CHAPTER II, SECTION 3 was removed before each test. The connected load was 8 KW. Distribution was through a 16-circuit 120/208 volt, 3-phase, 4-wire lighting circuit breaker panel. Two 20-amp, 120-volt and one 130-amp, 120-volt receptacles provided outlets for scientific power; two 20-amp, 120volt receptacles provided the power required for ventilation and dehumidification; and one 20amp, 120-volt receptacle provided the power for a battery charger. Seven timing signals were provided by an EG&G furnished radio. Contractor furnished equipment included a small portable type room humidifier, a 280-gallon steel oil storage tank and a 7-inch exhaust fan which was installed in the 8” pipe vent in the battery room. Station 312.01 had 23 cubic yards of concrete poured at an average 28-day strength of 4,950 psi, 312.02 had 23 cubic yards at 4,250 psi, 312.03 had 23 cubic yards at 4,400 psi and 312.04 had 22 cubic yards at 4,070 psi. STATIONS: PURPOSE: SITE: USER: PARTICIPATION: CONSTRUCTION: OCCUPANCY: 313.01 thru .06 Pressure versus Time and Velocity versus Time at 25 Feet Charlie-Dog Reef DOD-3 18 2-29-56/4-25-56 4-29-56 These stations were 8” diameter 25’-4” high masts which were guyed at the 13’ and 23’ levels. Each station required a concrete mast footing and three concrete guy anchor blocks. User-furnished and installed gages were located at the 10’ and 25’ levels of the stations and were oriented toward ground zero. Cable was run from the gages to the 312 series recording shelters. Forms and guy rods were fabricated at Nan. The design of the anchor block layout had to be changed to meet field conditions, which in turn necessitated changing the guy rods. This was met by welding sections of +12 rebar to the fabricated guy rods. The following amounts of concrete were poured for each sta- tion: Station 313.01, 52% cubic yards at an average 28-day strength of 3,675 psi; 313.02, 52% cubic yards at 2,700 psi; 313.03, 52% This station was a tent and shed structure with a wooden floor set on dirt, located at the north end of the island. It was used as a shelter for a User-furnished and installed rack containing timed shutters over holes for the purpose of checking flash blindness to monkeys. A clear line of sight was required to Stations 3, 6, 19 and 24. An animal exercise cage, Building 149, was used in support of this project. Two 5 KW generators with automatic switchover gear provided for service and stand-by power. Timing signals of minus 15 minutes, 244 seconds, and one second, and two blue boxes were required. STATION: 411.01 SITE: USER: PARTICIPATION: CONSTRUCTION: OCCUPANCY: Nan DOD-4 13, 18 and 22 2-25-56/5-4-56 5-7-56 PURPOSE: Flash Blindness and Blink Measurements Station 411.01 was an earth embankment 50 x10 at the top with a concrete slab covering the entire area and set at elevation plus 15’. Two 21’x 10 concrete ramps extended down the sides of the embankment. Tie-down anchors in the slab were provided to secure two 214 ton flat-bed trailers on which racks were placed. The racks were the same as described for Station 410.01. Power in the amount of 5 KW was supplied by island distribution with emergency back-up from an engine generator. Timing signals of minus 15 minutes, 5 seconds, 244 seconds, and 1 second, and two blue boxes were required. A total of 21 cubic yards of concrete with a 28-day strength of 3,450 psi was poured. STATION: PURPOSE: SITE: USER: 411.02 Flash Blindness and Blink Measurements How DOD-4 PARTICIPATION: 13, 18 and 22 CONSTRUCTION: 6-7-56/6-30-56 This station was an earth embankment cubic yards at 2,700 psi; 313.04 and .05, 52% cubic yards at 3,850 psi and 313.06, 53 cubic yards at 3,850 psi. with tie downs for securing animal cages. The STATION: PURPOSE: STATION: SITE: USER: 410.01 Flash Blindness and Blink Measurements David DOD-4 PARTICIPATION: 3, 6, 19 and 24 CONSTRUCTION: 4-9-56/4-26-56 installation also included a generator and power cable. No concrete was poured. PURPOSE: 550.01 Aircraft Positioning SITE: Fred USER: DOD-5 PARTICIPATION: 1, 3, 4, 5, 6, 23 and 24 CONSTRUCTION: 2-20-56/2-22-56 Page 2-73