I/A Innovative/alternative

IA Interagency agreement; interim action

IAB Information Access Branch

IALE International Association of Landscape Ecology

IAP Ion activity product

IAQ Indoor Air Quality

IAQINFO Indoor Air Quality Information Clearinghouse

ICOLP Industry Cooperative for Ozone Layer Protection

ICPIC International Cleaner Production Information Clearinghouse

IBD Inflammatory bowel disease

ICR Information collection request; Information Collection Rule

ICS Institute for Chemical Studies; intermittent control strategies; intermittent control system; incident command system

ID Integrated demonstration; identification; internal diameter

IDRISI A GIS developed by Clark University

IFD Industrial Facilities Discharge File

IMB Information Management Branch

IMSD Information Management and Services Division

IOC Inorganic chemical/compound

IDLH Immediately dangerous to life and health

IES Institute for Environmental Studies

IESWTR Interim Enhanced Surface Water treatment Rule

IFB Invitation for bid

IOU Input/output unit

IPP Implementation planning program

IR Infrared; infrared spectrometry; internal resistance

IRAA Indoor Radon Abatement Act

IRC Information resource center

IRIS Integrated Risk Information System

IRM Information resources management

ISE Ion-specific electrode

ISI Information systems inventory

ISO International Standards Organization

IT Information Technology Directorate, FEMA

JEC Joint economic committee

JIC Joint information center

JPA Joint permitting agreement

JTU Jackson turbidity unit

LADD Lowest acceptable dose

LAER Lowest achievable emission rate

LAI Laboratory audit inspection

LAN Local area network

LAPS Land Acquisition Priority System

LBP Lead-based paint

LC Lethal concentration; liquid chromotography

LCCA Lead Contamination Control Act

LCL Lower control limit

LC/LU Land Cover/Land Use (USGS)

LCR Lead and Copper Rule

LDT Lowest dose tested

LEA Local education agency

LEL Lowest effect level; lower explosive limit

LEP Laboratory evaluation program

LEPC Local emergency planning committee

LERAM Littoral Ecosystem risk assessment model

LERC Local emergency response committee

LEV Local exhaust ventilation

LFL Lower flammability limit

LI Langlier Index

LOAEL Lowest-observed-adverse-effect-level

LQG Large quantity generator

LOQ Level of quantitation

LP Linear polarization; liquid propane