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11 <br />Joyesh Chandra <br />San Joaquin County <br />Public Works Department <br />Solid Waste Division <br />1810 E. Hazelton Ave <br />Stockton, CA 95201 <br />August 2, 2010 <br />11 <br />Ausenco Vector <br />143E Spring Hill Drive <br />Grass Valley, CA 95945 <br />USA <br />T +1530 272 2448 <br />F +1 530 272 8533 <br />W www.ausenco.com <br />Re: Groundwater monitoring well and landfill gas monitoring probe installation at North County and <br />Harney Lane Landfills, San Joaquin County, California. <br />Dear Joyesh, <br />Enclosed are the boring logs and as -built well construction details for the groundwater monitoring wells <br />MW -5 and MW -6 at the Harney Lane Landfill, landfill gas monitoring probes SG -16A and SG -16B and <br />groundwater monitoring well G -la at the North County Landfill. These were installed between May 24 <br />and June 11, 2010 by Gregg Drilling of Martinez, California. Ausenco Vector personnel logged the soil <br />encountered during drilling and recorded the as -built well construction details per our proposal dated <br />November 18, 2009. The wells were installed in general accordance with the 'Work Plan - <br />Groundwater Monitoring Well Installation Project" prepared by San Joaquin County Public Works dated <br />November 23, 2009. <br />Please call Mr. Peter Holland at (530) 272-2448 if you have any questions or need additional <br />information. <br />Yours sincerely <br />Peter J Holland, CEG 2400 <br />Senior Geologist <br />