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I�L.Or r x�R a WORKNgnCt € Department of cos 86&Dn PG&E Former Tracy Manufarrtured�Gas Plant 502 East Grant Line Road ` SEP 0 1 2011 Tracy, California ENVIRONMENTAL HEALTH Cleanup Work to begin August 31, 2011 DEPARTMENT The California Department of Toxic Substances Control (DTSC) has approved the cleanup plan (called a Removal Action Workplan or RAW)for(Pacific Gas and Electric Company's(PG&E)former Tracy Manufactured Gas Plant(MGP)site located at 502 East Grant Line Road in Tracy. Under DTSC's oversight, investigations conducted at the site found soil has been impacted with former MGP residues including polycyclic aromatic hydrocarbons(PAHs),total petroleum hydrocarbons(TPHs), and volatile organic compounds(VOCs). To address these impacts, DTSC approved the RAW, which authorizes excavation and off-site disposal of impacted soil, and capping excavated areas with new asphalt. The site will continue to operate as a PG&E Service Center. Work Planned: Cleanup work will begin in late August and will last about six months.Work will take place between the hours of 7:00 a.m. and 5:00 p.m., Monday through Friday with some limited work scheduled for Saturdays and evenings. Work planned for the site includes the following: • Performing an underground utility survey to identify all piping and other underground features; • Removal and demolition of asphalt paving within six areas of the site; • Phased removal of 6,350 tons—about 275 truckloads—of soil and asphalt from depths ranging from 1 to 13 feet; • Placement of excavated soil in trucks and/or bins for off-site disposal; • Backfill and compaction of excavated areas with clean, imported soil; and • Cleanup and restoration of work areas where paving was removed. The work will include the use of major construction equipment such as excavators, backhoes, loaders, compactors, and trucks to haul soil to and from the site. Community Protection Measures: To ensure that the surrounding community is protected, all work will take place in accordance with a site-specific Health and Safety Plan, which includes the following measures to lessen off-site impacts to the surrounding community: • Dust suppression activities will be performed including limiting the size of excavated areas for easy management, spraying water onto soil and work areas, covering soil piles, and covering all trucks leaving the site; • Workers will take measures to limit noise from construction including working only during hours allowed by the City and keeping noise levels below city-allowed decibel levels • Workers will monitor noise and airborne dust during all excavation activities and throughout the daytime work schedule. Truck Route: Once loaded,trucks will be tarped,visually inspected and cleaned,and directed out of the site by traffic control personnel.The trucks will exit the site by turning right (east) onto East Grant Line Road,turn left(north) on North McArthur Drive, and will continue two blocks to the 205 Freeway.