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DAY OR NIGHT TELEPHONE CE RTIFT C A T E NO. 2 9 71 z (510) 235-1393 CERTIFIED SERVICES COMPANY CUSTOMER 255 Parr Boulevard • Richmond, California 94801 JOB NO. 5209224 HENOERSON FOR: ECOLOGY CONTRQL ItuOTANK NO. 26794 LOCATION: RICHMOND,CA DATE: 7/16r99 TIME:12:39:41 TEST METHOD VISUAL GASTECH11314 8MPN UG LAST PRODUCT This is to Certify that I have personally determined that this tank Is in accordance with the American Petroleum Instltute 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 8,000 GALLON TANK CONDITION SAFE FOR FIRE REMARKS: OXYGEN 20.9%LOWER EXPLOSIVE LIMIT LESS THAN 0.1%ECOLOGY CONTROL INDUSTRIES HERBY CERTIFIES THAT THE ABOVE NUMBERED TANK HAS BEEN OUT OPEN,PROCESSED, AND THEREFORE DESTROYED AT OUR PERMITTED HAZARDOUS WASTE FACILITY. OL Y CO IATERMITS FOR.AND H.4 FTED S1 1.rvm-- 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 permissable concentrations; and'(c) In the Judgment of the Inspector, the residues are not capable of producing toxic materiels 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 Inerted, or In the case of fuel tanks, have been treated as deemed necessary by the Inspector. The undersigned representativ acknowledges receipt of this certificate and understands th conditl ns and lima lo a under which it w U d. �EPRESE ATIVE ✓ TITLE IN P � GLI SECTOR