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.rim.Gunter & Associates 2220 Loma Vista Dr. <br /> Register. eologists Sacramento,CA 95825 <br /> Petroleum&Mineral Appraisers (916)972-7941 <br /> FAX (916)972-1683 <br /> WORKPLAN FOR MONITORING WELL <br /> DESTRUCTION <br /> 1145 W. Charter Way <br /> Stockton, CA <br /> April 30, 1999 <br /> PURPOSE OF WORK: <br /> As a result of extensive site investigative work, it has been established that the <br /> soil and groundwater contamination encountered beneath 1145 W. Charter Way <br /> has been caused by leaking gasoline UST's at offsite locations to the east and <br /> west The responsibility for cleanup of the contamination has been assigned to <br /> the owners of those UST's, and five(5)of the eight(8)monitoring wells on the <br /> property will be transferred to those responsible parties. As instructed by the <br /> Regional Board staff, the three remaining wells,#4,#6, and#7,are to be <br /> destroyed. Refer to CRWQCB correspondence dated April 16, 1999 for details. <br /> WORKPLAN: <br /> 1. Mobilize properly licensed V&W Drilling Co. C-57 auger rig equipped with <br /> sufficient clean 10" OD augers to complete each well destruction without having to <br /> decontaminate equipment. <br /> 2. Each well will be destroyed in the manner detailed below: <br /> a) Surface box and grout will be removed. <br /> b) The 2" PVC casing and grouting material will be drilled out using 10" <br /> OD hollow stem augers. Each hole will extend 2-3'below casing <br /> bottom. <br /> c) Casing, grouting material and drill cuttings will be placed on plastic in <br /> an unused location on the property and thoroughly sealed with plastic. <br /> d) The hole will be filled with a cement/bentonite mixture pumped in place <br /> using a Flexible hose or tremie pipe. <br /> e) The top 2 feet of each hole will be filled with readymix concrete. <br /> 0 Each hole will be finished flush with ground level. <br /> 3. The County EHD will be notified a minimum of 48 hours prior to commencing <br /> operati� <br /> .�7//,Hunte FFEo^c <br /> N'�V d ''J C`J Vll <br /> EFTS M'*)NIJE ENTAL liEALTif �i °€i'443N )w1116" <br /> 304 E. Weber Ave.Third Floor rro.esc <br /> P.O. Rix 388, SY)ckton,CA 95201-0388 *STA�oF CPI\FC����41 <br /> Phone: (209)468-3420 <br /> Droved <br /> d((� roved with changes: See Remarks <br /> Q oisapproved: See Remaft <br /> Remarks <br /> Date � — ey <br /> Approval of these plans Axte d5 only to that <br /> which is shown and described hereon but <br /> do>as not authorize or approve any omission <br /> or deviation of requirements of State laws or <br /> Local Ordinances. <br />