GeneralEngineering Requirements December 1998 G19 E. Dam Safety Evaluation of Lagoon Embankment State dam safety regulations( Chapter 173-175 WAC)apply to embankments that can impound a maximum volume of 10 acre-feet or more of water of any quality, including untreated or partially-treated wastewater, settled sludge, treated effluent, or reclaimed water. Projects likely to include embankments subject to dam safety regulations include wastewater treatment lagoons, as described in Chapter G3, and reclaimed water storage ponds or quarantine ponds, as described in Chapter El Gl-1.5 Local Government Permits and Approvals Some of the more common permits and approvals from local governments that may be required for construction of sewers, pump stations, or wastewater treatment facilities are described below GI-1.5.1 On-Site Sewage Systems Local health jurisdictions have responsibility for the review and approval of small on-site sewage systems, as defined in G1-5.3, with a maximum design capacity of 3, 500 gpd. DOH and Ecology have this responsibility for systems exceeding 3, 500 gpd, as described in G1-14IC ocal health jurisdictions may contract with DOH for the review and approval of large on-site systems(between 3, 500 and 14, 500 gpd) GI-1.5.2 Building permits Counties and cities require permits to construct permanent buildings or ditions to existing buildings GI-1.5.3 Shoreline Management Act Permit (Shoreline Permit) A Shoreline Permit(also called a Substantial Development Permit)is required for any development or activity valued at $2, 500 or more that is located on the water or shoreline area or any development which materially interferes with normal public use of the water. The area landward from the water where a shoreline permit is required varies, but in general means the area landward for 200 feet from the ordinary high-water mark and includes flood plains and wetlands Ecology has oversight authority and certain approval authorities for this program, in accordance with Chapter 90.58 RCW and the state regulations adopted pursuant to this statute Gl-1.5.4 Flood Plain Development Permit Local governments participating in the NFIP are required to review proposed construction projects to determine if they are in identified flood plains as shown on the NFIP maps. If a project is located in a mapped flood plain, the local government must require that a development permit be obtained prior to GI-1.5.5 Air Quality The local air authority or Ecology has review and approval authority for the construction of new sources or modifications to existing sources of air
General Engineering Requirements December 1998 G1-9 E. Dam Safety Evaluation of Lagoon Embankments State dam safety regulations (Chapter 173-175 WAC) apply to embankments that can impound a maximum volume of 10 acre-feet or more of water of any quality, including untreated or partially-treated wastewater, settled sludge, treated effluent, or reclaimed water. Projects likely to include embankments subject to dam safety regulations include wastewater treatment lagoons, as described in Chapter G3, and reclaimed water storage ponds or quarantine ponds, as described in Chapter E1. G1-1.5 Local Government Permits and Approvals Some of the more common permits and approvals from local governments that may be required for construction of sewers, pump stations, or wastewater treatment facilities are described below. G1-1.5.1 On-Site Sewage Systems Local health jurisdictions have responsibility for the review and approval of small on-site sewage systems, as defined in G1-5.3, with a maximum design capacity of 3,500 gpd. DOH and Ecology have this responsibility for systems exceeding 3,500 gpd, as described in G1-1.4.1C. Local health jurisdictions may contract with DOH for the review and approval of large on-site systems (between 3,500 and 14,500 gpd). G1-1.5.2 Building Permits Counties and cities require permits to construct permanent buildings or additions to existing buildings. G1-1.5.3 Shoreline Management Act Permit (Shoreline Permit) A Shoreline Permit (also called a Substantial Development Permit) is required for any development or activity valued at $2,500 or more that is located on the water or shoreline area or any development which materially interferes with normal public use of the water. The area landward from the water where a shoreline permit is required varies, but in general means the area landward for 200 feet from the ordinary high-water mark and includes flood plains and wetlands. Ecology has oversight authority and certain approval authorities for this program, in accordance with Chapter 90.58 RCW and the state regulations adopted pursuant to this statute. G1-1.5.4 Flood Plain Development Permit Local governments participating in the NFIP are required to review proposed construction projects to determine if they are in identified flood plains as shown on the NFIP maps. If a project is located in a mapped flood plain, the local government must require that a development permit be obtained prior to construction. G1-1.5.5 Air Quality The local air authority or Ecology has review and approval authority for the construction of new sources or modifications to existing sources of air
December 1998 Criteria for Sewage Works Design pollution. If the proposal is in an area where an established local air authority has jurisdiction, then the local air authority has review and approval authority otherwise Ecology has this authority GI-1.6 ndian tribes Any development activity, including construction of wastewater facilities, on tribal reservation land may be subject to specific tribal requirements that may not be included in this manual. The appropriate tribal planning office should be contacted prior to considering any construction on tribal reservation land. When a proposed project is being considered on nontribal lands and may affect treaty-reserved resources or areas of tribal significance, the project proponent should consult with the appropriate tribal governments during the project review process G1-2 Overview of applicable Planning requirements According to RCw9048110, all engineering