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i <br /> .:a <br /> F Beacon/Ultramar:#3641 February 6, 2012 <br /> 1;,1210 E. Hammer Lane, Stockton, CA 95214 page 2 <br /> ,;In photographic evidence dated June 21; 1996, the EHD was able to verify-that six conductor <br /> ;casings were placed in-between the USTs and were not grouted on the outside as shown in the <br /> Horizon well logs. Only pea gravel is present outside of the conductor casings; a condition that <br /> the EHD has determined doesnot provide a permanent or adequate seal to prevent vertical <br /> .`.migration of contaminants left in place or released at the surface and as such, does not normally <br /> ".meet the standard requirements of the EHD Well Standards. <br /> The EHD nnot—determine if the Horizon well ogs 1 rtriple=.nested II, W-11VVI1-112 and <br />} double-ne ted VW-314 �e accurate either, therefore MW-1/VW=112 and are~to_esir <br /> out with an au r-of�equate size (15 to 18-inch) to remgve_ad-the-c�ont:ugnts of the well to total <br /> depth of original construction unless you can demonstrate that the excavation pea-gravel backfill <br /> intersects the well borehole somewhere along its length, in which case pressure grouting will be <br /> ermitted. <br /> If you have any questions you may contact. Mr. Nuel Henderson at (209) 468-3436 or Ms. <br /> 1'Adrienne Ellsaesser at (209) 468-0343. <br /> Nuel Henderson, PG Adrienne Ellsaesser, REHS <br /> -Engineering Geologist Acting Program Coordinator <br /> c: Mr. James L. Barton., Central Valley Regional Water Quality Control Board, Underground <br /> Storage Tank Unit, 11020 Sun Center Drive, #200, Rancho Cordova, CA 95670-6114 <br /> Mr. Kirk Larson, State Water Resources Control Board, Division of Cleanup Water <br /> Programs, Underground Storage Tank Program, PO Box 944.212, Sacramento, CA <br /> 94244-2120 <br /> Mr: Rexford Smith, Horizon,Environment Consulting; 4970 Windplay Drive,-#C5, <br /> El Dorado Hills, CA 95762 <br /> t <br />