Alexandria, Virginia · General provision

Article XIII, Sections 13-107 through 13-118

All Alexandria districts0

Dimensional standards

Servicing

Applies near: Chesapeake Bay Preservation Area
Geographic extent: Chesapeake Bay Preservation Area (CBPA), including Resource Protection Areas (RPAs) and Resource Management Areas (RMAs)

Extracted standards

171 individual requirements pulled out of this section’s prose, each with the sentence it came from.

Other

CBPA alternative equivalency allowed
When the requirements of subsections (4) and (5) have otherwise been met, the requirement to treat the entire Alexandria water quality volume default in subsection (6) may be achieved in accordance with alternative stormwater management equivalency options presented in section 13-110.
CBPA channel protection required
Concentrated stormwater flow shall be released into a stormwater conveyance system and shall meet the criteria of this section, where applicable, from the point of discharge to a point within the limits of analysis in subsection (d).
CBPA commencement approval required
No development, redevelopment, uses, or land disturbing activities may commence until the director of T&ES has approved the final site plan and a state construction general permit has been issued based on approval of a complete and accurate registration statement signed and submitted by the operator, if such registration statement is required.
CBPA design storm and hydrologic methods required
all such land-disturbing activities shall be subject to the design storm and hydrologic methods set out in 9VAC25-875-620, linear development controls in 9VAC25-875-640, and criteria associated with stormwater impoundment structures in 9VAC25-875-650.
CBPA detention waiver allowed
The director of T&ES may waive the requirements provided in subsection (2) in cases where stormwater detention would conflict with the city's flood management programs.
CBPA development review less than acre exemption
any land-disturbing activity less than one acre within the CBPA shall not be required to complete a registration statement for coverage under the general permit, but shall be subject to all aspects of the development review process
CBPA development review required
Any development, redevelopment, or use exceeding 2,500 square feet of land disturbance within the CBPA shall be subject to the development review process outlined in subsection (C) below prior to any clearing of the site, or the issuance of any building, land use, or land development permit.
CBPA dewatering discharges prohibited
Discharges from dewatering activities, including discharges from dewatering of trenches or excavations, are prohibited unless managed by appropriate controls.
CBPA discharge easement required
Post-development concentrated surface waters shall not be discharged on adjoining property, unless an easement expressly authorizing such discharge has been granted by the owner of the affected land.
CBPA erosion and sediment control compliance required
The proposed development or redevelopment shall comply with section 5-4-1 et seq. of the City Code (erosion and sediment control).
CBPA final plan approval required
Approval by the director of T&ES of all requirements as outlined in subsection (C) above
CBPA final plan BMP inspection schedule required
A BMP inspection schedule and maintenance agreement between the city and applicant as deemed necessary and appropriate by the director of T&ES to ensure proper maintenance of best management practices in order to assure their continued performance.
CBPA final plan compliance demonstration required
Demonstration to the satisfaction of the director of T&ES, through the review of the final site plan application and attendant materials and supporting documentation, that all land clearing, construction, disturbance, land development, and drainage will be done in accordance with this Article XIII.
CBPA final plan fees required
Payment of all applicable fees in accordance with section 113-104(D)
CBPA final plan maintenance agreement required
Review of a signed standard maintenance and monitoring agreement for the long-term maintenance of stormwater BMPs, and proof of recordation per section 13-109(G).
CBPA final plan VPDES permit required
Evidence that a general VPDES permit for discharges of stormwater from construction activities has been issued, if such general permit is required
CBPA final plan wetlands permits required
A copy showing issuance of all wetlands permits required by law
CBPA flood protection required
Concentrated stormwater flow shall be released into a stormwater conveyance system and shall meet one of the following criteria as demonstrated by the use of acceptable hydrologic and hydraulic methodologies
CBPA impervious cover minimization required
Development or redevelopment shall minimize impervious cover consistent with the proposed use or development.
CBPA indigenous vegetation preservation required
Indigenous vegetation shall be preserved to the maximum extent practicable consistent with the use, development, or redevelopment proposed.
