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11%05.90 08:19 %2714 454 9800 3UJESTIC TECH 0 S"mmAkY N= This Project involves the following hazardouswa to remediation activies; the removal, decontamination, and disposal if t o underground storage tanks, and all associated piping and anci}'� a_ equipment: the removal Of dispensers, ranginxin size from 500 _/6.000 gallon capacity. dna were used for gasoline. / �60 U The basic operations associated with the tank removal work include the following: Open and sample tank contents, purge tank, excavate and stockpile material to expose tank and piping, disconnect piping from tank, decontaminate and remove piping, removve tank, clean and decontaminate tank exterior, decontaminate tank interior. collect and analyze decontamination rinsate, sample and analyze soil (stockpiled and at bottom of excavation), remove and dispose of concrete hold down slabs, anchors, and straps (metal tanks). remove and stockpile contaminated soil per tank. cut up and dispose of tank sections, transport and properly dispose of all waste generated (soil, tank residue. etc.), and backfill excavation and Pave surface. Based on the site history, a variety of chemical hazards may be encountered related to gasoline. Specified chemical substance which may be present include petroleum hydrocarbons (i. e.. naphtha)(and its constituents inculding trichloroethane and tetraethyl), benzene. toluene, ethyl benzene, xylene, and tetraethyl lead. Based on the field operations to be performed, sit personnel may be exposed to a range of physical hazards, including heat stress. noise, open excavations. 'operating equipment, vehicle hazards. contact with live Utilities- flammable/explosive atmospheres. and related hazards. Although most phases of the project may only require Level D protecticn for field personnel, some activities may necessitate the use of Level C protection. Depending on the presence of chemical contamination, the following tasks may require the use of Level C protection: tank opening and checking of contents, pumping/removal of tank residuals, excavation and sampling of contaminated soils, decontamination of tank surfaces. Air pruifying respirators (APRs) shall be used for any operation, or in any work area where total Ionizable hydrocarbon concentrations exceed 10 Ppm. Similarly, APRs shall also be worn anytime airborne concentrations of benzene are identified above 0.5 PPM, as detected using color indicationg tubes for benzene. Regardless of individual task safety requirements. all operations shall be performed in compliance with the Federal OSHA Hazardous Waste operations and Emegency Response standard, 29 CFR 1910.120 and the equivalent Cal -OSHA standard. 8 CCR 5192 > line project is anticipated to begin completed in approximately three mo 3, 1993.. and is expected to be