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HomeMy WebLinkAboutWPO201600001 Review Comments WPO VSMP 2017-06-20 • • 14410✓ of A ter* 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: Briarwood Ph. lA-1, 1B-1,4& 5 VSMP Amendment Project file number: WP0201600001 Plan preparer: Collins Engineering [scott@collins-engineering.com] Owner or rep.: Woodbriar Associates Date Received: 13 Jan 2016 (Rev. 1) 29 Jun 2016 (Rev. 2) 5 Jun 2017 (Rev. 3) 19 Jun 2017 Date of comments: 8 Mar 2016 (Rev. 1) 2 Aug 2016 (Rev. 2) 13 Jun 2017 (Rev. 3) 20 Jun 2017 Reviewer: John Anderson (Rev. 2) Matt Wentland 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 approved. 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. The SWPPP appears to be acceptable at this time. B. Pollution Prevention Plan(PPP) The PPP content requirements can be found in County Code section 17-404. 1. The PPP appears to be acceptable at this time. C. Stormwater Management Plan(SWMP) VSMP Regulation 9VAC25-870-108 requires the VSMP authority to approve or disapprove a SWMP. This plan is approved,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. Per Planning comment on the Briarwood Phase 4&Phase 6 Final Subdivision Plat(SUB2016-185), the proffered trail will need to be shown on this amendment, including the grading: [ZMA2004-14 Application plan, Proffer 4] Prior to final plat approval the trail shall be built.Provide a trail plan exhibit which shall be used by the County to approve the design of the trail.The exhibit shall contain a cross-section of the trail,topography(elevation contours 50' on \.►' Engineering Review Comments Page 2 of 2 either side of the trail),and a plan view of the trail.Once the trail plan has been approved provide the above mentioned information on the amended WP0201600001 currently under review.Once approved please construct the trail and then request an inspection of the trail. (Rev.3)Comment addressed. 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. The ESC portion of the plan appears to be acceptable at this time. 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. 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=cdengwpo 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 title: Project file number: Plan preparer: Owner or rep.: Date Received: (Rev. 1) (Rev. 2) Date of comments: (Rev. 1) (Rev. 2) Reviewer: (Rev. 2) VSMP Permit plan review Briarwood Ph. IA -1, 1B-1, 4 & 5 VSMP Amendment WP0201600001 Collins Engineering [scott@collins-engineering.com] Woodbriar Associates 13 Jan 2016 29 Jun 2016 5 Jun 2017 8 Mar 2016 2 Aug 2016 13 Jun 2017 John Anderson Matt Wentland 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 ESOP, (3) a SWMP, and (4) any TMDL measures necessary. 1. The SWPPP appears to be acceptable at this time. B. Pollution Prevention Plan (PPP) The PPP content requirements can be found in County Code section 17-404. 1. The PPP appears to be acceptable at this time. 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. Per Planning comment on the Briarwood Phase 4 & Phase 6 Final Subdivision Plat (SUB2016-185), the proffered trail will need to be shown on this amendment, including the grading: i�IIuIIS111:�].1]G! I L! 1.1 t'C�]P r �, i' z •i i',� i i,otu i G! r if i C► • iil i .� .iii .� �i ►�A.] iii C►i.�l 61i % _•^. 1 ou'rA no x % rq 1% .J I' SEI I � � ILi 1►J11 141 611 .] t61'x Pg 1 x �r 1 l li'� 1� .] !j � 1 P15 1� 1 % f: � l' li 1� 15 llis s►'11_•^^,�C►61 F% •• fii.��i' .� yi ++ + •C►I i' ii iii C►i.�l � ii• �• i.��i'y;� ►�i.�iT i y i'C►• � i�+L�:1]° ��1�1 IC]I� �IiLg15looVrJo.]ir.]6.]I1'F151►J/ lil�l l�l.]�,:���IyN5 xrgI% .]f I%61 »1.]�!j1G1'F/xr �1s1'F/1^ Engineering Review Comments Page 2 of 2 ' ^ r ^ Irl r1 gnnnn ^ n_,r ra L� 15 .] 7 x 1►15 11 x i l� � x l' S! � 1'I i_� li I .] l� � � 1' � 1' L� 15 .] 11 � 1' � 5! ��1�� ���� �� ��i 1u�����i�����i I y x 11 � 1' l�'� x 1 � � 1 1 x1►I � 5P1►1,: ��� 1 y -6 -6 -1 a 1►15 l %rsulx lq l x H l -C %44 lq l x if 1 A! ,t x6IrI %-f � ifq6xOrNxof x,Ii rq I x H 1-C _ D. Erosion and Sediment Control Plan (ESOP) Virginia Code §62.1-44.15:55 requires the VESCP authority to approve or disapprove an ESOP. 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. The ESC portion of the plan appears to be acceptable at this time. 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. 