CBPA intermittent stream protection required
Measures must be taken to protect these features from direct stormwater runoff from impervious surfaces and to preserve their water quality functions.
CBPA isolated wetland waiver allowed
The director of T&ES may waive the requirements of (b) above if the non-tidal wetland is demonstrated to the director of T&ES's satisfaction that it qualifies as an isolated wetland of minimal ecological value defined in section 13-103(K).
CBPA minimum disturbance required
No more land shall be disturbed than is necessary to provide for the proposed use, development, or redevelopment.
CBPA off-site compliance allowed
Compliance with subsections (4) and (5) may be achieved by the applicant in accordance with off-site compliance options in 9VAC25-875-610
CBPA plan of development environmental site assessment required
An environmental site assessment as detailed in section 13-112
CBPA plan of development erosion control plan required
An erosion and sediment control plan in accordance with the provisions of Chapter 4, Title 5 of the City Code
CBPA plan of development landscape plan required
A landscape plan in accordance with the provisions of section 113-117(D)(3) of this ordinance certified by qualified design professionals practicing within their areas of competence
CBPA plan of development required
The development review process application shall consist of the plans and studies identified below, such application forms as the director of T&ES shall require and the appropriate fees, which together shall constitute the plan of development.
CBPA plan of development site plan required
A site plan in accordance with the provisions of section 11-400 of this ordinance or other applicable law and, if applicable, a subdivision plat in accordance with the provisions of Chapter 5, Title 7 of the City Code
CBPA plan of development stormwater plan required
A stormwater management plan as detailed in section 13-114 and approved in accordance with section 13-115
CBPA plan of development SWPPP checklist required
Completion of the stormwater pollution prevention plan checklist referring to standard plan language included in the final plan
CBPA plan of development WQIA required
For all land disturbance, development, or redevelopment within an RPA, or within an environmentally sensitive area as determined by the director of T&ES pursuant to section 13-117(C) or section 13-117(D), or for an exception under section 13-119, a water quality impact assessment as detailed in section 13-117.
CBPA pollution prevention material exposure minimization required
Minimize the exposure of building materials, building products, construction wastes, trash, landscape materials, fertilizers, pesticides, herbicides, detergents, sanitary waste, and other materials present on the site to precipitation and to stormwater
CBPA pollution prevention plan required
The pollution prevention plan is required by 9VAC25-875-500 and shall be developed, implemented, and updated as necessary, and must detail the design, installation, implementation, and maintenance of effective pollution prevention measures to minimize the discharge of pollutants.
CBPA pollution prevention spill response required
Minimize the discharge of pollutants from spills and leaks and implement chemical spill and leak prevention and response procedures.
CBPA pollution prevention wash water treatment required
Wash waters must be treated in a sediment basin or alternative control that provides equivalent or better treatment prior to discharge
CBPA pre-development runoff good condition required
For the purposes of computing pre-development runoff, all pervious lands on the site shall be assumed to be in good hydrologic condition in accordance with the U.S. Department of Agriculture's Natural Resources Conservation Service (NRCS) standards, regardless of conditions existing at the time of computation.
CBPA prohibited discharges concrete washout
Wastewater from washout of concrete, unless managed by an appropriate control
CBPA prohibited discharges construction materials
Wastewater from washout and cleanout of stucco, paint, form release oils, curing compounds, and other construction materials
CBPA prohibited discharges fuels oils
Fuels, oils, or other pollutants used in vehicle and equipment operation and maintenance
CBPA prohibited discharges soaps solvents
Soaps or solvents used in vehicle and equipment washing.
CBPA RPA review no threshold
all development, redevelopment, or use in the RPA, or in the vegetated area established under subsection 13-109(E)(11), regardless of the amount of land disturbance, shall be subject to the review
CBPA runoff reduction method required
Compliance with subsections (4) and (5) above shall be determined using the runoff reduction method and through the use of stormwater BMPs established in 9VAC25-875-590 or found at the Virginia BMP Clearinghouse website
CBPA runoff verification required
Pre-development and post-development runoff characteristics and site hydrology shall be verified by site inspections, topographic surveys, available soil mapping or studies, and calculations consistent with good engineering practices.
