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Adrienne Ellsaesser [EH] <br /> From: Adrienne Ellsaesser [EH] <br /> Sent: Friday, January 23, 2015 9:18 AM <br /> To: 'Baertschi, Dennis' <br /> Cc: Project Email Filing;John Yoakum [EH] <br /> Subject: RE: 240943- 1267 Country Club Blvd, Stockton-Well Destructions —COR-240943— <br /> Hi <br /> COR-240943Hi Dennis, <br /> Grouting the wells does not meet our standards when they are found with contamination. Can you provide us with an <br /> alternative destruction method that meets your safety issues while meeting our destruction requirements that all well <br /> contents are removed? <br /> An alternative that we will accept is the use of explosives that destroys the casing to allow grout into the annual space <br /> and fully seals off the entire filter pack and the clay lens above it. PG&E has allowed the use of explosives to destroy a <br /> monitoring well within 5 feet of their gas line, when the first charge is placed 20 feet below the surface and the grout is <br /> placed in the well before detonation. <br /> Water Well Tech Inc. was granted this approval by PG&E, if you need an explosive contract who knows how to use <br /> explosives within the city, within utility lines, and at gas stations. If he is not able to explode this well, if you choose to <br /> uses this method, let me know. <br /> Thanks <br /> Adrienne <br /> From: Baertschi, Dennis [mailto:dbaertschi(dcraworld com] <br /> Sent: Thursday, January 22, 2015 2:58 PM <br /> To: Adrienne Ellsaesser [EH] <br /> Cc: Project Email Filing; Baertschi, Dennis <br /> Subject: 240943- 1267 Country Club Blvd, Stockton-Well Destructions —COR-240943— <br /> Importance: High <br /> Hi Adrienne, <br /> We are at the above site this week completing well destructions. We are doing airknife clearing (to 5 feet deep) today <br /> and have a situation where we have concerns about the proximity of an electrical line near wells S-4 and S-11 <br /> (attached Site Map shows the location of these wells—near corner of Country Club & Pershing; and the attached photo <br /> shows the marked electrical line (in pink) and its proximity to wells S-4 and 5-11, with 5-11 being at bottom of the <br /> picture). <br /> The line was identified by our private utility locate service sub, and is a traffic control electrical line that goes from an <br /> electrical box in the sidewalk (out of the picture and locate just before you approach 5-11) and runs to another electrical <br /> box that feeds the traffic signal pictured at the corner of Country Club & Pershing (you can just see the traffic light's <br /> metal post). The location of this line was re-confirmed today by the City of Stockton and also confirmed today by <br /> Potholing and physical locating it. This line is about 1 foot away from our well 5-11 and about 3 feet from our well S- <br /> 4. These two wells were proposed to be over drilled because during the last groundwater sample event there was very <br /> low level diesel hits in both wells. We have obvious great safety concerns with overdrilling these two wells because of 1) <br /> the very close proximity of the line to our wells, and 2) because it is an electrical line which can cause serious injury in a <br /> case of a accidental incident. Over-drilling well 5-11 presents the highest risk because the electrical line is so close. <br /> 1 <br />