HomeMy WebLinkAboutWPO201700078 Review Comments WPO VSMP 2018-03-15COUNTY 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 title: Western Albemarle High School Science Lab
Project file number: WP0201700078
Plan preparer: Timmons Group, Craig Kotarski [craig.kotarski@timmons.com]
Owner or rep.: Alb County School Board, Joe Letteri [jletteri@K12albemarle.org]
Plan received date: 02 December 2017
22 February 2018 (Rev. 1)
Date of comments: 08 January 2018
15 March 2018 (Rev. 1)
Reviewer: Bobby Jocz
WW Associates, Inc. (Rev. 1)
County Code section 17-410 and Virginia Code §62.1-44.15:34 requires the VSMP authority to
act on any VSMP permit by issuing a project approval or denial. This project is denied. The
rationale is given in the comments below. The application may be resubmitted for approval if all
of the items below are satisfactorily addressed. The VSMP application content requirements can
be found in County Code section 17-401.
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.
1. Signed Copy of registration statement will be required with final submittal.
(Rev. 1) Response: A Division (Diversion?) Dike detail has been added to the plans. See
sheet C3.
(Rev. 1) Comment: Comment not addressed. It appears that consultant addressed a
comment as follows: Plans call for a clean water diversion, however, a detail is not provided
on the plans. If you plan to use the diversion detail in the plans or both, please clarify or
revise.
2. Provide WPO number on coversheet of plan sets, and the front cover of calculations Packet.
(Rev. 1) Comment addressed. Requested information added to plan.
B. Pollution Prevention Plan (PPP)
The PPP content requirements can be found in County Code section 17-404.
1. One of the provided SWPPP copies is missing the end of section 6, and sections 7-12. Please
provide updated SWPPP.
(Rev. 1) Comment partially addressed. Section 9 is to be signed and dated by Mr. Joseph P.
Letteri. Section 10 Delegation of Authority is to be executed.
2. Include WPO number on front cover of SWPPP copies.
(Rev. 1) Comment addressed. Requested information added.
3. Copy of GCP and blank inspection logs should be provided in final SWPPP copy submittal.
Engineering Review Comments
Page 2 of 4
(Rev. 1) Comment addressed. Requested information added.
C. Stormwater Management Plan (SWMP)
VSMP Regulation 9VAC25-870-108 requires the VSMP authority to approve or disapprove a
SWMP. This plan is disapproved, and the reasons are provided in the comments below. The
stormwater management plan content requirements can be found in County Code section 17-403.
1. [C4.0] Weir designs not provided in landscaping plan as indicated. Weir design should be
provided in stormwater details along with dry swale design detail. Ensure all weir seizes are
dimensioned consistently (Wide, high, deep, long, are identified unclearly between dimensions).
Indicate weir notch shape (rectangular, trapezoidal, etc.).
(Rev. 1) Comment addressed. Weir/dry swale design deleted and replaced with a small pond
with permanent pool. Pond facility for ESC program and not for SWM.
2. [C5.0] No detail is provided for rock channel with check dams as indicated. Please provide detail
in stormsewer details section.
(Rev. 1) Comment addressed. Rock channel with check dam deleted from plan.
3. [C5.2] Table or annotations should be provided presenting overview of pipe and inlet sizes/types.
This should include both proposed and existing pipes/inlets utilized in final site conditions.
(Rev. 1) Comment addressed. Requested information has been added to plan.
4. [C7.0] Provide longitudinal cross section detail of dry swale design from concrete flume to end of
dry swale. Ensure current perpendicular cross section detail of dry swale includes all elements
including underdrain, weir cross section, pre-treatment cell, etc. (diagram indicates the existence
of underdrain, but does not detail). Include elevations.
(Rev. 1) Comment addressed. Dry swale removed from plan.
5. [C7.0] Detail should be provided for drainage ditches shown directing flow towards inlet 112. In
addition, channel flow calculations should be included.
(Rev. 1) Comment partially addressed. Swale drainage flow arrows provided, however,
swale sections and calculations not provided. Provide swale sections and calculations
demonstrating that 2 -year storm velocity is non-erosive and that 10 -year storm depth is
contained within the swale/channel.
