Maintenance of wastewater treatment plant

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Guidelines for the Design, Construction, Operation, and Maintenance of Small Wastewater Treatment Facilities with Land Disposal Commonwealth of Massachusetts Department of Environmental Protection Division of Watershed Permitting Revised November 2014 TABLE OF CONTENTS PAGE LIST OF TABLES & FIGURES 3 INTRODUCTION 4 ACKNOWLEDGEMENTS 6 I LAWS AND REGULATIONS 7 II FILING FOR A GROUNDWATER PERMIT 15 III REQUIRED SUBMITTALS 20 IV CALCULATION OF WASTEWATER FLOWS 34 V INFILTRATION/INFLOW & SEWER SYSTEM MAINTENANCE 37 VI SITE EVALUATION & SITING CRITERIA 38 VII EFFLUENT DISPOSAL 42 VIII GENERAL REQUIREMENTS FOR TREATMENT PLANTS 52 A.TREATMENT REQUIREMENTS 52 B.GENERAL WWTF REQUIREMENTS 54 IX DESIGN CRITERIA 62 A. COLLECTION SYSTEM 62 B. PUMPING STATIONS 69 C. FLOW EQUALIZATION 72 D. PRELIMINARY AND PRIMARY TREATMENT 73 E. SECONDARY TREATMENT 77 F. SECONDARY CLARIFICATION 86 G. NITROGEN & PHOSPHORUS REMOVAL 88 H. FILTRATION 95 I. OTHER ADVANCED TREATMENT PROCESSES 97 J. DISINFECTION 100 K. RESIDUALS MANAGEMENT/FOG REQUIREMENTS/ GREASE TRAPS 104 L. INSTRUMENTATION 107 M.PROPRIETARY TECHNOLOGIES 112 N. SCHOOLS & OTHER SEASONAL FACILITIES 113 X OPERATION & MAINTENANCE PLAN 115 XI GROUNDWATER PERMIT REQUIREMENTS 124 XII CERTIFICATION & PERFORMANCE GUARANTEES 126 Final 2 Revised Nov. 2014 I. LAWS AND REGULATIONS There are several laws and regulations implemented by federal, state and local governmental agencies that apply to the planning, installation, operation and maintenance of small sewage treatment facilities. This section presents a brief explanation of the major regulatory programs with jurisdiction over small sewage treatment facilities. It also contains a table listing possible regulatory requirements applicable to any particular project. Copies of other laws and regulations can be obtained from these links: (1) Massachusetts General Laws are available online at https://malegislature.gov/Laws/GeneralLaws (2) Most MassDEP regulations are available at the MassDEP website at http://www.mass.gov/dep/ or the State House Bookstore, Room 116, State House, Boston, MA 02133, telephone (617) 727-2834; (3) for local bylaws, ordinances and regulations the Town Clerk at the Town Hall for the municipality in which the facility is to be located; and (4) for federal laws and regulations, visit the Federal Bookstore website at http://bookstore.gpo.gov or telephone (866) 512-1800. A. STATE The primary statutory authority for regulation of small sewage treatment facilities is contained in the Massachusetts Clean Waters Act, M.G.L. c. 21, §§ 26-53. This state law established a Division of Water Pollution Control within MassDEP. The responsibilities of the Division of Water Pollution Control have since been transferred to MassDEP's Division of Wastewater Management (Division). The Division's duties and responsibilities include enhancing the quality and value of water resources and establishing a program for the prevention, control, and abatement of water pollution. The Division is specifically authorized by the Act to establish programs and adopt regulations that include: 1. standards of minimum water quality applicable to the various waters of the Commonwealth; 2. a permit program establishing effluent limits and procedures applicable to the management and disposal of pollutants including, where appropriate, prohibition of discharges; 3. requirements for dischargers to establish monitoring, sampling, record keeping and reporting procedures and facilities, and to submit data gathered to the Division; 4. regulations requiring proper operation and maintenance of wastewater treatment facilities; 5. rules and regulations needed to properly administer laws regarding water pollution control and protect the quality and value of water resources; and Final 7 Revised Nov. 2014 6. requirements for the Division to approve reports and plans of wastewater treatment facilities, or any part thereof, and to inspect the construction of such facilities to determine compliance with the approved plans. Additionally, M.G.L. c. 111, §17 requires towns, districts and other persons to submit their proposed system for the disposal of drainage and sewage to MassDEP for its approval. The Code of Massachusetts Regulations (CMR) is a compilation of state agency regulations. Agency regulations implement statutes passed by the state legislature. The state laws are referred to as the Massachusetts General Laws (M.G.L.). MassDEP regulates discharges of pollutants below ground surface through the Ground Water Discharge Permit Program (“the Program”) regulations at 314 CMR 5.00 requiring potential dischargers to seek plan approval and obtain a discharge permit. Those regulations also impose limitations on the amount and type of pollutants allowed to be discharged to assure that the receiving waters meet minimum water quality standards established by those regulations as well as the Surface Water Quality Standards, 314 CMR 4.00. Each ground water discharge permit also contains monitoring and reporting requirements to verify compliance with permit limitations and conditions, including a requirement for the installation of monitoring wells. Plans for a minimum of three ground water monitoring wells (one upgradient and two downgradient) for compliance monitoring must be submitted to the Program as part of a completed hydrogeological report. The plans must specify