HomeMy WebLinkAboutWPO201400059 Review Comments 2014-06-12Review Comments
Project Name: Briarwood Commercial Lots - Gas Station Erosion and Sediment Control Plan
Date Completed: 1wednesday, September 03, 2014
Reviewer: Ana Kilmer
Department /Division /Agency: CommDev- Central Ops
Reviews
8/25/2014 - swa was submitted and forwarded to CAO
8/25/2014 - swa approved by CAO
8/28/2014 - swa signed by county executive
9/3/2014 - swa recorded in deed book 4531, page 257
Review Status: Approved
Review Comments
Project Name: Briarwood Commercial Lots - Gas Station Erosion and Sediment Control Plan
Date Completed: IThursday, August 21, 2014
Reviewer: John Anderson
Department /Division /Agency: Engineering
Reviews
bond estimate complete 8/19/14
Review Status: See Recommendations
�pF A
�'717G1L31P
COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902 -4596
Phone (434) 296 -5832 Fax (434) 972 -4126
Project:
Briarwood — Gas Station WPO
Plan preparer:
Scott Collins; Collins Engineering [200 Garrett St., Suite K, Charlottesville, VA
22902, scott@collins- engineering com]
Owner or rep.:
Wendell Wood and Nena Harrell [ulcwww @embarqmail.com]
Woodbriar Associates [P. O. Box 5548, Charlottesville, VA 22905]
Plan received date:
13 June 2014
(Rev. 1):
24 July 2014
(Rev. 2)
8 August 2014
Date of comments:
14 July, 2014
(Rev. 1):
4 August 2014
(Rev. 2)
18 August 2014
Reviewer:
John Anderson
Comments from previous revisions have been removed to help simplify this memo. They are still available for
viewing on the CountyView database system.
A. VSMP: SWPPP and Pollution Prevention Plan (WP0201400059)
(The Virginia stormwater management program, stormwater pollution prevention plan application and
documents)
1. (4 Aug -14 comment New #1, SWM Plan)
With respect to SWPPP dated 7/20/14 prepared by Collins Engineering for construction activities at
Briarwood Commercial Lots, received 7/24/14:
- Registration Statement (General VPDES Permit) latitude /longitude do not match SWPP project
coordinates; please reconcile. (Rev. 2) Comment addressed.
- Estimate start- finish / installation- removal dates throughout the SWPPP. (Rev. 2) Comment addressed.
- Revise inspection schedule (p. 26). Inspections are required at least once every 10 business days (plus
additional requirements). [Ref. 9VAC25- 880 -70, Part II, Stormwater Pollution Prevention Plan, F.,
Inspections, 2., Inspection Schedule] (Rev. 2) Comment addressed.
- SWPPP, p. 26, identifies one individual responsible for inspection. Confirm that this individual accepts
sole responsibility for scheduled inspections, reporting, recordkeeping, notification, and for directing
corrective response relating to SWPPP proposed to cover all Briarwood Commercial projects. (Rev. 2)
Comment addressed; also, email, FGM to JEA, Wed 8/6/2014 3:52 PM.
- EXHIBrr TO SHOW CONCRETE WASH OUT, PORTA- JOHNS, AND FUELING AREA (7/21/14): Show concrete wash
out area (not shown). Concrete wash out area/s may not drain to storm inlets. Propose treatment for concrete
wash waters. [§ 17- 404.B.] (Rev. 2) Comment addressed.
- Show on -site dumpster. Provide treatment (or detention) of dumpster drain water. Dumpster runoff may
contain contaminants that may not discharge freely downslope, to a storm inlet, or to any stream. Provide silt
fence or earthen berm at porta johns as containment in event of spill. Furnish impermeable containment, a
barrier to infiltration designed to hold the entire volume of stored fuel in event of spill, with freeboard measure
of safety, for each fueling tank shown in the SWPP exhibit. (Rev. 2) Comment addressed.
- 17- 404.B. La. Wash waters — "Minimize the discharge of pollutants from equipment and vehicle washing,
wheel wash water, and other wash waters. Wash waters must be treated in a sediment basin or alternative
Engineering Review Comments
Page 2 of 2
control that provides equivalent or better treatment prior to discharge." Propose treatment for wash water.
(Rev. 2) Comment addressed —Wash areas drain to trap or basin.
Construction entrance with wash rack to the north does not drain to a sediment basin; propose treatment.