CBPA sheet flow impact evaluation required
Increased volumes of sheet flow resulting from pervious or disconnected impervious areas, or from physical spreading of concentrated flow through level spreaders, must be identified and evaluated for potential impacts on down-gradient properties or resources.
CBPA single-unit home registration exemption
any detached single-unit home construction within or outside of a common plan of development or sale that is not otherwise exempt shall not be required to complete a registration statement, but shall adhere to all other requirements of the general permit and all applicable requirements of this article.
CBPA single-unit residence exemption
Single-unit residences separately built and disturbing less than one acre and not part of a larger common plan of development or sale, including additions or modifications to existing single-unit detached residential structures are exempt from subsections (4) and (5) below.
CBPA site area definition disturbance percentage50 pct
for projects disturbing less than 50 percent of the tax parcel (or if multiple parcels are involved, the land subject to the application), the disturbed area shall be used as the site area; for projects disturbing greater than or equal to 50 percent of the tax parcel (or if multiple parcels are involved, the land subject to the application), the entire tax parcel shall be used as the site area.
CBPA stormwater facility maintenance responsibility
It shall be the responsibility of the owner of any stormwater quality or quantity management facility established to meet the requirements of (E) and (F) above to provide adequate maintenance for proper functioning of the system.
CBPA stormwater plan amendment required
The director of T&ES may require that an approved stormwater management plan be amended, within a time prescribed by the director of T&ES, to address any deficiencies noted during inspection.
CBPA stormwater plan as-built required
An as-built drawing for permanent stormwater management facilities shall be submitted to the director of T&ES in accordance with section 13-114.
CBPA stormwater plan as-built waiver allowed
The director of T&ES may elect not to require as-built drawings for stormwater management facilities for which recorded maintenance agreements are not required.
CBPA stormwater plan common plan rule
Individual lots in a new residential, commercial, or industrial development or sale, including those developed under subsequent owners, shall not be considered separate land-disturbing activities. Instead, the common plan, as a whole, shall be considered to be a single land-disturbing activity.
CBPA stormwater plan completeness days15 days
The director of T&ES shall determine the completeness of the plan in accordance with section 13-114 and shall notify the applicant, in writing, of such determination within 15 calendar days of receipt.
CBPA stormwater plan content required
The plan shall contain maps, charts, graphs, tables, photographs, narrative descriptions, explanations, calculations, and citations to supporting references as appropriate to communicate the information required by this Article XIII.
CBPA stormwater plan deemed approval
If a plan meeting all requirements of this article is submitted and no action is taken within the time frame provided in this subsection, the plan will be deemed approved.
CBPA stormwater plan entire site required
The stormwater management plan must apply the stormwater technical requirements of section 13-109 to the entire site.
CBPA stormwater plan equivalency narrative required
If the operator intends to utilize the alternative stormwater management equivalency options in section 13-110 to meet the Alexandria water quality volume default in section 13-109(E)(6) or the additional water quality performance criteria of section 13-109(E)(8), then the operator must submit a narrative and any required calculations.
CBPA stormwater plan maintenance schedule required
The plan shall establish a long-term schedule for inspection and maintenance of stormwater management facilities that includes all maintenance requirements and persons responsible for performing maintenance.
CBPA stormwater plan modification required
Modifications to an approved stormwater management plan shall be allowed only after review and written approval by the director of T&ES.
CBPA stormwater plan modification review days60 days
The director of T&ES shall have 60 calendar days to respond in writing either approving or disapproving such request.
CBPA stormwater plan off-site credits letter required
If an operator intends to meet the water quality requirements set forth in section 13-109(E) through the use of off-site credits in accordance with section 13-109(E)(8), then a letter of availability from the off-site provider must be included.
CBPA stormwater plan PE seal required
All stormwater designs that require analysis of pressure hydraulic systems and/or inclusion and design of flow control structures must be sealed by a professional engineer registered in the Commonwealth of Virginia.
