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| Acronym | Acronym Meaning | Additional Information |
|---|---|---|
| L | Lead –based paint (CERFA specific) | |
| LAA | Lead Agency Attorney | |
| LADCO | Lake Michigan Air Directors Consortium | |
| LADD | Lifetime Average Daily Dose | |
| LADD | Lowest Acceptable Daily Dose | |
| LAER | Lowest Achievable Emission Rate | |
| LAI | Laboratory Audit Inspection | |
| LAMP | Lake Acidification Mitigation Project | |
| LC | Lethal Concentration | |
| LC | Liquid Chromatography | |
| LCA | Life Cycle Assessment | |
| LCD | Local Climatological Data | |
| LCL | Lower Control Limit | |
| LCM | Life Cycle Management | |
| LCRS | Leachate Collection and Removal System | |
| LCS | Laboratory Control Sample | |
| LD | Light Duty | |
| LD | Land Disposal | |
| LD | Lethal Dose | |
| LD L0 | The lowest dosage of a toxic substance that kills test organisms. | |
| LDCRS | Leachate Detection, Collection, and Removal System | |
| LDD | Light-Duty Diesel | |
| LDDT | Light-Duty Diesel Truck | |
| LDDV | Light-Duty Diesel Vehicle | |
| LDGT | Light-Duty Gasoline Truck | |
| LDIP | Laboratory Data Integrity Program | |
| LDR | Land Disposal Restrictions | |
| LDRTF | Land Disposal Restrictions Task Force | |
| LDS | Leak Detection System | |
| LDT | Lowest Dose Tested | |
| LDT | Lowest Dose Tested | |
| LDV | Light-Duty Vehicle | |
| LEAP | Learning and Environmental Awareness Partnership | |
| LEL | Lower Explosive Limit | |
| LEL | Lowest Effect Level | |
| LEP | Laboratory Evaluation Program | |
| LEPC | Local Emergency Planning Committee | |
| LERC | Local Emergency Response Committee | |
| LEV | Low Emissions Vehicle | |
| LFB | Laboratory Fortified Blank | |
| LFG | Landfill Gas | |
| LFL | Lower Flammability Limit | |
| LGR | Local Governments Reimbursement Program | |
| LHDDV | Light Heavy-Duty Diesel Vehicle | |
| LI | Langelier Index | |
| LIDAR | Light Detection and Ranging | |
| LIMB | Limestone-Injection Multi-Stage Burner | |
| LLRW | Low-Level Radioactive Waste | |
| LMOP | Landfill Methane Outreach Program | |
| LMRBR | Liquid Metal Fast Breeder Reactor | |
| LMTF | Lake Michigan Task Force | |
| LNAPL | Light Non-Aqueous Phase Liquid | |
| LOAEL | Lowest-Observed-Adverse-Effect-Level | |
| LOD | Limit of Detection | |
| LOD | Letter of Deficiency | |
| LOW | Letter of Warning (IDEM Enforcement) | |
| LPC | Land Pollution Control | |
| LPG | Licensed Professional Geologist | |
| LQER | Lesser Quantity Emission Rates | |
| LQG | Large Quantity Generator | |
| LRTAP | Long Range Transboundary Air Pollution | |
| LSA | Legislative Services Agency | |
| LTF | Land Treatment Facility | |
| LTTD | Low Temperature Themal Desorption | |
| LUIS | Label Use Information System | |
| LUST | Leaking Underground Storage Tank |
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