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; ht!p://www.albemarle.org/dgptforrns.asp?dgpartment=cdenjzwpo File: WP0201600001 Briarwood Ph4 Amendment review comments rev2 06-13-17.doc 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: Briarwood Phase IA -1, 113-1, 4 &5 —VSMP/WPO Plan preparer: Scott Collins; Collins Engineering [200 Garrett St., Suite K Charlottesville, VA 22902, scott(cDcollins-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 Jan 2016 (Rev. 1) 29 Jun 2016 Date of comments: 8 Mar 2016 (Rev. 1) 2 Aug 2016 Reviewer: John Anderson -for En in�g E-mail /.PDF request); SWMP —Approved; E WP0201600001 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. Revise Overall SWPPP Mapping Exhibit (8/8/14; Attached) to cover primary recreational area. Holtzman Oil recently purchased parcel shown on the Mapping Exhibit. County has advised Holtzman to complete a Registration Statement and apply for independent VPDES permit. (Rev. 1) Partially addressed. Please email .PDF of Overall SWPPP Mapping Exhibit to fpohl(d,)albemarle.org and janderson2(&albemarle.org. If overlooked, please disregard, and accept apology. 2. Provide SWPPP Exhibit, typical of Collins Engineering projects. (Rev. 1) Addressed. As follow-up, please show concrete wash-out with Exhibit. It is unclear whether Ex. ST is designed or qualifies to serve as concrete wash-out. During inspections, DEQ focuses care and attention on concrete wash-out facilities. 3. Complete Attached General VPDES Permit Registration Statement. (Rev. 1) Addressed. 4. Revise Total Area of Development to include entire development, including primary recreational area. (Rev. 1) Acknowledged (ref. 6 -May 2016 Applicant response). Please note: primary recreational area, which does not have conceptual or prior reviewed plans as far as we're aware, is subject to Part IIB technical criteria (9VAC25-870-65). The major residential lot portion of this VSMP is subject to Part IIC, and review comments are constrained to minor requests, including transfer of SWM details from WP0200600066 to this plan. B. VSMP: SWPPP: Stormwater Management Plan (WP0201600001, Amendment to WP0200600066) VSMP Regulation 9VAC25-870-108 requires the VSMP authority to approve or disapprove a SWMP. This plan is approved. 1. Include Amendment to WP02006-00066 in Plan Title. (Rev. 1) Addressed. 2. Present site/subdivision details for primary recreational area, and Part IIB SWM design details for this area. (Rev. 1) Pending. 6 May 2016 Applicant response: "This comment is acknowledged and the applicant is investigating this." Engineering Review Comments Page 2 of 4 Sheet 1 3. Recommend reference WPO2006-00066 in Existing Vegetation Note. (Rev. 1) Addressed. 4. VSMP Plan Amendment Proposed Changes: Insert new 2nd sentence: "Pond #4 shape and design elevations have changed, see plan details. Also: Delete last sentence in this sheet 1 cloud revision note. (Rev. 1) Addressed. Sheet 2 5. Show collars on sediment basin #6 profile (SB -6) 15" RCP barrel. (Rev. 1) Addressed. 6. SB6 profile shows 6' x 6' x 18" concrete riser foundation while sheet 4 retention basin profile shows 18" thick, 4' x 4' reinforced concrete foundation that is buried below the basin floor. Reconcile. (Rev. 1) Addressed. 7. Sheet 3, 4 —Stormwater Management Narrative is inaccurate in certain respects. Analysis of water quality compliance is required for any SWM plan. With revised riser design, it is not immediately clear that `the peak outflows resulting from the amendment are less than those approved.' Compare proposed Pond #4 with Approved Pond #4: riser DIA/weir (may influence peak flow); embankment slope (3:1 Max./VSMH, Min. Std. 3.01, Maintenance and Safety/p. 3.01-13); low level drain sluice gate; aquatic bench details; vegetation schedule; pond #4 outfall channel adequacy/riprap; Ipo,t =38% (233,090 ftZ; WPO200600066, sheet 10A). As consequence: (Rev. 1) Addressed. a. Provide Q2, Qto, Qtoo routings; compare with WPO200600066/sheet 17A (HEC -1) routings: 32, 41, 70 cfs, respectively. b. Provide low level drain. See WP200600066, sheet 16: design with is preferable to design without. c. Transfer aquatic bench details for ponds 1, 2, 3 and 4 to this plan (clarity preferred). d. Replicate WPO200600066 vegetation schedule and planting detail (pattern), which is consistent with VSMH (proposed is not). See Attached Min. Std. 3.05. e. Delete proposed (sheet 4) Aquatic bench landscaping table. f. Review Approved (sheet 17) Dam Construction Notes. Include information not proposed with sheet 4 Embankment Notes. [Last p./review nts] Sheet 4 8. Revise Pond #4 Landscaping (plan view). (Rev. 1) Addressed. 