ARCHIVED REPORTS XR0009904 - Laserfiche WebLink

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' Corrective Action Plan Page 18 of adhering soil or any contarmnatmg material and such will be removed before the concrete is loaded into trucks for transport ) When all paving material and concrete from slabs and foundations has been removed from the property, clean overburden material will removed from the surface of the site over the ' whole area contained within the estimated limits of the remedial excavation that are shown on Figure 6 Tins work will proceed in uniform lifts over the whole excavated area to the depth at which contaminated soil is first encountered This is expected to be on the order of 5 ft , but may locally be shallower in the area around the former pump island where leakage of fuel from near-surface pipes may have occurred The clean overburden material will be loaded into trucks and, at the discretion of the remediation contractor, hauled ' either to a landfill for disposal or to a temporary storage site where it will be available for re-use when the remedial excavation is backfilled ' When the remedial excavation reaches the depth of the sanitary sewer that serves the existing building on the property (see Figure 6 for approximate location) the sewer will be ' exposed at the point were it passes under the sidewalk on the East 11th Street frontage of the site The pipe will be carefully cut off at that point and the cut end will be permanently plugged in accordance with the requirements of the City of Tracy, Public Works ' Department After the clean overburden has been removed, soil affected by components of hydrocarbons will be excavated from the subsurface and loaded into trucks and transported to a soil aeration site that will be established at 475 West Blewett Road near Tracy The location of the soil aeration site is shown on Figure 9 and the proposed ' aeration methods are detailed later in this plan If the soil poses any problem of fugitive dust while it is being transported the trucks will be sheeted 1Limits of FNcavation The maximum depth and areal extent of the remedial excavation will be limited by ' whichever of the following criteria is, either singly or in combination, the most restrictive a) the maximum local depth and lateral extent of contaminated soil, b ) the boundaries of the property on the East 11th Street and "F" Street frontages c ) the remedial pit reaching a depth of 10 ft, below the ground surface, or d ) the requirement, as determined by the California-licensed, geotechnical engineer in responsible charge of the work, to contain ' any significant risk that the floor or walls of the excavation may become unstable, or that fine particles will be transported into the open excavation from surrounding strata of loose sands and silts by flowing groundwater so as the threaten the stability of surrounding ' buildings and property Damage to Public Sidewalks For planning purposes, it has been assumed that excavation to effect remediation of contaminated soil will approach as close to the boundaries of the 152 East 11th Street