HomeMy WebLinkAboutWPO201500055 Review Comments 2016-05-19Short Review Comments Report for:
WPO201500055
SubApplication Type:
Branchlands Whistler House - VSMP
Stormwater Management/BMP Plan
Erosion and Sediment Control Plan
Stream Buffer Development Request
Date Completed:10/08/2015
Reviewer:John Anderson CDD Engineering
Review Status:Denied
Reviews Comments:
Division:
Date Completed:
Reviewer:Troy Austin VDOT
Review Status:Pending
Reviews Comments:
Division:
Date Completed:12/15/2015
Reviewer:John Anderson CDD Engineering
Review Status:Denied
Reviews Comments:
Division:
Date Completed:02/21/2016
Reviewer:John Anderson CDD Engineering
Review Status:Denied
Reviews Comments:
Division:
Date Completed:03/18/2016
Reviewer:John Anderson CDD Engineering
Review Status:See Recommendations
Reviews Comments:Please revise SWPPP (exhibit; ref. two new comments), and then submit plan/SWPPP
(signed/dated), and documentation of payment of nutrient credits for VSMP Plan Approval. .PDF
preview welcome. janderson2 3/18/2016 6:13 AM
_________________________ following update: janderson2 5/25/2016 3:02 PM
Nutrient credits:
Finalized. Ref. email, LJ Lopez (psprouse@rebkee.com); Tue 5/24/2016 10:20 AM
“Ana:
Attached is the Affidavit for Nutrient Credit Purchase of Branchlands. Another item checked off the
list."
Division:
Date Completed:05/25/2016
Reviewer:John Anderson CDD Engineering
Review Status:See Recommendations
Reviews Comments:VSMP bond estimate amounts sent to A. Kilmer, Wed 5/25/2016 6:23 PM (email).
Division:
Date Completed:05/19/2016
Ana Kilmer
Page:1 of 2 County of Albemarle Printed On:February 13, 2017
Reviewer:Ana Kilmer
Review Status:Approved
Reviews Comments:5/10/2016 - swa was submitted
5/11/2016 - swa approved by CAO
5/11/2016 - swa in CE office
5/16/2016 - swa approved by the county
5/19/2016 - swa recorded at clerks office, deed book 4758, page 733.
Division:
Page:2 of 2 County of Albemarle Printed On:February 13, 2017
COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902-4596
Phone (434) 296-5832 Fax (434) 972-4126
VSMP Permit plan review
Project:
Branchland Whistler House —VSMP
Plat/Plan preparer:
Craig Kotarski, Timmons Group
919 2' St. SE, Charlottesville, VA 22902 craig.kotarskiAtimmons.com
Owner:
Wial LLC, 12095 Gayton Rd, Richmond, VA 23238 [Graham Aldelman]
Owner Rep:
L. J. Lopez, Milestone Partners, 300 2"d St. NE, Charlottesville, VA 22920
llopezkniilestonepartners.co
Plan received date:
24 Aug 2015 / e -plans
(Rev. 1):
18 Nov 2015 / e -plans
(Rev. 2):
19 Jan 2016 / e -plans
Date of comments:
8 Oct 2015 / e -review
(Rev. 1):
15 Dec 2015 / e -review
(Rev. 2):
21 Feb 2016 / e -review
Reviewer:
John Anderson
A. Stormwater Pollution Prevention Plan (SWPPP)
The SWPPP content requirements can be found in County Code section 17-405. A SWPPP must contain (1)
a PPP, (2) an ESCP, (3) a SWMP, and (4) any TMDL measures necessary.
Comments reference binder dated 22 -Jun 2015 —Recommend do not re -submit SWPPP until ESC/SWM plan
comments addressed. SWPPP contains reduced -size ESC and SWM plans.(Bev. 2 Please submit SWPPP.
1. Sec. 1, Registration Statement —please sign/date.
2. Sec. 4,5 —Revise per comments. Recommend wait until ESCP/SWMP comments addressed.
3. Sec. 6 —Revise 11" x 17" PPP Exhibit: Relocate mortar mix/concrete washout so distant from future
bioretention. Describe berm containment: impermeable heavy -mil linerNolume sufficient to contain stored
fuel volume +10%. Show solvent/paint/chemical storage. Add SF or similar downslope of temporary
toilets. Show non -hazardous solid waste collection (dumpster) draining to ST, or equivalent. Show
sediment basin or equivalent to capture wash waters.
4. Sec. 6.c. —Delete `No concrete washout shall occur on site.'
5. Sec. 6.c. —Delete `Existing basketball court to the north.'
6. Sec. 9 —Certification Statement: sign/date.
B. VSMP: SWPPP: Stormwater Management Plan (WP0201500055)
VSMP Regulation 9VAC25-870-108 requires the VSMP authority to approve or disapprove a SWMP. This plan is
disapproved for minor reason in comment #33, below.
1. C0.0 —Revise Title: Branchlands Memory Care and Assisted Living, VSMP WPO201500055. (Rev. 1)
Addressed.
Remove sheets C1.0, C1.1, L-001. Please mark through sheet numbers in index. (Rev. 1) Addressed.
C3.1 —Revise IP @ Nyoplast overflow structure. Bioretention may not be installed until all upslope areas
are stabilized. IP will not be required for bioretention overflow structure. (Rev. 1) Addressed.
Engineering Review Comments
Page 2 of 4
4. C4.0/4.1 -Revise sheet titles to `Site Layout' or similar. A VSMP may not approve a site plan. (Rev. 1)
Addressed.