9. Show and label existing contours in Pond #4 details (plan view). Only proposed contours are shown. (Rev. 1) Addressed. 10. Label all slopes (Max. _:_) in retention basin profile (pond/wet-side; embankment; above pond). (Rev. 1) Addressed. 11. Label VDOT pipe ES in retention basin profile. (Rev. 1) Addressed. 12. Show anti -seep collars in retention basin profile. (Rev. 1) Addressed. 13. Compare Approved Ipost, 233,090 ft2, with proposed Ipost, 216,250 ft2. Reconcile. (Rev. 1) Addressed. 14. Restore Pond #4 primary spillway outfall protection. (Rev. 1) Addressed. 15. NOTE: Submit Floodplain Development Permit Application for primary recreational area. Design should reference Code 18-30.3, Flood Hazard Overlay District (Application link, below). Reference especially 30.3.11, with particular care to any proposed fill within FEMA Zone AE. [FE ^ "'Tc ii+iage below] (Rev. 1) Addressed. FDP under review. Engineering Review Comments Page 3 of 4 Link to floodplain development permit (FDP) Application: http://www. albemarle.or¢Lunload/ima2es/forms_center/departments/Community Development/forms/applications/Floo 0 ❑o Hale .o WN scale Y -�soON C. VSMP: SWPPP: Erosion Control Plan (WP0201600001) Virginia Code §62.1-44.15:55 requires the VESCP authority to approve or disapprove an ESCP. This plan is disapproved for minor reason provided below. The ESCP content requirements can be found in County Code section 17-402. 1. Include WP0200600066 (Erosion and Sediment Control Plan Amendment for Briarwood) sheets 10 (SB5) and 12A (Pond 3 outfall/Adequate outfall narrative; channel cross-sections D -D, E -E, F -F) with plan set. Attach sheets 10 and 12A from ESCP Amendment for Briarwood, Phases, lA-1, 1-B-1, 4, & 8 [Engineering Groupe Inc. /John S. Matusik, PE, plan set d. 3/3/11; WP0200600066, Approved 6/3/2011]. These sheets show Engineering Review Comments Page 4 of 4 outfall protection extends almost to Rivanna River. Approved county plans may be borrowed/copied. (Rev. 1) Pending. Possible oversight. 6 May Applicant response: "Sheets 10 and 12A from approved WPO -2006-00066 have been included with this submittal," but they appear not to have been. 2. Present site/subdivision details for primary recreational area and ESC design details for this area. (Rev. 1) Addressed. 6 May 2016 Applicant response: "Site and VSMP plan for the primary recreation [Area] will be submitted separately." Engineering review staff available 2-4 PM Thu to meet to discuss project, comments, or design. Also available at: 434.296-5832 —x7914 (County Engineer) —thank you 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 modify VAR107199 project information in the 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; httt)://www.albemarle.org/dei)tforms.asD?deDartment--cdenawt)o Thank you. Please call if any questions —new tel. 434.872-4501 —x3069 File: WP0201600001 Briarwood Phase IA -I, 1B-1, 4 & 5 VSMP 080216revl COLLINS 4, /GARRETT ST, SUITE K CHARLOTTESVILLE VA 22902 �1I 434.293.3719 PH 434.293.2813 FX www.collins-engineering.com May 6th,2016 John Anderson, P.E. Community Development County of Albemarle 401 McIntire Road,Room 227 Charlottesville,VA 22902 RE:Briarwood Phase la-1, 1B-1,4&5 WPO Amendment(WPO 201600001) Thank you for your comments on the project referenced above. Please let this letter supplement the revised plans in response to your comments dated March 8th,2016. A. Stormwater Pollution Prevention Plan 1. Overall SWPPP Exhibit has been updated. 2. SWPPP Exhibit has been provided. 3. Registration Statement has been provided. 4. Acknowledged. B. Stormwater Management Plan 1. The plan title was revised to read'Amendment to WPO 200600066'. 2. This comment is acknowledged and the applicant is investigating this. 3. Sheet l's'Existing Vegetation' note has been updated to reference WPO 200600066. 