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• SITE SAFETY PLAN OCTOBER 1 , 1990 FACILITY BACKGROUND THE SITE IS LOCATED AT 6425 PACIFIC AVENUE ON THE CORNER OF PACIFIC AND DOUGLAS AVENUE, STOCKTON CALIFORNIA. THIS SITE IS AN EXXON SERVICE STATION WHICH WAS FORMERLY REAL SITE #603. IN ORDER TO ASSESS AND DOCUMENT THIS SITE WEGE WAS CONTRACTED TO INSTALL PROBES TO MONITOR THE WATER AFTER RUNNING IT THROUGH A RSI TREATMENT UNIT. KEY PERSONNEL AND RESPONSIBILITIES MR. JACK NAPPER, REGISTERED GEOLOGIST, WILL ACT AS PROJECT SUPERVISOR. MR. NAPPER HAS COMPLETED NUMEROUS PETROLEUM CONTAMINATION ANALYSES THROUGHOUT THE CENTRAL VALLEY AND NORTHERN CALIFORNIA. GEORGE CONVERSE, PROJECT MANAGER, WILL DIRECT FIELD CHARACTERIZATION AND SAMPLING ACTIVITIES. MR. CONVERSE WILL ACT AS SITE SAFETY OFFICER. MR. CONVERSE REPORTS DIRECTLY TO MR. NAPPER, THEREBY GIVING MR. NAPPER FULL AUTHORITY TO SUPERVISE HEALTH AND SAFETY OPERATIONS. MR. NAPPER CAN BE CONTACTED 24 HOURS PER DAY AT (916) 662-4541. MR. CONVERSE CAN BE CONTACTED AT SITE DURING WORKING HOURS . JOB HAZARD ANALYSES ALTHOUGH NO HAZARDOUS LEVELS OF FUEL HYDROCARBON VAPORS ARE EXPECTED, MINOR AMOUNTS OF GASOLINE HAD BEEN DETECTED AT THIS SITE. GASOLINE AND ITS CONSTITUENTS POSE HEALTH HAZARDS IN TWO MAJOR CLASSIFICATIONS : EXPLOSIVITY AND TOXICITY. THE EXTREME FLAMMABILITY OF GASOLINE IS COMMONLY KNOWN. THE LOWER EXPLOSION LIMIT (LEL) OF GASOLINE VAPOR IS 1 . 3 PERCENT IN AIR. IF THE CONCENTRATION OF GASOLINE VAPOR IN AIR EXCEEDS 1 .3 PERCENT (13,000 PARTS PER MILLION) AND SUFFICIENT QUANTITIES OF OXYGEN ARE PRESENT, THEN THE INTRODUCTION OF SUFFICIENT HEAT, SPARK, OR FLAME WILL RESULT IN AN EXPLOSION. A LESSER KNOWN HEALTH HAZARD RESULTING FROM EXPOSURE TO GASOLINE IS TOXICITY. SEVERAL COMMON CONSTITUENTS OF GASOLINE HAVE BEEN LINKED TO VARIOUS HEALTH PROBLEMS. THE CONSTITUENTS OF GASOLINE THAT HAVE BEEN SHOWN TO CAUSE SERIOUS HEALTH PROBLEMS RESULTING FROM RELATIVELY 'MINOR EXPOSURES laI CL'uLE BENZENE, TOLUENE, meta. para, and ortho XYIJMS, ETHYL BENZENE, AND LARTHYL LEAD. TYPICAL PERCENTAGES (BY WEIGHT) OF THESE CONSTITUENTS IN GASOLINE ARE: BENZENE - 0.12-3.50%, TOLUENE - 2.73-21 .80%, meta XYLENE - 1.77-3 .87%, para XYLENE - 0.77-1 .58%, ortho XYLENE - 0.658 -2.0-80-26, AND ETHYL BENZENE - 0 . 36-2 . 86% . TYPICAL PERCENTAGE OF TE 7ZAETHYL LEAD IS NOT AVAILABLE.