the type of wells, their locations, depth, screen selection and method of construction, development and sampling. As part of the submittal for a groundwater permit, the applicant must also submit an engineering report and a certification statement that the engineering report and the plans and specifications have been prepared in accordance with all applicable standards. A copy of the certification form can be found at the MassDEP website. The formal submission of the plans and specifications is not required until ninety (90) days prior to the start up of the facility. In limited circumstances, particularly dealing with new technology, MassDEP may request a set of plans and specifications when the permit application is submitted. Procedures for plan approval and permit issuance are specified in the Permit Procedure regulations at 314 CMR 2.00. Generally, the project proponent submits a completed discharge permit application, along with the certification form, to MassDEP. The project proponent must submit a copy of the application and accompanying documents to both the Boston office and the appropriate regional office of MassDEP A project proponent must submit sufficient engineering and hydrogeological information to explain the public health and environmental impacts of the proposed project to MassDEP. After receiving sufficient information, MassDEP prepares a draft permit and Final 8 Revised Nov. 2014 a fact sheet detailing the significant factual, legal, methodological and policy questions considered by MassDEP during its review of the project. The draft permit and fact sheet are sent to the applicant, the applicant's consultants and the local Board of Health for review and comment. Following this informal review, MassDEP makes a tentative determination to either issue or deny the permit and begins the formal public comment process. Notice of the tentative determination will be published in accordance with the procedures outlined in 314 CMR 2.00. Publication of the notice begins a thirty-day public comment period on the tentative permit determination to MassDP. If the applicant or permittee requests a public hearing, or if MassDEP decides that a public hearing is in the public interest, MassDEP schedules and conducts the hearing in a community within the area affected by the facility or discharge. If a public hearing is deemed necessary, the permit issuance or denial is postponed until all issues raised during the hearing have been evaluated and MassDEP has prepared a final response summary and determination. At the conclusion of the thirty-day public comment period, MassDEP issues the permit or a final determination to deny it. If no comments objecting to the permit's issuance or terms were received during the public comment period, the permit becomes effective on the date of issuance. If comments objecting to the permit's issuance or terms were received during the thirty-day comment period, the permit becomes effective thirty days after its issuance. Any person aggrieved by the permit's issuance, terms, or MassDEP's determination to deny the permit may file a request for an adjudicatory hearing with MassDEP's Office of Administrative Appeals within the thirty-day period following permit issuance. MassDEP’s Operation And Maintenance and Pretreatment Standards For Wastewater Treatment Works and Indirect Dischargers regulations at 314 CMR 12.00 require permittees to submit an Operation and Maintenance manual and a Staffing Plan to MassDEP for review and approval ninety (90) days prior to the start up of the facility. In addition, the Certification of Operators of Wastewater Treatment Facilities regulations at 257 CMR 2.00 require that a certified wastewater treatment plant operator must be employed by the permittee to operate and maintain the treatment facilities. The project may require a filing under 301 CMR 11.00, the Massachusetts Environmental Policy Act (MEPA). These regulations establish review thresholds at 310 CMR 11.03 that determine whether MEPA review is required. B. LOCAL At the local level, primary regulatory authority over the design, construction and use of small sewage treatment facilities that discharge less than 10,000 gallons per day is vested in the Board of Health. Title 5 of the State Environmental Code at 310 CMR 15.003 requires the Board of Health to issue a disposal system construction permit prior to the construction of any subsurface sewage disposal system, in most instances. M.G.L. Final 9 Revised Nov. 2014 c. 111, §31 authorizes Boards of Health to adopt reasonable health regulations. Many Boards have used this authority to promulgate bylaws, ordinances or regulations more stringent than MassDEP's Title 5 regulations. The primary regulatory authority for facilities greater than 10,000 gallons per day is vested in MassDEP. Unlike Title 5, there is no formal local review process or local jurisdiction over 10,000 gallons per day, but the applicant should check with the Board of Health to determine if any additional requirements beyond those imposed by state laws and regulations apply to the proposed project, regardless of size. Fats, Oils and Greases (FOG) are separated from the sewage collection system and stored for transport to approved facilities. The FOG material shall be handled, treated and disposed as a solid waste and subject to M.G.L. c. 111, s. 150A and 310 CMR 15.000 as appropriate. C. FEDERAL MassDEP, not the federal government, has jurisdiction over