5. C0.0 -Edit index. Ref. item #4. (Rev. 1) Addressed.
6. C4.1 -Label pipe structure #105. (Rev. 1) Addressed.
7. C4.1 -Label DI structure #108. (Rev. 1) Addressed.
8. C4.1 -Revise bottom of bioretention label to read floor elevation (or grade elevation) of bioretention.
(Rev. 1) Addressed.
9. C4.1 -Label bioretention clean-out. Label bioretention overflow structure. (Rev. 1) Addressed.
10. LD -229: Storm Sewer Design Computations -in this (or separate table) list pipe structures # 109, 107.
(Rev. 1) Addressed.
11. C6.0 -Pipe Str. # 109 (6.83' of 15" HDPE), 107 (22.74' of 15" HDPE) @ 0.00% slope is problematic.
Revise to provide positive slope at least 0.5%. (Rev. 1) Addressed.
12. C4.1 -There appears to be no MH access to either ADS "Stormtech" System (Area to W), or 3 -line, 125' L
60" DIA storage system (Area to S). Provide manway access to each system. (Rev. 1) Addressed.
13. C4.1 -Provide notes, labels, or detail that shows how the two 50' lines of ADS system make connection,
with particular emphasis on Access for maintenance. Ensure that each line is accessible. Provide same for
60" DIA, 125' L detention system (Area to S). All detention system lines must be accessible. Design
should ensure debris accumulation will not block, back-up, or short-circuit either system. (Rev. 1)
Addressed.
14. C4.1 -Provide new Str. #104 away from biofilter; use Std. MH. The biofilter 24" Nyoplast overflow
structure (dome drain) will be upstream of this MH. The Nyoplast structure is ineligible as an inline storm
system element. Organic debris is likely to collect at the base of the overflow structure. Any obstruction of
the 24" (dome drain) overflow structure will compromise the entire Area to W storm runoff system. (Rev.
1) Addressed.
15. C5.1 -Recommend revise elevation of 4" perforated underdrain to 424.33' (biofilter). (Rev. 1) Addressed.
16. C5.0 or C5.1 -Add Note: Bioretention may not be installed until all upslope areas are stabilized. IP will not
be required for bioretention overflow structure. (Rev. 1) Addressed.
17. C5.0 or C5.1 -Provide bioretention planting schedule. (Rev. 1) Addressed.
18. C5.1 -Revise `bottom of biofilter 427.50' to read top of biofllter Mix. (Rev. 1) Addressed.
19. C5.1 -Label elevation/top of biofilter cleanout: set Elev. at least 4-6" above 3" hardwood bark mulch.
(Rev. 1) Addressed.
20. C5.1 -Label %slope of line between biofilter overflow structure and new MH (2% Min). Also, items #14,
29. (Rev. 1) Addressed.
21. C5.1 -Provide plan view, Str. #106. Plan view/design must provide means of clearing pipe #107 of debris.
(Rev. 1) Addressed.
22. C5.1 -WEIR Plate in Str. 106 Detail -Show top of structure (top of weir/top of storage are shown). C6.0
shows Str. 106: MH -1 W/ WEIR PLATE, TOP =430.04'. (Rev. 1) Partially addressed. Str. 106 Detail.
Please review 10 yr-WSE which appears to be high/in wrong location. (Rev. 2) Addressed.
23. C6.0 -Pipe #207, 205: Increase DIA to 15" Min. (Yard inlet system 12" DIA, is the exception). (Rev. 1)
Addressed.
24. Revise LD -229 to reflect pipe DIA increase, item #23. (Rev. 1) Addressed.
25. C4. VC6.0 -It is unclear how Str. 112, listed as MH -1, functions. Str. is located in parking area that routes
to UG Detention, but is not identified as a grate or DI. Confirm design; revise profile label as necessary.
(Rev. 1) Addressed.
26. C6.0 -Str 204-218 profile: Revise label to read INV IN 435.00 (213) (Rev. 1) Addressed.
27. Revise Str. 213 DIA to 15" Min; this leads from a standard VDOT DI to the 3 -line 60" DIA UG Detention
system. (Rev. 1) Addressed.
28. C6.0 -Profile, Str. 200-204: Label horizontal separation between steel plate weir wall and end wall of 60"
CMP storage pipe. Consider maintenance, and design reasonable access to this space. With 1.0' Max
clearance above the weir plate (rapidly diminishes since circular), it is likely not possible to access the
Engineering Review Comments
Page 3 of 4
downstream side of the weir plate in the 60" system, should need arise. (Rev. 1) Partially addressed. As
follow-up: 60" system 6" orifice detail elevation inconsistent with profile elevation. Please revise. Image
[Rev. 2 —image deleted] (Rev.2.) Addressed.
29. C6.0 —Revise profile, Str. 100-110. Provide Std. MH. Ref. item #14, above. (Rev. 1) Addressed.
30. C6.0 —Provide profile for line from biofilter overflow structure to New MH. —Also, item #29 (Rev. 1)
Addressed.
31. C5.1 —Revise WEIR Plate in 60" System Detail. Show as circular (plate is circular). (Rev. 1) Addressed.
32. Provide documentation of purchase of nutrient credits: (Rev. 1) Acknowledged.
E. Documentation of the applicant's acquisition of nutrient credits shall be provided to the VSMP authority and
the Department in a certification from the credit provider documenting the number of phosphorus nutrient
credits acquired and the associated ratio of nitrogen nutrient credits at the credit -generating entity. Until the
effective date of regulations establishing application fees in accordance with § 62.1-44.19:20, the credit
provider shall pay the Department a water quality enhancement fee equal to six percent of the amount paid by
the applicant for the credits. Such fee shall be deposited into the Virginia Stormwater Management Fund
established by § 62.1-44.15:29.
