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• Preliminary site assessments , in accordance with the <br /> requirements of the County Environmental Health <br /> Department , must be undertaken by a qualified <br /> professional in areas of known or suspected fuel <br /> releases , prior to development . <br /> • Any contamination identified by the preliminary <br /> assessments must be investigated and remediated, if <br /> required, prior to construction to reduce potential <br /> exposure of construction workers and the public to <br /> hazardous materials and to prevent further <br /> environmental degradation. Remediation of soils <br /> could include excavation and on- or off-site <br /> treatment or disposal or in-place treatment of the <br /> affected soils . <br /> • If the groundwater had been affected by fuel <br /> releases , remediation would be required to the extent <br /> necessary. Such remediation could include : <br /> groundwater extraction and treatment ; disposal of the <br /> treated water to surface waters ; or reinjection into <br /> the groundwater . Extraction of groundwater without <br /> reinjection could affect the water resource supplies <br /> in the area . <br /> • The location of all existing and abandoned fuel lines <br /> must be established in the Specific Plan so that any <br /> required setbacks can be incorporated. Prior to <br /> construction near the existing and abandoned buried <br /> fuel lines , the location of the lines must be further <br /> established (e .g . , accurate maps from the owner <br /> and/or operator or geophysical surveys . <br /> • All construction near the existing or abandoned fuel <br /> lines must be undertaken following a site-specific <br /> health and safety plan to protect the welfare of the <br /> workers . If contamination is identified, <br /> investigation and remediation must be undertaken in <br /> accordance with the requirements of the County and <br /> the RWQCB. <br /> • Construction at the locations of above-ground fuel <br /> storage tanks must occur in accordance with <br /> site-specific health and safety plans unless it has <br /> been previously determined that releases have not <br /> occurred from the operation of the tanks . Such <br /> determination could be made by inspection of the <br /> tanks and/or soil sampling under or near the tanks . <br /> C2-52 <br /> 0189r/0202r <br />