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technical specifications and oversight during backfilling activities. It is my understanding that the LEA is at a conference <br />0 0 <br />tec p g g 8 <br />all week. Regional Board staff has concerns over the excavation management activities observed over the past couple of <br />weeks and has not received adequate response to concerns over soil management activities, such as soil mixing and <br />prematurely backfilling of pits, that could negatively impact underlying groundwater. <br />A review of site trenching, excavation and backfill activities has also indicated the necessity for site coverage under the <br />Construction General Permit Order 2009-0009-DWQ . This Order requires Best Management Practices for areas of 1 -acre <br />or more disturbed property ( such as trenches and pits) for groundwater protection. Information regarding the <br />Construction General Permit can be found at the following link: <br />http://www.waterboards.ca.gov/water issues/programs/stormwater/construction.shtml <br />and how to sign up electronically at the following link: <br />https•//smarts.waterboards.ca.gov/smarts/faces/SwSmartsLogin.isp <br />or contact Robert Ditto at (916) 464-4841 from our Stormwater Program which handles the Construction General <br />Permit. <br />Thanks, <br />Ann AL Palmer <br />Water Resource Control Engineer <br />Site Cleanup Section <br />(916) 464-4825 <br />Ann. PaImer waterboards.ca.Rov <br />Central Valley Nater Board. <br />11020 Sun Center Drive, Suite 200 <br />Rancho Cordova, CA. 95670 <br />From: William Little (mailto:wlittle@advgeoenv.com] <br />Sent: Monday, October 26, 2015 3:29 PM <br />To: Palmer, Ann@Waterboards <br />Subject: 17100 Murphy Parkway - excavation backfill schedule <br />Ms. Ann Palmer: The power plant ownership inspected the property this week and meet with the <br />new owners of the former glass plant property. <br />The property owners have requested the excavation wall along the west property boundary be <br />backfilled or supported with soil. AGE plans to install a minor plastic barrier on the excavation wall <br />and place soil against the neighbor's property. AGE will start placing the plastic sheeting along the <br />waste remaining and then backfilling soil Tuesday (off Wednesday with rain) and be done by <br />Thursday/Friday. AGE plans to use the fine grain soil imported to start stabilizing the excavation. The <br />analytical analysis is attached. More fill will be imported for the final compaction filling. <br />