17 Nov 2015 Applicant comment response letter: "Nutrient credit pruchase documentationw will be provided closer to
final approval."
New
33. C6.0 —Provide/show Manway structures for StormTech and 60" CMP storage pipe systems in profile views.
(Rev. 2) Partially Addressed. Provide section view of arched chamber system; show arch. Restore view
included with last submission, deleted with this plan submission; sheet C5.1. plans, belo'�:
CONVEYANCEPIPE _
MATVARY
(PVC,C,HHOPEOPE, ETC.)
INSERTA TEE
CONNECTION
INSERTA TEE DETAIL
NTS
(X)
DO NOT INSTALL
INSERTA-TEEAT
CHAMBER JOINTS
A
A
INSERTA TEE TO BE
INSTALLED, CENTERED
OVER CORRUGATION
PLACE ADS GEOSYNTHETICS 315 WOVEN
CEOTEXTILE(CENTERED ON INSERTATEESECTION
A -A SIDE VIEW
INLET)OVER BEDDING STONE FOR SCOUR
PROTECTION AT SIDE INLET CONNECTIONS.
GEOTE%TLE MUST EXTEND 8' (150 mm)
MAX DIAMETER OF HEIGHT FROM BASE OF
PAST CHAMBER FOOT
CHAMBER
INSERTATEE CHAMBER (X)
SC -310 6'(150 mm) V (100 mm)
SC -740 10' (250 mm) 4'(100-)
DC 780 10' (250 mm} 4'(100-)
MC -35W 12' (300 mm) 6'(150-)
NOTE:
MC -450D 12' (300 mm) B' (200 mm)
PART NUMBERS WILL VARY BASED ON INLET PIPE MATERIALS.
INSERTA TEE FITTINGS AVAILABLE FOR SDR 26, SDR 35, SCH 40 IPS
CONTACT STORMTECH FOR MORE INFORMATION.
GASXETED 8 SOLVENT WELD, N-12, HP STORM, 0900 OR DUCTILE IRON
34. C6.0 —Specify gauge (steel thickness) of 60" CMP storage pipe system and both weir plates, if not shown.
(Rev. 2) Addressed.
C. VSMP: SWPPP: Erosion Control Plan (WP0201500055)
Virginia Code §62.1-44.15:55 requires the VESCP authority to approve or disapprove an ESCP. This plan is approved.
C3.0 —Sediment trap design Elev. vs wet/dry storage —If table presents Vol. per 1' vertical interval, please
clarify. It appears, for example, that Elev. 423.7' provides <43.4 cy storage, when it may provide < 80.4
cy. Please Add note or revise volume(cy) heading to indicate incremental storage (/1' interval). Revise
values as necessary. (Rev. 1) Addressed.
C3.1 —Revise ESC Legend, soil stabilization blanket =BM. (Rev. 1) Addressed.
Engineering Review Comments
Page 4 of 4
3. C3.1 —Label floor of sediment trap, plan view (16' X 52'). (Rev. 1) Partially addressed/misunderstanding.
As follow-up: please add sediment trap floor dimensions to plan view: (16' X 52). (Rev. 2) Addressed.
4. C3.1 —Provide vegetative cover hardier than grass for proposed 2:1 slopes along SW edge of building.
(ACDSM 8.A.2.); Ref Phase II. (Rev. 1) Addressed.
5. C3.1/C5.1 —Specify material (Eley. 42P to 424') to replace excavated material beneath bioretention since
C3.1 stipulates removal to Elev. 421.00'. (Rev. 1) Addressed.
6. Show soil stockpile location, if any. (Rev. 1) Addressed.
Engineering plan review staff are available from 2-4 PM on Thursdays, should you require a meeting to discuss this
review. Plan review staff are also available at 434-296-5832 (-x3069) should you have questions.
Process:
After approval, plans will need to be bonded. The bonding process is begun by submitting a bond estimate request
form and fee to the Department of Community Development. One of the plan reviewers will prepare estimates and
check parcel and easement information based on the approved plans. The County's Management Analyst will
prepare bond agreement forms, which will need to be completed by the owner and submitted along with cash,
certificates or sureties for the amounts specified. The agreements will need to be approved and signed by the County
Attorney and County Engineer. This may take 2-4 weeks to obtain all the correct signatures and forms.
Stormwater Management Facilities Maintenance agreements will also need to be completed and recorded. The
County's Management Analyst or other staff will prepare the forms and check for ownership and signature
information. The completed forms will need to be submitted along with court recording fees.
After bonding and agreements are complete, county staff will need to enter project information in a DEQ database
for state application processing. DEQ will review the application information based on local VSMP authority
approval. At this time, the DEQ portion of the application fees will need to be paid directly to the state. For fastest
processing, this is done electronically with the emails provided on the application. DEQ should notify applicants
with instructions on how to pay fees. When DEQ approves the application, they will issue a permit coverage letter.
This should be copied to the county.
After DEQ coverage is issued, via the coverage letter, the County can hold a pre -construction conference. Applicants
will need to request a pre -construction conference by completing a form, and pay the remainder of the application
fee. The form identifies the contractor and responsible land disturber, and the fee remaining to be paid. This will be
checked by county staff, and upon approval, a pre -construction conference will be scheduled with the County
inspector. At the pre -construction conference, should everything proceed satisfactorily, a joint VSMP and grading
permit will be issued by the County so that work may begin.