the groundwater discharge permit program. The Underground Water Source Protection Program also known as the Underground Injection Control Program (UIC) is a federal program designed to protect underground sources of drinking water from pollution. The United States Environmental Protection Agency (EPA) pursuant to the Federal Safe Drinking Water Act, 42 U.S.C.A §§300f to 300j-26, administers this program. The EPA divides injection practices into five classes. Class I includes deep disposal wells for industrial and municipal waste. Class II covers all injection wells related to oil and gas production including wells used to store hydrocarbons, which are liquid at standard temperature and pressure. Class III includes wells, which inject liquids for the in situ extraction of minerals or energy. Class IV includes the injection of hazardous and high level radioactive wastes into and above usable ground water. Class V covers all other injection wells including those used to discharge treated sewage. In Massachusetts, the EPA has delegated the UIC Program to MassDEP of Environmental Protection. MassDEP has promulgated regulations at 310 CMR 27.00 to implement the State's UIC Program in accordance with the federal requirements. For purposes of the UIC Program, a well is defined as a "bored, drilled, or driven shaft, a dug hole, or seepage pit whose depth is greater than the largest surface dimension; or, an improved sinkhole; or, a soil absorption system. Please contact MassDEP for further information on UIC applicability. Final 10 Revised Nov. 2014 LIST OF ACRONYMS USED ON SUMMARY TABLES BOH – Board of Health CFR- Code of Federal Regulations CMR- Code of Massachusetts Regulations DPS- Massachusetts Department of Public Safety EOEA- Massachusetts Executive Office of Energy & Environmental Affairs EPA- Federal Environmental Protection Agency FWPCA- Federal Water Pollution Control Act MassDEP- Massachusetts Department of Environmental Protection MEPA- Massachusetts Environmental Policy Act M.G.L.- Massachusetts General Laws NPDES- National Pollution Discharge Elimination System O&M- Operation and Maintenance U.S.C.- United States Code WWTF- Wastewater Treatment Facilities Final 11 Revised Nov. 2014 TABLE 1 REGULATORY SUMMARY Component or Activity Application or Filing Program Name Statutory Authority Regulatory Reference Implementing Agency Regulated Required Permit Procedures M.G.L. c. 2l, §27 314 CMR 2.00 MassDEP Surface Water Discharge Permit Treatment Plant Application/Plans M.G.L. c. 21, §27 314 CMR 3.00 MassDEP Surface Water Quality Standards M.G.L. c. 2l, §27 314 CMR 4.00 MassDEP Treatment Plant Hydrogeological Report Application/Report M.G.L. c. 2l, §27 314 CMR 5.00 MassDEP Discharge Treatment Plant and Application Certification Ground Water Discharge Permit M.G.L. c. 21, §27 314 CMR 5.00 MassDEP Discharge Form Sewer System Extensions and Collection System Application/Plans M.G.L. c. 21, §27 314 CMR 7.00 MassDEP Connections Operation & Maintenance of O&M Manual and Staffing Treatment Plants/Sewers M.G.L. c.21, §27 314 CMR 12.00 MassDEP Treatment Facilities Plan Administrative Penalty Violations of State Laws and M.G.L. c. 21A, §16 310 CMR 5.00 MassDEP Regulations Regulations Construction within 100 ft. Local Conservation Wetland Protection of Wetland or 200 ft. of a Notice of Intent M.G.L. c. 131, §40 310 CMR 10.00 Commission/MassDEP Riverfront Area Activity Requiring Federal 33 U.S.C. §1341; Water Quality Certification Plans 314 CMR 9.00 MassDEP Permit M.G.L. c. 21, §27 Plans for Backflow Cross Connections Water Supply M.G.L. c. lll, §160A 310 CMR 22.00 MassDEP Preventor TABLE 1 CONTINUED Component or Activity Application or Regulatory Program Name Statutory Authority Implementing Agency Regulated Filing Required Reference Underground Injection Discharge into Wells Registration Form M.G.L. c. 21, §27 310 CMR 27.00 MassDEP Control Wastewater Treatment Plant Application/ M.G.L. c. 21, §34A & State Board of Certification of Operator 257 CMR 2.00 Operation Certification Exam 34B Operators of WWTF's Environmental Code General Environmental M.G.L. c. 21A, §13 310 CMR 11.00 MassDEP Application & Administration Massachusetts Environmental Environmental Issuance of State Permit M.G.L. c.30, §§61-62H 301 CMR 11.00 State MEPA Office/EOEEA Policy Act Notification Form M.G.L. c. 91, §l-63 310 CMR 9.00 MassDEP Waterways License Waterways State Board of Registration of Application/ Engineer Registration Design Engineer M.G.L. c. 112, §81 D-T 250 CMR 1:00-6.00 Professional Engineers and Exam Land Surveyors Air Pollution Regulations Diesel Generator Plans M.G.L. c. lll, §142 A-E 310 CMR 7.00 MassDEP Final 13 Revised Nov. 2014 TABLE 1 CONTINUED Component or Activity Application or Regulatory Statutory Authority Implementing Agency Program Name Regulated Filing Required Reference Ambient Air Quality M.G.L. c. lll, §142 A-E 310 CMR 6.00 MassDEP Disposal Work s Construction Subsurface Disposal Application/ 310 CMR M.G.L c. 2lA, §13 Local Board Health/MassDEP Permit System Plans 15.000 Application/ Local Building Building Permit Building M.G.L. c. 143 780 CMR Plans Inspector/MassDEP Plumbing Permit Plumbing Application M.G.L. c. 143, §13 248 CMR 2.00 Local Plumbing Inspector/DPS Electric Permit Wiring Application M.G.L. c. 143, §3L 527 CMR 12.00 Local Wiring Inspector/DPS Application/ Flammable Liquid Storage Storage tanks M.G.L. c. 148, §1-59 527 CMR 14.00 Local Fire Chief/DPS Plans 310 CMR Local Planning