ARCHIVED REPORTS XR0011668 - Laserfiche WebLink

Home Browse Search

Clayton i�,CiRci�"t�rai 5.0 Our findings and recommendations, based on the results of this investigation, follow. • The site has been used as a banking facility since 1961. Prior to this date, two smaller buildings existed onsite. • No visible evidence of underground storage tanks was observed onsite. • No visibly: evidence of stained soil, chemical contamination, hazardous materials was observed onsite. • The electrical transformer serving the subject site is located offsite in an underground concrete vault. No leak was observed from this transformer. It is not known whether this transformer contains regulated concentrations of polychlorinated biphenyls (PCBs). • Suspect asbestos-containing building materials observed throughout the building included ceiling panels, wall coverings, pipe insulation, and floor tile. Proper sampling and laboratory analysis is the best way to confirm or deny the presence of asbestos. An asbestos survey can be deferred until renovation or demolition threatens to disturb the suspect materials. • There are no National Priority List or State of California Superfund sites within 1 mile of the subject site. • There are several listed leaking underground tanks within 112 mile of the subject site. One facility with documented groundwater contamination was located upgradient to crossgradient and within 200 feet of the subject site. This facility is the car repair shop and former Shell Gasoline station, located at 141 North El Dorado Street. Our record review revealed that a gasoline leak at this facility caused petroleum hydrocarbon contamination of the groundwater. This contamination may be migrating laterally to the east and under the subject site. • The drinking water in the building was sampled and analyzed for total lead. Lead was not detected in the sample (the detection limit was 0.002 mg/L). Based on the results of this investigation, Clayton recommends that: • American Savings Bank address the possibility of onsite groundwater contamination by installing one monitoring well on the subject site, downgradient from the car repair shop. Sampling and analysis of water from this well would determine if petroleum hydrocarbons are present in the groundwater under the subject site. • It is advisable to conduct an assessment of suspect asbestos-containing materials, including bulk sampling and analysis. This type of assessment is the best way to evaluate suspect asbestos-containing materials. An asbestos survey can be deferred until renovation or tenant remodeling threatens to disturb the suspect materials. -8- 334-M-0-rep