County forms can be found on the county website forms center under engineering;
htt2://www.albemarle.ora/deptforms.asp?dgpartment=cdengmMo
Thank you /434.296-5832 —x3069
WP0201500055_Branchlands MemCare_VSMP_022116rev2
pF A
vt�r�1Q
COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902 -4596
Phone (434) 296 -5832 Fax (434) 972 -4126
VSMP Permit plan review
Project:
Branchland Whistler House —VSMP
Plat /Plan preparer:
Craig Kotarski, Timmons Group
919 2' St. SE, Charlottesville, VA 22902 craig.kotarskiAtimmons.com
Owner:
Wial LLC, 12095 Gayton Rd, Richmond, VA 23238 [Graham Aldelman]
Owner Rep:
L. J. Lopez, Milestone Partners, 300 2nd St. NE, Charlottesville, VA 22920
llopezkmilestonepartners.co
Plan received date:
24 Aug 2015 / e -plans
(Rev. 1):
18 Nov 2015 / e -plans
Date of comments:
8 Oct 2015 / e- review
(Rev. 1):
15 Dec 2015 / e- review
Reviewer:
John Anderson
A. Stormwater Pollution Prevention Plan (SWPPP)
The SWPPP content requirements can be found in County Code section 17 -405. A SWPPP must contain (1)
a PPP, (2) an ESCP, (3) a SWMP, and (4) any TMDL measures necessary.
Comments reference binder dated 22 -Jun 2015 — Recommend do not re- submit SWPPP until ESC /SWM plan
comments addressed. SWPPP contains reduced -size ESC and SWM plans.
1. Sec. 1, Registration Statement — please sign/date.
2. Sec. 4,5 — Revise per comments. Recommend wait until ESCP /SWMP comments addressed.
3. Sec. 6 — Revise 11" x 17" PPP Exhibit: Relocate mortar mix/concrete washout so distant from future
bioretention. Describe berm containment: impermeable heavy -mil linerNolume sufficient to contain stored
fuel volume +10 %. Show solvent /paint /chemical storage. Add SF or similar downslope of temporary
toilets. Show non - hazardous solid waste collection (dumpster) draining to ST, or equivalent. Show
sediment basin or equivalent to capture wash waters.
4. Sec. 6.c. — Delete `No concrete washout shall occur on site.'
5. Sec. 6.c. — Delete `Existing basketball court to the north.'
6. Sec. 9 — Certification Statement: sign/date.
B. VSMP: SWPPP: Stormwater Management Plan (WP0201500055)
VSMP Regulation 9VAC25- 870 -108 requires the VSMP authority to approve or disapprove a SWMP. This plan is
disapproved for reasons provided in comments below. The stormwater management plan content requirements can be
found in County Code section 17 -403
1. C0.0 — Revise Title: Branchlands Memory Care and Assisted Living, VSMP WPO201500055. (Rev. 1)
Addressed.
2. Remove sheets C 1.0, C 1. 1, L -001. Please mark through sheet numbers in index. (Rev. 1) Addressed.
3. C3.1 — Revise IP @ Nyoplast overflow structure. Bioretention may not be installed until all upslope areas
are stabilized. IP will not be required for bioretention overflow structure. (Rev. 1) Addressed.
Engineering Review Comments
Page 2 of 5
4. C4.0/4.1 - Revise sheet titles to `Site Layout' or similar. A VSMP may not approve a site plan. (Rev. 1)
Addressed.
5. C0.0 -Edit index. Ref. item #4. (Rev. 1) Addressed.
6. C4.1 -Label pipe structure #105. (Rev. 1) Addressed.
7. C4.1 -Label DI structure #108. (Rev. 1) Addressed.
8. C4.1 - Revise bottom of bioretention label to read floor elevation (or grade elevation) of bioretention.
(Rev. 1) Addressed.
9. C4.1 -Label bioretention clean -out. Label bioretention overflow structure. (Rev. 1) Addressed.
10. LD -229: Storm Sewer Design Computations -in this (or separate table) list pipe structures # 109, 107.
(Rev. 1) Addressed.
It. C6.0 -Pipe Str. # 109 (6.83' of 15" HDPE), 107 (22.74' of 15" HDPE) @ 0.00% slope is problematic.
Revise to provide positive slope at least 0.5 %. (Rev. 1) Addressed.
12. C4.1 -There appears to be no MH access to either ADS "Stormtech" System (Area to W), or 3 -line, 125' L
60" DIA storage system (Area to S). Provide manway access to each system. (Rev. 1) Addressed.
13. C4.1 - Provide notes, labels, or detail that shows how the two 50' lines of ADS system make connection,
with particular emphasis on Access for maintenance. Ensure that each line is accessible. Provide same for
60" DIA, 125' L detention system (Area to S). All detention system lines must be accessible. Design
should ensure debris accumulation will not block, back -up, or short- circuit either system. (Rev. 1)
Addressed.
14. C4.1 - Provide new Str. #104 away from biofilter; use Std. MH. The biofilter 24" Nyoplast overflow
structure (dome drain) will be upstream of this MH. The Nyoplast structure is ineligible as an inline storm
system element. Organic debris is likely to collect at the base of the overflow structure. Any obstruction of
the 24" (dome drain) overflow structure will compromise the entire Area to W storm runoff system. (Rev.
1) Addressed.
15. C5.1 - Recommend revise elevation of 4" perforated underdrain to 424.33' (biofilter). (Rev. 1) Addressed.
16. C5.0 or C5.1 -Add Note: Bioretention may not be installed until all upslope areas are stabilized. IP will not
be required for bioretention overflow structure. (Rev. 1) Addressed.
