AND HOW IT RELATES TO TITLE 25 CHAPTER 102 or What We Look For and Why. Southeast PA Conservation Districts June 26, 2009 Creamery, PA

Transcription

1 AND HOW IT RELATES TO TITLE 25 CHAPTER 102 or What We Look For and Why Southeast PA Conservation Districts June 26, 2009 Creamery, PA

2 Name: Address: Telephone No.: D&N Qualifications: N

3 102.4(b)(5)(i) The existing topographic features of the project site and the immediate surrounding area. Legible mapping D Existing contours D Existing improvements, i.e. roads, buildings, utilities, etc. D Existing streams, wetlands, receiving watercourses, etc. D Sufficient surrounding area D Location map, i.e. USGS D or N

4 Can you read all the words, symbols & numbers? Has clutter been avoided? Is the scale large enough? (1 = 50 or less) Have you included a smaller scale overall plan on a single sheet for large sites?

5 Are Dashed Lines used to depict existing contours? Are the Intervals Between Contours adequate to describe the existing topography? (Recommended Max. = 2-foot) 2

6 Are all existing roadways shown & labeled on the plan map(s)? Are all existing buildings (including any to be razed) shown on the plan map(s)? Are all utilities (gas, water, sewer, electric, etc.) shown on the plan map(s)?

7 In Pennsylvania, notice in the design or planning phase of every work operation that involves the movement of earth with powered equipment. This notice is not less than 10 nor more than 90 business days before final plan approval. The PA One Call Symbol AND SITE ID NUMBER must be on the plan sheets.

8 These things should be shown on the plan sheets: Streams (defined bed & banks) Wetlands (as per delineation) Receiving watercourses (including storm sewers) Offsite receiving waters should be shown (Plan Map or Location Map) Chapter 93 classification identified on the plan sheets

9 Does mapping extend far enough beyond the permit/site boundaries to define watershed boundaries? Are nearby roadways, structures, utilities, receiving streams, etc. shown on the plan map? Can an adequate receiving watercourse be defined by the mapping provided? Minimum of 50 feet outside limit of disturbance

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11 Has a photocopy of the appropriate USGS Topo map with the project boundaries outlined been provided? Is the Quadrangle Name identified?

12 PROJECT OUTLINE QUAD NAME SPRING CREEK QUAD

13 102.4(b)(5)(ii) The types, depth, slope, locations and limitations of the soils Types, slopes, & locations of soil types D Soil type use limitations and resolutions Hydric soils N N Available from the Web Soil Survey -

14 Have the Soil Boundaries been plotted on the Plan Map(s)? Has a Legible Photocopy of the appropriate soil map from the Soil Survey with the project outlined been provided? Have Soil Symbols been identified?

15 Have the Soil Use Limitations (erodibility, shear strength, fertility, etc.) listed in the Soil Survey been identified? Refer to tables 6,7, and 8 in the old soil survey. Are Resolutions to these limitations described in the narrative and on the plan sheets?

16 If soils are hydric or have hydric components, you are obligated to perform a wetland determination if wetlands are present, you are obligated to perform a wetland delineation.delineate all wetlands on the plan sheets and provide a corresponding report.

17 102.4(b)(5)(iii) The characteristics of the earth disturbance activity, including the past, present, and proposed land uses and the proposed alteration to the project site. Proposed NPDES boundary and limits of construction Proposed contours/grades Proposed waterways & stormwater management facilities Proposed improvements, I.e. roads, buildings, utilities, etc. D Complete mapping symbols legend and north arrow Past, present and proposed land uses D D D D N

18 May or may not be the same line. Is the Permit/Project Boundary clearly shown on the Plan Map(s)? Is all proposed earthmoving (including BMPs & utility lines) within the delineated boundary? Are all areas within the boundary that are to remain undisturbed clearly identified?

19 The Limit of Construction should include all proposed disturbance, both onsite and offsite (utilities, roadwork, etc.) The NPDES Permit Boundary should include all areas of disturbance, plus any areas that are proposed to be protected for post construction purposes. It may also include future phases not proposed for disturbance at this time. This will have to be noted on the NOI, and certain conditions apply.

