Agrichemical Agrichemical Containment Facility Containment Facility

NRCS Standard PracticeNRCS Standard Practice702702

NRCS Practice Standard 702AGRICHEMICAL CONTAINMENT FACILITY

MDA REG. 640Commercial Pesticide

Bulk Storage

MDA REG. 641Commercial Fertilizer

Bulk Storage

MDA Reg. 642Farm Bulk LiquidFertilizer Storage

ACF DefinitionACF Definition An impermeable barrier and An impermeable barrier and

containment placed or constructed containment placed or constructed on the ground where agrichemical on the ground where agrichemical storage, loading, mixing, and storage, loading, mixing, and cleanup occur.cleanup occur.

ACF PurposeACF Purpose To prevent degradation of surface To prevent degradation of surface

water, groundwater, and soil from water, groundwater, and soil from an unintentional release of an unintentional release of agrichemicals. Unintentional agrichemicals. Unintentional releases of agrichemicals may occur releases of agrichemicals may occur through spills, leaks or rinsing through spills, leaks or rinsing operations during storage, loading, operations during storage, loading, mixing, and cleanup.mixing, and cleanup.

Agrichemical Agrichemical Containment FacilityContainment Facility

Mix Load Pads for PesticidesMix Load Pads for Pesticides Secondary Containment of Bulk Secondary Containment of Bulk

Liquid FertilizersLiquid Fertilizers Operational Area for Bulk Liquid Operational Area for Bulk Liquid

FertilizerFertilizer Permanent Pesticide StoragePermanent Pesticide Storage Bulk Dry Fertilizer Storage Bulk Dry Fertilizer Storage

ACF LocationACF Location RequirementsRequirements

Private Wells - 150’Private Wells - 150’ Public Wells – Type I Public Wells – Type I

& IIA – 2000’, Type & IIA – 2000’, Type IIb & III – 150’IIb & III – 150’

Surface Waters -200’Surface Waters -200’ Fuel Tank< 1100 gal Fuel Tank< 1100 gal

40’40’ Fuel Tank >1100 gal Fuel Tank >1100 gal

5’ 5’

ConsiderationsConsiderations Farm Buildings 50’Farm Buildings 50’ Residential 200’Residential 200’ Public roads 50’Public roads 50’ Water Lines 25’Water Lines 25’ Property lines 25’Property lines 25’

OtherOther No field tile under No field tile under

ACFACF Check with local lawsCheck with local laws

LinersLiners A coating or liner will be applied to all A coating or liner will be applied to all

concrete surfaces exposed to pesticidesconcrete surfaces exposed to pesticides A coating or liner is A coating or liner is not required on not required on

concrete surfacesconcrete surfaces exposed only to bulk exposed only to bulk dry and liquid fertilizersdry and liquid fertilizers

A 30 mil liner is required on all earthen A 30 mil liner is required on all earthen dikesdikes

Follow manufacturers recommendationsFollow manufacturers recommendations

Mix Load Pad CriteriaMix Load Pad Criteria Usually constructed out of Usually constructed out of

concreteconcrete Floor must have compatible sealer Floor must have compatible sealer Reinforcement steel required in Reinforcement steel required in

the floorthe floor Must be 2’ above the high water Must be 2’ above the high water

tabletable

Mix Load Pad CriteriaMix Load Pad Criteria May be roofedMay be roofed Must have a sump point that is Must have a sump point that is

accessible from outside the accessible from outside the containmentcontainment

Must meet setback requirementsMust meet setback requirements Must have back flow prevention Must have back flow prevention

measuremeasure

Mix Load Pad SizeMix Load Pad Size 750 gallons or largest sprayer 750 gallons or largest sprayer

volume, whichever isvolume, whichever is less less Pad must be 2’ wider and 2’ longer Pad must be 2’ wider and 2’ longer

than equipmentthan equipment No rainfall added to volumeNo rainfall added to volume

MIX PADSMIX PADS

Secondary Containment Secondary Containment CriteriaCriteria

Provide storage for 110% of the Provide storage for 110% of the largest tank plus 6” rainfall plus the largest tank plus 6” rainfall plus the displacement of all tanks below the displacement of all tanks below the height of the wallheight of the wall

If roofed omit 6” rainfallIf roofed omit 6” rainfall May be constructed out of cast in May be constructed out of cast in

place concrete, earthen berms, place concrete, earthen berms, timber walls, or large concrete blockstimber walls, or large concrete blocks

