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Work Plan Underground Storage Tank Removal 210,000-gallon UST Removal Project Newark Sierra Paperboard Mills 800 West Church Street Stockton, California SITE MOBILIZATION Prior to site activities,the excavation areas will be delineated and posted with appropriate warning signs to prevent unauthorized entry of personnel and/or ignition sources. Each of the enclosed areas will be considered a project work area. Utility Locate During the mobilization phase of the project, the Project Manager will contact Underground Service Alert and any non-affiliated Service providers to have the utilities located within the work area prior to commencement of remedial activities. Once the utilities are located,the Project Manager will ensure that locations are noted on the drawings prior to the start of any work. Any discrepancies will be brought to the attention of the HLA Project Manager. All underground and/or exposed utility lines will be located, flagged and marked. Markers will be maintained throughout the project in order to protect the utilities. Overhead lines and guy wires be interrupted due to construction,the HLA Project Manager will be notified in writing 48 hours prior to desired date of interruption. Site Layout The project site will be delineated into three separate zones: The Exclusion Zone,the Contamination Reduction Zone and the Support Zone. All travel between zones will be in strict accordance with the Site Health and Safety Plan. All boundaries will be delineated and posted,including warning signs. Zone boundaries within the project work area will be delineated with caution tape and warning signs. UNDERGROUND STORAGE TANK EXCAVATION Preparation for Excavation Ogiso Environmental will saw cut and strip away the wooden cover that would otherwise interfere with the removal of the tank. The wooden cover will be loaded into end dumps and transported to Forward Landfill for disposal as construction debris. Underground Storage Tank The underground storage tank will be exposed utilizing a Caterpillar 335 excavator or equivalent Where the excavation is approaching a known utility line,the technician will manually excavate the line until it is clearly visible by the operator. All soil will be stockpiled and covered by visqueen. 4strurmeatment of Piping associated pi be removed. However, in the event that the removal of the plumbing will cause c ra amage to a building, sidewalks, or major vegetation. Ogiso Environmental proposes to cap the linesin p nJaccordance with the Federal requirements. si C:\wPiGDMGH41017E.354 Harding Lawson Associates 1