(Rev. 2) Comment addressed.
Label construction entrance on plan sheets as Paved CE, with wash rack [ref. WP0201300072, E &S
Sequence of Construction Note 3]. Provide detail found at p. 27 of ACDSM —link:
http : / /www.albemarle.org/departrnent .asp ?department= cdd &relpage =4447 (Rev. 2) Comment addressed.
Transfer SWPPP best management practices to project plan sheets: practices or narrative listed /shown in
SWPPP and on WPO plans should mirror each other. (Rev. 2) Comment withdrawn —not necessary in this
instance. See SWPPP dated 8/6/2014 for details re SWPPP fuel spill containment, concrete washout, porta-
John, and paved construction entrance details.
Revise SWPPP, SWPPP plan sheets, and corresponding WPO plan sheets. (Rev. 2) Comment addressed
— bullet above.
VSMP SWPPP and Pollution Prevention Plan approved. [REF. SWPPP 08/06/2014]
B. VSMP: SWPPP: Stormwater Management Plan (WP0201400059)
Comments from previous revisions have been removed to help simplify this memo. They are still available for
viewing on the CountyView database system.
(4 Aug -14 comment New #2, SWM Plan)
Furnish letter of coverage, VDEQ General VPDES Permit. (Rev. 2) Comment addressed / Nena
Harrell to GEB /JEA email: Tue 8/12/2014 9:27 AM; Mark Graham to JEA email: Wed 8/13/2014 7:07
PM. Sara Moore, DEQ EMAIL: Tuesday, August 12, 2014 9:03 AM
VSMP SWM plan approved.
Permit coverage under the old 2009 permit remains in effect until you receive coverage under the new 2014
permit. Once you receive your 2014 coverage letter you will be operating under the new 2014 permit see
9VAC25- 880 -30.H of the 2014 construction general permit regulation - coverage under the old 2009
construction eg neral permit is administratively continued [i.e., remains in effect] for operators that
submitted a complete reissuance registration statement).
Also: "The project for Briarwood is under number VAR107199 — your coverage under 2009 permit remains
in effect until such time as we [DEQ] issue the 2014 permit.
-Sarah Moore"
[August 12, 2014 9:03 AM; partial text; EMAIL: Sarah Moore, VDEQ, to Nena Harrell, Applicant/Owner]
C. VSMP: SWPPP: Erosion and Sediment Control Plan (WP0201400059)
Comments from previous revisions have been removed to help simplify this memo. They are still available for
viewing on the CountyView database system.
VSMP ESC Plan approved.
File: WP0201400059- briarwood -gas station- 081814rev -2
�pF A
�'717G1L31P
COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902 -4596
Phone (434) 296 -5832 Fax (434) 972 -4126
Project: Briarwood — Gas Station WPO
Plan preparer: Scott Collins; Collins Engineering [200 Garrett St., Suite K, Charlottesville, VA
22902, scott@collins- engineering com]
Owner or rep.: Wendell Wood and Nena Harrell [ulcwww @embarqmail.com]
Woodbriar Associates [P. O. Box 5548, Charlottesville, VA 22905]
Plan received date: 13 June 2014
(Rev. 1): 24 July 2014
Date of comments: 14 July, 2014
(Rev. 1): 4 August 2014 —Ref. 1./7., below
Reviewer: John Anderson
Stormwater Management Plan (WP0201400059)
1. Comment applies to WP0201400059 [site], WP0201400030 [underground storage amendment],
WP0201300072 [road plan WPO]): Furnish print or e -copy of state - issued Virginia Stormwater
Management Program VPDES (General) Permit for Briarwood development. WPO technical review
criteria depend upon General Permit status. We are in receipt of email explaining that project has VPDES
permit; based upon Jul -8 email assurance, it is assumed that technical criteria listed at 9VAC25- 870- 93/ -99
(Part 11 C) apply, but criteria listed at 9VAC25- 870- 62/ -92 (Part II B) may apply, depending upon permit
status. Further review and comment are contingent upon receipt of copy of VPDES GP. We have
requested information of VDEQ as well. (Rev. 1) Comment acknowledged: "previously approved DEQ
permit will be provided upon receipt of it" — Applicant response, 22- Jul -14. VSMP approval or approval of
grading /land disturbance (18- 32.4.2.8.c.; 18- 8.5.5.4) are contingent upon receipt of copy of DEQ VPDES
General permit covering activities associated with road, gas station, and underground detention
construction. Please reference Code Sec. 17 -417, B.