Secondary Containment Secondary Containment CriteriaCriteria

Primary storage containers anchored, Primary storage containers anchored, elevated or secured to prevent flotationelevated or secured to prevent flotation

Storage containers must be labeledStorage containers must be labeled Storage building must be securedStorage building must be secured Wall cannot be more than 4 feet in Wall cannot be more than 4 feet in

heightheight Allow 2 feet minimum distance Allow 2 feet minimum distance

between tanks for inspection and between tanks for inspection and maintenancemaintenance

Secondary ContainmentSecondary Containment

Operational Area for Bulk Operational Area for Bulk FertilizersFertilizers

Operational areas shall be utilized Operational areas shall be utilized for transferring, unloading, and for transferring, unloading, and mixing fertilizersmixing fertilizers

Must hold 750 gallons or the largest Must hold 750 gallons or the largest application equipment tank, application equipment tank, whichever is whichever is less less

Must be a minimum of 10’ x 20’Must be a minimum of 10’ x 20’

Operational Area for Bulk Operational Area for Bulk FertilizerFertilizer

May be constructed out of concreteMay be constructed out of concrete A portable operational area is A portable operational area is

acceptableacceptable A closeable drain may be provided if A closeable drain may be provided if

the operational area will only be the operational area will only be used for fertilizersused for fertilizers

Permanent Pesticide Permanent Pesticide Storage CriteriaStorage Criteria

Storage will be provided that will Storage will be provided that will contain 110% of the largest contain 110% of the largest container stored in the areacontainer stored in the area

The floor shall be graded to a low The floor shall be graded to a low corner to collect concentrated corner to collect concentrated liquidsliquids

Ventilate all enclosed areasVentilate all enclosed areas

Bulk Dry Fertilizer Bulk Dry Fertilizer CriteriaCriteria

No specific size requirement No specific size requirement Must be covered with a roof or a Must be covered with a roof or a

tarptarp Note: Roofs are not a cost share itemNote: Roofs are not a cost share item

Must be stored on a ground cover Must be stored on a ground cover that is sufficiently impermeable to that is sufficiently impermeable to prevent seepage or runoffprevent seepage or runoff

Tank FoundationsTank Foundations Place tanks onto the liner according to Place tanks onto the liner according to

the manufacturers recommendationsthe manufacturers recommendations Tank supports are the sole Tank supports are the sole

responsibility of the landownerresponsibility of the landowner The design usually assumes the tanks The design usually assumes the tanks

will be elevated off the floor 6 inches to will be elevated off the floor 6 inches to keep tank valves & plumbing above keep tank valves & plumbing above anticipated liquid levelsanticipated liquid levels

Structural Requirements Structural Requirements for Concrete Floorsfor Concrete Floors

For typical farm equipment wheel loads:For typical farm equipment wheel loads: 6” thick, reinforced with steel - #4 bar 18” 6” thick, reinforced with steel - #4 bar 18”

on center both directionson center both directions The exception to the above is: The exception to the above is:

if a 30 mil flexible liner is to be applied over if a 30 mil flexible liner is to be applied over the concretethe concrete

6” thick, no reinforcing steel6” thick, no reinforcing steel 3500 psi concrete or mix from 3500 psi concrete or mix from

specificationspecification

Structural Requirements Structural Requirements for Concrete Floorsfor Concrete Floors

For these situations contact your For these situations contact your Area Engineering StaffArea Engineering Staff Semi tractor/trailer delivery vehiclesSemi tractor/trailer delivery vehicles Slabs that are greater than 50 feet in Slabs that are greater than 50 feet in

any directionany direction

Other ConsiderationsOther Considerations Locate downwind of sensitive areasLocate downwind of sensitive areas Need to allow for inspection and Need to allow for inspection and

maintenance between the tanksmaintenance between the tanks Consider alternatives to a crock Consider alternatives to a crock

sump such as a low cornersump such as a low corner Backflow prevention device - air gapBackflow prevention device - air gap

Operation and Operation and MaintenanceMaintenance

An O&M plan must be developed An O&M plan must be developed according to policyaccording to policy

O&M plan is located on eFOTG - O&M plan is located on eFOTG - adapt as neededadapt as needed

Concrete BlockConcrete Block

Earthen berm with linerEarthen berm with liner

View of sump areaView of sump area

Concrete ContainmentConcrete Containment