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1 .0 Introduction <br /> CH2M HILL has prepared this sampling and analysis plan to assess the potential presence <br /> of hazardous waste constituents in soil along the proposed Folsom South Canal Pipeline <br /> Connection Alignment 2 for the East Bay Municipal Utility District(EBMUD). <br /> In preparing this sampling and analysis plan,CH2M HILL: <br /> • Reviewed the regulatory database for sites along the proposed alignment <br /> • Performed site reconnaissance activities on December 9, 1996 <br /> • Reviewed aerial photographs of the alignment <br /> 1.1 Purpose ' <br /> The specific purpose of this sampling and analysis plan is to: <br /> • Determine the general type and concentration of constituents of concern (COCs) in soil <br /> within the proposed project alignment <br /> • Evaluate whether soils along the proposed alignment are likely to be handled as <br /> hazardous waste,and if so <br /> • Estimate the additional cost for handling and disposing of soils generated during <br /> pipeline construction <br /> 1.2 Site Description and Setting <br /> The proposed pipeline Alignment 2 is approximately 16 miles long,extending from the <br /> Mokelumne Aqueduct near Stockton,San Joaquin County, to the Folsom South Canal in <br /> Sacramento County(Figure 1).The northern portion of the alignment is characterized by <br /> flat terrain that gives way to undulating topography in the southern portion.The alignment <br /> cuts across Dry Creek in the north and the Mokelumne River in the south. Dry Creek and <br /> Mokelumne flow west in accordance with the regional gradient. <br /> The project area is located in the Great Valley geomorphic province near the border with the <br /> Sierra Nevada province.The dominant geologic structure is the northwest-southeast- <br /> trending asymmetrical syncline underlying the valley.No faults have been mapped in the <br /> study area. The principal geologic units through which the alignment cuts are the Laguna <br /> Formation and the Mehrten Formation.The Mehrten Formation is Miocene to Pliocene-age <br /> and is comprised of andesitic conglomerate,sandstone,mudstone, and volcanic mudflows. <br /> The Laguna Formation is Pliocene-age and is comprised of gravel,sand,and silts with some <br /> interbedded Mehrten Formation. <br /> SFO/FOLSAMPL.000 1 <br />