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SENT BY EMCON 6-16-98 ; 1:53PM ; EMCON SACRAMENTO- :# 2/ 6 <br /> • <br /> METING AGENDA <br /> Well Abaad nment of Tesoro Well 17A 1 <br /> Date: Thursday,September 18, 1998 <br /> 1:30 p.m. <br /> Location: San Jaoquin County Public Health Services OlTtce <br /> Current Status <br /> • February 6th well abandonment activity removed casing and grouted between ground surface <br /> and 55 ft-bgs I <br /> • S7CPHS stated concerns regarch g methods used with respect to Section 13.17.6 of Well <br /> Standards <br /> Background <br /> • DWR Records indicated well w 10 inch diameter and completed at 200 ft-bgs <br /> • Well no longer in service i <br /> • Original workplan called for perorating well casing at 5 ft intervals and pressure grouting <br /> • Summer 1997 depth tagged at 9 ft-bgs <br /> • Video Log encountered obstructibn at 55 ft and showed corroded casing at 55 ft bgs <br /> • Workplan submitted proposingp�rfomtion and pressure grouting 55 ft-bgs to ground surface <br /> • BIC Aquitard unit-well grouted(across this interval <br /> Discussion of Field Activities <br /> • Neat cement grout iremied fromi5 ft-bgs to ground surface <br /> • 9 yd3 of grout placed <br /> -4 yd3 placed followed by yd3 <br /> • Pulled casing-44 R removed <br /> Potential Concerns <br /> • SJCPHS does not consider grout lacement occurred as continuos process <br /> • well casing removal prior to tre ie pipe removal <br /> • Petroleum hydrocarbon impacted soil on well cuing between 30 and 40 11 bgs <br /> • Section 13.17.6 of Well Standard -was abandonment consistent with requirements? <br /> • Conduit for future groundwater it apacts? <br /> Future Actions <br /> • Approval of abandonment verite%reabandonment <br /> I <br /> i <br /> i <br /> f <br /> I <br /> 1 <br /> i <br />