17. C5.0 or C5.1 - Provide bioretention planting schedule. (Rev. 1) Addressed.
18. C5.1 - Revise `bottom of biofilter 427.50' to read top of biofilter Mix. (Rev. 1) Addressed.
19. C5.1 -Label elevation/top of biofilter cleanout: set Elev. at least 4 -6" above 3" hardwood bark mulch.
(Rev. 1) Addressed.
20. C5.1 -Label %slope of line between biofilter overflow structure and new MH (2% Min). Also, items #14,
29. (Rev. 1) Addressed.
21. C5.1 - Provide plan view, Str. #106. Plan view /design must provide means of clearing pipe #107 of debris.
(Rev. 1) Addressed.
22. C5.1 -WEIR Plate in Str. 106 Detail -Show top of structure (top of weir /top of storage are shown). C6.0
shows Str. 106: MH -1 W/ WEIR PLATE, TOP = 430.04'. (Rev. 1) Partially addressed. Str. 106 Detail.
Please review 10 yr -WSE which appears to be high/in wrong location.
TOP OF STIR 106
TOP OF 4' WEIR 430.04
PLATE 426.70 TOP OF STORAGE
427.20
4.0' - - - - -Q 100YEARWSE
426.90
- - - - -- 1.01 --- - - - - -� 10 YEAR WSE
425.19
STEEL PLATE 2 YEAR WSE
5j5' 50, - - - -- - - - - - -- - Q- 423.38
I INV 423.ORIFICE 80
ELEV.
421.20
`3.0" ORIFICE
INV 421.20
WEIR PLATE SECTION
WEIR PLATE IN STIR 106 DETAIL
Engineering Review Comments
Page 3 of 5
23. C6.0 -Pipe #207, 205: Increase DIA to 15" Min. (Yard inlet system 12" DIA, is the exception). (Rev. 1)
Addressed.
24. Revise LD -229 to reflect pipe DIA increase, item #23. (Rev. 1) Addressed.
25. C4.1 /C6.0 -It is unclear how Str. 112, listed as MH -1, functions. Str. is located in parking area that routes
to UG Detention, but is not identified as a grate or DI. Confirm design; revise profile label as necessary.
(Rev. 1) Addressed.
26. C6.0 -Str 204 -218 profile: Revise label to read INV IN 435.00 (213) (Rev. 1) Addressed.
27. Revise Str. 213 DIA to 15" Min; this leads from a standard VDOT DI to the 3 -line 60" DIA UG Detention
system. (Rev. 1) Addressed.
28. C6.0 - Profile, Str. 200 -204: Label horizontal separation between steel plate weir wall and end wall of 60"
CMP storage pipe. Consider maintenance, and design reasonable access to this space. With 1.0' Max
clearance above the weir plate (rapidly diminishes since circular), it is likely not possible to access the
downstream side of the weir plate in the 60" system, should need arise. (Rev. 1) Partially addressed. As
follow-up: 60" system 6" orifice detail elevation inconsistent with profile elevation. Please revise. Image:
STEELPLATEWEIR WALL
6.5 "ORIFICE 431.50
�' t1 6"ORIFICE BIOMI' 432.50
425 TOPWEIR 435.50 THEO
204; 60'CMP - ,
29. ,O.0 - Revise prof le, qtr. I uu -< <u. erovioe Std. MH. Ret. Item #14, above. (Rev. 1) Addressed.
TOP OF
WEIR
F STORAGE
PLATE 435.50
TOP
43650
OF STORAGE
[ "on N4p
- - -- --
100 YEAR W SE
- -436.8
k4ff
_______
_ g UM-WSE
435.06
�R
2 YEAR W
n
43x.00
440
Ne20
8.0' ORROUND
INV 433 ,6.
E
44>>>
R'rOzZ 2.6'Min CAVM
=
4.0'
204: 60'CMP
ELEV.
431.50
435
STORAGE PIPE
TO ELEV. 436.50
6.5"ORIFICE
BOTTOM ELEV. 431.50
INV 431.50
INV OUT 431.50 (203)
WEIR PLATE SECTION
430
IN 60" SYSTEM
STEELPLATEWEIR WALL
6.5 "ORIFICE 431.50
�' t1 6"ORIFICE BIOMI' 432.50
425 TOPWEIR 435.50 THEO
204; 60'CMP - ,
29. ,O.0 - Revise prof le, qtr. I uu -< <u. erovioe Std. MH. Ret. Item #14, above. (Rev. 1) Addressed.
Engineering Review Comments
Page 4of5
30. C6.0 - Provide profile for line from biofilter overflow structure to New MH. -Also, item #29 (Rev. 1)
Addressed.
31. C5.1 - Revise WEIR Plate in 60" System Detail. Show as circular (plate is circular). (Rev. 1) Addressed.
32. Provide documentation of purchase of nutrient credits: (Rev. 1) Acknowledged.
E. Documentation of the applicant's acquisition of nutrient credits shall be provided to the VSMP authority and
the Department in a certification from the credit provider documenting the number of phosphorus nutrient
credits acquired and the associated ratio of nitrogen nutrient credits at the credit - generating entity. Until the
effective date of regulations establishing application fees in accordance with § 62.1 - 44.19:20, the credit
provider shall pay the Department a water quality enhancement fee equal to six percent of the amount paid by
the applicant for the credits. Such fee shall be deposited into the Virginia Stormwater Management Fund
established by § 62.1 - 44.15:29.
17 Nov 2015 Applicant comment response letter: "Nutrient credit pruchase documentationw will be provided closer to
final approval."
