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3 t <br /> three consecutive readings show the parameters are stabilize(i)a groundwater sample is collected from <br /> the tubing port in front of the flow through cell of the meter. <br /> Water samples will be collected from the tubing and carefully poured into 40-milliliter (ml) glass vials <br /> preserved with hydrochloric acid. The vials wil be filled to produce a positive meniscus and sealed with a <br /> cap containing a Te on® s ptum, 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 /> 82608. {E <br /> If you have any questions concerning the proposed changes in the scope of work please contact the <br /> undersigned at (925) 460-5300. I <br /> Respectfully submitted, <br /> ATC ASSOCIATES INC. <br /> P <br /> eter Kolodner Scott Perkins <br /> Project Manager Senior Project Manager <br /> `-��- <br /> Q9xoNAL GFo July 24. 2009 <br /> � �/ 5 foo Date <br /> David A. Evans, P.G. a DAVIDAEVANS <br /> California Professional Geologist No.3823 <br /> No. 8623 m� <br /> 9TFCF CA��F�Q <br /> s <br /> Attachments: <br /> Revised Proposed Boring Location Map <br /> Regulatory Correspondence <br /> Additional Investigation Workplan, May 18, 2009 <br /> U. e �� Additional Investigation Workplan Addendum <br /> Quik Stop No.132,Stockton,CA <br /> .... July 28,2009 ! <br /> r <br />