20 Are proposed contours shown as SOLID LINES? Are they at the same INTERVALS as the existing contours? Do proposed contours TIE INTO existing contours? Are all proposed grades clearly depicted?

21 Are all proposed channels, including outlet channels; culverts; slope pipes; and storm sewer inlets, pipes, and basins shown on the E & S Plan Maps? Does a means to get water safely to the receiving watercourse exist?

22 Are all proposed roadways (including access roads) shown & labeled on the Plan Map(s)? Are all proposed buildings shown on the Plan Map(s)? For Housing Developments, are the lots shown? Are the utility mains shown on the Plan Map(s) and do conflicts exist between the utilities and proposed E&S BMP s?

23 Are all symbols used on the Plan Maps identified in the Legend? If notes or bullets are used to identify symbols, are they easily understandable and easily located?

24 Is it on the plan sheets? Does it point North? Graphic Written

25 In the narrative describe the past (minimum 50 years) present (predominant use for last 5 years) and proposed land uses. If the site had a checkered past such a gas station dry cleaner. Chemical dump. Orchard a phase I and/or phase II environmental site assessment may need to be performed and section B.10 of the NOI should be completed (not checked N/A).

26 102.4(b)(5)(iv) The amount of runoff from the project area and its upstream watershed area. Maximum during construction drainage areas D Offsite drainage area(s) on USGS quadrangle map N Peak flow calculations for all channels N

27 Are all drainage areas to the BMP s shown on the Plan Maps? Are the drainage areas the Maximums? Have areas captured by roadways been addressed? Have areas captured by storm sewers been addressed? Have areas captured by cuts, fills, rooftops, etc. been addressed? If necessary, has a USGS map with offsite drainage areas delineated on it been included?

28 A2 TOTAL DRAINAGE AREA TO BASIN SB1 = A1 + A2 A1

29 Are Peak Flow Calculations provided for all channels? 1.67 cfs/acre X DA for temporary 2.25 cfs/acre X DA for temporary channels in special protection watersheds 2.75 cfs/acre X DA for permanent Use Standard Worksheet #18, or supply the information with the other channel calculations If Standard Tables for sizing & spacing of waterbars, ditch relief culverts, temporary slope pipes, etc. were used, have supporting calculations been provided?

30 102.4(b)(5)(v) The location of waters of the Commonwealth which may receive runoff within or from the project site and their classification pursuant to Chapter 93 of this title. Existing streams, wetlands, floodway, etc. Receiving watercourses Chapter 93 classification of streams D D N & D

31 Are all stream channels (defined bed & bank) shown on the Plan Map(s)? Are all wetlands (as per delineation) shown on the Plan Map(s)? If a FEMA study has been done, is the 100-year floodway shown on the Plan Map(s)?

32 Are the Names of the receiving streams shown on the Plan Map(s)? If no name exists, is it labeled Unnamed Tributary to? Where discharge is to a Municipal Storm Sewer System, is the system identified? The receiving watercourse of the storm system must be identified. Are Other receiving waters identified? Is the Chapter 93 Stream Classification on the plan sheets, correct, and consistent with the narrative and NOI?

33 102.4(b)(5)(vi) A written depiction of the location and type of perimeter and on site BMPs used before, during, and after the earth disturbance activity.

34 102.4(b)(5)(vii) A sequence of BMP installation and removal in relation to the scheduling of earth disturbance activities, prior to, during and after earth disturbance activities. Complete and site specific sequence of BMP inst. D Activities planned to limit exposed areas D&N Removal of temporary BMPs D&N

35 The Construction Sequence IS AN E&S CONTROL!!! The sequence is the main tool for E&S control plan preparers to use to communicate to operators how they envision the progression of the site construction.

36 Where BMPs will discharge to Proposed Storm Sewers, will the sewers be functional by then? Are the outfall channels installed prior to basins? Are basins installed prior to channels which discharge to them? Are Sewer & Utility Lines addressed?