2. As follow -up to conversation 25 -June, revised design will include 3.0" (min) DIA low -flow orifice at low
point of 10' -DIA underground detention system. With this change, other system dimensions may change.
SCS routing results may change. Please revise design, and provide revised routing calculations. Also,
outfall control structure 1 should be modeled as an orifice with area equivalent to the circle segment shown
in detail, sheet 4, rather than as a weir. (Rev. 1) Comment addressed.
3. Grading and proposed 48' -15" HDPE or CMP shown within VDOT RW require VDOT permit. Explain
maintenance plan for this outfall. VDOT will not maintain structure or riprap. (Rev. 1) Comment
addressed.
4. Provide specific depth, length, distance dimensions for Filterra -SWM detention system necessary to review,
inspect, and construct these interconnected structures (supplement Americast typical detail on sheet 5).
(Rev. 1) Comment addressed.
5. Note —ACCD is in receipt of correspondence dated 6 -Jun 2014 from Filterra to Collins Engineering. Letter
affirms design and is included with file. (Rev. 1) Comment addressed.
6. Note - ACCD is in receipt of letters from Contech, dated 8 -Jul 2013 and 9 -Jun 2014, affirming designs of
underground detention systems proposed north (WP0201400030) and south (gas station) of Briarwood
Drive. Letters included with files. (Rev. 1) Comment addressed.
7. Note - Further plan review revision request must be accompanied by a VSMP GP registration form, revised
application fee, and additional information listed on a new VSMP application (WPO Virginia Stormwater
Management Program Application.pdf). SWM /ESC application used as recently as Jun -30, 2014 has been
replaced. New application is listed at: hqp : / /www.albemarle.org/deptforms .asp ?department= cdengwoo; it's
the last in a list of .pdf files. (Rev. 1) Comment acknowledged.
Engineering Review Comments
Page 2 of 3
1. New -With respect to SWPPP dated 7/20/14 prepared by Collins Engineering for construction
activities at Briarwood Commercial Lots, received 7/24/14:
Registration Statement (General VPDES Permit) latitude /longitude do not match SWPP coordinates; please
reconcile.
- Estimate start-finish / installation - removal dates throughout the SWPPP.
Revise inspection schedule (p. 26). Inspections are required at least once every 10 business days (plus
additional requirements). [Ref. 9VAC25- 880 -70, Part II, Stormwater Pollution Prevention Plan, F.,
Inspections, 2., Inspection Schedule]
- SWPPP, p. 26, identifies one individual responsible for inspection. Confirm that this individual accepts
sole responsibility for scheduled inspections, reporting, recordkeeping, notification, and for directing
corrective response relating to SWPPP proposed to cover all Briarwood Commercial projects.
ExHierr TO SHOW CONCRETE WASH OUT, PORTA- JOHNs, AND FUELING AREA (7/21/14): Show concrete wash
out area (not shown). Concrete wash out area/s may not drain to storm inlets. Propose treatment for concrete
wash waters. [§ 17- 404.B.]
- Show on -site dumpster. Provide treatment (or detention) of dumpster drain water. Dumpster runoff may
contain contaminants that may not discharge freely downslope, to a storm inlet, or to any stream. Provide silt
fence or earthen berm at porta johns as containment in event of spill. Furnish impermeable containment, a
barrier to infiltration designed to hold the entire volume of stored fuel in event of spill, with freeboard measure
of safety, for each fueling tank shown in the SWPP exhibit.
17- 404.13. La. Wash waters — "Minimize the discharge of pollutants from equipment and vehicle washing,
wheel wash water, and other wash waters. Wash waters must be treated in a sediment basin or alternative
control that provides equivalent or better treatment prior to discharge." Propose treatment for wash water.
- Construction entrance with wash rack to the north does not drain to a sediment basin; propose treatment.
Label construction entrance on plan sheets as Paved CE, with wash rack [ref. WP0201300072, E &S
Sequence of Construction Note 3]. Provide detail found at p. 27 of ACDSM —link:
http: / /www. albemarle. org/department. asp ?department= cdd &relpage =4447
- Transfer SWPPP best management practices to project plan sheets: practices or narrative listed/shown in
SWPPP and on WPO plans should mirror each other.