CBPA stormwater plan phased design required
Site specific facilities for phased projects shall be designed for the ultimate development of the contributing project watershed based on zoning, comprehensive plans, local public facility master plans, or other similar planning documents.
CBPA stormwater plan resubmission review days45 days
The director of T&ES shall review any plan that has been previously disapproved within 45 calendar days of the date of re-submission.
CBPA stormwater plan review days60 days
The director of T&ES shall have an additional 60 calendar days from the date of the communication of completeness to review the plan
CBPA stormwater plan review required
The director of T&ES shall review stormwater management plans and shall approve or disapprove a stormwater management plan in accordance with the following
CBPA stormwater plan seal required
Elements of stormwater management plans that include activities regulated under Chapter 4 of Title 54.1 of the Code of Virginia be appropriately sealed and signed by professional registered in the Commonwealth of Virginia and performed in accordance with procedures, consistent with good engineering practice, established by the director of T&ES pursuant to section 13-104(C).
CBPA stormwater quality threshold2,500 sqft
All development, redevelopment, and uses disturbing greater than 2,500 square feet shall meet the following storm water quality management performance requirements.
CBPA SWPPP amendment required
The SWPPP shall be amended by the operator whenever there is a change in design, construction, operation, or maintenance that has a significant effect on the discharge of pollutants to state waters that is not addressed in the existing SWPPP.
CBPA SWPPP content required
The stormwater pollution prevention plan (SWPPP) shall include the content specified in 9VAC25-875-500, which includes but is not limited to, an approved erosion and sediment control plan, an approved stormwater management plan, a pollution prevention plan for regulated land-disturbing activities, and a description of any additional control measures necessary to address a TMDL.
CBPA SWPPP on-site maintenance required
The SWPPP must be maintained by the operator at a central location on-site. If an on-site location is not available, notice of the SWPPP's location must be posted near the main entrance at the construction site.
CBPA SWPPP public review required
Operators shall make the SWPPP available for public review in accordance with Section II of the general permit, either electronically or in hard copy.
CBPA SWPPP required
any development, redevelopment, or land-disturbing activity of one acre or greater must develop prior to the land-disturbing activity, implement, and keep at the site for inspection a stormwater pollution prevention plan that meets the requirements set forth in section 13-113
CBPA vegetated area alternative BMP allowed
The BMP requirement in (b) above may alternatively be met through the use of a smaller vegetated area in combination with equivalent on-site stormwater treatment and/or equivalent off-site options presented in section 13-110 if approved by the director of T&ES.
CBPA vegetated area BMP width50 ft
A 50-foot wide vegetated area preserved where present, or established where not present, on the outward edge of these features shall be considered a sufficient BMP to meet this standard if the vegetated area is designed to prevent erosion and scouring.
CBPA vegetated area use restriction
Development, redevelopment, uses, and land-disturbing activities allowed in the vegetated area shall be the same as those allowed in RPAs as described in section 13-107.
CBPA water quality improvement fund established
The city hereby establishes a dedicated fund known as the Alexandria water quality improvement fund to be used in conjunction with this Article XIII
CBPA water quality volume default treatment required
For new development and development on prior developed lands in subsections (4) and (5) above, the entire Alexandria water quality volume default from the site shall be treated, or the requirements must be met consistent with section 13-110.
CBPA WQIA approval required
For any water quality impact assessment to proceed, the director of T&ES must first approve it for completeness and compliance with this Article XIII.
CBPA WQIA certification required
A water quality minor impact assessment shall be certified as complete and accurate by a professional engineer or a certified land surveyor.
CBPA WQIA department review days90 days
Any comments by the department will be incorporated into the final review by the director of T&ES provided that such comments are provided by the department within 90 days of the request.
