalwwpermits@maryland.gov.

3. Sampling and Analysis Methods

Analytical and sampling methods shall conform to test procedures for the analysis of pollutants as identified in 40 CFR Part 136 - "Guidelines

Establishing Test Procedures for the Analysis of Pollutants."

4. 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

Permit No. 24-DP-0636 (NPDES MD0023451) Page No. 18 of 30 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).

5. Analytical Laboratory

Within 30 days after the effective date of this permit, the permittee shall submit to the Department the name and address of the analytical laboratory (including the permittee's own laboratory) which is used to perform the monitoring required by this permit.

If the laboratory changes during the effective period of this permit, the permittee shall notify the Department of the new laboratory within 30 days after the change.

6. Monitoring Equipment Maintenance

a. The permittee shall calibrate and maintain all monitoring and analytical instrumentation to ensure accuracy of measurements.

b. Environment Article, Section 9-343 provides that any person who falsifies, tampers with, or knowingly renders inaccurate, any monitoring device or method required to be maintained under this permit shall, upon conviction, be punished by a fine of not more than $10,000 per violation, or by imprisonment for not more than six months per violation, or by both.

7. Recording of Results

For each measurement or sample taken pursuant to the requirements of the permit, the permittee shall record the following information:

a. the date, exact place and time of sampling or measurement;

b. the person(s) who performed the sampling or measurement;

c. the dates analyses were performed;

d. the person(s) who performed each analysis;

e. the analytical techniques or methods used; and

Permit No. 24-DP-0636 (NPDES MD0023451) Page No. 19 of 30

f. the results of such analyses.

8. Additional Monitoring by Permittee

If the permittee monitors any pollutant at the location(s) designated herein more frequently than required by this permit, using approved analytical methods as specified above, the results of such monitoring shall be included in the calculation and reporting of the values required in the Discharge Monitoring

Report. The increased frequency shall also be reported. The results of any other monitoring performed by the permittee shall be made available to the

Department upon request.

9. Record Retention

All data used to complete the permit application and all records and information resulting from the monitoring activities required by this permit, including all records of sampling and analyses performed, calibration and maintenance of instrumentation, and recordings from continuous monitoring instruments, shall be retained for a minimum of 5 (five) years. This period shall be extended automatically during the course of litigation or when requested by the

Department.

B. General Requirements

1. Permit Noncompliance - Notification Requirements

All discharges authorized herein shall be consistent with the terms and conditions of this permit. If, for any reason, the permittee does not comply with or will be unable to comply with any permit condition, the permittee shall, within 24 hours, notify the Department by telephone at (410) 537-3510 during work hours or at (866) 633-4686 during evenings, weekends, and holidays. The permittee shall provide the Department with the following information in writing within five days of such oral notification.

a. a description of the noncomplying discharge including the name of the stream and the impact upon the receiving waters;

b. cause of noncompliance;

c. the duration of the period of noncompliance and the anticipated time the condition of noncompliance is expected to continue;

d. steps taken by the permittee to reduce and eliminate the noncomplying discharge;

e. steps to be taken by the permittee to prevent recurrence of the condition of noncompliance;

Permit No. 24-DP-0636 (NPDES MD0023451) Page No. 20 of 30

f. a description of the accelerated or additional monitoring to determine the nature and impact of the noncomplying discharge; and

g. the results of the monitoring described in f. above.

2. Change in Discharge

The permittee shall report any anticipated facility expansions, production increases, or process modifications which will result in new, different or an increased discharge of pollutants by submitting a new application at least 180 days prior to the commencement of the changed discharge except that if the change only affects a listed pollutant and will not violate the effluent limitations specified in this permit, by providing written notice to the Department.

Following such notice, the permit may be modified by the Department to include new effluent limitations on those pollutants.

3. Facility Operation and Quality Control

All waste collection, control, treatment and disposal facilities shall be operated in a manner consistent with the following:

a. Facilities shall be operated efficiently to minimize upsets and discharges of excessive pollutants.

b. The permittee shall provide an adequate operating staff qualified to carry out operation, maintenance and testing functions required to ensure compliance with this permit. Superintendents and operators must be certified by the Board of Waterworks and Waste Systems Operators located at Montgomery Park Business Center, 1800 Washington

Boulevard, STE- 410, Baltimore, Maryland 21230 in accordance with

Title 12 of Environmental Article, Annotated Code of Maryland, and

Section 26.06.01 of the COMAR.

c. Facility maintenance work, which adversely affects or may adversely affect the discharge quality shall be scheduled during non-critical water quality periods.

