Laserfiche WebLink
<br /> <br />Soil Investigations for Data Collection in the Delta <br />Initial Study/Proposed Mitigated Negative Declaration 164 <br />there would be no impact regarding violation of water quality standards or waste <br />discharge requirements or degrading surface or groundwater quality, implementation <br />of Mitigation Measures MM HYD-1, MM BIO-2, MM AES-1, and MM AGR-1 would <br />further avoid, minimize and/or reduce the potential for impacts. <br />MM HYD-1: <br /> <br />a. All fueling and maintenance of vehicles or other equipment for on-land soil <br />investigation activities shall occur on established roads, or in designated <br />staging areas at least 50 feet away from any on-site water feature. Secondary <br />containment for fuel and gas tanks will be used to prevent spills from entering <br />any water features. <br />b. Absorbent materials will be available on-site. Any accidental leaks or spills will <br />be immediately cleaned up per the procedures identified in the contractors <br />Spill Prevention and Response Plan, and the equipment will not be able to <br />return to the project area until it has been repaired sufficiently to prevent <br />further leaks or spills. <br />c. For overwater soil investigations positive barriers consisting of hay waddles <br />and/or other suitable type of spill-stoppage materials will be placed around <br />the work area on the barge and ship decks. <br />d. Discarded soil samples, cuttings, and excess drilling fluids will be kept in a <br />closed system, to prevent spillage of the drilling fluid and will be disposed of <br />off-site at an appropriate landfill. <br />e. All over-water work will include the use of conductor casings to confine the <br />drill fluid and cuttings to the drill hole and the operating deck of the barge or <br />drill ship and prevent any inadvertent spillage into the water. Soil samples will <br />be collected from within the conductor casing. The casing will remain in place <br />until the bore hole is complete and has been filled in, to minimize sediment <br />disturbance of the slough or river bottom. <br />f. During overwater soil investigations a qualified environmental monitor will <br />watch for colored plumes (an indication that drilling fluid or other material is <br />entering the water and may affect water quality). If found, activities will cease <br />until appropriate corrective measures have been completed or it has been <br />determined that the environment will not be harmed. <br />b) Substantially decrease groundwater supplies or interfere substantially with <br />groundwater recharge such the project may impede sustainable groundwater <br />management of the basin? <br />No impact. The Proposed Project would not decrease groundwater supplies or <br />interfere substantially with groundwater recharge because no water would be