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j DAY OR NIGHT CERTIFICATE NO. 2971 � TELEPHONE (510) 235-1393 CERTIFIED SERVICES COMPANY CUSTOMER 255 Parr Boulevard . Richmond, California 94801 JOB NO. b 724 HENDERSON CONST. FOR: ECOLOGY CONTROL 1NOTAN K NO. 26793 LOCATION: RICHMOND.CA 11:51M DATE: 7f16F96 TIME: VISUAL GASTECH/1314 8MPN >dp TEST METHOD LAST PRODUCT I This is to certify that I have personality determined that this tank is In accordance with the American Petroleum Institute and have found the condition to be in accordance with its assigned designation. This certificate is based on conditions existing at the time the Inspection herein set forth was completed and is issued subject to compliance with all qualifications and instructions. TANK SIZE 10.000 GALLONTANK CONDITION SAFE FOR FIRE REMARKS: OXV43FM 20.0%L*WRPt BWPLCHMW LIMrr LEGS THAN 0.1M,I`ooLcov OOWROL iKOVOTRi1tQ HERBY CERTIFIES THAT THE ABOVE NUMI R90 TANK HAS 8P_ffN CUT OPEN,PROCEMED. AND THEREFORE DESTROYED AT OUR 1119RUITTED KAZAIRDOUS WAWrV--FACILITY. THE TANK SHIPERD TO Us FOR PRQQ=N In the event of any physical or atmospheric changes affecting the gas-free conditions of the above tanks, or if in any doubt, irnmediately stop all hot work and contact the undersigned. This permit Is valid for 24 hours if .no physical or atmospheric changes occur. STANDARD SAFETY DESIGNATION SAFE FOR MEN: Means that in the compartment or space so designated (a) The oxygen content of the atmosphere is at least 19.5 percent by volume; and that (b) Toxic materials in the atmosphere are within permlesable concentrations, and (c) In the Judgment of the Inspector, the residues are not capable of producing toxic materials under existing atmospheric conditions while maintained as directed on the Inspector's certificate. SAFE FOR FIRE: Means that In the compartment so designated (a) The concentration of flammable materials In the atmosphere is below 10 percent of the lower explosive limit; and that (b) In the judgment of the Inspector, the residues are not capable of producing a higher concentration that permitted under existing atmospheric conditions in the presence of fire and while maintained as directed on the Inspector's certificate, and further, (C) All adjacent spaces have either been cleaned sufficiently to prevent the spread of fire, are satisfactorily ineried, or in the case of fuel tanks, have been treated as deemed necessary by the Inspector. The u dersig ed repres t live acknowledges receipt of this certificate and understands t coon and stations under which I gUE r. A M �.�/, ' RE E ENTATIVE TITLE IN PECTOR 4� r' I-•-�i i i I fiFl rnnn n, n nn' isa int. .. nnr. i n i nn•,r