313 waste storage facility training presentation · 1998 ‐combined 425 – waste storage pond and...
TRANSCRIPT
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August 2012
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1998 ‐ Combined 425 – Waste Storage Pond and 313 gWaste Storage Structure into 313 – Waste Storage FacilityI 8 i f h d d L d In 1998, main users of the standard were Land Conservation Departments and NRCS, with some use by WDNR and occasional use by consultantsby WDNR and occasional use by consultants
Minor revision in 2001, SOC team revision in 2004, minor revision in 2005
In 2012 there is now extensive use of the standard by WDNR and consultants, as well as LCD/NRCS
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John Ramsden, NRCS, Sponsor Dean Sylla, NRCS, Team Leader
M k C i WDNR Mark Cain, WDNR Gretchen Wheat, WDNR Ed Odgers then Todd Boehne WDATCP Ed Odgers , then Todd Boehne, WDATCP Ralph Hemling, WDATCP Dale Konkol, Door County SWCD, y Dave Nashold, Chippewa County LCD Paul Sebo, Washington County LCD John Roach, Roach & Associates Roger Strohm, Miller Engineers and Scientists
K i H SOC/Mik M WDATCP Kevin Hogan, SOC/Mike Murray WDATCP
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Improve/clarify standard based on experience in using standardI i f l i i h d d Improve consistency of results in using the standard
Reduce the need for variance requests SIMPLIFY SIMPLIFY Incorporate new materials or technology Incorporate changes from NRCS National Standardp g
Point out significant (not all) changes from 2005 standard
Describe hat has changed and h Describe what has changed and why
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The old standard says:y
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The new standard says: The new standard says:
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Major goal of team was to increase consistency of j g ysubsurface saturation and bedrock “calls” between users of the standardSi ifi diff i i i f il d Significant differences in interpretation of soil data to arrive at a saturation elevation had been noted between consultants and plan reviewersbetween consultants and plan reviewers
Changed the definition of bedrock Made several changes to the criteria for gathering and g g g
evaluating soil and site data to establish subsurface saturation elevation
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Old standard:
New standard:
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With respect to soil borings, the old standard says:g y
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The new standard says: The new standard says:
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The old standard defined this as:
This concept is now gone from the standardThis concept is now gone from the standard
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Added this statement to the beginning of the section:g g
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Observed saturation
Gleyed soil
Gray mottling
Soil matrix color
All done in consideration of nearby t h d f t f ttopography and surface water features
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Observed saturation is:
Gleyed Soil is:
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Gray Mottling isy g
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Soil matrix color:
??????
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A “matrix A matrix color” that appears in this
“matrix color” is the base pp
area of any of the charts
is the base color of the overall soil
This is a This is a (generally) a “depleted pmatrix”
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Stay away from it (separation distances in the tables)y y
Modify it per limited ways allowed in the standard
Ways are very similar to present standard; must demonstrate saturation is “perched” before it can be modified
Can now put drains inside of footprint, but outside of floor, if drain outlet goes through a manholefloor, if drain outlet goes through a manhole
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Current standard:
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Engineering Design Documentation and Construction g g gQuality Assurance Plan are new sections:
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C it i lit i t th i b ti Criteria now split into three main subsections:
Concrete Liners
Impoundments
Structures
Concrete Liner section is new; most of the criteria used to be in both of the other subsections and in footnotes to the tables.