4. The requested 2nd sentence has been added to the clouded note listing the proposed changes associated with this amendment.Also,the last sentence within this paragraph has been removed per Engineering's request. 5. Collars for the 15" RCP barrel have been shown on the sediment basin#6 profile. 6. Sediment basin#6 profile updated to match concrete riser foundation shown on Sheet 4. 7. The stormwater management narrative shown on sheet 3 has been updated.The water quality analysis for this site was previously completed and approved,and the applicant did not intend to imply an analysis for the project wasn't required.The applicant intended to communicate a detailed analysis was not required with this amendment since it was previously approved. The narrative was revised accordingly, and an analysis showing compliance with the previously approved plans is provided(i.e.sheet 4's volume comparison,sheet 3's flow comparison and the attached routing calculations for the amended facility). Also note,the amended plans are designed such that the SWM facility/pond 4 is in cut.The existing grades where the embankment is located are not steeper than 3:1 and are therefore compliant.This slope and portion of the embankment are highlighted in the profile on sheet 4.Additionally,the riprap outlet protection class and depth were revised to match the approved plans.The length was not extended to the toe of the fill though because critical slopes exist below the outfall.The!Post area was also revised and the sluice gate design,aquatic bench details and vegetation schedule were all added to the plans matching the originally approved plans.The following items were also addressed: A. The Q2,Q10 and goo routings have been provided and are compared with the approved WPO 200600066 flows on sheet 3. Please note,the revised plans reduce the flows by 98.8%,98.6%and 92.6%for the 2-, 10-and 100-year design storms.Additionally,the applicant believes the 32,41 and 70 cfs flows described in the comment letter are the inflows and the outflows this plan should be compared to are the more restrictive 2-, 10-and 100-year approved outflows of 20,27 and 55 cfs. B. Sheet 4 has been revised and now includes a riser detail mandating the construction of a sluice gate. C. The aquatic bench details from the approved WPO 200600066 are now shown on sheet 4. D. The vegetation schedule and planting detail(pattern)from the approved WPO 200600066 are now shown on sheet 4. E. The previously shown aquatic bench landscaping plan and table has been removed from sheet 4. F. The embankment design previously shown was replaced with the previously approved'dam construction notes'. 8. The prior landscaping plan erroneous shown was removed and replaced with the aquatic bench landscaping plan and table described in comment 7D. Because the'pattern'requested is generic and for a standard 10'width,the applicant does not believe a planting plan beyond this detail is required due to its simplicity. 9. Sheet 4's pond#4 detail has been revised and now shows existing contours with labels.The applicant apologizes for the prior printing mistake. 10. The retention pond profile shown on sheet 4 now lists maximum 2:1 and 3:1 slopes. 11. The endwall was previously labeled with the barrel, however the plans have been revised to be clearer and the VDOT standard precast endwall now has a stand-alone note. 12. The retention pond profile shown on sheet 4 has been revised to show the anti-seep collars and their design. 13. The plans were revised to show the l 233,090 sf of impervious area.Consequently,the amended facility was enlarged slightly to account for this additional water quality volume requirement. Please see the top- center of sheet 4 for a direct comparison of the amended(larger)facility with the previously approved (smaller)facility.The tables in this location also list the minimum water quality volume requirements and show the plans'compliance. 14. The primary(barrel)spillway outfall protection has been revised and is now the same class and depth of riprap as it was originally approved as. 15. This comment is acknowledged and the applicant is investigating this. C. Erosion Control Plan 1. Sheets 10 and 12A from approved WPO-2006-00066 plans have been included with this submittal. 