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LWell Destruction Work Plan Advanced Environmental Concepts, Inc. <br /> LAll on-site employees will take reasonable precautions to avoid unforeseen hazards. After documenting their <br /> understanding of the SSP,each on-site employee will be responsible for strict adherence to all points contained <br /> herein. Any deviation observed will be reported to the SSO and corrected. On-site employees are held <br /> responsible to perform only those tasks for which they believe they are qualified. Provisions of this SSP are <br /> mandatory and personnel associated with on-site activities will adhere strictly hereto. <br /> LJob Hazard Analyses: <br /> Hazards likely to be encountered on-site include those commonly encountered when operating any mechanical <br /> equipment, such as the danger of falling objects or moving machinery. Simple precautions will reduce or <br /> eliminate risks associated with operating such equipment. <br /> L -SB&S will deliver and operate all boring equipment. Qualified personnel only will have any contact with this <br /> equipment. All on-site personnel,including the drilling contractor and his employees, are required to wear hard <br /> hats when in close proximity to equipment. Latex sampling. gloves will be worn by persons collecting or <br /> handling samples to prevent exposure to contaminants. Gloves will be changed between samples and used <br /> ones discarded,to avoid cross-contamination. Proper respiratory equipment will be worn if vapor contamination <br /> levels on-site exceed action levels as determined using a Photoionization Detector (PID). Action levels requiring <br /> respiratory apparatus will be 5-ppm-, in the breathing space. Furthermore, no on-site smoking, open flame or <br /> sparks will be permitted in order to prevent accidental ignition. <br /> LRisk Assessment Summary: <br /> Exposure to chemicals anticipated on-site include gasoline, diesel, and benzene, toluene, ethylbenzene, and <br /> xylene(BTEX). These chemicals represent a hazard because they are moderately to extremely toxic and most <br /> are highly flammable. <br /> Threshold Limit Values (TLV's), Short Term Exposure Limits(STEL's) and Toxicity levels (LD50, oral-rat), all <br /> L in mg/kg (ppm), are listed below: <br /> Compound TLV STEL Toxicity <br /> L Gasoline 200 300 A__ <br /> Diesel 50 75 <br /> Benzene 10 25 4894 <br /> Toluene 100 150 5000 <br /> L Xylene 100 150 4300 <br /> Benzene is considered an extreme cancer hazard. Applicable MSDS forms are attached. <br /> Exposure Monitoring Plan: <br /> LAir monitoring will be conducted during excavation'procedures using a TIPTMII Photoionization Detector (PID) <br /> equipped with a 10.6eV lamp, manufactured by Photovac, Inc. The PID will be calibrated to 50 ppm hexane. <br /> These air monitoring procedures will be carried out in accordance with San Joaquin Valley Unified Air Pollution <br /> Control District (SJVUAPCD) guidelines. Volatile emissions are not anticipated but will nevertheless be <br /> monitored. <br /> 7` <br /> Project: AEC 98V-1950 2 <br /> J.m <br />..r <br />