CBPA WQIA major criteria
Within any RPA, the proposed development is water-dependent or constitutes redevelopment; The disturbance of wetlands shall comply with state and federal regulations; The development will not result in significant disruption of the hydrology of the site; The development will not result in significant degradation of water quality that could adversely affect aquatic vegetation or life; The development will not result in unnecessary destruction of plant material on site; Proposed erosion and sediment control measures are adequate to achieve the required reductions in runoff, and prevent off-site transport of sediment during and after construction; Proposed stormwater management measures are adequate to control the stormwater runoff to achieve the required standard for pollutant control; Proposed revegetation of disturbed areas will provide adequate erosion and sediment control benefits, as determined by the director of T&ES.
CBPA WQIA major threshold5,000 sqft
A water quality major impact assessment is required for development or redevelopment within RPAs or under an exception that involves more than 5,000 square feet of land disturbance
CBPA WQIA minor criteria
The necessity of the proposed encroachment and the ability to place improvements elsewhere on the site to avoid disturbance of the buffer area; Impervious surface is minimized; Proposed BMPs, where required achieve the requisite reductions in pollutant loadings; The development, as proposed, meets the purpose and intent of these regulations; The cumulative impact of the proposed development when considered in relation to other development within the RPA in the vicinity, both existing and proposed, will not result in a significant degradation of water quality.
CBPA WQIA minor nutrient removal40 pct
and 40 percent of nutrients from post-development stormwater runoff
CBPA WQIA minor sediment removal75 pct
A minor assessment must demonstrate that the undisturbed buffer area, enhanced vegetative plantings, and any required BMPs will result in the removal of no less than 75 percent of sediments
CBPA WQIA minor threshold5,000 sqft
A water quality minor impact assessment is required for development or redevelopment within RPAs or under an exception which involves 5,000 or less square feet of land disturbance
CBPA WQIA required
A water quality impact assessment is required for any proposed development or redevelopment in the RPA
Channel protection improvement factor0.8 ratio
I.F (Improvement Factor) equals 0.8 for sites > 1 acre or 0.9 for sites ≤ 1 acre.
Channel protection improvement factor for small sites0.9 ratio
I.F (Improvement Factor) equals 0.8 for sites > 1 acre or 0.9 for sites ≤ 1 acre.
Channel protection design storm1 year
the maximum peak flow rate from the one-year 24-hour storm following the land-disturbing activity shall be calculated
Development review threshold2,500 sqft
Any development, redevelopment, or use exceeding 2,500 square feet of land disturbance within the CBPA shall be subject to the development review process
Dewatering discharges prohibited
Discharges from dewatering activities, including discharges from dewatering of trenches or excavations, are prohibited unless managed by appropriate controls.
Discharge to adjoining property prohibited
Post-development concentrated surface waters shall not be discharged on adjoining property, unless an easement expressly authorizing such discharge has been granted by the owner of the affected land.
Downstream analysis distance150 ft
A point that is at least 150 feet downstream of a point where the receiving pipe or channel is joined by another that has a drainage area that is at least 90 percent of the size of the first drainage area at the point of confluence
Downstream analysis drainage area360 acres
A point that is at least 150 feet downstream of a point where the drainage area is 360 acres or greater.
Environmental site assessment certification required
Site-specific evaluations or delineations of RPA boundaries shall be certified by a professional engineer, land surveyor, landscape architect, soil scientist, or wetland delineator certified or licensed to practice in the Commonwealth of Virginia.
No RPA elements certification allowed
In the event that no part of the site plan area contains any elements described in subsection (A) or (B) above, the applicant and the party responsible for the evaluation may, in lieu of providing an environmental site assessment plan, so certify the finding, in writing and under oath, to the director of T&ES.
Environmental site assessment required
The environmental site assessment shall clearly delineate the individual components of the RPA as well as the total geographic extent of the RPA as defined in section 13-105(B)
Environmental site assessment scale requirement
The environmental site assessment shall be drawn at the same scale as the preliminary site plan or subdivision plat, and shall be certified as complete and accurate by a professional engineer or a certified land surveyor.
Steep slope threshold for environmental site assessment15 pct
Steep slopes greater than 15 percent in grade
Environmental site assessment waiver threshold5,000 sqft
This requirement may be waived by the director of T&ES when the proposed use or development would result in less than 5,000 square feet of disturbed area.