2. Site and VSMP plan for the primary recreation will be submitted separately. If you have any questions regarding the proposed stormwater management plans please do not hesitate to contact Graham Murray at graham@collins-engineering.com. If you have any questions concerning the SWPPP and erosion and sediment control plans,please contact Adam Long at adam@collins-engineering.com. Sincerely, Graham Murray, P.E. 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: Briarwood Phase IA -I, 113-1, 4 &5 —VSMP/WPO Plan preparer: Scott Collins; Collins Engineering [200 Garrett St., Suite K Charlottesville, VA 22902, scott(cDcollins-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 Jan 2016 Date of comments: 8 Mar 2016 Reviewer: John Anderson WP0201600001 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. Revise Overall SWPPP Mapping Exhibit (8/8/14; Attached) to cover primary recreational area. Holtzman Oil recently purchased parcel shown on the Mapping Exhibit. County has advised Holtzman to complete a Registration Statement and apply for independent VPDES permit. 2. Provide SWPPP Exhibit, typical of Collins Engineering projects. 3. Complete Attached General VPDES Permit Registration Statement. 4. Revise Total Area of Development to include entire development, including primary recreational area. Please note: primary recreational area, which does not have conceptual or prior reviewed plans as far as we're aware, is subject to Part IIB technical criteria (9VAC25-870-65). The major residential lot portion of this VSMP is subject to Part IIC, and review comments are constrained to minor requests, including transfer of SWM details from WP0200600066 to this plan. B. VSMP: SWPPP: Stormwater Management Plan (WP0201600001, Amendment to WP0200600066) 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. Include Amendment to WPO2006-00066 in Plan Title. 2. Present site/subdivision details for primary recreational area, and Part IIB SWM design details for this area. Sheet 1 3. Recommend reference WP02006-00066 in Existing Vegetation Note. 4. VSMP Plan Amendment Proposed Changes: Insert new 2nd sentence: "Pond #4 shape and design elevations have changed, see plan details. Also: Delete last sentence in this sheet 1 cloud revision note. Sheet 2 5. Show collars on sediment basin #6 profile (SB -6) 15" RCP barrel. 6. SB6 profile shows 6' x 6' x 18" concrete riser foundation while sheet 4 retention basin profile shows 18" thick, 4' x 4' reinforced concrete foundation that is buried below the basin floor. Reconcile. 7. Sheet 3, 4 —Stormwater Management Narrative is inaccurate in certain respects. Analysis of water quality compliance is required for any SWM plan. With revised riser design, it is not immediately clear that `the Engineering Review Comments Page 2 of 4 peak outflows resulting from the amendment are less than those approved.' Compare proposed Pond #4 with Approved Pond #4: riser DIA/weir (may influence peak flow); embankment slope (3:1 Max.NSMH, Min. Std. 3.01, Maintenance and Safety/p. 3.01-13); low level drain sluice gate; aquatic bench details; vegetation schedule; pond #4 outfall channel adequacy/riprap; Ipost =38% (233,090 ft2; WPO200600066, sheet 10A). As consequence: a. Provide Q2, Qio, Qioo routings; compare with WPO200600066/sheet 17A (HEC -1) routings: 32, 41, 70 cfs, respectively. b. Provide low level drain. See WP200600066, sheet 16: design with is preferable to design without. c. Transfer aquatic bench details for ponds 1, 2, 3 and 4 to this plan (clarity preferred). d. Replicate WPO200600066 vegetation schedule and planting detail (pattern), which is consistent with VSMH (proposed is not). See Attached Min. Std. 3.05. e. Delete proposed (sheet 4) Aquatic bench landscaping table. f. Review Approved (sheet 17) Dam Construction Notes. Include information not proposed with sheet 4 Embankment Notes. [Last p. /review comments] Sheet 4 8. Revise Pond 44 Landscaping (plan view). 9. Show and label existing contours in Pond 44 details (plan view). Only proposed contours are shown. 10. Label all slopes (Max. _:_ ) in retention basin profile (pond/wet-side; embankment; above pond). 11. Label VDOT pipe ES in retention basin profile. 12. Show anti -seep collars in retention basin profile. 13. Compare Approved Ipost, 233,090 ft2, with proposed Ipoq, 216,250 W. Reconcile. 14. Restore Pond #4 primary spillway outfall protection. 