37 Is the sequence specific to the project? Should be limited to E&S control installation and removal in relation to the overall earthmoving of the project. Are the BMPs to be installed prior to each stage (initial disturbance to final stabilization) of Construction identified? Does the sequence address installation of BMPs that will be used such as: Rock Construction Entrances BMPS for Clearing & Grubbing Access for BMP construction Temporary Stream Crossings

38 Minimizing the area that is disturbed at any one time through phasing or concurrent stabilization. Minimizing the time that any particular area is disturbed.

39 Are the removal of the BMP s in the sequence? Has the uniform 70% vegetative cover prior to removal of controls been noted in the sequence? Has the stabilization of the areas disturbed during removal of BMP s been noted in the sequence? Are there any special considerations that need to be addressed basin conversion / removal, temporary pipes, etc.

40 102.4(b)(5)(viii) Supporting Calculations

41 102.4(b)(5)(ix) Plan Drawings Channels Locations D Contours and Grades D Complete Details D Capacity & Freeboard Calculations N Protective Lining Calculations N

42 Are all proposed Channels Shown on the Plan Map(s) & Labeled? Are contours shown on the plan sheets? Are the locations Accessible? Are channels intersected by utilities and/or other structures? Are there any sharp turns or flow obstructions? Are Steep Slopes avoided? Are Temporary Crossings provided where needed?

43 Are they Located ABOVE all Disturbed Areas or adequately Protected? Do they Outlet to Natural Waterways or Adequate Storm Sewers? Do they avoid Discharging to Other Channels? Do they avoid Discharging to Downslope Structures?

44 Are they located BELOW all disturbed areas? If not: Are Sequencing Problems avoided? Are BMPs for Downslope Areas provided? Are Temporary Crossings Provided? Do they enter Traps or Basins on the UPSLOPE side?

45 Collector Channel should enter the basin here Or here Not here (Unless a Baffle is Provided) Not here

46 Do they outlet to Natural Waterways or Adequate Storm Sewers? Has Adequate Protection been provided from Adjacent Disturbed Areas? Have they been sequenced correctly?

47 Have Alignment Problems been avoided? Have Significant Changes in Slope been Addressed? Separate Reaches Max & Min Slopes

48 Are Typical Details provided for Each Channel Type? Are Typical Details provided for Each Protective Lining Type? Has a Summary Table been Provided? Are all Critical Dimensions Specified? Are all Protective Linings Specified? Is the information consistent with that in the Supporting Calculations?

49 The Program or Spreadsheet & its Source should be Identified Any Limitations Listed by the Designer should be Noted. The Input Data should be Provided along with the Results. At a minimum, all of the information required on worksheet #21 should be provided.

50 Locations Contours Complete berm & outlet details Cleanout information Capacity info Discharge calcs Dewatering calculations Discharge to waters of the Commonwealth Structurally sound D D & N D & N N N D D & N

51 Are all proposed locations shown on the Plan Map(s)? Are they accessible? Will access roads need to be constructed? Are they intersected by utilities or other structures? Are there slope problems? Are they located BELOW disturbed areas? Have wetlands been avoided?

52 Has a Construction Detail been provided for Each Proposed Basin? Are enough Contours provided to determine the Basin s Storage Capacity?

53 Does each basin have an Emergency Spillway? Is there a Typical Detail for each type of Spillway/Spillway Liner? Are the spillway Locations shown on the Basin Detail(s)?

54 Is there a Summary Table? Does it show All Critical Dimensions & Elevations? Is it Consistent with the Calculations? Are there details for all risers? Is there adequate information in the riser details to have the risers constructed? (perforation elevations, diameter, hole spacing, etc)

55 1000 cf per disturbed acre MINIMUM. Don t round down when calculating elevations. Is adequate storage provided below the cleanout elevation?

56 Is there a Cross-section for each Basin? Is the Embankment Top Width > 8 FT? Are all Critical Elevations Specified? Is the Embankment Slope < 2:1 (H:V)? Is Z1 + Z2 > 5? Is the Emergency Spillway Crest Elevation at least 6 above the riser crest elevation? Are proposed Key Trenches, Anti-seep Collars, etc. shown? Are Outlet Barrel material, dimensions, & elevations specified?

