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w <br /> Page 1 of 4 <br /> Natalia Subbotnikova [EH] <br /> From: Michael Carroll[mcarroll@sjgov.org] <br /> Sent: Monday, July 16,2012 8:55 AM <br /> To: Robert McClellon[EH]; Natalia Subbotnikova[EH] <br /> Cc: Joyesh Chandra; Brian Closs <br /> Subject: RE: Corral Hollow Landfill-GW-6 <br /> Hi Robert, <br /> Sorry, I blanked out on the date of Natalia's most recent reading,taken this last Friday. <br /> It seems the methane content is variable,we will check again,and consider what to do about this. <br /> It would be ironic,would it not, if this shows up because of our improved probes? <br /> Mike <br /> W.Michael Carroll,PE <br /> Senior Civil Engineer,Public Works/Solid Waste <br /> 1810 E Hazelton Way <br /> Stockton,CA 95205 <br /> Phone(Direct):209-468-8504 <br /> Phone(Office Main):209-468-3066 <br /> Fax:209-468-3078 <br /> From: Robert McClellon [EH] [mailto:RMcClellon@sjcehd.com] <br /> Sent: Monday,July 16, 2012 8:20 AM <br /> To: Natalia Subbotnikova [EH]; Michael Carroll <br /> Cc:Joyesh Chandra <br /> Subject: RE: Corral Hollow Landfill -GW-6 <br /> Mike I think it is important to note that when the site exceeds the 5%by vol. @ the boundary the operator is to comply with <br /> T27CCR 20937 (below). <br /> Section 20937.CIWMB-Reporting and Control of Excessive Gas Concentrations. <br /> (a)When the results of landfill gas monitoring indicate concentrations of methane or trace gases in excess of the compliance <br /> requirements specified in Section 20921(a),the operator shall: <br /> (1)Immediately take all steps necessary to protect public health and safety and the environment and notify the EA by telephone <br /> or electronic means. <br /> (2)Within seven(7)days of detection of excessive landfill gas concentrations. <br /> (A)Verify validity of results by reviewing the following: <br /> (i)probe readings; <br /> (ii)possible liquid interference; <br /> (iii)control well influence;and <br /> (iv)barometric pressure effects. <br /> (B)Place in the operating record a description of and submit a letter to the EA that describes: <br /> (i)the levels of methane and trace gas detected; <br /> (ii)a brief description of the nature and extent of the problem based on information currently available; <br /> (iii)the steps the operator has taken to protect public health and safety and the environment;and <br /> 7/16/2012 <br />