Wetlands delineation standard
Wetlands delineations shall be performed consistent with current procedures promulgated by the U.S. Army Corps of Engineers and the Environmental Protection Agency.
Final plan BMP inspection schedule required
A BMP inspection schedule and maintenance agreement between the city and applicant as deemed necessary and appropriate by the director of T&ES to ensure proper maintenance of best management practices in order to assure their continued performance.
Final plan wetlands permits required
A copy showing issuance of all wetlands permits required by law
Flood protection design storm10 year
Concentrated stormwater flow shall be released into a stormwater conveyance system and shall meet one of the following criteria as demonstrated by the use of acceptable hydrologic and hydraulic methodologies
Off-site compliance disturbance threshold5 acres
Less than five acres of land will be disturbed
Off-site compliance phosphorus threshold10 lbs/year
The post-construction phosphorus control requirement is less than ten pounds per year
Minimum on-site phosphorus reduction75 pct
At least 75 percent of the required phosphorus nutrient reductions are achieved on-site.
Phosphorus reduction for prior developed lands >= 1 acre20 pct
the total phosphorus load shall be reduced at least 20 percent below the pre-development total phosphorus load.
Phosphorus reduction for prior developed lands < 1 acre10 pct
the total phosphorus load shall be reduced at least ten percent below the predevelopment total phosphorus load.
Material exposure minimization required
Minimize the exposure of building materials, building products, construction wastes, trash, landscape materials, fertilizers, pesticides, herbicides, detergents, sanitary waste, and other materials present on the site to precipitation and to stormwater
Pollution prevention plan required
The pollution prevention plan is required by 9VAC25-875-500 and shall be developed, implemented, and updated as necessary
Spill response required
Minimize the discharge of pollutants from spills and leaks and implement chemical spill and leak prevention and response procedures.
Wash water treatment required
Wash waters must be treated in a sediment basin or alternative control that provides equivalent or better treatment prior to discharge
Pre-development runoff good condition assumption
For the purposes of computing pre-development runoff, all pervious lands on the site shall be assumed to be in good hydrologic condition in accordance with the U.S. Department of Agriculture's Natural Resources Conservation Service (NRCS) standards
Prohibited discharge: concrete washout
Wastewater from washout of concrete, unless managed by an appropriate control
Prohibited discharge: construction materials
Wastewater from washout and cleanout of stucco, paint, form release oils, curing compounds, and other construction materials
Prohibited discharge: fuels and oils
Fuels, oils, or other pollutants used in vehicle and equipment operation and maintenance
Prohibited discharge: soaps and solvents
Soaps or solvents used in vehicle and equipment washing.
RPA buffer dead tree removal allowed
Dead, diseased, or dying trees or shrubbery and noxious weeds (such as Johnson grass, kudzu, and multiflora rose) may be removed and thinning of trees may be conducted.
RPA buffer encroachment approval required
The following encroachments, if permitted in the underlying zone, are allowed to the RPA buffer area if approved by the director of T&ES and provided that a water quality impact assessment is performed and accepted by the director of T&ES as complete in accordance with section 13-117.
RPA buffer encroachment BMP evaluation required
If a stormwater BMP was previously required, the BMP shall be evaluated to determine if it continues to function effectively, and, if necessary, the BMP shall be reestablished or repaired and maintained as required
RPA buffer encroachment legal process required
The lot or parcel was created as a result of a legal process conducted in conformity with the city's subdivision regulations
RPA buffer encroachment minimum required
Encroachments into the buffer area shall be the minimum necessary to achieve a reasonable buildable area for a principal structure and necessary utilities
RPA buffer encroachment mitigation required
Where practicable, a vegetated area that will maximize water quality protection, mitigate the effects of the buffer encroachment, and is equal to the area of encroachment into the buffer area shall be established elsewhere on the lot
RPA buffer encroachment prior conditions required
Any conditions or mitigation measures imposed through previously approved exceptions must be met
RPA buffer encroachment record date 1
When the application of the buffer area would result in the loss of a buildable area on a lot or parcel recorded prior to October 1, 1989
RPA buffer encroachment record date 2
When the application of the buffer area would result in the loss of buildable area on a lot or parcel recorded between October 1, 1989 and March 1, 2002
RPA buffer encroachment seaward limit50 ft
The encroachment may not extend into the seaward 50 feet of the buffer area.