15. NOTE: Submit Floodplain Development Permit Application for primary recreational area. Design should reference Code 18-30.3, Flood Hazard Overlay District (Application link, below). Reference especially 30.3.11, with particular care to any proposed fill within FEMA Zone AE. [FEMA/GIS image, below] Link to floodplain development permit (FDP) Application: hqp://www.albemarle.orWupload/imaaes/forms_center/departments/Community Development/forms/applications/Floo dplain Development_Permit.pdf Engineering Review Comments Page 3 of 4 0 o help n, WN scaleY-Oft C. VSMP: SWPPP: Erosion Control Plan (WP0201600001) 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. Include WP0200600066 (Erosion and Sediment Control Plan Amendment for Briarwood) sheets 10 (S135) and 12A (Pond 3 outfall/Adequate outfall narrative; channel cross-sections D -D, E -E, F -F) with plan set. Attach sheets 10 and 12A from ESCP Amendment for Briarwood, Phases, IA- 1, 1-B-1, 4, & 8 [Engineering Groupe Inc. / John S. Matusik, PE, plan set d. 3/3/11; WP0200600066, Approved 6/3/2011]. These sheets show outfall protection extends almost to Rivanna River. Approved county plans may be borrowed/copied. 2. Present site/subdivision details for primary recreational area and ESC design details for this area. Engineering review staff available 2-4 PM Thu to meet to discuss project, comments, or design. Also available at: 434.296-5832 -x3069 —thank you 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 modify VAR107199 project information in the DEQ database for state application processing. DEQ will review the application information based on local VSMP Engineering Review Comments Page 4 of 4 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; hllp://www.albemarle.oriz/deptfortns.asp?del2arttnent--cdengno File: WP0201600001 Briarwood Phase IA -I, 113-1, 4 & 5 VSMP 030816 DAM CONSTRUC'nON GEOTECHNICAL CONSULTANT TO SPECIFY DAM EMBANKMENT MATERIAL, SEEPAGE CONTRCL DEVICES, CUT—OFF TRENCH DESIGN, CULVERT BEDDING REQUIREMENTS, AND OTHER APPROPRIATE GEOTECHNICAL DESIGN REQUIREMENTS. FOUNDATION AND ABUTMENT AREA EXTENDING 10' BEYOND DAM FOOTPRINT SHALL BE CLEARED, GRUBBED & STRIPPED OF ALL VEGETATION TOPSOIL AND/OR ORGANIC SOIL & OTHER UNSUITABLE MATERIALS, AFTER CLEARING, GRUBBING, STRIPPING AND REMOVING ANY OTHER UNSUITABLE MATERIALS, THE SUBGRADE SHALL BE PROOFROLLED WITH COMPACTON EQUIPMENT UNDER THE OBSERVATION OF A QUALIFIED ENGINEER. THE COMPACTION EQUIPMENT SHOULD BE THE HEAVIEST POSSIBLE EQUIPMENT THAT WILL NOT CAUSE DISTURBANCE OF SUITABLE SUBGRADE SOILS. EXCESSIVELY SOFT OR UNSUITABLE MATERIALS SHALL BE REMOVED AND REPLACED WITH COMPACTED FILL WHERE ROCK IS EXPOSED AFTER STRIPING OR UNDERCUTTING, ALL LOOSE ROCK MATERIAL SHALL BE REMOVED PRIOR TO PLACING COMPACTED FILL ROCK SUBGRADES SHALL BE INSPECTED AND APPROVED BY THE INSPECTOR OR ENGINEER PRIOR TO PLACEMENT OF FILL. COMPACTED FILL. SHALL NOT BE PLACED PRIOR TO PERFORMING THE REQUIRED FOUNDATION AND ABUTMENT PREPARATION, OR ON ANY FROZEN SURFACE COMPACTED FILL SHALL EXTENT] TO THE FILL LIMIT LINES AND GRADES INDICATED BY THE APPROVED CONSTRUCTION PLAN. COMPACTED FILL MATERIAL SHALL BE OF THE TYPE CLASSIFICATION SYMBOL SPECIFIED BY THE GEOTECHNICAL CONSULTANT, OR OF A BETTER QUALITY MATERIAL AS DEFINED BY THE UNIFIED SOIL CLASSIFICATION SYSTEM. ALSO, RESTRICTIONS ON THE LIQUID LIMITS AND PLASTICITY INDEX OF THE MATERIAL MAY BE INCLUDED WHERE APPLJCABLE, COMPACTED FILL SHALL CONSIST OF MATERIAL FREE OF ORGANIC MATTER, RUBBISH, FROZEN SOIL, SNOW, ICE, PARTICLES WITH SIZES LARGER THAN 3' OR OTHER DELETERIOUS MATERIAL COMPACTED FILL SHALL BE PLACED IN HORIZONTAL LAYERS OF 8" TO 12" IN LOOSE THICKNESS. ACTUAL LIFT THICKNESS WILL BE SPECIFIED BY THE GEOTECHNICAL CONSULTANT THE MOISTURE CONTENT SHALL BE CONTROLLED SUCH THAT COMPACTION IS ACHIEVED WITHOUT YIELDING OF THE SURFACE. EACH LAYER SHALL BE UNIFORMLY COMPACTED WITH SUITABLE COMPACTION EQUIPMENT TO AT LEAST 95% OF STANDARD PROCTOR MAXIMUM DENSITY IN ACCORDANCE WITH ASTM 0-698. AASHTO T-99, OR VBOT SPECIFICATIONS. ANY LAYER OF FINE GRAINED FlLL WHICH BECOMES SMOOTH UNDER COMPACTION OR CONSTRUCTION TRAFFIC SHOULD BE SCARIFIED TO A DEPTH OF 2" TO ALLOW ADEQUATE BONDING BETWEEN LAYERS. COMPACTED FILL WITH A MOISTURE CONTENT WHICH WILL NOT PERMIT COMPACTION TO THE SPECIFIED DENSITY STANDARD SHALL BE SCARIFIED