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Concrete with Waterstop Structural Design (thickness) of slabs:
Crack control (Temperature and Shrinkage Steel) p gper Table A
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Concrete with Waterstop (continued)
Joint plan required All joints must have waterstop, even construction joints
C t ti Q lit A Pl i d Construction Quality Assurance Plan required Continuous inspection of waterstop installation required Steel place in top half of slab, with minimum clear distance Steel place in top half of slab, with minimum clear distance
of 1.5” Joint that are subject to loads need to be dowelled, no
k j i tkeyway joints Additional waterstop joins to be included at “stress
concentrations”
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Concrete/Soil Composite
Concrete thickness minimum 5”
R i f d i h # b 8” Reinforced with #4 bars at 18” centers
No joints requiredNo joints required
If joints are used, run the steel through the joint
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Separation distances to saturation and bedrock have increased Change in definition of bedrock
Att t d t i i t b t t bl Attempted to increase consistency between tables
Major changes have been made to Table 1 Major changes have been made to Table 1
Significant changes made to Tables 2 3 and 5 Significant changes made to Tables 2, 3, and 5
Minor changes to Table 4Minor changes to Table 4
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Driven by 2009 changes to the NRCS Ag Waste Driven by 2009 changes to the NRCS Ag Waste Management Field Handbook Appendix 10D – “Design and Construction Guidelines for Impoundments Lined with Clay or Amendment‐treated Soil
Credit for manure sealing no longer promoted by NRCS, b t ll d if ll d b th St tbut allowed if allowed by the State
10D design procedure relies heavily on years of NRCS soil mechanics lab testing and “specific discharge” mechanics lab testing, and specific discharge calculations
WI has a specific discharge limit of 500 gallons/acre/dayp g 5 g y MN has a specific discharge limit of 1/56 inch/day
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Upper 1’ of soil in all Table 1 pits must be worked up and recompacted Small pits can use WCS 204 for compaction Small pits can use WCS 204 for compaction Large pits must use WCS 300 for compaction and testing
of the upper 1’ of liner% i i lid f ll i 4% minimum manure solids for small pits, no
minimum needed for large pits Total thickness = 5’; 1’ recompacted + 4’ native soilTotal thickness 5 ; 1 recompacted + 4 native soil Clay = 5% minimum (need hydrometer test) Manure produced at farm increased to 600,000 cf Separation distances increased to 6’ Sampling frequency included in Table notes
l k f l d l Requirement to look for tile around pit location
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Middle column removed, no provision for faster permeability in soil if there is minimum 2% solids in manure
P i i t d t ’ Provisions to go deeper, up to 25’
Manure produced at farm limit increased to 600 000 cf Manure produced at farm limit increased to 600,000 cf
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EPDM added as a liner option
Soil requirements increased
% fines in soil beneath liner doubled to 40% Thickness of soil beneath liner increased from 1.5’ to 2’
for soils with PI>7; increased from 3’ to 4’ for soils with for soils with PI>7; increased from 3 to 4 for soils with no PI
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Added 2 more options for concrete/soil composite liners
” d l l b h h 8” compacted clay liner beneath concrete, with PI>12 and compacted per WCS 300
Foundry Sand liner beneath concreteFoundry Sand liner beneath concrete
Moved many of the notes to the Table to the Concrete Liner Section of the standard
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Updated Tables 7 and 8 per the National 313 standard
Moved most of the concrete criteria to the Concrete Liner section
Included new joint criteria for structures
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Wall Joints Waterstop joints required every 100 lineal feet of wall Wall waterstops to be welded to footing waterstop if a
footing waterstop is presentfooting waterstop is present If a footing waterstop is not used, cast wall waterstop a
minimum of 4” into footing If a PVC footing waterstop is not used, a hydrophyllic
waterstop must be included at the base of the wall.Fl J i t Floor Joints If there is a joint in the floor, it must continue up to the
top of the wallp
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For “listed materials” only, which includes:
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Criteria are located:
In the text of section V. C. of the standard
In Table 9 (the former Table 9 is now Table 10)
In the notes to Table 9
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Permanent Stacking Facilities must:g
Be designed to prevent run‐on and run‐off
Be operated to prevent ponding and significant hydrostatic heady
Have an operation and maintenance plan that ensures i li ith th it i i th t d dongoing compliance with the criteria in the standard
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The 313 team worked hard and sometimes passionately to improve the standard to make it better for all users,
d f h iand for the environment
W i l h th t th f d We sincerely hope that there are no unforeseen and unintended consequences………….
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