6. [C7.0] Include details for all stormsewer structures utilized in the project (ex. MH -1).
(Rev. 1) Comment addressed. Requested information has been added to the plan.
7. [L2.0] Greater detail must be provided for "flow through planters". What elevation are
drains/"risers" to be located at in relation to the top of the media? Where do drainage pipes flow
through planters? Are gravel areas at same elevation as planter sections? What type of gravel is to
be used over drain areas? Do planters detain water/is there staging (should be included in
calculations if so)? Cross section of planter does not match detail.
(Rev. 1) Comment addressed. Flow through planters deleted and replaced with VDOT
standard storm drain structures.
8. [Calculations Packet] It is unclear how courtyard area is incorporated into LD -229 analysis,
please provide clarification.
(Rev. 1) Comment addressed. LD -229 form complete to outfalls at existing structures EX -10
and EX -1.
9. [Calculations Packet] It does not appear drainage from RD -2 is incorporated into the LD -229
analysis for inlet 124. Please correct/clarify.
(Rev. 1) Comment addressed. Storm drain pipe calculations revised to include roof drain
areas.
10. [Calculations Packet] Stormsewer calculations, profiles, and analysis should include existing
pipes. It is unclear due to design/analysis that current pipes downstream of system modifications
will accommodate proposed flows.
Engineering Review Comments
Page 3 of 4
(Rev. 1) Comment addressed. Profiles and calculations demonstrate that existing system is
adequate.
11. [Calculations Packet] VRRM spreadsheet indicates 0.04ac of forest and open space are to be
conserved to partly address water quality requirements. Please indicate location of forest and
open space areas. Note: Forest and open space areas must be placed into conservation easement
for credit for stormwater quality improvements. F&OS must also conform to maintenance
requirements set forth through VSMP program.
(Rev. 1) Comment addressed. Forest and open space deleted from VRRM spreadsheet.
SWM quantity and quality controls still met.
12. [Calculations Packet] Stormsewer profiles indicate structure EX -1 as a MH -1 despite including it
in the drainage calculations as a stormsewer inlet. Please clarify structure type.
(Rev. 1) Comment addressed. Plans and calculations corrected. Structure EX -1 is an
energy dissipation type outfall structure.
13. [General] Side slopes of grass swale are measured as 3:1 on plan views, but indicated as 4:1 on
detail. Please clarify.
(Rev. 1) Comment addressed. Grass swale deleted from plan.
D. Erosion and Sediment Control Plan (ESCP)
Virginia Code §62.1-44.15:55 requires the VESCP authority to approve or disapprove an ESCP.
This plan is approved, and the reasons are provided in the comments below. The erosion control
plan content requirements can be found in County Code section 17-402.
1. Include the excavated drop inlet sediment trap in the E&S narrative under the structural practices
section.
(Rev. 1) Comment addressed. Requested information has been added to the plan.
2. Maintenance details for each practice should be provided for E&S measures on the plans, or
within SWPPP.
(Rev. 1) Comment addressed. ESC maintenance information has been added as requested.
3. CE should be better located to prevent site access that bypasses CE
(Rev. 1) Comment addressed. CE location shown on sheet C3.1 is functional.
The VSMP permit application and all plans may be resubmitted for approval when all comments have
been satisfactorily addressed. For re -submittals please provide 2 copies of the complete permit package
with a completed application form.
Engineering plan review staff are available from 2-4 PM on Thursdays, should you require a meeting to
discuss this review.
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.
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
Engineering Review Comments
Page 4 of 4
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 complete the request for a pre -construction conference 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/deptforyns.asp?department--cdengMo
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 title: Western Albemarle High School Science Lab
Project file number: WP0201700078
Plan preparer: Craig Kotarski [craig.kotarski@timmons.com]
Owner or rep.: Alb County School Board, Joe Letteri bletteri@K12albemarle.org]
Plan received date: 2nd December, 2017
Date of comments: 8`1 January, 2018
Reviewers: Bobby Jocz
County Code section 17-410 and Virginia Code §62.1-44.15:34 requires the VSMP authority to
act on any VSMP permit by issuing a project approval or denial. This project is denied. The
rationale is given in the comments below. The application may be resubmitted for approval if all
of the items below are satisfactorily addressed. The VSMP application content requirements can
be found in County Code section 17-401.