57 1000 cf of storage for disturbed area Cleanout elevation 5000 cf of storage for total drainage area Above Cleanout elevation Determines top of riser elevation Don t round down Reductions: Can t be taken in HQ or EV Watersheds Top dewatering means a skimmer is used For Permanent Pool avg. of point of inflow, central point, and outflow.

58 Are inlets to the basins located so that a 2:1 Flow Length to Width Ratio at riser crest elevation is provided? For 2:1-1.41(Surface area at top of settling volume) 0.5 For 4:1 2(Surface area at top of settling volume) 0.5 Are Baffles provided if required? Is a Typical Detail for the Baffle provided on a Detail Sheet? If super silt fence is proposed, is the maximum post spacing at 4 feet?

59 Find your most restrictive flow between the orifice flow, weir flow, and barrel capacity to get the principal spillway capacity. Calculate the depth of flow through the spillway to get 2 cfs/ac. Top of berm must be 2 feet higher than this elevation.

60 From top of riser to cleanout Use 1 inch perforations Include elevations of perforations

61 Water surface elevations should coincide with Worksheet #15 Storage volumes should coincide with stage storage curve 3.98 days is not 4-7 day dewatering

62 Is Outlet Protection provided for the Principal & Emergency Spillways? Riprap Aprons Are the Dimensions > the Minimums Derived from Figure 21 or Figure 22 in the Program Manual? Is a Typical provided for Each Type of Apron? Are Outlet Channels provided where needed?

63 Do all basins discharge directly to natural or manmade channels? Is a downstream analysis necessary? Has all the Required Channel Info been provided for all Outlet Channels? Long or Steep Slopes: Is Erosion of the Downslope Area likely? Is a Temporary Slope Pipe provided? Are Discharge Velocities provided? Is there suitable Outlet Protection?

64 Soils with Low Shear Strength Embankment Materials Specially Handled or Replaced by more suitable material? Inside Slopes > 3:1 (H:V)? Piping Anti-seep Collars provided? NRCS Design? If Protective Fence is proposed, is it Located along the Outside Bottom of the Embankment? Protected from unauthorized acts of third parties?

65 Locations Contours D Complete berm & outlet details D & N Cleanout information D & N Capacity information N Discharge calculations N Discharge to waters of the D Commonwealth or approved alternative

66 Locations Below proposed disturbance and outside of roadways Contours Are contours provided Complete Berm and Outlet details - Typical Detail for Each Type of Trap with a table containing specific information for each trap. Cleanout Info 700 cf/ac Have necessary worksheets been completed, or has all information been provided? Capacity Information 1300 cf/acre above clean out Discharges 1.5 cfs/ac Are all traps a minimum of 3 feet, with 1 a minimum depth of one foot for each of cleanout, settling volume, and freeboard?

67 Are Spillway Locations Shown on the Details or Plan Maps? Is the Flow Length:Width Ratio > 2:1 (except Inlet Traps)? If not, has an appropriate baffle been provided with detail? Is there a Typical Detail for each type of Trap Outlet? Do the Details conform to the standards on Standard Worksheets 10 through 12? Are embankment traps proposed in cut?

68 Does the trap have an adequate outlet? Riprap Apron is it level? Outlet Basin - Do the Dimensions conform to Figure 15? FIGURE 15 Sediment Trap Outlet Basin Details Note: Basin Depth = D For Rock Protection Placement Thickness, See Table 9.

69 Locations Complete Details D D

70 Are all Proposed Locations Shown on the Plan Map(s)? Are the Alignments on Existing Level Grade? Is there disturbance below the fence? Is the silt fence used in series? Are Slope Lengths < the Maximums in Table 18? Are Concentrated Flows Avoided? Are Limiting Soil Factors Addressed? Are the Ends Extended Upslope for 8 at 45 O to the Main Fence Alignment?

71 Is there a Typical Detail for Each Type of Fence proposed? Do the Details conform to the standards of Standard Construction Details 19 through 22? Is Post Embedment 18? Is there a Detail for Joining Fence Sections?

72 Is there Access for Equipment to install the Support Posts?

73 Is Sediment Removal called for wherever it reaches ½ the Above Ground Height of the Fence specified? Is a Rock Filter Outlet Specified wherever Undermining or Overtopping occurs? Is there a Rock Filter Outlet Detail that conforms to Standard Construction Detail #18?

