Appendix B . CRATER SURVEY, SITE C The recovered stakes are tagged in accordance with the above. The following tabulations consist of data requested in AEC Work Order No. 575, Operation Greenhouse, and AEC Work Order No. 10 of tt “olvmns 3 and 4 preblast distance from Ground Zero was ‘. ced to the center of the stake. The post- current operation. Table B.1 contains the data obtained for the 4-ft lengths of 3-in pipe. These were recovered during the completion of the survey work, 10 March 1952 to 12 March 1952. The pipes were delivered to the Warehouse Department for shipment to Edward J. Zadina, Los Alamos Scientific Laboratory, P. 0. Box 1663, Los Alamos, N. Mex. The following explanations apply to the columns in Table B.1. “a5: neagurement was made to the approximate center of the straight portion. The distance and azimuth were taken to the samepoint. Column 5 The postblast ground elevations were taken _ on 17 July 1951. Column 7 The deflection of the bent portion of the stake is reckoned clockwise from the line from the stake to Ground Zero. Column 2 The crater survey stakes are indicated by a numberfollowed by a dash and the letter “C.” The numbering follows the orderof listing in letter SDF-649 up to and including number 27-C. The next in order was assigned 28C-28C;the remainder are in sequence from 28-C to 37-C. Column 8 The deflection of the straight portion of the stake is from a vertical line through the bottom Sef the straight portion. paseo 215 28 debild 26