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.
1. Signed Copy of registration statement will be required with final submittal.
2. Provide WPO number on coversheet of plan sets, and the front cover of calculations Packet.
B. Pollution Prevention Plan (PPP)
The PPP content requirements can be found in County Code section 17-404.
1. One of the provided SWPPP copies is missing the end of section 6, and sections 7-12. Please
provide updated SWPPP.
2. Include WPO number on front cover of SWPPP copies.
3. Copy of GCP and blank inspection logs should be provided in final SWPPP copy submittal.
C. Stormwater Management Plan (SWMP)
VSMP Regulation 9VAC25-870-108 requires the VSMP authority to approve or disapprove a
SWMP. This plan is disapproved, and the reasons are provided in the comments below. The
stormwater management plan content requirements can be found in County Code section 17-403.
1. [C4.0] Weir designs not provided in landscaping plan as indicated. Weir design should be
provided in stormwater details along with dry swale design detail. Ensure all weir seizes are
dimensioned consistently (Wide, high, deep, long, are identified unclearly between dimensions).
Indicate weir notch shape (rectangular, trapezoidal, etc.).
2. [C5.0] No detail is provided for rock channel with check dams as indicated. Please provide detail
in stormsewer details section.
3. [C5.2] Table or annotations should be provided presenting overview of pipe and inlet sizes/types.
Engineering Review Comments
Page 2 of 3
This should include both proposed and existing pipes/inlets utilized in final site conditions.
4. [C7.0] Provide longitudinal cross section detail of dry swale design from concrete flume to end of
dry swale. Ensure current perpendicular cross section detail of dry swale includes all elements
including underdrain, weir cross section, pre-treatment cell, etc. (diagram indicates the existence of
underdrain, but does not detail). Include elevations.
5. [C7.0] Detail should be provided for drainage ditches shown directing flow towards inlet 112. In
addition, channel flow calculations should be included.
6. [C7.0] Include details for all stormsewer structures utilized in the project (ex. MH -1).
7. [L2.0] Greater detail must be provided for "flow through planters". What elevation are
drains/"risers" to be located at in relation to the top of the media? Where do drainage pipes flow
through planters? Are gravel areas at same elevation as planter sections? What type of gravel is to
be used over drain areas? Do planters detain water/is there staging (should be included in
calculations if so)? Cross section of planter does not match detail.
8. [Calculations Packet] It is unclear how courtyard area is incorporated into LD -229 analysis, please
provide clarification.
9. [Calculations Packet] It does not appear drainage from RD -2 is incorporated into the LD -229
analysis for inlet 124. Please correct/clarify.
10. [Calculations Packet] Stormsewer calculations, profiles, and analysis should include existing
pipes. It is unclear due to design/analysis that current pipes downstream of system modifications
will accommodate proposed flows.
11. [Calculations Packet] VRRM spreadsheet indicates 0.04ac of forest and open space are to be
conserved to partly address water quality requirements. Please indicate location of forest and open
space areas. Note: Forest and open space areas must be placed into conservation easement for
credit for stormwater quality improvements. F&OS must also conform to maintenance
requirements set forth through VSMP program.
12. [Calculations Packet] Stormsewer profiles indicate structure EX -1 as a MH -1 despite including it
in the drainage calculations as a stormsewer inlet. Please clarify structure type.
13. [General] Side slopes of grass swale are measured as 3:1 on plan views, but indicated as 4:1 on
detail. Please clarify.
D. Erosion and Sediment Control Plan (ESCP)
Virginia Code §62.1-44.15:55 requires the VESCP authority to approve or disapprove an ESCP.
This plan is disapproved, and the reasons are provided in the comments below. The erosion control
plan content requirements can be found in County Code section 17-402.
1. Include the excavated drop inlet sediment trap in the E&S narrative under the structural practices
section.
2. Maintenance details for each practice should be provided for E&S measures on the plans, or
within SWPPP.