74 Locations Complete Details D Design Calculations N

75 Are all proposed BMP and Stormwater Outlets Shown on the Plan Map(s)? Is there Sufficient Room to construct the proposed Structures? Do the Outlets Discharge to Natural Waterways? Natural Swale Is Erosion Likely? Does the Orientation Facilitate Flow? Are there Downslope Structures? Are controls proposed for the installation?

76 Is there a Typical Detail for Each Type of Outlet Protection? Do the Details conform to the Standards in the E & SPC Manual? Riprap Aprons Standard Construction Detail #33 (where applicable) Stilling Basins Figure 23 Stilling Wells Figure 25 Is there a Summary Table with all Critical Dimensions & Elevations (e.g. R-size)?

77 Are the Anticipated Qs & Velocities Provided? Riprap Aprons Are the Velocities < Max Permissible for the Size of the Riprap in Table 9? Do the Dimensions of the Apron conform to Figure 21/22? Have the figures been included in the narrative with the corresponding information for each apron? Stilling Basins Does the Size of the Riprap conform to Figure 24?

78 Locations Complete Details D Design Calculations N Some examples: Rock Filter for silt fence Stream Crossing controls Utility Line Trench Excavation Notes Pumped water filter Inlet Protection Silt Socks Any other BMP used, but not listed elsewhere on the checklist

79 Are the Locations Shown on the Plan Map(s)? Are Typical Details provided for Each Type of BMP? If Details are provided in the E & SPC Program Manual, do the proposed BMPs meet the standards? Are Supporting Calculations provided where needed?

80 102.4(b)4 Earth disturbance activities shall be planned and conducted to minimize the extent and duration of the disturbance.

81 Seed Lime Fertilizer Mulch Others Types D Rates D PERMANENT STABILIZATION Seed Lime Fertilizer Mulch Others Types D Rates D

82 Is the Information on Standard Worksheet #7 provided? Is temporary stabilization called for immediately? Is a suitable Mulch Specified at a minimum of 3 tons per acre?

83 Is the Information on Standard Worksheet #7 provided? If there are Disturbed Areas with Slopes > 3:1 (H:V), is a Steep Slope Seed Mixture provided? Is the Liming Rate 6 Tons/acre or per Soil Test? Fertilizer Is it 1000 lb/acre of or per Soil Test? THE ONSITE SOIL TEST IS RECOMMENDED!! Is a suitable Mulch Specified at a minimum of 3 tons per acre?

84 Does the Plan Require All Seeded Areas to be Mulched? Is the Hay or Straw Mulch Rate 3 Tons/acre? Is netting specified for slopes > 3:1? Is Wood Cellulose Limited to Slopes < 3:1 (H:V) with straw or hay mulch?

85 102.4(b)(5)(x) A maintenance program which provides for inspection of BMPs on a weekly basis and after each measurable rainfall event, including the repair of the BMPs to ensure effective and efficient operation. Inspection schedule Maximum sediment storage elevation D Time frames for completing maint. Site Stabilization repair parameters D Disposal directions for sediment D D D

86 Does the Plan specify Weekly Inspections as well as After Each Runoff Event? Are the Maximum Sediment Storage Levels in the BMPs Identified? (usually with detail notes) Are Specific Time Frames for Completing Required Maintenance stated for Each BMP Type? (immediately) Are Specific Instructions given for Each BMP Type? (usually included at detail notes) Is a Means of Disposing Sediment from the BMPs provided?

87 102.4(b)(5)(i) Procedures which ensure that the proper measures for the recycling or disposal of mat3erials associated with or from the project site will be undertaken in accordance with Department regulations. Project construction wastes identified N Directions for recycling/disposal D Soil/rock disposal areas provided D & N

88 Are the Construction Wastes (e.g. Sediment, Used Silt Fence, Filter Bags, etc.) Identified? Are Directions for their Recycling/Disposal provided? Are Off-site Waste & Borrow Areas Identified? Are adequate E & SP Control Plans provided for all such Sites?

89