HomeMy WebLinkAboutWPO201800001 Review Comments 2018-06-07 !pm*
BLACKWELL ENGINEERING, PLC
I i' 566 E.MARKET ST. • HARRISONBURG,VIRGINIA 22801 • (540)432-9555 • FAX(540)434-7604
June 7, 2018 BE#2346
John Anderson, Senior Planner
Albemarle County—Department of Community Development
401 McIntire Road
Charlottesville, VA 22902
Subject: WP0201800001 Rivanna Community Church
Dear John,
The following are in response to your review comments dated January 24th, 2018.
Stormwater Pollution Prevention Plan (SWPPP)
1. [Sheet 1] Provide WPO application number(WP0201800001)on front page
WPO number is added to front page
2. [Sheet 1] Remove signature block from front page.
Signature block removed
3.Topography should be field verified by designer within the past year. Please provide date of field
verification within the previous 12 months.
Sites been field verified on May 31, 2018. Notes been added to Sheet 2.
4. [Sheet 1] Ensure only existing conditions/elevations are included.Currently,elevation callouts are
included from proposed conditions in certain locations.
Proposed conditions are no longer shown on the existing conditions
5. [Sheet 2]Show proposed SWM facility easement and stormwater management access easement.
Easements and labels added onto Sheet 2.
6. [Sheet 2] Ensure entire LOD is provided for SWM facility dam modification. It appears the LOD is cut off
by critical slopes layer.
Pond berm to no longer be disturbed. LOD is shown more clearly.
7. [SWPPP] NOTE:Since the project is less than 1 acre, no DEQ permit is required(although adherence to
County Code and VSMP is still required).Sections 1,2,and 11 of the SWPPP are not needed.
Acknowledged
8. [SWPPP]Sections 7,8,9,and 10 will need to be completed prior to final WPO approval.
Acknowledged
9. [SWPPP] Copies of the stormwater management and erosion and sediment control plans must be
provided in the SWPPP before final approval. If to be included as attachment,please make note in the
appropriate section.
Plans are attached to SWPPP
CIVIL ENGINEERS SPECIALIZING IN LAND DEVELOPMENT,ENVIRONMENTAL NEEDS AND
CONSTRUCTION MANAGEMENT SERVING COMMERCIAL,INDUSTRIAL AND MUNICIPAL CLIENTS
B. Pollution Prevention Plan (PPP)
1. Provide exhibit showing proposed locations of concrete washout and other construction support
equipment(dumpsters, porta johns,fueling locations,etc). Locations provided in exhibit do not need to
be final locations.SWPPP will be modified in field during construction.
Exhibit provided with the SWPPP
2.Sections E, F,and G must be completed prior to final approval.Section E, regarding who is responsible
for pollution prevention practices can be changed once the project starts,through modification of the
SWPPP document.
Sections E, F, and G shall be filled out.
C. Stormwater Management Plan (SWMP)
1. Dam and riser modification details should be provided in WPO plan submittal.
Existing pond to remain as is, so any pond related notes removed from WPO.
2. Replacement roadside ditch detail should be provided in WPO plan submittal.
Roadside ditch profile and detail provided on Sheet 5.
3. Recommend using casing for section of stormsewer proposed to run under building.Would enable
changing/repair of pipe if necessary.
Reassess casing later after approval.
4.Water quality compliance requirements under 9VAC25-870-63 are not met. Please show compliance
with water quality criteria.VRRM spreadsheet showing water quality compliance should be provided.
VRRM spreadsheet provided. Note added to Sheet 4.
5. Embankment modifications insufficient.Top width should be a minimum of 8ft wide.Added soil should
be compacted fill.
Existing pond to remain as is, so any pond related modifications removed from WPO.
6. Provide greater detail on how stormwater is to drain from new parking lot area at the southwest of the
site. It appears a curb cut is to be used?If so provide level spreader to ensure water is discharged in
sheet flow condition.
Outlet protection to be sufficient for parking lot. Water is
D. Erosion and Sediment Control Plan (ESCP)
1. Provide detail for blanket matting(VESCH 3.36)
Blanket and Matting Detail provided on Sheet 5
2. Provide detail for Paved wash rack(see County Design standards manual Chapter 3)
Paved Wash Rack detail provided on Sheet 5
3. Provide detail for inlet protection to be used on drop inlets(VESCH 3.07).Suggest block and gravel or
silt fence drop inlet protection.
Inlet Protection detail provided on Sheet 5
4. Provide detail for construction road stabilization.
Construction road stabilization detail provided on Sheet 5
Please call me if you have any questions or require additional information.
Cordially,
)'1/. adiVA ) //140770._
N. Asher Knopp
E.I.T.
Attachment: Draft SWM easement plat
Cc: Scott Knight,Pastor-Rivanna Community Church