3. CE should be better located to prevent site access that bypasses CE.
The VSMP permit application and all plans may be resubmitted for approval when all comments have
been satisfactorily addressed. For re -submittals please provide 2 copies of the complete permit package
with a completed application form.
Engineering plan review staff are available from 2-4 PM on Thursdays, should you require a meeting to
discuss this review.
Engineering Review Comments
Page 3 of 3
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 complete the request for a pre -construction conference 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/deptforms.asp?department--cdengno
Bobby Jocz
Albemarle County
Community Development — Engineering
rjocz@albemarle.org
(434) 296-5832 ext. 3283
• **
e
608 Preston Avenue P 434.295.5624
TI M M O N S GROUP Suite 200 F 434.295.8317
YOUR VISION ACHIEVED THROUGH OURS. Charlottesville, VA 22903 www.timmons.com
April 5, 2018
Bobby Jocz
County of Albemarle
401 McIntire Rd
Charlottesville, VA 22902-4596
RE: Western Albemarle Science Lab — Plan Review—WPO201700078 - Comment
Response Letter
Dear Mr.Jocz:
We have reviewed all of your comments from March 15, 2018 and made the necessary
revisions. Please find our responses to the comments below in bold lettering.
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.
I. Signed Copy of registration statement will be required with final submittal.
(Rev. I) Response: A Division (Diversion?) Dike detail has been added to the plans.
(Rev.I) Comment: Comment not addressed. It appears that consultant addressed a
comment as follows: Plans call for a clean water diversion, however, a detail is not
provided on the plans. If you plan to use the diversion detail in the plans or both, please
clarify or revise.
A regular division dike detail has been included on sheet C3.0. Clean water divisions
are not being used and detail is not necessary. A signed copy of the registration
statement has been included with this submission.
2.
B. Pollution Prevention Plan (PPP):
The PPP content requirement can be found in County Code section 17-404.
1
CIVIL ENGINEERING I ENVIRONMENTAL I SURVEYING I GIS I LANDSCAPE ARCHITECTURE I CONSTRUCTION SERVICES
1
I. One of the provided SWPPP copies is missing the end of section 6, and sections 7-12.
Please provide updated SWPPP.
(Rev.I) Comment partially addressed. Section 9 is to be signed and dated by Mr.Joseph
P. Letteri. Section 10 Delegation of Authority is to be executed.
Signed page has been included with this resubmission.
2. Include WPO number on front cover of SWPPP copies.
(Rev. I) Commend addressed. Requested information added.
Acknowledged.
3. Copy of GCP and blank inspection logs should be provided in final SWPPP copy
submittal.
(Rev. I) Comment addressed. Requested information added.
Acknowledged.
C. Stormwater Management Plan (SWMP):
VSMP Regulation 9VAC25-870-108 requires the VSMP authority to approve or disapprove a
SWMP. This plan is disapproved, and the reasons are provided in the comments below.
The Stormwater management plan content requirements can be found in County Code
Section 17-403.
I. [C4.0] Weir designs not provided in landscaping plan as indicated. Weir design should be
provided in Stormwater details along with dry swale design detail. Ensure all weir seizes
are dimensioned consistently (Wide, high, deep, long, are identified unclearly between
dimensions). Indicate weir notch shape (rectangular, trapezoidal, etc.).
(Rev. I) Comment addressed. Weir/dry swale design deleted and replaced with a small
pond with permanent pool. Pond facility for ESC program and for SWM.
Acknowledged.
2. [C5.0] No detail is provided for rock channel with check dams as indicated. Please
provide detail in Stormsewer details section.
(Rev. I) Comment addressed. Rock channel with check dam deleted from plan.
Acknowledged.
3. [C5.2] Table or annotations should be provided presenting overview of pipe and inlet
sizes/types. This should include both proposed and existing pipes/inlets utilized in final
site conditions.
(Rev. I) Comment addressed. Requested information has been added to plan.
Acknowledged.
4. [C7.0] Provide longitudinal cross section detail of dry swale design from concrete flume
to end of dry swale. Ensure current perpendicular cross section detail of dry swale
includes all elements including underdrain, weir cross section, pre-treatment cell, etc.