DRIED OR WETTED AS NECESSARY TO PERMIT PROPER COMPACTION. f = 14001 'tool OF A 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: Briarwood Phase lA-1, 1B-1,4&5—VSMP/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.0.Box 5548,Charlottesville,VA 22905] Plan received date: 13 Jan 2016 Date of comments: 8 Mar 2016 Reviewer: John Anderson WP0201600001 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. Revise Overall SWPPP Mapping Exhibit(8/8/14;Attached)to cover primary recreational area. Holtzman Oil recently purchased parcel shown on the Mapping Exhibit. County has advised Holtzman to complete a Registration Statement and apply for independent VPDES permit. 2. Revise Total Area of Development to include entire development,including primary recreational area. Please note:primary recreational area,which does not have conceptual or prior reviewed plans as far as we're aware,is subject to Part IIB technical criteria(9VAC25-870-65). The major residential lot portion of this VSMP is subject to Part IIC,and review comments are constrained to minor requests,including transfer of SWM details from WP0200600066 to this plan. 3. Provide SWPPP Exhibit,typical of Collins Engineering projects. B. VSMP: SWPPP: Stormwater Management Plan(WPO201600001,Amendment to WP0200600066) 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. Include Amendment to WP02006-00066 in Plan Title. 2. Present site/subdivision details for primary recreational area,and Part IIB SWM design details for this area. Sheet 1 3. Recommend reference WP02006-00066 in Existing Vegetation Note. 4. VSMP Plan Amendment Proposed Changes: Insert new 2id sentence:"Pond#4 shape and design elevations have changed,see plan details. Also: Delete last sentence in this sheet 1 cloud revision note. Sheet 2 5. Show collars on sediment basin#6 profile(SB-6) 15"RCP barrel. 6. SB6 profile shows 6' x 6' x 18"concrete riser foundation while sheet 4 retention basin profile shows 18" thick,4' x 4'reinforced concrete foundation that is buried below the basin floor. Reconcile. 7. Sheet 3,4—Stormwater Management Narrative is inaccurate in certain respects. Analysis of water quality compliance is required for any SWM plan. With revised riser design,it is not immediately clear that'the peak outflows resulting from the amendment are less than those approved.' Compare proposed Pond#4 fr . Engineering Review Comments Page 2 of 4 with Approved Pond#4:riser DIA/weir(may influence peak flow);embankment slope(3:1 Max.NSMH, Min. Std. 3.01,Maintenance and Safety/p.3.01-13);low level drain sluice gate;aquatic bench details; vegetation schedule;pond#4 outfall channel adequacy/riprap;Ipost=38%(233,090 ft2;WP0200600066, sheet 10A). As consequence: a. Provide Qz,Qio,Qioo routings;compare with WP0200600066/sheet 17A(HEC-1)routings:32, 41,70 cfs,respectively. b. Provide low level drain. See WP200600066,sheet 16: design with is preferable to design without. c. Transfer aquatic bench details for ponds 1,2,3 and 4 to this plan(clarity preferred). d. Replicate WP0200600066 vegetation schedule and planting detail(pattern),which is consistent with VSMH(proposed is not). See Attached Min. Std.3.05. e. Delete proposed(sheet 4)Aquatic bench landscaping table. f. Review Approved(sheet 17)Dam Construction Notes. Include information not proposed with sheet 4 Embankment Notes. [Last p./review comments] Sheet 4 8. Revise Pond#4 Landscaping(plan view). 9. Show and label existing contours in Pond#4 details(plan view). Only proposed contours are shown. 10. Label all slopes(Max._:_)in retention basin profile(pond/wet-side;embankment;above pond). 11. Label VDOT pipe ES in retention basin profile. 12. Show anti-seep collars in retention basin profile. 13. Compare Approved Ipost,233,090 ft2,with proposed Ipost,216,250 ft2. Reconcile. 14. Restore Pond#4 primary spillway outfall protection. 15. NOTE: Submit Floodplain Development Permit Application for primary recreational area. Design should reference Code 18-30.3,Flood Hazard Overlay District(Application Attached). Reference especially 30.3.11,with particular care to any proposed fill within FEMA Zone AE. [FEMA/GIS image,below] • X ! BRIARWOOb ��`: NE 396 y.,i.0 ../e/ i� ZONE X DR O /#�'/ 0) x'," 0 0 0 //4 `,4011 �� \� RD CAMELOT /i• . : ilp,ltriftri P 389 MERLIN �40"'1"`S -,- :D © ZONE X , Ail� 'GI et4 0 o i ZONE © `9� e" llrftt AE 1A../ ZONE X�- 0 395 • 1114,40014:ZE 389 �� v )10110X393 r %� 390 »� '1�� ♦ h,392 .414388 P� ' �,/, ®Ji . / _ / "viva Engineering Review Comments Page 3 of 4 o�a ...a Mob. Sc.k 3'-350 ft •4414r •®o.