**THA Author:**                                                 Marcy Stutzman                                             
  --------------------------------------------------------------- ---------------- -------------- -- ----------------------- ------------
  **Date:**                                                       4/23/08          **Task \#:**      **Frequency of use:**   Frequently
  **Complete all information. Use as many sheets as necessary**                                                              

+----------------+----------------+----------------+----------------+
| **Task         | EEL118, Test   | **Task         | Venting and    |
| Location:**    | cave, Inj      | Title:**       | pumping down   |
|                | Tunnel         |                | vacuum systems |
+================+================+================+================+
| **Division:**  | ACC            | **Prepared     | Marcy Stutzman |
|                |                | by:**          |                |
+----------------+----------------+----------------+----------------+
| *              | CIS            | **Reviewed by  |                |
| *Department:** |                | (employee):**  |                |
+----------------+----------------+----------------+----------------+
| *              | Matt Poelker   | **Approved     |                |
| *Supervisor:** |                | by:**          |                |
+----------------+----------------+----------------+----------------+
| **Standard     |                |                |                |
| R              |                |                |                |
| equirements:** |                |                |                |
|                |                |                |                |
| **(PPE, TOSPs, |                |                |                |
| SOPs, etc.)**  |                |                |                |
+----------------+----------------+----------------+----------------+

