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July 16, 2012 <br /> Bob & Sherry Burns <br /> 5700 W. Durham Ferry Rd. <br /> Tracy, CA 95304 <br /> Project: Septic Leach Field Pier Supports for Ground Mounted PV System at <br /> 5700 W. Durham Ferry Road, Tracy, CA <br /> Upon review of the Site Plan (sht. 2 of 4) dated 7/10/12 and Professional <br /> Solar Products specifications and installation guide, it is determined that the <br /> pier holes supporting the solar panels shall be no deeper than 30" below <br /> finish grade and located a horizontal distance of 28" minimum between the <br /> standard septic system leach lines and the edge of the pier hole concrete (or <br /> 36" min. from center line of the leach line to centerline of the 12" diameter <br /> pier hole). <br /> Sincerely, <br /> Scott A. Veldkamp, P.E. <br /> RCE 39990 <br /> !paF SIOy'�! <br /> %® VE <br /> e•:xP. .q <br /> i <br /> Vii <br /> ®F �1� <br />