RPA buffer path erosion control required
Any path shall be constructed and surfaced so as to effectively control erosion.
RPA buffer seaward encroachment limit50 ft
The encroachment may not extend into the seaward 50 feet of the buffer area.
RPA buffer stormwater management program consistency required
The facility is consistent with a city stormwater management program approved by the Virginia State Water Control Board.
RPA buffer stream restoration allowed
Stream restoration projects and shoreline erosion control and stabilization projects, including the removal of trees and woody vegetation, employment of necessary restoration, control, and stabilization techniques, and establishment of appropriate vegetation, may be allowed in accordance with the best available technical advice and applicable permit conditions or requirements if approved by the city arborist.
RPA buffer tree removal replacement required
Trees may be pruned or removed as necessary to provide for sight lines and vistas, provided that where removed, they shall be replaced with other vegetation that is equally effective in retarding runoff, preventing erosion, and filtering nonpoint source pollution from runoff.
RPA buffer vegetation removal approval required
existing vegetation may be removed if approved by the director of T&ES and only to provide for reasonable sight lines, access paths, general woodlot management, and best management practices to prevent upland erosion and concentrated flows of stormwater
RPA review no threshold
all development, redevelopment, or use in the RPA, or in the vegetated area established under subsection 13-109(E)(11), regardless of the amount of land disturbance, shall be subject to the review
Sheet flow management required
Increased volumes of sheet flow resulting from pervious or disconnected impervious areas, or from physical spreading of concentrated flow through level spreaders, must be identified and evaluated for potential impacts on down-gradient properties or resources.
Stormwater BMP access required
The owner shall provide the city with access to the facility to perform quality assurance inspections and follow up inspections
Stormwater BMP corrective action period
If inadequate maintenance is observed by the city, the owner will be notified and an adequate period specified for corrective action.
Stormwater BMP inspection frequency5 years
The owner shall provide the city with access to the facility to perform quality assurance inspections and follow up inspections to ensure adequate maintenance has been conducted a minimum of once every five years
Stormwater BMP maintenance agreement recordation required
The BMP maintenance agreement shall be set forth in an instrument recorded in the city land records.
Stormwater BMP maintenance agreement required
The owner shall enter into a stormwater BMP maintenance agreement (agreement) with the city that provides all necessary provisions to ensure compliance with this article, to include access for inspections.
Stormwater BMP maintenance report required
The owner shall prepare and submit inspection and maintenance reports to the city in accordance with city policies and procedures for the specific facility.
Stormwater BMP sanctions
In cases of repeated instances of failure to perform required maintenance, sanctions may be imposed as provided in section 13-126.
Deemed approval of stormwater plan
If a plan meeting all requirements of this article is submitted and no action is taken within the time frame provided in this subsection, the plan will be deemed approved.
As-built drawings required
An as-built drawing for permanent stormwater management facilities shall be submitted to the director of T&ES in accordance with section 13-114.
Common plan rule
Individual lots in a new residential, commercial, or industrial development or sale, including those developed under subsequent owners, shall not be considered separate land-disturbing activities. Instead, the common plan, as a whole, shall be considered to be a single land-disturbing activity.
Maintenance schedule required
The plan shall establish a long-term schedule for inspection and maintenance of stormwater management facilities that includes all maintenance requirements and persons responsible for performing maintenance.
Stormwater plan modification required
Modifications to an approved stormwater management plan shall be allowed only after review and written approval by the director of T&ES.
Stormwater management plan required
The stormwater management plan must apply the stormwater technical requirements of section 13-109 to the entire site.
