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DAY OR NIGHT CERTI �' ICATE TELEPHONE NO. 2971z" (510) 236-1393 CERTIFIED SERVICES COMPANY CUSTOMER 255 Parr Boulevard • Richmond, California 94801 JOB NO. 5209224 HENDERSON CONST. FOR: ECOLOGY CONTROL INDTANK NO. 26792 LOCATION: RICHMOND,CA DATE: 7t28f99 TIME:1150.43 TEST METHOD VISUAL GASTECHf1314 SMPN Uta LAST PRODUCT This Is to certify that I have personally determined that this tank Is In accordance wlth 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 GALLON TANK CONDITION S'A'FE FOR FIRE REMARKS: OXYGEN 20.9%LOWER EXPLOSIVE LIMIT LESS THAN 0.1%ECOLOGY CONTROL INDUSTRIES HERBY CERTIFIES THAT THE ABOVE NUMBERED TANK HA8 BEEN CUT OPEN,PROCESSED, AND THEREFORE DESTROYED AT OUR PERMITTED HAZARDOUS WASTE FACILITY. TUG Teter cutpacn m t is FOR PROCESSING In the event of any physical or atmospheric changes affecting the gas-free conditions of the above tanks, or If In any doubt, immediately 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 permissible concentrations; and (c) In the judgment of the Inspector, the residues are not capable of producing toxic materials under existing atmospheric conditlons while malnialned 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 Ilmlt; 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 inerted, or in the case of fuel tanks, have been treated as deemed necessary by the Inspector. The undersigned 'Pres live acknowledges receipt of this certificate and understandaNT ons and Ii It i ns7under wFNich I as, 1 t I REP E ENTATlVE {� TITLE � d-L_I. CPr�(I ri.r rn