Board/Zoning Zoning By-Laws Subdivision Plan Plans M.G.L. c. 40A 15.000 Board Transportation & Disposal 310 CMR Hauler’s Permit Application M.G.L. c.21A, §13 Local Board of Health of Sludge/Septage/Grease 15.000 FWPCA §404 Dredge and Fill Construction in Navigable 40 CFR Parts 220- Federal Army Corps of Application 33 U.S.C. §1344 Permit Water 232 Engineers Discharge to Surface 40 CFR Parts 122- NPDES Permit Application 33 U.S.C. §1342 Federal EPA Waters 125 M.G.L. c.111, s150 Local BOH/MassDEP Solid Waste Fats,Oils & Grease Application M.G.L. C.111. s150A 310CMR16.00 310CMR19.00 Final 14 Revised Nov. 2014 II. FILING FOR A GROUNDWATER DISCHARGE PERMIT The MassDEP Groundwater Discharge Permit Program regulates the location, construction, operation and monitoring of all wastewater treatment plants designed for flows exceeding 10,000 gallons per day. It should be noted that there may be instances where a prospective permittee may wish to pursue a MassDEP groundwater discharge permit for a discharge of less than 10,000 gallons per day of treated sanitary wastewater to the ground where the applicant seeks to obtain a higher effluent loading to the ground than available under a Title 5 system. New systems, unpermitted systems and some systems to be modified will undergo a review process that will assure compliance with 314 CMR 5.00 and will result in the issuance of an individual groundwater discharge permit or coverage under a general permit. For both types of permit, a Hydrogeologic Evaluation is required. The applicant should begin the permitting process with a pre-permit scoping meeting with MassDEP. Following this meeting, the applicant will develop and submit to MassDEP a scope of work for a hydrogeological investigation that is specific to the proposed site in accordance with 314 CMR 5.09, including consideration of downgradient receptors. Upon MassDEP approval of the scope of work, the applicant will then prepare a hydrogeological evaluation report consistent with that scope. The completed hydrogeological evaluation report will be submitted to the MassDEP with the BRP WP 83 application form, the fee and other required materials. The MassDEP approval of the hydrogeological evaluation report will direct the applicant to apply for a groundwater discharge permit through the submittal of either a Notice of Intent for Coverage under a General Permit or the appropriate individual groundwater discharge permit application. GENERAL PERMIT COVERAGE: 314 CMR 5.13 gives MassDEP the authority to issue general permits to one or more categories of dischargers whose discharges warrant similar control measures. Currently there are four categories of General Permit: 1) 50,000 gpd sewage treatment plants for Publicly Owned Treatment Works POTW); 2) 50,000 gpd sewage treatment plants for Private Sewage Treatment Facilities (PSTF) (BRPWP81); and 3) Carwashes (BRPWP80) 4) Commercial Coin-operated Laundromats (BRPWP 80) The permits and fact sheets can be viewed online at: http://www.mass.gov/eea/agencies/massdep/water/approvals/general-permits-associated-with- Final 15 Revised Nov. 2014 brp-80-and-brp-81.htmlIf your project is eligible for a general permit, the applicant submits a Notice of Intent (NOI) for coverage under the appropriate category. The NOI submittal will include: • Project Description • Design Criteria (Flow rate, loadings, treatment units) • Engineering Report Certification • Plans and Specification Certification • Hydrogeologic Evaluation Certification It is important to note that by submitting an NOI for coverage under a general permit the applicant waives any right to request an adjudicatory hearing relative to the MassDEP’s issuance or denial of the general permit coverage. The Mass DEP will review the NOI for administrative and technical components. This review will determine whether coverage can be granted or not. If coverage is approved, the applicant will receive the public notice form to be published in accordance with 314 CMR 2.06. At a minimum, the public notice is sent to be published in the Environmental Monitor with MEPA. Forms and directions for these publications are provided to the applicant. The comment period is 30 days and comments are limited to the applicant’s eligibility for coverage. Coverage under the general permit is effective 45 days from the date the notice was published, unless the applicant is otherwise notified. Upon approval, the applicant will be sent copies of the general permit and general permit fact sheet and an approval letter describing the facility, approved design flow, assigned permit number, specific monitoring wells to be sampled, and, for new facilities, inspection and clear water test requirements. The letter will also state the submittals required to be made prior to the start up of the plant. If coverage cannot be approved, the applicant may receive a deficiency letter stating what information the application is missing, a denial letter stating why coverage cannot be approved or will be directed to apply for an individual permit. INDIVIDUAL PERMIT: There are three different types of applications for individual permits: BRPWP79 – Individual Sewage Treatment Plant BRPWP84 – Reclaimed Water System BRPWP85 – Individual Discharge Permit not in WP79 or WP80 After completion and approval of the hydrogeological evaluation the applicant submits the appropriate application which includes: • Engineering Report with Certification • Hydrogeologic Certification Final 