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3.0 SOIL AND GROUNDWATER SAMPLING <br /> �• 3.1 SOIL AND GROUNDWATER SAMPLING <br /> Prior to sampling, individual boring locations were cleared using USA notification processes as <br /> well as a private utility locating service.Underground pipelines and conduits which were identified <br /> within the boring area were marked on the surface. <br /> A Health and Safety Plan,prepared by Ceres Associates,was used to facilitate a pre-drilling safety <br /> meeting prior to conducting work. Signatures of attendees were collected at the meeting indicating <br /> an understanding of the risks and hazards involved in the drilling process. A copy of this document <br /> was kept on site during the drilling process. <br /> A permit from the San Joaquin County Environmental Health Department (EHD) was approved <br /> prior to the colmnencement of sampling activities (refer to Appendix -Permits) . Soil and <br /> groundwater sampling followed the approved workplan provided to the EHD(refer to Appendix - <br /> Workplan). An inspector from the EHD was on-site to observe the grouting of borings. <br /> PURPOSE OF BORING LOCATIONS <br /> Two borings were placed in the reported down-gradient groundwater flow direction from the suite <br /> (north of the building), and one boring was placed up-gradient of the suite (south of the building). <br /> Typically if soil and groundwater containination exists at a dry cleaners its source area is a <br /> depression in the asphalt near he back door of the dry cleaner. The borings were placed as close <br /> to the fozxner dry cleaning suite as practically feasible given the building location, sidewalks, and <br /> utilities locations (refer to Fig re 2 - Soil Boring Location Map) . <br /> SAMPLE METHODOLOGY <br /> a� <br /> Soil and groundwater samples were collected using Geoprobe® sampling equipment provided by <br /> ;r Vironex of San Leandro, California. The Geoprobe® sampler utilizes direct-push technology to <br /> collect soil and groundwater samples from specific subsurface depths without generating soil <br /> cuttings. The Geoprobe©sampling system consists of series of 1.5-inch diameter hollow stainless <br /> steel rods which are hydraulically driven into the ground using a pneumatic hammer attached to <br /> the Geoprobe® assembly. <br /> L& <br /> Soil Sampling <br /> Soil samples were collected by driving a four-foot long stainless steel sample sleeve attached to <br /> w the end of the steel rods into soil at a specified sample depth. Soil samples were then collected in <br /> Ceres Associates 4 Project CA1156-2 <br /> 4�n Cathay Bank(Former Valley Cleaners,Tracy) January 12,2004 <br /> it <br />