reports, plans, and specifications for new construction, improvements, or extensions of existing sewerage systems, sewage treatment, or disposal plants or systems, shall be submitted to and be approved by ecology before construction A 1994 revision to this section provides that Ecology may delegate this authority for review and approval of engineering reports, plans, and specifications to local governments requesting such delegation and meeting criteria established by the department. See gl-5.2 for additional information on delegation of engineering approval authority Gl-2.1 Objective The objective of this section is to briefly describe the three different levels of planning required for wastewater collection and treatment facilities in the State of Washington, GMA comprehensive planning, general sewer plans, and project specific planning. This section also explains the reasons for the different levels of planning, including the legal basis, as well as the relationships between the three principal levels of planning that are required. This section also includes a brief discussion of the requirements of the GMa related to the development of comprehensive plans. a more detailed discussion of the two other levels of planning, General Sewer Plan, and Project Specific Planning, Design, and Construction, is contained in G1-3 and Gl-4, respectively G1-2.2 Sequence of Planning Planning for wastewater collection and treatment facilities begins with the capital facilities plan element of the comprehensive land use plan(comprehensive plan)required for counties or cities that are required to, or choose to, plan under the gmA. Information in these plans provides the foundation for a general sewer plan. For non-GMa communities, the planning process begins with the development of a general sewer plan After the approval of a general sewer plan, site specific planning begins with the development of an engineering report/facility plan that is prepared and submitted to Ecology for approval. Upon approval of the engineering report/facility plan, construction plans and specifications are developed and submitted for approval. See Figure Gl-1 for a flow chart outlining this sequence
G1-10 December 1998 Criteria for Sewage Works Design pollution. If the proposal is in an area where an established local air authority has jurisdiction, then the local air authority has review and approval authority; otherwise Ecology has this authority. G1-1.6 Indian Tribes Any development activity, including construction of wastewater facilities, on tribal reservation land may be subject to specific tribal requirements that may not be included in this manual. The appropriate tribal planning office should be contacted prior to considering any construction on tribal reservation land. When a proposed project is being considered on nontribal lands and may affect treaty-reserved resources or areas of tribal significance, the project proponent should consult with the appropriate tribal governments during the project review process. G1-2 Overview of Applicable Planning Requirements According to RCW 90.48.110, all engineering reports, plans, and specifications for new construction, improvements, or extensions of existing sewerage systems, sewage treatment, or disposal plants or systems, shall be submitted to and be approved by Ecology before construction may begin. A 1994 revision to this section provides that Ecology may delegate this authority for review and approval of engineering reports, plans, and specifications to local governments requesting such delegation and meeting criteria established by the department. See G1-5.2 for additional information on delegation of engineering approval authority. G1-2.1 Objective The objective of this section is to briefly describe the three different levels of planning required for wastewater collection and treatment facilities in the State of Washington, GMA comprehensive planning, general sewer plans, and project specific planning. This section also explains the reasons for the different levels of planning, including the legal basis, as well as the relationships between the three principal levels of planning that are required. This section also includes a brief discussion of the requirements of the GMA related to the development of comprehensive plans. A more detailed discussion of the two other levels of planning, General Sewer Plan, and Project Specific Planning, Design, and Construction, is contained in G1-3 and G1-4, respectively. G1-2.2 Sequence of Planning Planning for wastewater collection and treatment facilities begins with the capital facilities plan element of the comprehensive land use plan (comprehensive plan) required for counties or cities that are required to, or choose to, plan under the GMA. Information in these plans provides the foundation for a general sewer plan. For non-GMA communities, the planning process begins with the development of a general sewer plan. After the approval of a general sewer plan, site specific planning begins with the development of an engineering report/facility plan that is prepared and submitted to Ecology for approval. Upon approval of the engineering report/facility plan, construction plans and specifications are developed and submitted for approval. See Figure G1-1 for a flow chart outlining this sequence
GeneralEngineering Requirements december 1998 G1-11 ewer Plan Non-GMA Start wAc173-240-050 WAc173-240-050 Wastewater acilities element Plans an Permit issuance WAc173240-075,080, Ecology with schedule review LEGEND Accept GMA Growth Management Act NPDES National Pollutant Discharge SERP State Environmental Review Washington Administrative Code Figure G1-1. Sequence of Planning, Design, and Construction
