ARCHIVED REPORTS XR0008518 - Laserfiche WebLink

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' ,eob ua(Technccs Inc • Page 2 Wor Plan g Valentine(Castle Motors) Project No 723 2 April 11, 2000 2.1 GeoProbelHydropunch Survey The GeoProbe boreholes will be located as shown in the Site Map (Figure 2) It is proposed to drill the majority of the borings at the edges of the city streets or through planters in the sidewalk Encroachment agreements will be obtained from the city prior to drilling The final locations of the borings may have to be adjusted slightly in the field according to utilities or accessible points The boreholes will be drilled with a GeoProbe rig owned and operated by V&W Drilling of Rio Vista, CA (C574 720904) The GeoProbe advances a coring tool with a pneumatic hammer to a selected depth Upon reaching that depth, the coring tool is opened and advanced further to fill the core barrel The soil sample enters an acetate cylinder contained in the coring tool Upon filling, the coring tool is pulled from the hole and the cylinder is removed The cylinder is then cut and the selected interval is capped with Teflon foil and end caps and placed on ice for shipment to the laboratory The remainder is used for geologic logging The GeoProbe borings will be advanced to a total depth of 30 feet bgs Soil samples will be collected at five-foot intervals One soil sample from the capillary fringe of each borehole will be submitted to the laboratory for analysis Upon reaching the groundwater, a hydropunch type sampling tool will be driven into the saturated zone The hydropunch will be pulled back two feet to expose the screen then a 10 Wattera sampling tube will be used to collect a groundwater sample The samples will be collected into VOA vials and amber liter bottles The VOA vials are capped, inverted, tapped, and checked for headspace bubbles The vials and bottles will be labeled and placed on ace for shipment to the laboratory Clean surgical gloves are worn at all times :n handling the samples and sampling equipment 2.2 Soil & Groundwater Sample Analyses One soil sample from the capillary fringe of each borehole and one groundwater sample from each borehole will be submitted to Sherwood Laboratories of Hilmar (State Certified Laboratory #1400) These samples will be analyzed for e BTEX using EPA method 8020 with appropriate extraction method a TPH-G (gasoline) using method 8015 modified with appropriate extraction method a Oxygenated Fuel Compounds (OFCs) using method 8260 ' A Chain of Custody will be completed for all samples collected and tracked to ensure sample integrity The detection limits for these compounds are listed below ' Detection Limits - Ethers 8020 8015m 8260 8260 t of (pg/Kg , iter µg