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Pagel of 3 <br /> Natalia Subbotnikova [EH] <br /> From: Joyesh Chandra [Jchandra@sjgov.org] <br /> Sent: Monday, January 30, 2012 8:32 AM <br /> To: Natalia Subbotnikova[EH] <br /> Cc: Michael Carroll <br /> Subject: Edits to Corral Hollow EMP Workplan-Rvesion No 2 <br /> Hello Natalia <br /> Below is the clarification from our consultant regarding the bentonite hydrating time for Corral <br /> Hollow's EMP Work plan, revision No 2. This is the same clarification as submitted for the <br /> revision 1. We apologize for not updating the hydrating time in revision No 2. <br /> Based the text, Section 3.4.2, first full paragraph on page 10 states that " After the seal has <br /> been hydrated, it will be allowed to cure for at least 30 minutes prior further well sampling or <br /> construction activities." However, Section 3.4.4, second paragraph states: "After the bentonite <br /> chip seal is constructed, the bentonite will be allowed to hydrate for at least one hour before <br /> additional well development." <br /> For consistency and employing prudent practices of installing an effective bentonite seal, the <br /> text in Section 3.4.2 should be modified to state: " After the seal has been hydrated, it will <br /> e allowed to cure for at least one hour prior further well sampling r construction <br /> activities." <br /> After your approval of the work plan, please fax or e-mail me the approved service request. <br /> Please let me know if you need any additional information. <br /> Thanks <br /> JOYESH CHANDRA <br /> SAN JOAQUIN COUNTY <br /> PUBLIC WORKS DEPARTMENT <br /> SOLID WASTE DIVISION <br /> PH: (209) 468-3066 <br /> Fax: (209) 468-3078 <br /> From: John Hower [mailto:jmhower@geo-logic.com] <br /> Sent: Friday, January 27, 2012 3:16 PM <br /> To: Joyesh Chandra <br /> Cc: Michael Carroll <br /> Subject: RE: Edits to Corral Hollow EMP Workplan-RI <br /> Hi Joyesh, <br /> Please forward Sarah's response. I apologize for not getting that corrected in the first place. <br /> John M. Hower,CEG <br /> Supervising Geologist <br /> 1/30/2012 <br />