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ENVIRONMENTAL MONITORING PLAN The potential hazards identified in the hazard analysis portion of this SSHP determined the need for initial and/or ongoing monitoring for assessment of exposure to the hazards as follows. The direct-reading instrument that will be used to monitor air quality in and around the work areas is the Flame Ionization Detector (FID). The FID measures the total organic vapors present in the ambient air. For health and safety purposes, total organic vapors detected will generally be used to confirm the selection of protective equipment. The FID will be calibrated prior to each day's activities using 100 ppm hexane in air as the standard. Air monitoring for background levels of air contamination upwind of the project will be performed prior to the start of field activities. Monitoring with the FID will be conducted a minimum of every 15 minutes. At any time the FID reading shows a sustained concentration greater than 2 ppm, air-purifying respirators will be worn by all personnel at that work location. If at any time during field activities, the FID reading at the breathing zone reaches or exceeds 4 ppm, work will be discontinued and field personnel will move away from the area until lower readings are obtained. If FID readings indicate consistent organic vapor concentrations greater that 4 ppm, then work will stop and the level of PPE will be reevaluated by the SSO in conjunction with the PM and HSO. Heat stress and noise will be monitored as described in the hazard analysis portion of this SSHP. MEDICAL SURVEILLANCE REQUIREMENTS There will not be any special medical tests or examinations required for staff involved in this project. Medical surveillance is conducted as a routine program for field staff which meets the requirements of 29 CFR 1910.120 (f) and 8 CCR 5192 (f). This program includes baseline medical examinations for field work certification and annual follow-up examinations. Special medial tests or examinations are not anticipated for field personnel assigned to this project. The medial surveillance program is conducted under the guidance of an occupational medicine physician who established the medical exam protocol and certification requirements. All subcontractor personnel directly involved with the field work must also meet the medical surveillance requirements of 29 CFR 1910.120 and 8 CCR 5192. SITE CONTROL MEASURES This section describes the general facilities and site-specific control measures for this project. The potential chemical and physical hazards have been identified in this SSHP; however, should unexpected conditions arise, the SSO will stop all work at the site and notify the 9 0101/9TE M0S\2099209243\SSHP-GPC.D0C