16 Revised Nov. 2014 • Plans and Specification Certification If the site is located in a Zone II or interim wellhead protection area (IWPA) then the applicant must notify the Public Water Supply of the submittal. If the application is for a reclaimed water system (WP84), then the application will need to include the information specified in 314 CMR 20.11 and 20.12, a reuse management plan and a service and use agreement if the reclaimed water is to be used by persons other than the permittee. The Mass DEP will review the application for administrative and technical components based on the timelines for review established for each permit category under 310 CMR 4.00. If the application is complete a draft permit and fact sheet are sent to the applicant. The applicant will receive the public notice form to be published in accordance with 314 CMR 2.06 At a minimum, the public notice is sent to be published in the Environmental Monitor with MEPA. Forms and directions for these publications are provided to the applicant. The comment period is 30 days. Upon approval, the applicant will be sent copies of the individual permit and plan approval letter. The letter will state the submittals required to be made prior to the start up of the plant and will specify any inspection and clear water test requirements. The permit will be issued and will be effective on issuance or, if comments were received, 30 days from the date of issuance. If the application is incomplete or cannot be approved, the applicant will receive a deficiency letter stating what information the application is missing. The letter will include timeframes for the applicant to address any deficiencies. Please note that the permit application for an individual permit for a new or modified WWTFs no longer requires that engineering plans and specifications be submitted with the application. Instead, an expanded engineering report accompanied by a certification statement from a Massachusetts Registered Professional Engineer stating that the plans and specifications have been prepared in accordance with applicable standards are required. The formal submission of engineering plans & specifications for the proposed wastewater treatment facility to the MassDEP is required 90 days prior to the startup of the facility. These plans must be stamped, signed and dated by a Massachusetts Registered Professional Engineer. The plans and specifications must describe in detail the collection, treatment and disposal components of the WWTF. It should be noted that , in accordance with 314 CMR 5.09A (4) and (5), the MassDEP may request that plans and specifications be submitted with the application or at any time during the application’s review process. Some facilities will be required to provide Financial Assurance Mechanisms (FAMs) per 314 CMR 5.15. Standard form documents are used for the FAMs and are provided to the Final 17 Revised Nov. 2014 permittee during the review of the application. These documents must be approved, signed and submitted to the MassDEP 90 days prior to facility startup. Permit applications must also include a ground water monitoring plan and a certification statement that the hydrogeological evaluation of the WWTF disposal site and its surroundings has been done and approved by MassDEP. Specifics regarding these submittals are contained in each of the permit application packages and a Certification Statement form is also provided. Application packages are available from the DEP Internet web site at: http://www.mass.gov/eea/agencies/massdep/water/wastewater/groundwater-discharge- permitting.html RENEWAL OF PERMITS: Groundwater Discharge Permits are issued for up to 5 years. Persons who want to continue the permitted activity either under an Individual permit or through coverage under a General permit, must submit a renewal application six months prior to the expiration date of the permit. The permit renewal application categories are: BRPWP80 and 81 for renewal of coverage under a General Permit BRPWP11 and 12 for renewal with or without modification for an Individual Permit BRPWP82 Administrative Renewal for an Individual Permit Renewal of coverage under a General Permit and renewal of an Individual permit follow the same process of review and issuance (administrative review, technical review and public notice) as the original application. The BRPWP82, Administrative Renewal application, is a new category of renewal for Individual permits issued under 314 CMR 5.00. This application has shorter timelines and lower fees than the other renewal categories. In order to qualify for an Administrative renewal the permittee must meet all the criteria listed in 314 CMR 5.12(9): • Application submitted 180 days prior to the expiration date • No modifications required or requested • Facility is operating in compliance with 314 CMR 5.00, CMR 12.00, the operation and maintenance plan and any applicable Best Management Practices (BMPs) • A Massachusetts Registered Engineer inspects and certifies that the facility is in compliance • MassDEP determines that current limits are protective and stricter limits are not required • Facility is in compliance with the Financial Assurance Mechanisms (if applicable) • Facility is not required to submit an engineering report for treatment plant evaluation, typically conducted in operational year 14 through 19 or beyond per 314 CMR 5.12 (7) & (8) • Facility does not treat industrial wastewater • BRPWP82 application