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LEACHATE Good To the Last Drop

WHAT ARE WE GOING TO COVER  What is Leachate?  Where does Leachate come from?  How do we manage Leachate?  How do we measure Leachate levels?  How to identify the Point of Compliance?  How to calculate Compliance?  What happens to the Leachate collected?

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WHAT IS LEACHATE?

 Coffee?

 Organic Vegetable Soup?

 Garbage Juice?

 ALL OF THE ABOVE!!

WHERE DOES LEACHATE COME FROM?

 Rain

  Incoming Waste

 Recirculated Liquids

  Introduced Liquids

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How Much Leachate Is Generated

 A 1-inch Rainstorm

  Falling on an Active Working Face

(50-feet by 100-feet)

 Generates 3,116 Gallons of Leachate

  Liners

 Collection Layer

 Collection Trenches

 Collection Lines

  Leachate Sumps

  Leachate Collection Risers

  Leachate Pumps

Geosynthetic Clay Liner

Geocomposite

Flexible Membrane Liner

Compacted Soil Subgrade

Protective Soil Cover

HOW DO WE MANAGE LEACHATE? Solid Waste

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Liners

60-mil High Density Polyethylene

Collection Layer

200-mil Geonet with 10-oz Geotextile or Soil Drainage Layer

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Collection Trench Geotextile wrapped and Aggregate filled

Collection Lines

Perforated HDPE Pipe placed in Trench

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Leachate Sump

Geotextile wrapped, Aggregate filled

Leachate Collection Riser

HDPE Pipe up slope from Leachate Sump

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Leachate Pump

MEASURING LEACHATE

  Level Indicator

  Sounding

 Water Tape

 Dedicated Transducer

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MEASURING LEACHATE DEPTH

Level Indicator Sounder

Water Tape

Most Accurate CHEAPEST Alternative

MEASURING LEACHATE DEPTH Dedicated Transducer

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A Demonstration

How To Measure Leachate Compliance SUMP 1

Riser Length = 65-Feet

ALWAYS MEASURE THIS Compliance Length = 50.0 Feet Provided by Site Design Engineer

SUMP

PROTECTIVE SOIL LAYER 1-Foot

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Leachate Level Calculations GIVEN: Riser Length = _____ Feet Compliance Length = _____ Feet

MEASURE: Riser Length = _____ Feet Length to Leachate = _____ Feet

CALCULATE: Compliance Length =_____ Feet -Length to Leachate =_____ Feet

Compliance Calculation ____ Feet

65.0 50.0

65.0 CHECKED

(Non-Compliant if Positive)

SUMP 1

Provided by Site Engineer

How To Measure Leachate Compliance SUMP 1

Measure Length to Leachate = 47.5 Feet

SUMP

PROTECTIVE SOIL LAYER

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Leachate Level Calculations GIVEN: Riser Length = _____ Feet Compliance Length = _____ Feet

MEASURE: Riser Length = _____ Feet Length to Leachate = _____ Feet

CALCULATE: Compliance Length =_____ Feet -Length to Leachate =_____ Feet

Compliance Calculation Feet

65.0 50.0

65.0 47.5

50.0 47.5

(Non-Compliant if Positive)

NOT COMPLIANT

MORE THAN ONE FOOT

OF LECHATE ON LINER

+2.5

SUMP 1

How To Measure Leachate Compliance SUMP 2

Riser Length = 33.1-Feet

ALWAYS MEASURE THIS

SUMP

PROTECTIVE SOIL LAYER

Compliance Length = 25.6 Feet Provided by Site Design Engineer

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Leachate Level Calculations GIVEN: Riser Length = _____ Feet Compliance Length = _____ Feet

MEASURE: Riser Length = _____ Feet Length to Leachate = _____ Feet

CALCULATE: Compliance Length =_____ Feet -Length to Leachate =_____ Feet

Compliance Calculation ____ Feet

33.1 25.6

33.1 CHECKED

(Non-Compliant if Positive)

SUMP 2

Provided by Site Engineer

How To Measure Leachate Compliance SUMP 2

Measure Length to Leachate = 31.5 Feet

SUMP

PROTECTIVE SOIL LAYER

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Leachate Level Calculations GIVEN: Riser Length = _____ Feet Compliance Length = _____ Feet

MEASURE: Riser Length = _____ Feet Length to Leachate = _____ Feet

CALCULATE: Compliance Length =_____ Feet -Length to Leachate =_____ Feet

Compliance Calculation Feet

33.1 25.6

33.1 31.5

25.6 31.5

(Non-Compliant if Positive) -5.9

COMPLIANT

LESS THAN ONE FOOT

OF LECHATE ON LINER SUMP 2

How To Measure Leachate Compliance Manhole 3

Compliance Length = 54.5 Feet Provided by Site Design Engineer

SUMP

PROTECTIVE SOIL LAYER

Riser Length = 57.5-Feet ALWAYS MEASURE THIS

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Leachate Level Calculations GIVEN: Riser Length = _____ Feet Compliance Length = _____ Feet

MEASURE: Riser Length = _____ Feet Length to Leachate = _____ Feet

CALCULATE: Compliance Depth =_____ Feet -Length to Leachate =_____ Feet

Compliance Calculation Feet

57.5 54.5

57.5 CHECKED

MANHOLE 3

(Non-Compliant if Positive)

Provided by Site Engineer

How To Measure Leachate Compliance MANHOLE 3

Measure Length to Leachate = 55.1 Feet

SUMP

PROTECTIVE SOIL LAYER

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COMPLIANT

LESS THAN ONE FOOT

OF LECHATE ON LINER Leachate Level Calculations

GIVEN: Riser Length = _____ Feet Compliance Length = _____ Feet

MEASURE: Riser Length = _____ Feet Length to Leachate = _____ Feet

CALCULATE: Compliance Length =_____ Feet -Length to Leachate =_____ Feet

Compliance Calculation _____ Feet

57.5 53.5

57.5 55.1

53.5 55.1

-1.6 (Non-Compliant if Positive)

MANHOLE 3

LEACHATE DISPOSAL

 Evaporation

 Recirculation

 Off-Site Disposal

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Leachate Evaporation Pond

Leachate Recirculation

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Off-Site Disposal

WHAT WE COVERED

 What is Leachate?  Where does Leachate come from?  How do we manage Leachate?  How do we measure Leachate levels?  How to identify the Point of Compliance?  How to calculate Compliance?  What happens to the Leachate we collect?

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QUESTIONS