Hazard evaluation for cutting tank 241-A-101 salt well casing Page: 1 of 65
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1. ECN 605028
ENGINEERING CHANGE NOTICE
Page 1 of Proj
2. ECN Category 3. Originator's Name, Organization, MSIN, 4. US Required? 5. Date
(mark one) and Telephone No.
Supplemental [ B.D. Board 2N170 A3-37 376-8422  Yes [X] No January 9, 1997
Direct Revision [X] 6. Project Title/No./Work Order No. 7. Bldg./Sys./Fac. No. 8. Approval Designator
Change [CRN [
Temporary n A-101 Saltwell Screen Cutting 241-A-101 N/A
Standby  9. Document Numbers Changed by this ECN 10. Related ECN No(s). 11. Related PO No.
Supersedure  (includes sheet no. and rev.)
Cancel/Void 1 WHC-SD-WM-H1E-008 Rev. 1
12a. Modification Work 12b. Work Package 12c. Modification Work Complete 12d. Restored to Original Condi-
No. tion (Temp. or Standby ECN only)
 Yes (fill out BLk.
[X] No (NA BLks. 12b, Design Authority/Cog. Engineer Design Authority/Cog. Engineer
12c, 12d) Signature & Date Signature & Date
13a. Description of Change 13b. Design Baseline Document? [X] Yes  No
Clarification added on ignition potential of swarf.
14a. Justification (mark one)
Criteria Change  Design Improvement [X] Environmental  Facility Deactivation 
As-Found [ Facilitate Const  Const. Error/Smission Design Error/Omission
14b. Justification Details
Referenced documentation described potential ignition sources that were not explicitly
discussed in the earlier revision.
15. Distribution (include na-e, MSIN, and no. of copies) ano 2-38
D.A. Bragg S5-05 R.D. Smith H5-57
G. Gault A3-37 D.T. Vladimiroff S8-05 DATE: HANFORD
J.M. Grigsby A3-37 Central Files A3-88 STA/ RELEASE
L.S. Krogsrud T4-07
C.E. Leach R1-49 II
G.W. Ryan A3-37
A-7900-013-2 (05/96) GEF095
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Board, B.D. Hazard evaluation for cutting tank 241-A-101 salt well casing, report, January 10, 1997; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc674296/m1/1/: accessed July 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.