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CHOW ENGINEERING,INC. 7 May 2001 4.0 Controlled Access Zones To decrease safety risks, CE restricts access to the work areas on all of its sites. A controlled access zone (CAZ) shall be clearly defined by the crew superintendent (CS) as an area where a recognized hazard exists. Marking of the CAZ will be communicated by the crew superintendent, in a recognized manner, either through the use of signs, fencing, wire, tape, rope or chains. CE shall take the following steps to ensure that the CAZ is clearly marked and controlled: • All access to the CAZ must be restricted; only authorized persons shall be allowed entry; • All workers who are permitted in the CAZ shall be listed in the appropriate sections of the SP (or be visibly identifiable by the competent person prior to entry; • The site supervisor shall ensure that all protective elements of the CAZ will be implemented prior to commencing work. 5.0 Health Hazards Commensurate with information developed in previous investigations at the sites and by CE's Hazard Evaluation of the work area the preponderant expected hazards on site will involve the following. 1) Possible inhalation or ingestion of diesel fuel and lubricant range petroleum hydrocarbon impacted soil dust from sediment sampling activities, 2) Possible inhalation or ingestion of cement dust generated during the removal of the concrete pad at AOC 4, 3) Possible inhalation or ingestion of diesel fuel and lubricant range petroleum hydrocarbon impacted soil dust generated during excavation activities, and 4) Possible inhalation or ingestion of hydrocarbon impacted soil dust during loading of sediment for disposal. All work will be performed in Level "D" unless otherwise indicated by site conditions. The following presents the proposed remedial measures to mitigate the previously mentioned health hazards. Site Specific Safety Plan General Dynamics(Primex,Inc.) SWMU 21 and AOC 4 Project 3