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Shaving cream containing tracer compounds, such as pentane, isopropanol, isobutene, <br />propane, or butane will be used. The shaving cream will be placed prior to sampling at any <br />location where ambient air could enter the sampling system or where cross contamination <br />may occur. These locations will include, sample system connections and surface bentonite <br />seals. Sampling will not be conducted during wet conditions. Samples will be collected in <br />Summa canisters. URS will utilize a mobile laboratory during the investigation. The <br />mobile laboratory will be able analyze the sample while URS is in the field allowing for <br />sampling adjustments if tracer compounds are detected in the sample. One duplicate <br />sample will be collected during the investigation. The canister is under vacuum and allows for <br />sample collection. Samples will be analyzed using soil gas Method TO -14 for VOCs. <br />Report Preparation <br />Following the completion of the activities, URS will prepare a report summarizing the results of <br />this and the April/May investigation. <br />Schedule <br />The field activities are tentatively scheduled to begin on Tuesday, September 4, 2007, and take <br />approximately two days to complete. <br />1 <br />Stockton FMS Proposed Boring Locations. pdf Stockton FMS Soil Samples Apr -May 2007.xis <br />Stockton FMS GW Samples Apr -May 2007.x1s Stockton FMS Soil Gas Samples Apr -May 2007.xls <br />Thanks, <br />Vern Elarth, P.G. <br />Senior Geologist <br />URS Corporation <br />2870 Gateway Oaks Drive, Suite 300 <br />Sacramento, CA 95833 <br />(916) 679-2299 <br />cell: (916) 717-5045 <br />fax: (916) 679-2900 <br />This e-mail and any attachments are confidential. If you receive this message in error or are not the intended recipient, you <br />should not retain, distribute, disclose or use any of this information and you should destroy the e-mail and any attachments or <br />copies. <br />"Marcus Pierce" <mpierce@waterboards.ca.gov> <br />"Marcus Pierce" <br /><mpierce@waterboards.ca.g To <devra.lewis@us.army.mil> <br />ov> <br />cc <Vernon_Elarth@URSCorp.com>, <br />07/26/2007 07:24 PM <scott.hilyard@us.army.mil> <br />