+-------------+-------------+-------------+-------------+-------------+
| **Sequence  | **Potential | **Risk      | **Proposed  | **Risk      |
| of Job      | Hazards**   | Code**      | M           | Code**      |
| Steps**     |             |             | itigation** |             |
|             |             | **before    |             | **after     |
|             |             | m           | **Safe      | m           |
|             |             | itigation** | Procedure   | itigation** |
|             |             |             | s/Practices |             |
|             |             |             | /Controls** |             |
+=============+=============+=============+=============+=============+
| Attach      | Moving      | 0           |             | 0           |
| rough pump  | equipment   |             |             |             |
+-------------+-------------+-------------+-------------+-------------+
| Backfill    | Pressurized | 2           | Room        | 0           |
| and pump    | nitrogen    |             | ventilation |             |
| line 3x     | gas         |             | is          |             |
|             |             |             | sufficient  |             |
|             |             |             | to prevent  |             |
|             |             |             | ODH         |             |
|             |             |             | hazards. If |             |
|             |             |             | room        |             |
|             |             |             | ventilation |             |
|             |             |             | is not on   |             |
|             |             |             | (power      |             |
|             |             |             | outage), do |             |
|             |             |             | not use     |             |
|             |             |             | pressurized |             |
|             |             |             | nitrogen.   |             |
+-------------+-------------+-------------+-------------+-------------+
| Laser light | On systems  | 2           | LOTO        | 0           |
| exposure    | that        |             | devices     |             |
|             | include     |             | with        |             |
|             | lasers,     |             | personal    |             |
|             | when the    |             | danger tags |             |
|             | vacuum      |             | will be     |             |
|             | system is   |             | applied to  |             |
|             | opened      |             | all systems |             |
|             | there is a  |             | where laser |             |
|             | possibility |             | light could |             |
|             | of laser    |             | potentially |             |
|             | exposure    |             | harm        |             |
|             |             |             | workers     |             |
+-------------+-------------+-------------+-------------+-------------+
| Vent        | O           | 1           | Relief      | 0           |
| chamber     | verpressure |             | valves on   |             |
| with        | of chamber  |             | all CIS     |             |
| Nitrogen    |             |             | pump carts  |             |
| gas         |             |             | prevent     |             |
|             |             |             | pressure    |             |
|             |             |             | from        |             |
|             |             |             | exceeding 3 |             |
|             |             |             | psi. All    |             |
|             |             |             | vacuum      |             |
|             |             |             | venting     |             |
|             |             |             | will        |             |
|             |             |             | include a   |             |
|             |             |             | system with |             |
|             |             |             | an inline   |             |
|             |             |             | pop-off     |             |
|             |             |             | valve       |             |
+-------------+-------------+-------------+-------------+-------------+
| Assemble    | Lifting,    | 1           | -   Lift    | 1           |
| vacuum      | pinch       |             |     safely, |             |
| components  | points,     |             |     using   |             |
|             | opening     |             |             |             |
|             | gasket      |             |  assistance |             |
|             | packets     |             |             |             |
|             | with knife  |             | (mechanical |             |
|             |             |             |     or      |             |
|             |             |             |     human)  |             |
|             |             |             |     when    |             |
|             |             |             |     needed. |             |
|             |             |             |             |             |
|             |             |             | -   Talk    |             |
|             |             |             |     through |             |
|             |             |             |     the job |             |
|             |             |             |     before  |             |
|             |             |             |             |             |
|             |             |             |    starting |             |
|             |             |             |     to      |             |
|             |             |             |             |             |
|             |             |             |  anticipate |             |
|             |             |             |     when    |             |
|             |             |             |     and     |             |
|             |             |             |     where   |             |
|             |             |             |     extra   |             |
|             |             |             |     hands   |             |
|             |             |             |     will be |             |
|             |             |             |     needed. |             |
|             |             |             |             |             |
|             |             |             | -   Have    |             |
|             |             |             |     all     |             |
|             |             |             |             |             |
|             |             |             |   necessary |             |
|             |             |             |     tools   |             |
|             |             |             |     handy   |             |
|             |             |             |     before  |             |
|             |             |             |             |             |
|             |             |             |    starting |             |
|             |             |             |             |             |
|             |             |             |  (wrenches, |             |
|             |             |             |     gasket  |             |
|             |             |             |     pul     |             |
|             |             |             | ler/pusher, |             |
|             |             |             |             |             |
|             |             |             |    gaskets, |             |
|             |             |             |     clean   |             |
|             |             |             |     wipes   |             |
|             |             |             |     and     |             |
|             |             |             |     foil)   |             |
|             |             |             |             |             |
|             |             |             | -   Use     |             |
|             |             |             |     care    |             |
|             |             |             |     for     |             |
|             |             |             |     opening |             |
|             |             |             |     gasket  |             |
|             |             |             |     packets |             |
+-------------+-------------+-------------+-------------+-------------+
| Pump down   | Pump damage | 0           | Only people | 0           |
|             | if          |             | familiar    |             |
|             | improperly  |             | with        |             |
|             | used        |             | equipment   |             |
|             |             |             | will use it |             |
+-------------+-------------+-------------+-------------+-------------+
| Disconnect  | If pinchoff | 2           | Use care,   | 1           |
| roughing    | valve is    |             | tape sharp  |             |
| pump        | used, sharp |             | edges with  |             |
|             | edge will   |             | glass cloth |             |
|             | exist       |             | tape ASAP   |             |
+-------------+-------------+-------------+-------------+-------------+
| Turn on ion | Damage to   | 1           | Do not      | 0           |
| pump power  | pumps if    |             | leave pump  |             |
| supplies    | "start"     |             | with I\>3mA |             |
|             | circuitry   |             | unattended  |             |
|             | is used and |             | -- watch    |             |
|             | current to  |             | for pump    |             |
|             | high        |             | heating     |             |
+-------------+-------------+-------------+-------------+-------------+

When completed if the analysis indicates that the Risk Code before
mitigation for any of the steps of this task is "medium" or higher
(RC≥3), then develop a formal Work Control Document (WCD) (See [ES&H
Manual Chapter 3310 Work Control
Documents](https://jlabdoc.jlab.org/docushare/dsweb/Get/Document-16134))
for the task, attach this THA, have it reviewed and approved prior to
beginning the work in accordance to [ES&H Manual Chapter 3310 Work
Control
Documents](https://jlabdoc.jlab.org/docushare/dsweb/Get/Document-16134).