R

RAC

response action coordinator

RACM

reasonably available control measures

RACR

response action completion report

RACT

reasonably achievable (available) control technology

RAMS

regional air monitoring system

RAS

routine analytical services

RAT

relative accuracy test

RATA

relative accuracy test audit

RCO

regenerative catalytic oxidizer

RCO

regional compliance officer

RCT

reference control technology

R&D

research and development

RDB

Regulatory Development Branch (EPA)

RD&D

research, development, and demonstration

RDDT&E

research, development, demonstration, testing, and evaluation

RDF

refuse-derived fuel

RDT&E

research, development, testing, and evaluation

RE

reportable event

REM

registered environmental manager

RF

response factor

RFC

request for comments

RFG

reformulated gasoline

RFP

reasonable further progress

RFP

request for proposal

RIA

regional impact analysis

RIA

regulatory impact analysis (required on all major federal rules)

RM

reference method

ROADCHEM

ROADWAY version that includes chemical reactions of BI, NO2, and O3

ROADWAY

a model to predict pollutant concentrations near a roadway

ROM

reduction of organic matter

ROM

regional oxidant model

ROM

rough order magnitude

RPD

relative percent difference

RPM

reactive plume model

RQ

reportable quantity (40 CFR pt 355, App. A (EHS) ) (40 CFR pt. 302, Table 302.4 (HS) )

RRF

relative response factor

RRT

relative retention time

RSD

relative standard deviation

RT

retention time

RTDM

rough terrain diffusion model

RTO

regenerative thermal oxidizer

RVD

relief valve discharge

RVP

Reid vapor pressure

RWC

residential wood combustion

RWCD

residential wood combustion devices

S

S

sulfur

S&A

sampling and analysis

S&A

surveillance and analysis

SAB

Science Advisory Board (EPA)

SAC

starved air combustion

SANE

sulfur and nitrogen emissions

SAP

sampling and analysis plan

SAP

scientific advisory panel

SAR

sodium adsorption ratio

SAR

special allowance reserve

SAR

start action request

SAR

structural activity relationship (of a qualitative assessment)

SARM

standard analytical reference material

SAS

special analytical services

SAS

statistical analysis system

SASS

source assessment sampling system

SAV

secondary acute value

SAV

site assessment visit

SAVR

Schlumberger assisted vapor recovery

SB

statement of basis

SB

statutory baseline

SCC

source category code

SCC

source classification code

SCCM

standard cubic centimeters per minute

SCF

standard cubic feet

SCFM

standard cubic feet per minute

SCL

secondary constituent level

SCR

selective catalytic reduction

SCS

supplementary control system

SD

standard deviation

SDC

settlement decision committee

SEAS

strategic environmental assessment system

SEP

standard engineering practice

SEP

standard evaluation procedures

SEP

supplemental environmental project

SES

secondary emissions standard

SI

international system of units

SI

site inspection

SI

spark ignition

SI

surveillance index

SIC

standard industrial classification

SID

supplementary information document

SIU

significant industrial user

SLPM

standard liters per minute

SLSM

simple line source model

SMP

site management plan

SNAAQS

Secondary National Ambient Air Quality Standards

SNAP

significant noncompliance action program

SNC

significant noncompliers

SNCR

selective non-catalytic reduction

SNL

Sandia National Laboratories

SO2

sulfur dioxide

SOx

sulfur oxides

sol

soluble

solv

solvent

SOP

site operating permit

SOP

standard operating procedure

SOR

standard oxygen required

SOSG

standard operating safety guide

SOTA

state-of-the-art control technology

SOTE

standard oxygen transfer efficiency

SOTR

standard oxygen transfer rate

SOW

scope of work

SOW

statement of work

SP

spontaneous potential

SPAR

status of permit application report

SPC

statistical process control

SPE

secondary particulate emissions

SPNSS

Standards of Performance for New Stationary Sources

spont

spontaneous(ly)

SPSS

statistical package for the social sciences

SQBE

small quantity burner exemption

SQG

small quantity generator (RCRA)

SQHUW

small quanity handler of universal waste

SRC

solvent-refined coal

SRE

system removal efficiency

SRM

standard reference method

SRU

sulfur recovery unit

SSEIS

standard support and environmental impact statement

SSP

site safety plan

SSSD

small scale short duration

SSURO

stop sale, use and removal order

STP

standard temperature and pressure

SWC

settlement with conditions