Revise SWPPP, SWPPP plan sheets, and corresponding WPO plan sheets.
2. New - Furnish letter of coverage, VDEQ General VPDES Permit —see #1 /p. 1, above.
Please feel free to call 434- 296 -583, ext. 3069 to discuss comments, especially #1 or 7.
Erosion and Sediment Control Plan (WP0201400059 /plans dated 12- Jun -14)
1. Comment applies to WP0201400059 [commercial site], WP0201400030 [underground storage
amendment], WP0201300072 [road plan WPO]): MS -19 — please reference Briarwood Channel Adequacy
Report, Nov -4, 2013, rev Jun -9, 2014 (Also, e -mail, Michelle Roberge, April 4, 2014, 11:19AM). For
portions of natural terrain that lie between outfalls of existing 24" CMP (MS -19 Cross Section #1) and
existing 18" concrete pipe (MS -19 Cross Section #3) beneath U.S. Rte. 29 and Herring Branch:
a. Photos indicate erosion down slope of pipe outfalls, an indication that receiving channels are
inadequate. The computations should reflect this, and appropriate measures should be specified to
correct the problem. The computations (roughness and velocities) appear to indicate conditions of
adequacy that do not exist. (Rev. 1) Addressed via Briarwood Channel Adequacy Report,
revised July 21, 2014.
2. Show SF / SAF along south edge of Briarwood Drive. (Rev. 1) Comment addressed.
3. Furnish perimeter control at NW corner of site. If site is developed prior to road (ref. SUB201400066),
ESC is needed to prevent runoff at the NW corner. (Rev. 1) Comment addressed.
4. Furnish sediment traps at low end of each diversion dike that ends at inlet (DI) of pipe beneath Briarwood
Drive. IP alone is insufficient. Jul -7 -14 site visit indicates DI of pipe beneath Briarwood Drive is elevated
well above existing grade, so runoff skirts this DI. Add note to modify existing grade at DI of pipe beneath
Briarwood Drive to ensure that runoff from site development and road construction reaches inlet without
bypassing onto paved surface of U.S. Rte. 29 (photos available). (Rev. 1) Comment addressed.
5. Furnish IP at proposed relocated DI in the median of Rte. 29. (Rev. 1) Comment addressed.
6. Show MU for areas to be mulched. (Rev. 1) Comment addressed.
Engineering Review Comments
Page 3 of 3
7. Show IP at existing inlet on the north side of Briarwood Drive, sheet 7. (Rev. 1) Comment addressed.
8. Show crest of stone weir elevation, sheet 8 (detail), as 427'. (Rev. 1) Comment addressed.
9. Land disturbance in VDOT RW requires VDOT permit. (Rev. 1) Comment acknowledged.
10. Remove Stormwater Runoff Considerations note, sheet 6 (applies to WP0201300072). (Rev. 1)
Comment addressed.
File: WP0201400059- briarwood -gas station- 080414rev -1
Review Comments
Project Name: Briarwood Commercial Lots - Gas Station Erosion and Sediment Control Plan
Date Completed: IThursday, July 24, 2014
Reviewer: Glenn Brooks
Department /Division /Agency: Engineering
Reviews
failed completeness check
Review Status: QC Denied
�pF A
�'717G1L31P
COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902 -4596
Phone (434) 296 -5832 Fax (434) 972 -4126
Project: Briarwood — Gas Station WPO
Plan preparer: Scott Collins; Collins Engineering [200 Garrett St., Suite K, Charlottesville, VA
22902, scottgcollins -en ineering corn]
Owner or rep.: Wendell Wood and Nena Harrell [ulcwww @embargmail.com]
Woodbriar Associates [P. O. Box 5548, Charlottesville, VA 22905]
Plan received date: 13 June 2014
Date of comments: 14 July, 2014
Reviewer: John Anderson
Stormwater Management Plan (WP0201400059)
1. Comment applies to WP0201400059 [site], WP0201400030 [underground storage amendment],
WP0201300072 [road plan WPO]): Furnish print or e -copy of state - issued Virginia Stormwater
Management Program VPDES (General) Permit for Briarwood development. WPO technical review
criteria depend upon General Permit status. We are in receipt of email explaining that project has VPDES
permit; based upon Jul -8 email assurance, it is assumed that technical criteria listed at 9VAC25- 870- 93/ -99
(Part II C) apply, but criteria listed at 9VAC25- 870- 62/ -92 (Part II B) may apply, depending upon permit
status. Further review and comment are contingent upon receipt of copy of VPDES GP. We have
requested information of VDEQ as well.
