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Wong,Jeff <br /> From: Hugh McManus <hmcmanus@dudek.com> <br /> Sent: Friday, July 26, 2019 10:55 AM <br /> To: Wong,Jeff <br /> Cc: Ahmed, Naseem; Glenna McMahon <br /> Subject: Re: PAYMENT - Former Kearney KPF Facility - Monitoring Wells (KS-10 and KI-20) <br /> Hi Jeff, <br /> Thanks for the email. <br /> The work conducted for the construction of monitoring wells KS-10 and KI-20 will deviate from the originally submitted <br /> Work Plan to conform with San Jaquan County Well Standards. Deviation to the Work Plan will include the use of <br /> Cement-Bentonite grout that will not contain more than 3-5% Bentonite rather than the High Solids Bentonite that was <br /> stated in the original Work Plan . All Bentonite will be NSF approved or equivalent type designed by the manufacturer <br /> for the intended usage. <br /> Please consider this email as Dudek's amendment to the Work Plan for KS-10 and KI-20. <br /> Thanks again, <br /> Hugh McManus <br /> HUGH MCMANUS <br /> GEOLOGIST <br /> DUDEK <br /> ENGINEERING+ENVIRONMENTAL <br /> 605 THIRD STREET <br /> ENCINITAS,CALIFORNIA 92024 <br /> T 760.479.4149 C 858.382.0419 <br /> WWW.DUDEK.COM <br /> On Jul 26, 2019, at 9:28 AM, Wong,Jeff<Jwong@sigov.org>wrote: <br /> Hugh: <br /> Per SJC Well Standards, sealing the upper annular space of a monitoring well has the following <br /> requirements: <br /> Section 13.12.3. "Sealing material shall be selected based on required structural, handling, and sealing <br /> properties and the chemical environment into which it is placed. Sealing material shall consist of neat <br /> cement, Bentonite neat cement grout, or Bentonite clay." <br /> Section 13.12.6 "Cement-Bentonite grout shall contain not more than 3-5% Bentonite." <br /> Section 13.12.9 "All Bentonite used must be NSF approved or equivalent type designed by the <br /> manufacturer for the intended usage." <br />