4. Adverse Impact

The permittee shall take all reasonable steps to minimize or prevent any adverse impact to waters of the State or to public health resulting from noncompliance with any effluent limitation specified in this permit, including any contributions to noncompliant discharges from increased frequency and intensity of extreme precipitation events, and must perform the accelerated or additional monitoring necessary to determine the nature and impact of the noncompliant discharge.

Permit No. 24-DP-0636 (NPDES MD0023451) Page No. 21 of 30

5. Bypassing

Any bypass of treatment facilities is prohibited unless the bypass does not cause any violations of the effluent limitations specified in Special Condition II.A, and is for essential maintenance to assure efficient operation, or unless the permittee can prove that:

a. the bypass is unavoidable to prevent loss of life, personal injury, or substantial physical damage to property, damage to the treatment facilities which would cause them to become inoperable, or substantial and permanent loss of natural resources; and

b. there are no feasible alternatives to the bypass; and

c. the Department receives notification pursuant to General Condition

III.B.1 above. Where the need for a bypass is known (or should have been known) in advance, this notification shall be submitted to the

Department for approval at least ten days before the date of the bypass or at the earliest possible date if the period of advance knowledge is less than ten days; and

d. The Department may approve an anticipated bypass, after considering its adverse effects; if the Department determines that it will meet the three conditions listed above in Sections a through c of this General Condition

III.B.5.

6. Conditions Necessary for Demonstration of Upset

An upset shall constitute an affirmative defense to an action brought for noncompliance with technology-based effluent limitations only if the permittee demonstrates, through properly signed, contemporaneous operating logs, or other relevant evidence, that:

a. an upset occurred and that the permittee can identify the specific cause(s) of the upset;

b. the permitted facility was at the time being operated in a prudent and workman-like manner and in compliance with proper operation and maintenance procedures;

c. the permittee submitted a 24-hour notification of upset in accordance with the reporting requirements of General Condition III.B.1 above;

d. the permittee submitted, within five calendar days of becoming aware of the upset, documentation to support and justify the upset; and

e. the permittee complied with any remedial measures required to minimize adverse impact.

Permit No. 24-DP-0636 (NPDES MD0023451) Page No. 22 of 30

In any enforcement proceeding, the permittee seeking to establish the occurrence of an upset has the burden of proof.

7. Sewage Sludge Requirements

The permittee shall comply with all State and federal laws and regulations regarding Sewage Sludge Management, and with any regulations promulgated pursuant to Environment Article, Section 9-230 et seq. or to the Clean Water

Act, Section 405 (d). A Sewage Sludge Utilization Permit is required for the collection, handling, burning, storage, treatment, land application, disposal, or transportation of sewage sludge, processed sewage sludge, or any product containing these materials in Maryland. If the sludge is hauled out of the State for disposal, a transportation permit must be obtained from the Department.

8. Power Failure

The permittee shall maintain compliance with the effluent limitations and all other terms and conditions of this permit in the event of a reduction, loss or failure of the primary source of power to the wastewater collection and treatment facilities.

9. Right of Entry

In accordance with 40 CFR §122.41(i), the permittee shall allow the Secretary of the Department, the Regional Administrator of the Environmental Protection

Agency, and their authorized representatives (including an authorized contractor acting as a representative), upon presentation of credentials and other documents as required by the law, to:

a. Enter upon the permittee's premises where a regulated facility or activity is located or conducted, or where records must be kept under the conditions of this permit;

b. Have access to and copy, at reasonable times, any records that must be kept under the conditions of this permit;

c. Inspect at reasonable times any facilities, equipment (including monitoring and control equipment), practices, or operations regulated or required under this permit; and

d. Sample or monitor at reasonable times, for the purposes of assuring permit compliance or as otherwise authorized by the Clean Water Act, any substances or parameters at any location.

Permit No. 24-DP-0636 (NPDES MD0023451) Page No. 23 of 30

10. Property Rights/Compliance With Other Requirements

The issuance of this permit does not convey any property rights in either real or personal property, or any exclusive privileges, nor does it authorize any injury to private property, invasion of personal rights, or any infringement of federal, State or local laws or regulations.

11. Reports and Information

a. Upon request, the permittee shall provide to the Department, within a reasonable time, copies of records required to be kept by this permit.

The permittee shall also furnish to the Department, within a reasonable time, any information which the Department may request to determine whether cause exists for modifying, revoking and reissuing, or terminating this permit; or to determine compliance with this permit.

b. All applications, reports or information submitted to the Department shall be signed and certified as…