is signed and certified as required by 314 CMR 5.14 Final 18 Revised Nov. 2014 The flow diagram below depicts the application process for the Individual Permit, obtaining coverage under the General Permit and the renewal of both types of permits. GROUNDWATER DISCHARGE PERMIT PROCESS PREREQUISITE FOR PREREQUISITE FOR HYDROGEOLOGIC EVALUATION 314 CMR 5.09 -DETERMINES SITE SUITABILITY INDIVIDUAL PERMIT GENERAL PERMIT -DETERMINES PERMIT REQUIRED 314 CMR 5.00, 20.00 314 CMR 5.13 -Individual or General -ALERTS APPLICANT OF ZONE II REQUIREMENTS (TOC) Sewage treatment plant (POTW & PSTF) Issued/Public Notice by DEP Reclaimed water 50,000 gpd sewage (POTW & PSTF) Other Carwash Individual Rule Projects (IRP) RENEWAL Industrial Wastewater (IWW) WP11 - With plan WP82 SUBMIT NOTICE OF apporval SUBMIT PERMIT ADMINISTRATIVE INTENT (NOI) FOR WP12 - Without plan RENEWAL APPLICATION COVERAGE approval -Admin review and technical review as determined by category 30 Day DEP Review MEET CRITERIA OF 314 CMR 5.12(9) NO NOT APPROVED NOT APPROVED APPROVED APPROVED YES Public Notice sent to: PUBLIC -Newspaper DRAFT PERMIT & NOTICE -Secretary of State -File for Individual Address FACT SHEET -Environmental Permit Address Deficiencies Monitor -File for different Deficiencies General Permit 30 Day Comment -Application INTERNAL PERMIT Denied REVIEW REISSUE Deficiencies PERMIT NOT addressed PUBLIC NOTICE: -Newspaper Coverage -Secretary of State effective 45 days ADDRESS COMMENTS -Environmental Monitor from publishing of 30 Day comment notice Application not approved ADDRESS COMMENTS DEP Approval Third party appeal letter with limited to eligibility of requirements ISSUE/DENY PERMIT Appeal coverage prior to startup Final 19 Revised Nov. 2014 III. REQUIRED SUBMITTALS All permit applications, notices of intent, and supporting documents shall be submitted to the local Board of Health, the appropriate MassDEP Regional Office and the Boston Office of MassDEP’s Wastewater Management Program at least 180 days prior to the date upon which an action by MassDEP is desired. The documents submitted for formal approval shall include an engineering report, a hydrogeologic report, a completed discharge permit application, , certification statement on final plans and specifications, an operation and maintenance plan, a staffing plan, documentation of ownership and financial resources and contracts for operational services. The engineering report and any plans and specifications requiredshall be stamped, dated and signed by a qualified professional engineer registered to practice in the Commonwealth of Massachusetts. If the engineer’s discipline is not noted on the stamp, then the discipline shall be printed below the imprint. No construction of wastewater treatment works shall take place until the application or notice of intent has been approved by MassDEP and the discharge permit has been issued. A. HYDROGEOLOGIC REPORT The first step in the process is the preparation and approval of the hydrogeological report assessing the site characteristics and the fate and effects of the treatment plant discharge. A qualified geologist or engineer must prepare this report. The completed hydrogeological evaluation report will be submitted to the MassDEP with the BRP WP 83 application form, the fee and other required materials. The MassDEP approval of the hydrogeologic evaluation report will direct the applicant to apply for a groundwater discharge permit through the submittal of either a Notice of Intent for Coverage under a General Permit or the appropriate individual groundwater discharge permit application. At the time of submittal for a groundwater discharge permit, the proponent will also submit the certification statement (Appendix A) signed by a Massachusetts Registered Professional Engineer that the present day site conditions and the design parameters for this facility are consistent with what was found at the time the hydrogeological report was initially performed. The hydrogeological report shall include the following information: The Long-Term Acceptance Rate (LTAR) shall be determined through percolation testing and/or infiltration rate testing in accordance with the scope of work approved by MassDEP. In all cases the soil must be tested under saturated conditions (soaked) as described in Title 5 or in documentation relative to the infiltrometer testing. The appropriateness of the methods is determined by the size of the facility and the accepting soil characteristics. If the design discharge is less than 20,000 gpd, a Final 20 Revised Nov. 2014 percolation test is the preferred method. The exception to this would be for a small system, which may be in tight (Class III) soils where an infiltration rate would yield the most reliable data. For systems greater than 20,000 gpd an infiltration test shall be performed according to acceptable engineering practice or the technical reliability demonstrated to the satisfaction of MassDEP. However, if the soils are Class I, MassDEP may accept a percolation test. MassDEP should be contacted on this instance to determine the appropriate testing method. For systems utilizing drip dispersal, percolation tests would be the preferred method. The report shall minimally include (for primary and reserve area(s)): • An analysis of the ability of site to accept and disperse flow at the proposed discharge rate. (Maximum Monthly Flow) • Evaluation of the mounding potential, presence of confining layers, thickness