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Page 14 of 16 <br /> Hope this helps streamline the abandonment process and leads to <br /> a clear idea of what is expected in the field. <br /> Thanks, <br /> Stephanie McKenna <br /> Project Manager - Marketing Business Unit <br /> -----Original Message----- <br /> From: Mike Infurna [EH] rmailto:MInfurna s 'cehd.com] <br /> Sent: Wednesday, August 17, 2011 9:44 AM <br /> To: Jim Barton; McKenna, Stephanie <br /> Cc: Brenda Evans <br /> Subject: RE: 5400 Pacific Avenue Stockton <br /> Thank you Jim. <br /> Ladies and Gentleman, <br /> For your information, I have been in contact with Josh Ewert of <br /> GeoCon regarding which wells will be pressure grouted and which <br /> will have the contents removed. <br /> Including the requirement for monitoring wells #2, 3, & 11 as <br /> listed in the CVRWQCB August 17 letter, I have asked Josh to <br /> provide me a list of ALL of the wells for this site and a <br /> notation next to each as to the method of destruction he would <br /> like to use. I will review this proposal to see if the wells <br /> Josh has proposed for pressure grouting qualify. If they don't, <br /> they will be required to have the contents removed. To qualify <br /> for pressure grouting, the soil, gw, and vapor data indicating <br /> there is no residual contamination present must be available. <br /> Wells with NO data available will be considered UNKNOWN and not <br /> qualified for pressure grout. <br /> Typically, wells of unknown construction, obstructed, <br /> contaminated or in an area of known contamination*, or <br /> incapable of being properly pressure grouted must have the <br /> contents removed. The EHD is mandated by County Ordinance to <br /> require wells to have the contents removed (commonly noted by <br /> consultants and drillers as 'over-bored') if they do not meet <br /> the requirements for pressure grouting. <br /> *The EHD interprets 'area of contamination' as the current <br /> contamination, or lack of, in the well's most current lab data <br /> for all/any matrix. Laboratory concentrations for any <br /> constituent of concern that is significantly above acceptable <br /> detection limits indicates the well is contaminated and cannot <br /> qualify for pressure grout destruction. <br /> The EHD accepts wire line destruction (down-hole explosion) and <br /> over-boring of wells as 'removing the contents' . Wells much <br /> be drilled out with at least the same size auger as installed, <br /> 12/20/2011 <br />