Stormwater management plan seal required
Elements of stormwater management plans that include activities regulated under Chapter 4 of Title 54.1 of the Code of Virginia be appropriately sealed and signed by professional registered in the Commonwealth of Virginia
Stormwater plan completeness determination period15 days
The director of T&ES shall determine the completeness of the plan in accordance with section 13-114 and shall notify the applicant, in writing, of such determination within 15 calendar days of receipt.
Stormwater plan modification review period60 days
The director of T&ES shall have 60 calendar days to respond in writing either approving or disapproving such request.
Stormwater plan resubmission review period45 days
The director of T&ES shall review any plan that has been previously disapproved within 45 calendar days of the date of re-submission.
Stormwater plan review period60 days
The director of T&ES shall have an additional 60 calendar days from the date of the communication of completeness to review the plan
Stormwater pollution prevention plan threshold43,560 sqft
any development, redevelopment, or land-disturbing activity of one acre or greater must develop prior to the land-disturbing activity, implement, and keep at the site for inspection a stormwater pollution prevention plan
Vegetated buffer width for intermittent streams/non-tidal wetlands50 ft
A 50-foot wide vegetated area preserved where present, or established where not present, on the outward edge of these features shall be considered a sufficient BMP to meet this standard
Water quality impact assessment approval required
For any water quality impact assessment to proceed, the director of T&ES must first approve it for completeness and compliance with this Article XIII.
Water quality impact assessment certification required
A water quality minor impact assessment shall be certified as complete and accurate by a professional engineer or a certified land surveyor.
Department review period for major impact assessment90 days
Any comments by the department will be incorporated into the final review by the director of T&ES provided that such comments are provided by the department within 90 days of the request.
Major impact assessment approval criteria
Within any RPA, the proposed development is water-dependent or constitutes redevelopment; The disturbance of wetlands shall comply with state and federal regulations; The development will not result in significant disruption of the hydrology of the site; The development will not result in significant degradation of water quality that could adversely affect aquatic vegetation or life; The development will not result in unnecessary destruction of plant material on site; Proposed erosion and sediment control measures are adequate to achieve the required reductions in runoff, and prevent off-site transport of sediment during and after construction; Proposed stormwater management measures are adequate to control the stormwater runoff to achieve the required standard for pollutant control; Proposed revegetation of disturbed areas will provide adequate erosion and sediment control benefits, as determined by the director of T&ES.
Water quality major impact assessment threshold5,000 sqft
A water quality major impact assessment is required for development or redevelopment within RPAs or under an exception that involves more than 5,000 square feet of land disturbance
Minor impact assessment approval criteria
The necessity of the proposed encroachment and the ability to place improvements elsewhere on the site to avoid disturbance of the buffer area; Impervious surface is minimized; Proposed BMPs, where required achieve the requisite reductions in pollutant loadings; The development, as proposed, meets the purpose and intent of these regulations; The cumulative impact of the proposed development when considered in relation to other development within the RPA in the vicinity, both existing and proposed, will not result in a significant degradation of water quality.
Water quality minor impact assessment threshold5,000 sqft
A water quality minor impact assessment is required for development or redevelopment within RPAs or under an exception which involves 5,000 or less square feet of land disturbance
Water quality impact assessment required
A water quality impact assessment is required for any proposed development or redevelopment in the RPA
Water quality improvement fund established
The city hereby establishes a dedicated fund known as the Alexandria water quality improvement fund
Water quality minor nutrient removal40 pct
and 40 percent of nutrients from post-development stormwater runoff
Water quality minor sediment removal75 pct
A minor assessment must demonstrate that the undisturbed buffer area, enhanced vegetative plantings, and any required BMPs will result in the removal of no less than 75 percent of sediments
Water quality volume treatment100 pct
The entire water quality volume from the site shall be treated.

From the ordinance

Development, redevelopment, and uses authorized by the underlying zone are permitted in the RMA provided such activity is carried out in accordance with all applicable criteria in this Article XIII.
Article XIII, Sections 13-107 through 13-118