Field records • download and walkthroughMethod 9 observation form
Method 9 observation form
and instructions.
Record the source, observer, conditions, and time alongside your readings. Download EPA’s observation form and instructions, then review the example below to see how to fill in the reading grid.
Download EPA form + instructionsBefore the first reading01 · Identify the sourceDocument the facility, process, control equipment, and the emission point. Include enough detail to distinguish the emission point from nearby outlets. 02 · Describe the viewRecord the observer’s position, distance, background, weather, and relevant plume conditions. Include the source-layout sketch. 03 · Record the readingsKeep each reading tied to its observation time. Document changing conditions and explain missed observations. 04 · Finish the recordCheck the observer information and certification date, sign where required, and retain the form and related records under your applicable requirements.
Record what someone reviewing the observation needs.
Annotated example • fictional data
01 02 03
Read a row from left to right.
Each row below has four timed entries. The fictional data illustrates the reading grid; it is not a completed compliance observation.
| Minute | :00 | :15 | :30 | :45 | Comments |
|---|---|---|---|---|---|
| 1 | 10% | 15% | 10% | 10% | No change noted |
| 2 | 10% | — | 15% | 10% | :15 missed; view obstructed |
Match each reading to its time
The second column is the minute’s :00 observation; the next columns correspond to :15, :30, and :45.
A gap needs a comment
EPA’s instructions use a dash for a missed reading and an explanation beside it. A missed observation is not a zero-opacity reading.
Complete the rest of the form
This small excerpt omits the rest of the form. Include source details, conditions, the sketch, and observer information in the actual record.
A record with a missing observation should not be treated as a complete set of consecutive readings. Follow the method and applicable requirement when completing the observation and calculating results.
From paper to digital records
Keep the readings and their context together.
With a digital VEO workflow, you can organize field entries alongside your Method 9 program records. Opacity Vision keeps observer, facility, and certification records in one platform.
Use the software overview to explore the workflow, or contact us to discuss your form and recordkeeping requirements.
A form is a record of an observation. It is separate from the observer’s certification record.
Sources: EPA Instructions for Use of Visible Emissions Observation Form and EPA Method 9. The downloadable EPA document is reproduced unchanged.