New
33. C6.0 - Provide /show Manway structures for StormTech and 60" CMP storage pipe systems in profile views.
34. C6.0 - Specify gauge (steel thickness) of 60" CMP storage pipe system and both weir plates, if not shown.
C. VSMP: SWPPP: Erosion Control Plan (WPO201500055)
Virginia Code §62.1- 44.15:55 requires the VESCP authority to approve or disapprove an ESCP. This plan is disapproved
for reasons provided in comments below. The erosion control plan content requirements can be found in County Code
section 17 -402.
1. C3.0 - Sediment trap design Elev. vs wet /dry storage -If table presents Vol. per V vertical interval, please
clarify. It appears, for example, that Elev. 423.7' provides <43.4 cy storage, when it may provide < 80.4
cy. Please Add note or revise volume(cy) heading to indicate incremental storage (/1' interval). Revise
values as necessary. (Rev. 1) Addressed.
2. C3.1 - Revise ESC Legend, soil stabilization blanket =13M. (Rev. 1) Addressed.
3. C3.1 -Label floor of sediment trap, plan view (16' x 52'). (Rev. 1) Partially addressed /misunderstanding.
As follow -up: please add sediment trap floor dimensions to plan view: (16' x 52).
4. C3.1 - Provide vegetative cover hardier than grass for proposed 2:1 slopes along SW edge of building.
(ACDSM 8.A.2.); Ref, Phase II. (Rev. 1) Addressed.
5. C3.IIC5.1 - Specify material (Elev. 42 P to 424') to replace excavated material beneath biorctention since
C3.1 stipulates removal to Elev. 421.00'. (Rev. 1) Addressed.
6. Show soil stockpile location, if any. (Rev. 1) Addressed.
Engineering plan review staff are available from 2 -4 PM on Thursdays, should you require a meeting to discuss this
review. Plan review staff are also available at 434 - 296 -5832 (- x3069) should you have questions.
Process:
After approval, plans will need to be bonded. The bonding process is begun by submitting a bond estimate request
form and fee to the Department of Community Development. One of the plan reviewers will prepare estimates and
check parcel and easement information based on the approved plans. The County's Management Analyst will
prepare bond agreement forms, which will need to be completed by the owner and submitted along with cash,
certificates or sureties for the amounts specified. The agreements will need to be approved and signed by the County
Attorney and County Engineer. This may take 2 -4 weeks to obtain all the correct signatures and forms.
Stormwater Management Facilities Maintenance agreements will also need to be completed and recorded. The
County's Management Analyst or other staff will prepare the forms and check for ownership and signature
information. The completed forms will need to be submitted along with court recording fees.
Engineering Review Comments
Page 5 of 5
After bonding and agreements are complete, county staff will need to enter project information in a DEQ database
for state application processing. DEQ will review the application information based on local VSMP authority
approval. At this time, the DEQ portion of the application fees will need to be paid directly to the state. For fastest
processing, this is done electronically with the emails provided on the application. DEQ should notify applicants
with instructions on how to pay fees. When DEQ approves the application, they will issue a permit coverage letter.
This should be copied to the county.
After DEQ coverage is issued, via the coverage letter, the County can hold a pre - construction conference. Applicants
will need to request a pre - construction conference by completing a form, and pay the remainder of the application
fee. The form identifies the contractor and responsible land disturber, and the fee remaining to be paid. This will be
checked by county staff, and upon approval, a pre - construction conference will be scheduled with the County
inspector. At the pre - construction conference, should everything proceed satisfactorily, a joint VSMP and grading
permit will be issued by the County so that work may begin.
County forms can be found on the county website forms center under engineering;
htt2://www.albemarle.oriz/deptforms.asp?departrnent--cdengMTo
Thank you /434.296 -5832 —0069
WPO201500055_Branchlands MemCare_VSMP_121515revl
pF A
vt�r�1Q
COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902 -4596
Phone (434) 296 -5832 Fax (434) 972 -4126
VSMP Permit plan review
Project: Branchland Whistler House —VSMP
Plat /Plan preparer: Craig Kotarski, Timmons Group
919 2' St. SE, Charlottesville, VA 22902 craig.kotarski(ctimmons.com
Owner: Wial LLC, 12095 Gayton Rd, Richmond, VA 23238 [Graham Aldelman]
Owner Rep: L. J. Lopez, Milestone Partners, 300 2nd St. NE, Charlottesville, VA 22920
llopezkmilestonepartners.com
Plan received date: 24 Aug 2015 / e -plans
Date of comments: 8 Oct 2015 / e- review
Reviewer: John Anderson
A. Stormwater Pollution Prevention Plan (SWPPP)
The SWPPP content requirements can be found in County Code section 17 -405. A SWPPP must contain (1)
a PPP, (2) an ESCP, (3) a SWMP, and (4) any TMDL measures necessary.
Comments reference binder dated 22 -Jun 2015 — Recommend do not re- submit SWPPP until ESC /SWM plan
comments addressed. SWPPP contains reduced -size ESC and SWM plans.
1. Sec. 1, Registration Statement — please sign/date.
2. Sec. 4,5 — Revise per comments. Recommend wait until ESCP /SWMP comments addressed.
3. Sec. 6 — Revise 11" x 17" PPP Exhibit: Relocate mortar mix/concrete washout so distant from future
bioretention. Describe berm containment: impermeable heavy -mil linerNolume sufficient to contain stored
fuel volume +10 %. Show solvent /paint/chemical storage. Add SF or similar downslope of temporary
toilets. Show non - hazardous solid waste collection (dumpster) draining to ST, or equivalent. Show
sediment basin or equivalent to capture wash waters.
