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s . <br /> �,- <br /> _ <br /> i <br /> SECURE <br /> t <br /> Samples will be analyzed for BTEX using EPA method 8020,and TPHG and TPHD using EPA <br /> method modified 8015. Analysis will be performed by a State certified analytical Iaboratory. <br /> V <br /> i Monitoring wells will be developed using a bladder pump and bailing until well water is clear <br /> � { <br /> and filter pack is fully developed. Prior to sampling, depth to groundwater measurements will _ <br /> be collected and the well heads will be surveyed. A gradient map will be created using a <br /> computer kriging program. <br /> Subsequent to installation, development, and stabilization of electrical conductivity, pH and <br /> temperature, groundwater samples will be collected from the monitoring wells. Groundwater <br /> samples will be collected,using a dedicated teflon bailer, sealed in a glass container,labeled and <br /> transported on ice in the above mentioned method. Samples will be analyzed for BTEX using <br /> EPA method 8020, TPHG using modified EPA method 8015, TPHD using modified EPA <br /> method 8015, and TL using EPA method 6010. <br /> A Problem Assessment Report will be prepared according to Tri-Regional Guidelines <br /> r summarizing the findings of the investigation and recommending further action,as appropriate. <br /> The field investigation will be conducted under the direct supervision of Gregory P. Stahl, <br /> California registered geologist No. 5023, who will also review the report. <br /> s <br /> r <br /> �s kUO90e.we 6 <br /> s <br />