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| Acronym | Acronym Meaning | Additional Information |
|---|---|---|
| D | Disqualified Parcel (CERFA specific) | |
| DAF | Dilution Attenuation Factor | |
| DAG | Deputy Attorney General | |
| DAPSS | Document and Personnel Security System (IMD) | |
| DB | Decibel | |
| DBP | Disinfection By-Product | |
| DC | District of Columbia | |
| DCI | Data Call-In | |
| DCO | Document Control Officer | |
| DCO | Delayed Compliance Order | |
| DCPA | Directorate of Personnel and Community Activities | |
| DDT | 4,4-DichloroDiphenylTrichloroethane | |
| DEM | Department of Environmental Management (Indiana) | |
| DERP | Defense Environmental Restoration Program | |
| DERs | Data Evaluation Records | |
| DES | Diethylstilbestrol | |
| DfE | Design for the Environment | |
| DHS | U.S. Department of Homeland Security | |
| DI | Diagnostic Inspection | |
| Dir. | Director (IDEM) | |
| DIS | Directorate of Installation Support | |
| DIY | Do-it-yourselfer (Those who change their own motor oil and take the oil to a used oil collection site) | |
| DMR | Discharge Monitoring Report | |
| DMS | Document Management System | |
| DNA | Deoxyribonucleic acid | |
| DNAPL | Dense Non-Aqueous Phase Liquid | |
| DNR | Indiana Department of Natural Resources | |
| DO | Dissolved Oxygen | |
| DOC | Demonstration of Capability | |
| DOC | U.S Department of Commerce | |
| DOD | U.S. Department of Defense | |
| DOE | U.S. Department of Energy | |
| DOI | U.S. Department of Interior | |
| DOJ | U.S. Department of Justice | |
| DOL | U.S. Department of Labor | |
| DOR | Indiana Department of Revenue | |
| DOT | U.S. Department of Transportation | |
| DOW | Defenders Of Wildlife | |
| DP | Drip Pad | |
| DPA | Deepwater Ports Act | |
| DPCA | Directorate of Personnel and Community Activities | |
| DPD | Method of Measuring Chlorine Residual in Water | |
| DPE | Dual Phase Extraction | |
| DPT | Direct Push Technologies | |
| DQA | Data Quality Assessment | |
| DQO(S) | Data Quality Objective(s) | |
| DRE | Destruction and Removal Efficiency | |
| DRES | Dietary Risk Evaluation System | |
| DRMO | Defense Reutilization and Marketing Office | |
| DRMS | Defense Reutilization and Marketing Service | |
| DRR | Data Review Record | |
| DS | Direct Push Soil | |
| DS | Dichotomous Sampler | |
| DSAP | Data Self Auditing Program | |
| DSCF | Dry Standard Cubic Feet | |
| DSCM | Dry Standard Cubic Meter | |
| DSS | Decision Support System | |
| DSS | Domestic Sewage Study | |
| DT | Detectors (radon) damaged or lost | |
| DT | Detention Time | |
| DTW | Depth To Water | |
| DU | Dobson Unit | |
| DU | Ducks Unlimited | |
| DU | Decision Unit | |
| DUC | Decision Unit Coordinator | |
| DW | Direct Push Water | |
| DW | Drinking Water | |
| DWB | Drinking Water Branch (IDEM) | |
| DWEL | Drinking Water Equivalent Level | |
| DWS | Drinking Water Standard | Contaminants & MCLs (EPA)  |
| DWSRF | Drinking Water State Revolving Fund |
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