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i <br /> Gabriel Gonzalez [EH] <br /> From: Silva, Larry <Isilva@craworld.com> <br /> Sent: Sunday,June 29, 2014 6:59 PM <br /> To: Gabriel Gonzalez [EH] <br /> Subject: RE:620 West Charter Way, Stockton <br /> Hi Gabriel, <br /> Well MW=5 will be destroyed by pressure grout methods as outlined in your email below. <br /> Thank you, <br /> Larry <br /> From: Gabriel Gonzalez [EH] [mailto:gagonzalez@sjcehd.com] <br /> Sent: Wednesday, June 25, 2014 3:30 PM <br /> To: Silva, Larry <br /> Cc: Adrienne Ellsaesser[EH] <br /> Subject: RE: 620 West Charter Way, Stockton <br /> Hello Larry, <br /> I spoke with Adrienne regarding your variance request to pressure grout MW-5.You maypressure grout MW-5 under <br /> the following conditions: <br /> During the pressure grouting,twenty-five pounds per square inch of liquid pressure must be applied for at least ten <br /> minutes. San Joaquin County Well Standards do require that, "If the well casing was left in place during the sealing <br /> operations, a hole at least one foot larger in diameter than the originally drilled hole shall be excavated around the <br /> outside of the well casing to a depth of 3 feet below the ground surface, and the well casing'shall then be cut off 6 <br /> inches above the bottom of this excavation and removed. The grout used to fill the well shal[be allowed to spill over the <br /> excavation during the sealing operation,and fill.it for a thickness of one foot and form a "cap"which has a diameter of <br /> at least one foot greater than the diameter of the originally drilled hole." <br /> This implies that excavation is to be done around the underground pipe adjacent to MW-5 in order to satisfy the <br /> requirements above. <br /> Sincerely, <br /> Gabriel Gonzalez <br /> From:,Silva, Larry [mailto:lsilvaCa)craworld.com] <br /> Sent: Wednesday, June 25, 2014 11:43 AM <br /> To: Gabriel Gonzalez [EH] <br /> Cc: Adrienne Ellsaesser [EH] <br /> Subject: RE: 620 West Charter Way,.Stockton <br /> Hi Gabriel, <br /> I'm getting back to you regarding the underground pipe that was discovered during clearing activities at MW-5. <br /> Based on the pipe's close proximity to MW-5,the pipe had to be installed after MW-5 was constructed. Similar pipes <br /> were observed in old photos(Feb- 1990)taken of station construction activities. it's likely that the pipe was installed <br /> 1 <br />