ARCHIVED REPORTS_XR0012312 - Laserfiche WebLink

Home Browse Search

I File No 20-3941-01 E01 KLEINFELDER April 2, 1997 1 EXECUTIVE SUMMARY ' This is a report of Kleinfelder's Limited Soil Assessment conducted on a portion of the Highway 120 / McHenry Avenue Improvement Project in Escalon, California Specifically, the areas ' detailed in this investigation were the ARCO Gas Mui Mart at 1305 Escalon Avenue (APN 225- 100-03) and the EZ-Gas Mini Mart at 1405 Escalon Avenue (APN 227-062-04) in Escalon, California Messrs Thom Clark and Doug Stidham of the City of Escalon retained Kleinfelder to ' conduct the assessment in accordance with our proposals dated March 6, 1997 Kleinfelder obtained approval of our workplan from Messrs Dale Steele and Sayed All of Caltrans, and for permitting for drilling and soil sampling from Mr Steve Sasson of the San Joaquin County Public Health Services Department Environmental Health Division (PHS/EHD) ' As a part of the field assessment, a total of four soil bonngs were advanced to a maximum depth of 50 feet below surface grade (bsg) near the underground storage tanks (USTs) on both properties Kleinfelder collected a total of 43 soil samples for logging purposes, field screening and potential chemical analysis from the borings The borings were advanced using 6-inch outside diameter hollow stem auger Chemical analysis was subsequently conducted on 20 of the soil samples None of the hydrocarbon analytes were detected in any of the soil samples analyzed Low concentrations of total lead were detected in some of the soil samples analyzed The lead concentrations present appear to be indicative of naturally occurring background concentrations ' The City of Escalon must realize that the only method of detecting if contamination exists on site as a results of either station's activities will be observation and sampling dunng site demolition and dunng the removal of the tanks and plumbing (or in the case of the ARCO station, during the limited demolition) Removal of the underground storage tank system, any piping and dispensers will require permitting through PHS/EHD Additionally, a qualified hazardous materials contractor will be necessary for the excavation, removal, transportation, etc Soil sampling by a firm such as Kleinfelder will be required under the permit. Based on the results of the samples obtained during this investigation, Kleinfelder would recommend no further investigation or clean-up as it relates to the known to it at both sites For additional details of the investigation conducted please refer to the conclusions and recommendations in Section 6 of this report This report is subject to the limitations expressed in Section 7 20-3941-01 E01/2017R005 Page 1 of 11 41997 Kleinfelder, Inc