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Guidelines: City of Tracy Westside Channel Outfall Project <br /> SAIC Project No. 06-6102-00-2931-030 <br /> May 21,2003 <br /> 4. If excavation activities encounter heavily impacted oil saturated soil, the general <br /> contractor may choose to conduct over-excavation of that area. Over-excavation <br /> of impacted soil should be kept to a minimum as over-excavation may increase <br /> the likely hood that further contamination will be encountered. <br /> 5. If free phase oil is seeping into the trench excavation, SAIC will alert the <br /> equipment operator and general contractor. SAIC will document the location and <br /> photo document the seeps. If free phase oil is pooling at the bottom of the trench, <br /> SAIC will coordinate with Sturgeon & Sons to vacuum off the oil. If the oil seep <br /> is minimal, the contractor may choose to line the trench excavation with plastic <br /> sheeting and continue pipe construction. <br /> These procedures are intended as a guideline to soil segregation during excavation <br /> activities. If there are any questions pertaining to the content of the guidelines please call <br /> Todd Del Frate at(916) 979-3741. <br /> Sincerely, <br /> SCIENCE APPLICATIONS INTERNATIONAL CORPORATION <br /> Todd A. Del Frate R.G. <br /> Project Manager <br /> K:\CVX-OVP\BOW SITES\Westside Channel\guidelinesltr.doc <br />