^O_. 4, ss, .4,, 3,,„ ...itA,Ab._,,,..,7,:kwvaci,N,-.44.--,414":07-4 .,,Lvt„ ,,....„ I, b>._..,..--�' , ..rk `; ' vim 44 fdi., AW Ir NT''tip* ' w..... "di ,. It au,--7-Ahisr-4-0 fif, _,„ , ,,,._:04,6,...r. , tat--4, ... 1;741•• it 11),V*stirri"' ----II -• 4;,4 ,-,Hicike GI (144 0 , gem, ,4iter-fr. 1/ Alt !'! ali C. VSMP: SWPPP: Erosion Control Plan(WPO201600001) 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. Include WP0200600066(Erosion and Sediment Control Plan Amendment for Briarwood)sheets 10(SB5) and 12A(Pond 3 outfall/Adequate outfall narrative;channel cross-sections D-D,E-E,F-F)with plan set. Attach sheets 10 and 12A from ESCP Amendment for Briarwood,Phases, 1A-1, 1-B-1,4,&8 [Engineering Groupe Inc./John S.Matusik,PE,plan set d.3/3/11;WP0200600066,Approved 6/3/20111. These sheets show outfall protection extends almost to Rivanna River. Approved county plans may be borrowed/copied. 2. Present site/subdivision details for primary recreational area and ESC design details for this area. Engineering review staff available 2-4 PM Thu to meet to discuss project,comments,or design. Also available at: 434.296-5832-x3069—thank you 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 modify VAR107199 project information in the DEQ database for state application processing. DEQ will review the application information based on local VSMP tar' 1.01 Engineering Review Comments Page 4 of 4 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/deptforms.asp?department=cdengwpo DAM CONSTRUCTION NOTES 1. GEOTECHNICAL CONSULTANT TO SPECIFY DAM EMBANKMENT MATERIAL, SEEPAGE CONTROL DEVICES, CUT-OFF TRENCH DESIGN, CULVERT BEDDING REQUIREMENTS, AND OTHER APPROPRIATE GEOTECHNICAL DESIGN REQUIREMENTS. 2. FOUNDATION AND ABUTMENT AREA EXTENDING 10' BEYOND DAM FOOTPRINT SHALL BE CLEARED, GRUBBED & STRIPPED OF ALL VEGETATION TOPSOIL AND/OR ORGANIC SOIL & OTHER UNSUITABLE MATERIALS. 3. AFTER CLEARING, GRUBBING, STRIPPING AND REMOVING ANY OTHER UNSUITABLE MATERIALS, THE SUBGRADE SHALL BE PROOFROLLED WITH COMPACTION EQUIPMENT UNDER NE OBSERVATION OF A QUAUFIED ENGINEER. THE COMPACTION EQUIPMENT SHOULD BE THE HEAVIEST POSSIBLE EQUIPMENT THAT WILL NOT CAUSE DISTURBANCE OF SUITABLE SUBGRADE SOILS. EXCESSIVELY SOFT OR UNSUITABLE MATERIALS SHALL BE REMOVED AND REPLACED WITH COMPACTED FILL. WHERE ROCK IS EXPOSED AFTER STRIPING OR UNDERCUTTING, ALL LOOSE ROCK MATERIAL SHALL BE REMOVED PRIOR TO PLACING COMPACTED ALL ROCK SUBGRADES SHALL BE INSPECTED AND APPROVED BY THE INSPECTOR OR ENGINEER PRIOR TO PLACEMENT OF FILL. 4. COMPACTED ALL SHALL NOT BE PLACED PRIOR TO PERFORMING THE REQUIRED FOUNDATION AND ABUTMENT PREPARATION, OR ON ANY FROZEN SURFACE. COMPACTED FILL SHALL EXTEND TO THE FILL UNIT LINES AND GRADES INDICATED BY THE APPROVED CONSTRUCTION PLAN. COMPACTED FILL MATERIAL SHALL BE OF THE TYPE CLASSIFICATION SYMBOL SPECIFIED BY THE GEOTECHNICAL CONSULTANT, OR OF A BETTER QUAUTY MATERIAL AS DEFINED BY THE UNIFIED SOIL CLASSIFICATION SYSTEM. ALSO, RESTRICTIONS ON THE UQUID UNITS AND PLASTICITY INDEX OF THE MATERIAL MAY BE INCLUDED WHERE APPUCABLE. COMPACTED FILL SHALL CONSIST OF MATERIAL FREE OF ORGANIC MATTER, RUBBISH. FROZEN SOIL, SNOW, ICE, PARTICLES WITH SIZES LARGER THAN 3" OR OTHER DELETERIOUS MATERIAL. 5. COMPACTED FILL SHALL BE PLACED IN HORIZONTAL LAYERS OF 8" TO 12" IN LOOSE THICKNESS. ACTUAL UFT THICKNESS WILL BE SPECIFIED BY THE GEOTECHNICAL CONSULTANT. THE MOISTURE CONTENT SHALL BE CONTROLLED SUCH THAT COMPACTION IS ACHIEVED WITHOUT YIELDING OF THE SURFACE. EACH LAYER SHALL BE UNIFORMLY COMPACTED WITH SUITABLE COMPACTION EQUIPMENT TO AT LEAST 95% OF STANDARD PROCTOR MAXIMUM DENSITY IN ACCORDANCE WITH ASTM 0-698, AASHTO T-99, OR VDOT SPECIFICATIONS. ANY LAYER OF FINE GRAINED FILL WHICH BECOMES SMOOTH UNDER COMPACTION OR CONSTRUCTION TRAFFIC SHOULD BE SCARIFIED TO A DEPTH OF 2" TO ALLOW ADEQUATE BONDING BETWEEN LAYERS. 6. COMPACTED FILL \9TH A MOISTURE CONTENT WHICH WILL NOT PERMIT COMPACTION TO THE SPECIFIED DENSITY STANDARD SHALL BE SCARIFIED DRIED OR WETTED AS NECESSARY TO PERMIT PROPER COMPACTION.