2. As follow -up to conversation 25 -June, revised design will include 3.0" (min) DIA low -flow orifice at low
point of 10' -DIA underground detention system. With this change, other system dimensions may change.
SCS routing results may change. Please revise design, and provide revised routing calculations. Also,
outfall control structure 1 should be modeled as an orifice with area equivalent to the circle segment shown
in detail, sheet 4, rather than as a weir.
3. Grading and proposed 48' -15" HDPE or CMP shown within VDOT RW require VDOT permit. Explain
maintenance plan for this outfall. VDOT will not maintain structure or riprap.
4. Provide specific depth, length, distance dimensions for Filterra -SWM detention system necessary to review,
inspect, and construct these interconnected structures (supplement Americast typical detail on sheet 5).
5. Note —ACCD is in receipt of correspondence dated 6 -Jun 2014 from Filterra to Collins Engineering. Letter
affirms design and is included with file.
6. Note - ACCD is in receipt of letters from Contech, dated 8 -Jul 2013 and 9 -Jun 2014, affirming designs of
underground detention systems proposed north (WP0201400030) and south (gas station) of Briarwood
Drive. Letters included with files.
7. Note - Further plan review revision request must be accompanied by a VSMP GP registration form, revised
application fee, and additional information listed on a new VSMP application (WPO Virginia Stormwater
Management Program Application.pdf). SWM/ESC application used as recently as Jun -30, 2014 has been
replaced. New application is listed at: http : / /www.albemarle.org/dgptforms .asp ?department --cdengwpo; it's
the last in a list of .pdf files.
Please feel free to call 434- 296 -583, ext. 3069 to discuss comments, especially #1 or 7.
Erosion and Sediment Control Plan (WP0201400059 /plans dated 12- Jun -14)
1. Comment applies to WP0201400059 [commercial site], WP0201400030 [underground storage
amendment], WP0201300072 [road plan WPO]): MS -19 — please reference Briarwood Channel Adequacy
Engineering Review Comments
Page 2 of 2
Report, Nov -4, 2013, rev Jun -9, 2014 (Also, e -mail, Michelle Roberge, April 4, 2014, 11:19AM). For
portions of natural terrain that lie between outfalls of existing 24" CMP (MS -19 Cross Section #1) and
existing 18" concrete pipe (MS -19 Cross Section #3) beneath U.S. Rte. 29 and Herring Branch:
a. Photos indicate erosion down slope of pipe outfalls, an indication that receiving channels are
inadequate. The computations should reflect this, and appropriate measures should be specified to
correct the problem. The computations (roughness and velocities) appear to indicate conditions of
adequacy that do not exist.
2. Show SF / SAF along south edge of Briarwood Drive.
3. Furnish perimeter control at NW corner of site. If site is developed prior to road (ref. SUB201400066),
ESC is needed to prevent runoff at the NW corner.
4. Furnish sediment traps at low end of each diversion dike that ends at inlet (DI) of pipe beneath Briarwood
Drive. IP alone is insufficient. Jul -7 -14 site visit indicates DI of pipe beneath Briarwood Drive is elevated
well above existing grade, so runoff skirts this DI. Add note to modify existing grade at DI of pipe beneath
Briarwood Drive to ensure that runoff from site development and road construction reaches inlet without
bypassing onto paved surface of U.S. Rte. 29 (photos available).
5. Furnish IP at proposed relocated DI in the median of Rte. 29.
6. Show MU for areas to be mulched.
7. Show IP at existing inlet on the north side of Briarwood Drive, sheet 7.
8. Show crest of stone weir elevation, sheet 8 (detail), as 427'.
9. Land disturbance in VDOT RW requires VDOT permit.
10. Remove Stormwater Runoff Considerations note, sheet 6 (applies to WP0201300072).
File: WP0201400059- briatwood -gas station- 071414rev
Contech Engineered Solutions LLC
C-..,NTECH` 605 Global Way,Suite 113
Linthicum,MD 21090
ENGINEERED SOLUTIONS Phone:866-740-3318
www.ContechES corn
Graham Murray, PE June 9th, 2014
Collins Engineering
200 Garrett Street, Suite K
Charlottesville, VA 22902
RE: Review of CMP Detention Design for Briarwood-Gas Station in Albemarle County,VA.