General Engineering Requirements December 1998 G1-11 Capital Facility Plan WAC 365-195 and WAC 173-240-050 Ecology review/ issuance Permit issuance by end of construction Ecology review/ approval Plans and specifications WAC 173-240-070 Construction WAC 173-240-075, 080, 090, 095, 170, 180 Ecology compliance review Administrative order with schedule Ecology permit oversight Permit application State/NPDES Fail Ecology SERP review if necessary Ecology review/ approval Ecology review/ approval General Sewer Plan WAC 173-240-050 Non-GMA GMA Non-wastewater projects GMA Growth Management Act NPDES National Pollutant Discharge Elimination System SERP State Environmental Review Process WAC Washington Administrative Code LEGEND Accept Start Wastewater facilities element Engineering Report/ Facility Plan WAC 173-240-060 Ecology equivalency review Figure G1-1. Sequence of Planning, Design, and Construction
1-12 December 1998 Criteria for Sewage Works Design G1-2.3 Growth Management Act Comprehensive Plans The gMa was enacted by the 1990 Legislature and codified in Chapter 3670A RCW Administrative regulations were adopted by Ecology in 1992 and are contained in Chapter 365-195 WAC. The gMa and its regulations require that counties with specified <ipulations and rates of growth, the cities within those counties, and other counties and ne cities within those counties which choose to, must meet all the requirements of the GMA, which includes the development of comprehensive plans Comprehensive plans must consist of a map or maps and descriptive text covering objectives, principles, and standards used to develop the comprehensive plan. The plan must be internally consistent and contain certain elements that are consistent with a future land use map. The comprehensive plan and any amendments to the plan must be adopted by the local government following a public participation process One of the required elements of the comprehensive plan, which relates to the planning for plan element. The capital facilities plan element must meet the requirements of RCW 9 and construction of wastewater collection and treatment facilities, is the capital facilitie 3670A070(3)and WAC 365-195-315. These requirements include An inventory of existing capital facilities( which includes sanitary sewer systems)owned by public entities, including the locations and capacities of these facilities A forecast of the future needs for the capital facilities The proposed locations and capacities of expanded or new capital facilities At least a six-year plan that will finance the capital facilities A requirement to reassess the land use element if the probable funding falls short G1-2.4 General sewer plans A general sewer plan is defined in WAC 173-240-020(7)as"a comprehensive plan for a stem of sewers adopted by a local government entity General sewer plans are equired of any governmental entity prior to providing sewer service, are considered as plans"within the requirements of Chapter 90.48 RCW, and must be submitted to Ecology for review and approval. A further description of the required contents of a general sewer plan is contained in WAC 173-240-050. A detailed description of the requirements for and contents of a general sewer plan and the approval process is contained in G1-3 General sewer plans should include the general location and description of treatment and disposal facilities, trunk and interceptor sewers, pumping stations, monitoring and control facilities, and local service areas, and a general description of the collection system to serve those areas. The plan should also include preliminary engineering in sufficient detail to ensure technical feasibility, provide for the method of distributing the cost and expense of the sewer system, and indicate the financial feasibility of the plan implementation The basic requirement for a general sewer plan is that it shall be sufficiently complete so hat an engineering report/facility plan can be developed from it without substantial alterations of concept and basic considerations
G1-12 December 1998 Criteria for Sewage Works Design G1-2.3 Growth Management Act Comprehensive Plans The GMA was enacted by the 1990 Legislature and codified in Chapter 36.70A RCW. Administrative regulations were adopted by Ecology in 1992 and are contained in Chapter 365-195 WAC. The GMA and its regulations require that counties with specified populations and rates of growth, the cities within those counties, and other counties and the cities within those counties which choose to, must meet all the requirements of the GMA, which includes the development of comprehensive plans. Comprehensive plans must consist of a map or maps and descriptive text covering objectives, principles, and standards used to develop the comprehensive plan. The plan must be internally consistent and contain certain elements that are consistent with a future land use map. The comprehensive plan and any amendments to the plan must be adopted by the local government following a public participation process. One of the required elements of the comprehensive plan, which relates to the planning for and construction of wastewater collection and treatment facilities, is the capital facilities plan element. The capital facilities plan element must meet the requirements of RCW 36.70A.070 (3) and WAC 365-195-315. These requirements include: • An inventory of existing capital facilities (which includes sanitary sewer systems) owned by public entities, including the locations and capacities of these facilities. • A forecast of the future needs for the capital facilities. • The proposed locations and capacities of expanded or new capital facilities. • At least a six-year plan that will finance the capital facilities. • A requirement to reassess the land use element if the probable funding falls short. G1-2.4 General Sewer Plans A general sewer plan is defined in WAC 173-240-020(7) as “a comprehensive plan for a system of sewers adopted by a local government entity.” General sewer plans are required of any governmental entity prior to providing sewer service, are considered as “plans” within the requirements of Chapter 90.48 RCW, and must be submitted to Ecology for review and approval. A further description of the required contents of a general sewer plan is contained in WAC 173-240-050. A detailed description of the requirements for and contents of a general sewer plan and the approval process is contained in G1-3. General sewer plans should include the general location and description of treatment and disposal facilities, trunk and interceptor sewers, pumping stations, monitoring and control facilities, and local service areas, and a general description of the collection system to serve those areas. The plan should also include preliminary engineering in sufficient detail to ensure technical feasibility, provide for the method of distributing the cost and expense of the sewer system, and indicate the financial feasibility of the plan implementation. The basic requirement for a general sewer plan is that it shall be sufficiently complete so that an engineering report/facility plan can be developed from it without substantial alterations of concept and basic considerations
