Laserfiche WebLink
Mr.M. Scott Mansholt—CA • <br /> Request to Properly Destroy Monitoring Wells May 26,2009 <br /> Former Lyoth Loading Station,Lyoth,CA Page 2 of 2 <br /> the depth of the proposed well destruction and the auger diameter. Actual well depths <br /> will be confirmed in the field. <br /> SAIC will coordinate the proper destruction of wells MW-1, MW-2, MW-3, MW-4, <br /> MW-6, and MW-7 by: <br /> • Obtaining the appropriate well destruction permits from the San Joaquin County <br /> Environmental Health Department(SJCEHD). <br /> • Notifying Underground Service Alert at least 48 hours in advance of field activities. <br /> • Contracting an underground utility locator to clear subsurface utilities in the area of <br /> the wells to be destroyed. <br /> In accordance with SJCEHD guidelines, the well casing and filter pack will be over <br /> drilled to the total depth of the well, using a truck-mounted drill rig equipped with <br /> 8.25 inch-diameter hollow-stem augers as indicated in Table 1. Well destruction <br /> activities will be managed by an on-site SAIC field geologist under the supervision of an <br /> SAIC California Professional Geologist. The well boring will be backfilled with neat <br /> cement to surface grade using a tremie pipe. The existing bollards will be removed, and <br /> any depression left by removal of the bollards will be backfilled to surface grade with <br /> neat cement. Well construction details were only available for MW-7 and are provided <br /> as Attachment B. SAIC will notify SJCEHD and the RWQCB of the proposed well <br /> destruction a minimum of 48 hours in advance. <br /> On completion of the well destruction, SAIC will prepare a report documenting the <br /> destruction activity and submit the report to the SJCEHD and the RWQCB. SAIC will <br /> submit a well drillers report (Form DWR 188) to the California Department of Water <br /> Resources as required. <br /> If you have any questions regarding this request, please call Michael Hurd at (510) 466- <br /> 7161. <br /> Sincerely, <br /> SCIENCE APPLICATIONS INTERNATIONAL CORPORATION <br /> Michael Hurd, CHG 0068 <br /> Senior Environmental Project Manager <br /> Enclosures: s' <br /> Figure 1. Site Vicinity Map <br /> Figure 2. Site Map <br /> Table 1. Well Destruction Details <br /> Attachment A.RWQCB Correspondence <br /> Attachment B.MW-7 Well Construction Details and Boring Log <br />