The purpose of this letter is to document for Albemarle County our review of the plans and the proposed application of
the CMP Detention system at this site as you have requested.
Contech has reviewed underground detention system design for new construction at the Briarwood Gas Station. The
layout of the bulkheads, manhole risers and outlet control weir plate are located in the proper places and can easily be
fabricated at a Contech plant. The configuration of the system inlet and outlet pipes is acceptable. The system appears
to be constructible and is located in order to facilitate maintenance activities.
In summary,the system is expected to operate in accordance with Contech Engineered Solutions'design intent.
Please feel free to contact me if you have any questions or concerns.
Sincerely,
Aaron M. Lowell
Design Engineer—Stormwater Products
Contech Engineered Solutions LLC
alowell @conteches.com
Graham Murray P.E.
Collins Engineering
200 Garrett Street Suite K
Charlottesville, VA 22902 fi effd
June 6, 2014 A Growing Idea in Stonnaakr nitration.
Plan Review of Filterra®
Briarwood Gas Station, Albemarle, VA
Dear Sirs
Thank you for submitting the revised plans on June 6 2014 for our review of the
Briarwood Gas Station project.
Filterra® structures F1(10x6)and F2 (10x6)were studied for;
• Planned Filterra®box size
• Filterra®contributing drainage area meeting project's regional sizing specification
• Filterra® invert elevations are higher than effluent invert elevations
• The bypass is lower than the Filterra® elevation (spot elevations)
• The grading pattern encourages cross linear flow and not head-on flow
• The Filterra®outlet drain pipe is sized correctly and exits perpendicular to the wall
• For any conflicting structures such as storm drain pipes below Filterra®
• For most efficient placement of Filterra®units
• 4-6"opening throat detail and standard notes on plans
The plan review concluded that the Filterra®structure listed above is sited and sized
appropriately to treat stormwater to our published specifications.
Operational consistency with these specifications is contingent upon the stormwater unit
being installed correctly and according to the plans, as well as regular maintenance being
performed. Installation Help documents will be forwarded to the Buyer at time of order.
The Filterra®Installation, Operation and Maintenance Manual will be made available
upon request.
Yours sincerely
Duane Vincent
Engineer Support
Filterra® Bioretention Systems
Manufactured by Americast T:(804)798-6068 A M E R 1 CAST
11352 Virginia Precast Road F:(804)798-8400 not just concrete,concrete solutions.
Ashland,VA 23005 E:design @filterra.com www.filterra.com
Graham Murray P.E.
Collins Engineering
200 Garrett Street Suite K
Charlottesville, VA 22902
fj
rr
June 6, 2014 :1 Growing Idea in Sturmwater Filtration.
Plan Review of Filterra®
Briarwood Gas Station, Albemarle, VA
Dear Sirs
Thank you for submitting the revised plans on 29 November 2010 for our review of the
Briarwood Gas Station project.
Filterra® structures F1(10x6) and F2 (10x6) were studied for;
• Planned Filterra® box size
• Filterra® contributing drainage area meeting project's regional sizing specification
• Filterra® invert elevations are higher than effluent invert elevations
• The bypass is lower than the Filterra® elevation(spot elevations)
• The grading pattern encourages cross linear flow and not head-on flow
• The Filterra® outlet drain pipe is sized correctly and exits perpendicular to the wall
• For any conflicting structures such as storm drain pipes below Filterra®
• For most efficient placement of Filterra® units
• 4-6" opening throat detail and standard notes on plans
The plan review concluded that the Filterra® structure listed above is sited and sized
appropriately to treat stormwater to our published specifications.
Operational consistency with these specifications is contingent upon the stormwater unit
being installed correctly and according to the plans, as well as regular maintenance being
performed. Installation Help documents will be forwarded to the Buyer at time of order.
The Filterra® Installation, Operation and Maintenance Manual will be made available
upon request.
Yours sincerely
Lis (.02■11
Duane Vincent
Engineer Support
Filterra®Bioretention Systems
Manufactured by Americast T:(804)798-6068 AMERICAS T
11352 Virginia Precast Road F: (804)798-8400 not just concrete,concrete solutions.
Ashland, VA 23005 E: design @filterra.com www.filterra.com