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No, the grout ratio is required for all grouts. It is listed in San Joaquin County Well Standard, 13.12.5. It is not just for <br /> pressure grout. All grout must meet that standard. <br /> Michael <br /> From: Rogers, Tamera [mailto:Tamera.Rogers@arcadis.com] <br /> Sent: Monday, April 17, 2017 3:46 PM <br /> To: Michael Kith [EH]; Granborg, Jennifer <br /> Subject: RE: Well Destruction Permits (Site and Right of Way) - 351515 4707 Pacific Avenue, Stockton - Additional items <br /> requested by County <br /> Hi Michael, <br /> I am the Arcadis Project Manager for this site and have been following the correspondence between you and Jennifer <br /> Granborg. It seems there are many questions that have come up and I feel that we have provided you with everything <br /> necessary to provide the permits. Half of the wells at this site are already destroyed. Over drilling of the sparge wells was <br /> proven to be an insufficient manner of destruction as the wells are too small diameter to use a stinger as a guide rod to <br /> reach total depth of the well and ensure the entire well is destroyed to installed depth. <br /> The vapor well that remains onsite has a H&S concern due to a subsurface utility in close proximity to the well. Arcadis <br /> and Chevron would like to avoid the potential outfall of a utility strike. The monitoring well at the bus stop is proposed <br /> for pressure grouting to save unduly inconveniencing bus drivers and community members by dragging out the well <br /> destruction process. If pressure grouting is not a preferred option at this location, blast perforation plans were provided <br /> by Stantec for a well destruction method and could be completed.This option would not be applicable at the vapor well <br /> as our access agreement with Target does not permit the use of explosive materials on their property. <br /> Also, in the attached correspondence between myself and Nuel Henderson from January of this year it clearly states that <br /> proposed method of well destruction of the sparge points and the grout ratio that was proposed. In his most recent <br /> response he clearly states "Ratio is good, we'll try it, see how the first one goes and proceed accordingly." If I am not <br /> mistaken, that is a clear indication that pressure grouting was conditionally approved pending the outcome of the <br /> process in the field. <br /> We have received orders from CVRWQC13 (Emily Cushman)to either sample or destroy the remaining wells during <br /> second quarter 2017. It seems unfair for SJCEHD to put us in the situation that we would have to sample wells, costing <br /> more money, because destruction permits cannot be issued. <br /> We understand the situation SJCEHD is in by having to issue permits and the potential risks that are taken when issuing <br /> permits and we greatly appreciate the time and effort that goes into making these decisions. <br /> Thank you. <br /> Cheers <br /> Tamera Rogers, GIT I AFS Project Manager I Tamera.Rogers@arcadis.com <br /> Arcadis I Arcadis U.S., Inc. <br /> 6296 San Ignacio Ave, Ste C & D San Jose CA 1 95119 1 USA <br /> T. +1 408 797 20131 M. +1 408 239 9616 <br /> Connect with us! www.arcadis.com I Linkedln I Twitter I Facebook <br /> 94ARCADIS <br /> EXPLOREArcadis ca �cT <br /> DOWNLOAO OUR MOBILE APP <br /> 6 <br />