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ccap containing a Teflon® septum, and examined for air bubbles to avoid headspace that would allow <br /> volatilization to occur. The labeled samples will be promptly transported on ice in a thermally insulated ice <br /> chest, accompanied by a chain-of-custody record, to a California-certified laboratory. <br /> Soil and groundwater samples will be analyzed fortotal petroleum hydrocarbons characterized as gasoline <br /> (TPHg), benzene, ethylbenzene, toluene, totals xylenes (BTEX), five fuel oxygenates (methyl tert butyl <br /> ether, tertiary butyl alcohol, tertiary-amyl methyl ether, ethyl tert,butyl ether, and di-isopropyl ether), and {{ <br /> lead scavengers (ethylene dibromide and 1,2-dichloroethane) in accordance with EPA Test Method <br /> 8260B. <br /> . If you have any questions concerning the proposed changes in the scope of work please contact the <br /> undersigned at (925) 460-5300. <br /> 1 <br /> Respectfully submitted, <br /> ATC ASSOCIATES INC. <br /> C <br /> PpTer Kolodner Scott Perkins <br /> Project Manager Senior Project Manager <br /> Erj] a <br /> S�ONAL 0 November 03, 2009 <br /> p Date <br /> David A. Evans, P.G. a DAVIDA EVANS <br /> California Professional Geologist No.8623 <br /> No. 8623 <br /> 9T OQFDF CA�-�F <br /> f <br /> Attachments: a <br /> Proposed Boring Location Map-R2 <br /> Regulatory Correspondence <br /> Additional Investigation Workplan, May 18, 2009 <br /> Regulatory Correspondence <br /> Additional Investigation Workplan Addendum, July 28, 2009 <br /> E <br /> �t <br /> AdditionalinvestQuk S Workplan Addendum <br /> LLL \✓ ; ,Quik Slap No. 132,,StockYoq CA <br /> November03,2009 <br /> i <br />