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Page 2 of 2 (i) probe readings; (ii) possible liquid interference; (iii)control well influence; and (iv) barometric pressure effects. (B) Place in the operating record a description of and submit a letter to the EA that describes: (i)the levels of methane and trace gas detected; (ii) a brief description of the nature and extent of the problem based on information currently available; (iii)the steps the operator has taken to protect public health and safety and the environment; and (iv)a brief description of any further corrective actions that the operator or others need to take to adequately protect public health and safety and the environment prior to the implementation of the remediation plan described in subdivision (a)(3) below. (3)Within 60 days of detection, implement a remediation plan approved by the EA and CIWMB for the methane gas releases, place a copy of the plan in the operating record,forward a copy of the plan to the EA and CIWMB, and notify the EA that the plan has been implemented. The plan shall describe the nature and extent of the problem and the proposed remedy. (4)Construct a gas control system that meets the criteria of Section 20939, designed by a registered civil or mechanical engineer,within a period of time specified by the EA. Installation of the system shall be in accordance with a design and in a manner approved for construction by the EA in coordination, if applicable,with the RWQCB. (b)The EA,with concurrence by the CIWMB, may establish an alternative schedule for demonstrating compliance with subdivisions(a)(2) and (3) pursuant to 40 CFR 258.23(c)(4). (c)The EA shall forward notifications and approvals made pursuant to 17(a)(1), (2)and (3)to the CIWMB. Thank you. Natalia Subbotnikova, Senior REHS San Joaquin County Environmental Health Department 1868 E Hazelton Ave Stockton, CA 95205 (209)468-0338 7/13/2012