and estimated aerial extent of unsaturated receiving formation. Mounding calculations or modeling to be evaluated for maximum monthly flow (defined as 80% of the design flow based on Title 5 calculations. However, it should be noted that the disposal field design is based on 100% of the design flow) for a duration of 90 days. Maximum daily flow may be higher, but the sum of the daily flows for the months over the 90 days shall not exceed the maximum monthly flow for the 90- day period evaluation of the site. • Evaluation must include (if applicable) the effect of impermeable or semi- permeable barriers within the potential groundwater mound. These would include but not limited to foundations and retaining walls. • Proposed appropriate monitoring well locations based upon known or inferred groundwater flow direction under various seasonal conditions and geology. (Minimum of one upgradient and two down gradient locations. MassDEP may require more based upon site complexity, proximity to sensitive areas or design of the system.) • Evaluation of likely impacts on current and potential down gradient and cross gradient receptors. The list includes wells with in 1 mile (public and private), wastewater discharges (such as septic systems), subsurface construction and infrastructure (basements and pipelines), water supply protection areas (Zone I, Zone II, Zone A), and Outstanding Resource Water. • Hydraulic conductivity and infiltration rate. • Groundwater flow direction. • Determine ambient water quality (groundwater and if present nearby surface water). • A summary of all soil borings and geotechnical evaluations. • Test pits and Infiltration test data performed by a Certified Soil Evaluator, (or engineer or geologist with Department approval). Data forms to be included in the report. • If within Zone II or well head protection area evaluate time of travel from Final 21 Revised Nov. 2014 discharge to water supply. Also do time of travel evaluation to any sensitive receptor. • Location of other wastewater disposal systems, which are near the proposed site. Indicate whether or not the mounds will interfere. • Location (Lat, Long to nearest second), surveys to use the most recent standard datum. Currently it is a geographic coordinate reference system based on the NAD83 horizontal datum and NAVD88 vertical datum. The datum utilized shall be clearly stated. • Proximity to the nearest wetlands and surface water bodies. • Show proposed disposal areas on the site plan. • Stormwater management concepts and their interaction with the proposed collection and dispersal systems. B. ENGINEERING REPORT An engineering report shall be required for all projects involving sewage collection, treatment and disposal systems. It is required at the time of submittal for the following permits: BRP WP 11, BRP WP 68, BRP WP 79, BRP WP 84 and BRP WP 85. The purpose of this report is to present in clear, concise form a description of the project, the results of site evaluations, solutions examined, the basis of design for the recommended systems, and the associated environmental and public health impacts. The report shall be written for easy public understanding and serve as a permanent summary of the principle information needed by MassDEP for conceptual approval of the project. Data on structural, mechanical, electrical and HVAC designs may be excluded at this point of project development except that reference to such elements shall be made as necessary to understand the functional operation of the proposed systems. The engineering report shall be stamped, dated and signed by a qualified professional engineer registered to practice in the Commonwealth of Massachusetts as either a civil or sanitary engineer. If the engineer’s discipline is not noted on the stamp, then the discipline shall be printed below the imprint. At the time of submittal for a groundwater discharge permit, the proponent will submit a certification statement (Appendix A) from a Massachusetts Registered Professional Engineer stating that the engineering report has been prepared in accordance with applicable standards The engineering report shall include, at a minimum, the following items: • a detailed description of the project including all phasing of development which is expected over a 20 year planning period; • all pertinent data concerning relevant local, state and federal permits, approvals, orders of conditions and variances; • a description of the geographic location and setting of the project including a locus map and preliminary site plan at an appropriate scale; • a description of the geology, hydrology and topography with an appropriate plan showing key features, surface drainage and contours of the project site; • a listing of the current and projected population both resident and nonresident involved in the proposed project; Final 22 Revised Nov. 2014 • the location of all public and private water supply wells, springs, surface reservoirs including tributaries, and other features of public health significance within a half mile of the project site; • the amount and source of water supply for the proposed project; • a delineation of all wetlands resource areas (as defined in 310 CMR 10.00) within the project boundaries and/or within 100 feet of any proposed construction activity; • a description of the proposed sewage collection system for the project with a reference to the overall site plan; • a description of the probable future