ARCHIVED REPORTS_REVISED DRYWELL CLOSURE AND INVESTIGATION WORK PLAN

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Neil O.Anderson&Associates HASP - Page 17 of 21 ' March 18,2014 ' • All removal activities will cease in the event wind conditions change creating an uncontrollable condition. • Dust monitoring stations will be placed around each AOC during soil removal operations tfor each site. Two (2) dust monitoring stations will be placed in the downwind direction of prevailing wind, and one (1) dust monitoring station will be placed in the upwind direction of prevailing wind. At all times at least one station will be placed between the ' AOC soil removal operation and the downwind school and/or residences. Exact locations of dust monitoring stations will be determined in the field based on site specific conditions at the time of the soil removal operation. These will be recorded and illustrated in the Removal Action Completion Report. We will be using the Particulate Monitor-Data RAM, pDR-1000. This unit measures ' airborne particulate concentration (dust, smoke, mists, and fumes) in real time, and sounds an audible alarm whenever the user-defined level is exceeded. It is a self calibrating machine that goes in annually for factory cleaning and maintenance. ' 12.2 Noise Use of hearing protection devices will be required whenever equipment is operated. Hearing protection devices will be made available in the event that equipment use is anticipated. Noise from on-site activities is not considered a hazard to the surrounding community because ' no excess noise will be generated from on-site activities. 12.3 Physical tPersonnel will be visually monitored for signs of heat- or stress-related illnesses or for any injury from site activities. ' 13.0 DESCRIPTION OF SITE WORK ZONES ' 13.1 Work Areas Work areas will be designated according to the recommendations in the U.S. Environmental Protection Agency's Standard Operating Safety Guides, revised June 1992. Three general zones of operation will be established in the field to reduce the potential for contaminant migration and risk of personnel exposure: ' exclusion zone • contamination reduction zone • support zone The work areas will be defined by flagging. If required, temporary fencing may be used. ' The exclusion zone is the area where contamination is identified. All personnel within it must use the prescribed levels of PPE. A checkpoint must be established at the exclusion zone's ' 902 Industrial Way•Lodi,CA 95240-209.367.3701•Fax 209.333.8303 02014 Neil O.Anderson&Associates,Inc.