4. Sec. 6.c. — Delete `No concrete washout shall occur on site.'
5. Sec. 6.c. — Delete `Existing basketball court to the north.'
6. Sec. 9 — Certification Statement: sign/date.
B. VSMP: SWPPP: Stormwater Management Plan (WP0201500055)
VSMP Regulation 9VAC25- 870 -108 requires the VSMP authority to approve or disapprove a SWMP. This plan is
disapproved for reasons provided in comments below. The stormwater management plan content requirements can be
found in County Code section 17 -403
1. C0.0 — Revise Title: Branchlands Memory Care and Assisted Living, VSMP WPO201500055
2. Remove sheets C1.0, C1.1, L -001. Please mark through sheet numbers in index.
3. C3.1 — Revise IP @ Nyoplast overflow structure. Bioretention may not be installed until all upslope areas
are stabilized. IP will not be required for bioretention overflow structure.
4. C4.0/4.1 — Revise sheet titles to `Site Layout' or similar. A VSMP may not approve a site plan.
5. C0.0 —Edit index. Ref. item #4.
6. C4.1 —Label pipe structure #105.
7. C4.1 —Label DI structure #108.
Engineering Review Comments
Page 2 of 5
8. C4.1 - Revise bottom of bioretention label to read floor elevation (or grade elevation) of bioretention.
9. C4.1 -Label bioretention clean -out. Label bioretention overflow structure.
10. LD -229: Storm Sewer Design Computations -in this (or separate table) list pipe structures # 109, 107.
11. C6.0 -Pipe Str. # 109 (6.83' of 15" HDPE), 107 (22.74' of 15" HDPE) @ 0.00% slope is problematic.
Revise to provide positive slope at least 0.5 %.
12. C4.1 -There appears to be no MH access to either ADS "Stormtech" System (Area to W), or 3 -line, 125' L
60" DIA storage system (Area to S). Provide manway access to each system.
13. C4.1 - Provide notes, labels, or detail that shows how the two 50' lines of ADS system make connection,
with particular emphasis on Access for maintenance. Ensure that each line is accessible. Provide same for
60" DIA, 125' L detention system (Area to S). All detention system lines must be accessible. Design
should ensure debris accumulation will not block, back -up, or short- circuit either system.
14. C4.1 - Provide new Str. #104 away from biofilter; use Std. MH. The biofilter 24" Nyoplast overflow
structure (dome drain) will be upstream of this MH. The Nyoplast structure is ineligible as an inline storm
system element. Organic debris is likely to collect at the base of the overflow structure. Any obstruction of
the 24" (dome drain) overflow structure will compromise the entire Area to W storm runoff system.
15. C5.1 - Recommend revise elevation of 4" perforated underdrain to 424.33' (biofilter).
16. C5.0 or C5.1 -Add Note: Bioretention may not be installed until all upslope areas are stabilized. IP will not
be required for bioretention overflow structure.
17. C5.0 or C5.1 - Provide bioretention planting schedule.
18. C5.1 - Revise `bottom of biofilter 427.50' to read top of biofilter Mix.
19. C5.1 -Label elevation/top of biofilter cleanout: set Elev. at least 4 -6" above 3" hardwood bark mulch.
20. C5.1 -Label %slope of line between biofilter overflow structure and new MH (2% Min). Also, items #14,
29.
21. C5.1 - Provide plan view, Str. #106. Plan view /design must provide means of clearing pipe #107 of debris.
22. C5.1 -WEIR Plate in Str. 106 Detail -Show top of structure (top of weir /top of storage are shown). C6.0
shows Str. 106: MH -1 W/ WEIR PLATE, TOP = 430.04'.
23. C6.0 -Pipe #207, 205: Increase DIA to 15" Min. (Yard inlet system 12" DIA, is the exception).
24. Revise LD -229 to reflect pipe DIA increase, item #23.
25. C4.IIC6.0 -It is unclear how Str. 112, listed as MH -1, functions. Str. is located in parking area that routes
to UG Detention, but is not identified as a grate or DI. Confirm design; revise profile label as necessary.
26. C6.0 -Str 204 -218 profile: Revise label to read INV IN 435.00 (213)
PROP.
GRADE
204: 60" CMP STORAGE PIPE
TOP ELEV. 436.50
BOTTOM ELEV. 431.50
INV IN 435.00 (215)
2w1 OF
?1� �6 COQ 4�
57 6HA- Cpl, °
GROUND
-213
8.63' OF ti 4:
12" HDPE \
@ 2.32%
27. Revise Str. 213 DIA to 15" Min; this leads from a standard VDOT DI to the 3 -line 60" DIA UG Detention
system.
28. C6.0 - Profile, Str. 200 -204: Label horizontal separation between steel plate weir wall and end wall of 60"
CMP storage pipe. Consider maintenance, and design reasonable access to this space. With 1.0' Max
Engineering Review Comments
Page 3 of 5
clearance above the weir plate (rapidly diminishes since circular), it is likely not possiblc to access the
downstream side of the weir plate in the 60" system, should need arise.
29. C6.0 - Revise profile, Str. 100 -110. Provide Std. MH. Ref. item #14, above.
30. C6.0 - Provide profile for line from biofilter overflow structure to New MH. -Also, item #29
31. C5.1 - Revise WEIR Plate in 60" System Detail. Show as circular (plate is circular).
32. Provide documentation of purchase of nutrient credits:
E. Documentation of the applicant's acquisition of nutrient credits shall be provided to the VSMP authority and
the Department in a certification from the credit provider documenting the number of phosphorus nutrient
credits acquired and the associated ratio of nitrogen nutrient credits at the credit - generating entity. Until the
effective date of regulations establishing application fees in accordance with § 62.1- 44.19:20, the credit
provider shall pay the Department a water quality enhancement fee equal to six percent of the amount paid by
the applicant for the credits. Such fee shall be deposited into the Virginia Stormwater Management Fund
established by § 62.1 - 44.15:29.