GeneralEngineering Requirements december 1998 G1-13 G1-2. 5 Project Specific Planning, Design, and Construction This section summarizes the process involved once a site-specific project is selected from the general sewer plan. See Gl-4 for detailed information on project specific planning, design. and construction G1-2.5.1 Engineering Reports/Facility Plans An engineering report/facility plan is defined in WAC 173-240-020(6)as"a document which thoroughly examines the engineering and administrative aspects of a particular domestic or industrial wastewater facility. A facility plan " is an engineering report that includes the additional elements required by the National Environmental Policy Act, other federal statutes, and planning requirements for the State Revolving Fund loan program To be eligible for funding assistance through Ecology's water quality program for specific project planning, design, or construction, the engineering report for the project must meet the additional requirements for a facility plan A further description of the requirements of an engineering report is contained contents of an engineering report and the approval process is contained Gl-4.1 Engineering reports must be sufficiently complete so that plans and specifications can be developed from it without substantial changes G1-2.5.2 Plans and Specifications Plans and specifications are defined in WAC 173-240-020(1 1)as"the detailed drawings and specifications used in the construction or modification of the detailed construction documents by which the owner or their contractor a domestic or industrial wastewater facilities. The plans and specifications bids and constructs the facility. Plans and specifications are to be submitted for Plans and specifications are further described in WAC 173-240-070, and a detailed description of what must be included in the plans and specifications and the approval process is contained in G1-42 G1-2.5.3 Construction Quality Assurance Plans A construction quality assurance plan is defined in WAC 173-240-020(2)as"a plan describing the methods by which the professional engineer in responsible charge of inspection of the project will determine that the facilities were constructed without significant change from the department-approved plans and specifications Construction quality assurance plans must be submitted to Ecology prior construction and demonstrate how adequate and competent construction will be provided. The specific requirements for, and a description of what should be included in these plans, is contained in WAC 173-240-075. A detailed discussion on construction quality assurance plans is contained in G1-43
General Engineering Requirements December 1998 G1-13 G1-2.5 Project Specific Planning, Design, and Construction This section summarizes the process involved once a site-specific project is selected from the general sewer plan. See G1-4 for detailed information on project specific planning, design, and construction. G1-2.5.1 Engineering Reports/Facility Plans An engineering report/facility plan is defined in WAC 173-240-020(6) as “a document which thoroughly examines the engineering and administrative aspects of a particular domestic or industrial wastewater facility.” A “facility plan” is an engineering report that includes the additional elements required by the National Environmental Policy Act, other federal statutes, and planning requirements for the State Revolving Fund loan program. To be eligible for funding assistance through Ecology’s water quality program for specific project planning, design, or construction, the engineering report for the project must meet the additional requirements for a facility plan. A further description of the requirements of an engineering report is contained in WAC 173-240-060. A detailed description of the requirements for and contents of an engineering report and the approval process is contained in G1-4.1. Engineering reports must be sufficiently complete so that plans and specifications can be developed from it without substantial changes. G1-2.5.2 Plans and Specifications Plans and specifications are defined in WAC 173-240-020(11) as “the detailed drawings and specifications used in the construction or modification of domestic or industrial wastewater facilities.” The plans and specifications are the detailed construction documents by which the owner or their contractor bids and constructs the facility. Plans and specifications are to be submitted for approval after an engineering report is approved. Plans and specifications are further described in WAC 173-240-070, and a detailed description of what must be included in the plans and specifications and the approval process is contained in G1-4.2. G1-2.5.3 Construction Quality Assurance Plans A construction quality assurance plan is defined in WAC 173-240-020(2) as “a plan describing the methods by which the professional engineer in responsible charge of inspection of the project will determine that the facilities were constructed without significant change from the department-approved plans and specifications.” Construction quality assurance plans must be submitted to Ecology prior to construction and demonstrate how adequate and competent construction will be provided. The specific requirements for, and a description of what should be included in these plans, is contained in WAC 173-240-075. A detailed discussion on construction quality assurance plans is contained in G1-4.3