CHAPTERIl, SECTION 3 uo (Neg. No. W-913-3 Figure No. 2-62. STATIONS: 2420.01 through .02 SITE: Tare USER: UCRL PURPOSE: Phonex Collimators PARTICIPATION: 11, 12, 13 DESIGN PST: None CONSTRUCTION: 3-9-58 5-17-58 A 13x15x2-foot concrete slab supportea a User-furnished collimator block similar to Stations 2410.01-.03. Shielding of two opposite sides of the block was accomplished by 2-foot- thick concrete and scrap metal walls, 6 feet high and 9 feet long. The two walls were braced against overpressure by three removable steel struts between the top of the walls. About onehalf the floor slab was thickened to 3 feet to contain steel bracing members supporting the collimator blocks against overpressure. Lead brick shielding was provided on the top and front wall of the collimator block. Access holes in the slab were provided for the User-furnished vertical lift jacks used for adjustment. The en- tire structure was earth covered for protection against early events. The fill was later removed and replaced to provide a sand-bagged opening in the fill for line of sight. STATION: 2430 SITE: George Station 2300. USER: UCRL PURPOSE: Phonex Collimators PARTICIPATION: None DESIGN PSI: None CONSTRUCTION: 6-6-58/6-6-58 This station consisted of a 6-foot-high earth mound with a sand-bagged forward face. Three 14%-inch-diameter, 8-foot-long pipes were set on existing grade in the fill so that one end was clear of the front face. STATIONS: 3231.01 through .06 SITE: How USER: SC PURPOSE: Rocket Launcher Pads PARTICIPATION: None DESIGN PST: None CONSTRUCTION: 3-1-58,/4-10-58 A stabilized area 40 feet in diameter contained a 6-foot-square concrete slab in the cen- ter. A brass cap was provided on the slab, and a survey monument was established 60 feet from the slab. With the relocation of the ABMA Program, this facility was abandoned after completion of construction. Page 121