FIELD DOCUMENTS - Laserfiche WebLink

Home Browse Search

7.0 LIMITED LEAD AND ASBESTOS SURVEY Geocon performed a limited survey of suspect asbestoscontaining building materials (ACBM) and lead-containing paints (LCP) at the Site to evaluate the p tential disturbance of these materials during renovation or demolition activities at the facility. Susp ct ACBM and LCP sample locations are depicted on Figure 14. ACBM and LCP bulk sample results are presented in Tables 3 and 4, respectively.Laboratory analytical data are presented in Appendix H. 7.1 Review of Previous Building Surveys and As-Built Plans Geocon performed a review of previous surveys conducted at the Tracy Maintenance Station prior to the Site visit. Assumed ACBM and LCP quantities and 1 cations were reviewed and compared with onsite conditions at the time of Geocon's building survey. The following materials were assumed to be asbestos-containing in previous surveys: • Gypsum board wall systems; • Wall base coving and mastic; • MarliteTM wall panels and mastic; • Mudded pipe fittings (5 and 10-centimeter) [(2 and 4inch)]; • Thermal system insulation (5 and 10-centimeter) [(2 and 4 inch)]; and • Asphalt roofing materials. In previous surveys, asbestos was not detected in six samples of"exterior plaster" (stucco) used on the office, equipment building, gas house and warehouse. Approximately 13 square meters (140 square feet) of 30 by 30-centimeter(12 by 12-inch)beige floor tile and associated mastic in the office were sampled and determined to contain 2% chrysotile asbestos during previous surveys. ACBMs were not identified in the as-built plans reviewed for the Tracy Maintenance Station. 7.2 Limited Asbestos Survey Geocon's procedures for the building inspection and bulk asbestos sampling are discussed below: • Conducted a walkthrough inspection of building interiors and exteriors to identify suspect ACBM that were visually apparent at the time of oursurvey. • Recorded the location of and quantified each type of suspect ACBM identified during the building survey. Suspect ACBM were inventoried and quantified by building location. • Collected representative bulk samples of suspect ACBM using the EPA Asbestos Hazard Emergency Response Act (AHERA)protocol as follows: Project No.58225-06-146 -24- May 25,2001