expansion of the collection system together with information on how these areas will be served; • an explanation of the relationship between the point of generation of sewage to the proposed treatment facility, including rough elevations and locations where pump stations may be necessary; • a description of the various locations within the project site available for wastewater treatment and disposal and the reasons for choosing the one recommended; • an identification of the proximity of residences or developed areas to the treatment and disposal areas; • a discussion of the type of treatment and disposal processes studied, including water reclamation alternatives, and the reasons for choosing the recommended alternative; • a description of how the proposed plan fits into the municipal wastewater management plan, including, where appropriate the potential for future transfer of ownership to the city, town, or district, and the possibility of including capacity for sewage flows from neighboring properties; • identification of any local standards for wastewater treatment plant design and operation and how those local standards will be met; • a complete description of the basis of design of the collection, treatment and disposal systems including design population (resident and nonresident), as well as flow contributing common facilities (recreational hall, laundries, health clubs, restaurants, etc.) strength of sewage, total daily sewage flow (including infiltration allowances where appropriate), and daily peak, monthly average and maximum hour (peak) flow; • a description of all pumps, including type, number, and operating range; • a description of all major unit processes giving capacity, equipment type, and operation factors under varying conditions (i.e. seasonal flow variations or project phasing), redundancy requirements and method of operation. Include design calculations for each unit process; • a discussion of the degree and type of treatment and adequacy for present and future needs; • a hydraulic profile showing water surface elevations at average, maximum, and minimum flow (peak) conditions; • a general layout and flow diagram, including return lines, chemical feed lines, and sampling points shall be provided; Final 23 Revised Nov. 2014 • a description of process control; • a staffing analysis • the results of all site testing and evaluations including the location and log for all soil borings, deep observation holes, and percolation tests; • a list of chemicals used in each process and chemical metering; and • a description of other ancillary items, such as, but not limited to; HVAC, lighting, safety, MSDS sheets, fire suppression, and compliance sampling. 1 2 C. PLANS AND SPECIFICATIONS , Plans and specifications are required to be submitted ninety (90) days prior to facility start up. A certification statement (Appendix A) from a Massachusetts Registered Professional Engineer stating that the plans and specifications have been prepared in accordance with applicable standards is now required to be submitted with the permit applicationIt should be noted that, in accordance with 314 CMR 5.09A (4) and (5), the MassDEP may request that plans and specifications be submitted with the application or at anytime during the applications’s review process. Regardless of when the documents are submitted to MassDEP, all plans and specifications must satisfy the requirements outlined below. All plans shall bear a suitable title showing the name and location of the project and shall show the scale in feet, a directional arrow indicating north, date, the name, address and telephone number of the engineer and the imprint of his registration seal with signature and date. The plans shall be clear and legible. They shall be drawn to a scale that will permit all necessary information to be plainly shown. The size of the plans shall be 24” x 36”. The datum used and its relation to mean sea level datum (USC&GS) should be indicated. Locations and logs of all test borings, percolation tests and deep observation holes shall be shown on the plans. Detailed plans shall consist of plan views, elevations, sections and supplementary views that, together with the specifications and general layouts, provide the working information for the contract and construction of the various processes. The plans shall include dimensions and relative elevations of all structures, the location and outline form of equipment location and size of piping, ground water levels, ground elevations (existing and finish grades) and hydraulic profiles. Plans shall include a profile (to scale) of the soil absorption system (SAS), which depicts the mounded, and high groundwater elevation below the SAS. Complete technical specifications for the construction of sewers, pumping stations, and treatment and disposal systems including all appurtenances shall accompany the plans. The specifications accompanying the construction drawings shall include, but not be limited to, all construction information not shown on the drawings which is necessary to inform the 1 The permittee should also check with the BWP air permitting section in the appropriate regional office to determine whether the project would trigger any of the air regulation thresholds. 2 When the Division of Municipal Services finances a project, they may require early submission of plans and specifications. Final 24 Revised Nov. 2014

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