C. VSMP: SWPPP: Erosion Control Plan (WP0201500055)
Virginia Code §62.1- 44.15:55 requires the VESCP authority to approve or disapprove an ESCP. This plan is disapproved
for reasons provided in comments below. The erosion control plan content requirements can be found in County Code
section 17 -402.
1. C3.0 - Sediment trap design Elev. vs wet/dry storage -If table presents Vol. per P vertical interval, please
clarify. It appears, for example, that Elev. 423.7' provides <43.4 cy storage, when it may provide < 80.4
cy. Please Add note or revise volume(cy) heading to indicate incremental storage ( /1' interval). Revise
values as necessary.
2. C3.1 - Revise ESC Legend, soil stabilization blanket =BM.
3. C3.1 -Label floor of sediment trap, plan view (16' x 52')
4. C3.1 - Provide vegetative cover hardier than grass for proposed 2:1 slopes along SW edge of building.
(ACDSM 8.A.2.); Ref. Phase II.
5. C3.1 /C5.1 - Specify material (Elev. 421' to 424') to replace excavated material beneath bioretention since
C3.1 stipulates removal to Elev. 421.00'.
Sediment Trap design
drainage area (acres) ( <3)
0.91
trap volumes:
CREST OF STONE WEIR
p"'BLE"
elevation (ft) area (sf)
.ulume(cy)
N0
ILI
422 859
423 1139
370
ORYSTORAGE
t Yv vnF
424 1203
43.4
425 1385
47 9
426 1573
wEr STORAGE
(F%GV FID)
nhR aorN cRaiao
wet storage:
ILI
1
cmRSC wwccn*s� clus c Rrwa
wet storage required (cy) (67TDA)
61 0
bottom of stone weir (ft)
4237
wet storage provided at this elevation (cy)
63.0
. "coarse aggregate shall
be VDOT #3, #357 of #5
slope of wet storage sides
1:1
weir length (ft) (6x DA)
15.0
dry storage:
bottom of trap elevation (ft)
422
dry storage required (cy) (67'DA)
61.0
bottom trap dimensions:
1052'
crest of stone weir
425.0
top of dam elevation (ft)
426
dry storage provided at this elevation (cy)
61.0
top width of dam (ft)
2
slope of dry storage sides
1:1
top trap dimensions
185176'
2. C3.1 - Revise ESC Legend, soil stabilization blanket =BM.
3. C3.1 -Label floor of sediment trap, plan view (16' x 52')
4. C3.1 - Provide vegetative cover hardier than grass for proposed 2:1 slopes along SW edge of building.
(ACDSM 8.A.2.); Ref. Phase II.
5. C3.1 /C5.1 - Specify material (Elev. 421' to 424') to replace excavated material beneath bioretention since
C3.1 stipulates removal to Elev. 421.00'.
Engineering Review Comments
Page 4of5
EXCAVATE AND REMOVE SOIL TQ AN,
ELEVATION OF 421.00 IN ALL AREAS
WHERE SEDIMENT TRAP FOOTPRINT
OVERLAPS BIORET ENTION
FOOTPRINT BEFORE..INSTALLING
BI ORETE�ITJQN
, � MU ,
ITS aF ' A f ,
CLEAPM,G cj PS
Al D G AIDING
/03 � ,
6. Show soil stockpile location, if any.
Engineering plan review staff are available from 2 -4 PM on Thursdays, should you require a meeting to discuss this
review. Plan review staff are also available at 434 - 296 -5832 (- x3069) should you have questions.
Process:
After approval, plans will need to be bonded. The bonding process is begun by submitting a bond estimate request
form and fee to the Department of Community Development. One of the plan reviewers will prepare estimates and
check parcel and easement information based on the approved plans. The County's Management Analyst will
prepare bond agreement forms, which will need to be completed by the owner and submitted along with cash,
certificates or sureties for the amounts specified. The agreements will need to be approved and signed by the County
Attorney and County Engineer. This may take 2 -4 weeks to obtain all the correct signatures and forms.
Stormwater Management Facilities Maintenance agreements will also need to be completed and recorded. The
County's Management Analyst or other staff will prepare the forms and check for ownership and signature
information. The completed forms will need to be submitted along with court recording fees.
After bonding and agreements are complete, county staff will need to enter project information in a DEQ database
for state application processing. DEQ will review the application information based on local VSMP authority
approval. At this time, the DEQ portion of the application fees will need to be paid directly to the state. For fastest
processing, this is done electronically with the emails provided on the application. DEQ should notify applicants
with instructions on how to pay fees. When DEQ approves the application, they will issue a permit coverage letter.
This should be copied to the county.
After DEQ coverage is issued, via the coverage letter, the County can hold a pre - construction conference. Applicants
will need to request a pre - construction conference by completing a form, and pay the remainder of the application
fee. The form identifies the contractor and responsible land disturber, and the fee remaining to be paid. This will be
checked by county staff, and upon approval, a pre - construction conference will be scheduled with the County
inspector. At the pre - construction conference, should everything proceed satisfactorily, a joint VSMP and grading
permit will be issued by the County so that work may begin.
County forms can be found on the county website forms center under engineering;
http://www.albemarle.org/deptforins.asp?department=cdengmTo
Thank you /434.296 -5832 —x3069
Engineering Review Comments
Page 5 of 5
WPO201500055_Branchlands MemCare_VSMP_100815