(diagram indicates all existence of underdrain, but does not detail). Include elevations.
(Rev. I) Comment addressed. Dry swale removed from plan.
Acknowledged.
5. [C7.0] Detail should be provided for drainage ditches shown directing flow towards inlet
112. In addition, channel flow calculations should be included.
[Rev. I] Comment partially addressed. Swale drainage flow arrows provided, however,
swale sections and calculations not provided. Provide swale sections and calculations
demonstrating that 2-year storm velocity is non-erosive and that I 0-year storm depth is
contained within the swale/channel.
Swale section and calculations have been added to sheet C5.2
6. [C7.0] Include details for all Stormsewer structures utilized in the project (ex. MH-I).
(Rev. I) Comment addressed. Requested information has been added to the plan.
Acknowledged.
7. [L2.0] Greater detail must be provided for "flow through planters". What elevation are
drains/ "risers" to be located at in relation to the top of the media? Where do drainage
pipes flow through planters?Are gravel areas at same elevation as planter sections? What
type of gravel is to be used over drain areas? Do planters detain water/is there staging
(should be included in calculations if so)? Cross section of planter does not match detail.
(Rev. I) Comment addressed. Flow through planters deleted and replaced with VDOT
standard storm drain structures.
Acknowledged.
8. [Calculations Packet] It is unclear how courtyard area is incorporated into LD-229
analysis, please provide clarification.
(Rev. I) Comment addressed. LD-229 form complete to outfalls at existing structures
EX-I 0 and EX-I.
Acknowledged.
9. [Calculations Packet] It does not appear drainage from RD-2 is incorporated into the LD-
229 analysis for inlet 124. Please correct/clarify.
(Rev. I) Comment addressed. Storm drain pipe calculations revised to include roof drain
areas.
Acknowledged.
10. [Calculations Packet] Stormsewer calculations, profiles, and analysis should include
existing pipes. It is unclear due to design/analysis that current pipes downstream of
system modifications will accommodate proposed flows.
(Rev. I) Comment addressed. Profiles and calculations demonstrate that existing system
is adequate.
Acknowledged.
I.[Calculations Packet] VRRM spreadsheet indicates 0.04ac of forest and open space are to
be conserved to partly address water quality requirements. Please indicate location of
forest and open space areas. Note: Forest and open space areas must be placed into
conservation easement for credit for Stormwater quality improvements. F&OS must
also conform to maintenance requirements set forth through VSMP program.
(Rev. I) Comment addressed. Forest and open space deleted from VRRM spreadsheet.
SWM quantity and quality controls still met.
Acknowledged.
12.[Calculations Packet] Stormsewer profiles indicate structure EX-I as a MH-I despite
including it in the drainage calculations as a Stormsewer inlet. Please clarify structure
type.
(Rev.I) Comment addressed. Plans and calculations corrected. Structure EX-I is an
energy dissipation type outfall structure.
Acknowledged.
13.[General] Side slopes of grass swale are measured as 3:I on plan views, but indicated as
4:I on detail. Please clarify.
(Rev. I) Comment addressed. Grass swale deleted from plan.
Acknowledged.
D. Erosion and Sediment Control Plan (ESCP):
Virginia Code 62.1-44.15:55 requires the VESCP authority to approve or disapprove an
ESCP. This plan is approved, and the reasons are provided in the comments below. The
erosion control plan content requirements can be found in County Code section 17-402.
I. Include the excavated drop inlet sediment trap in the E&S narrative under the structural
practices section.
(Rev. I) Comment addressed. Requested information has been added to the plan.
Acknowledged.
2. Maintenance details for each practice should be provided for E&S measures on the plans,
or within SWPPP.
(Rev. I) Comment addressed. ESC maintenance information has been added as
requested.
Acknowledged.
3. CE should be better located to prevent site access that bypasses CE.
(Rev. I) Comment addressed. CE location shown on sheet C3.I is functional.
Acknowledged.
We have included 2 copies of the plans and calculations for your review. If you have any
questions or comments, please feel free to give me a call at 434.295.5624.
Sincerely,
Jonathan Showalter
Project Engineer