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ENVIRONMENTAL HEALTH DEPARTMENT SAN JOAQUIN COUNTY Unit Supervisors Donna K.Heran,R.E.H.S. 304 East Weber Avenue.Third Floor Carl Borgman,R.E.H.S. N: Director Mike Huggins,R.E.H.S.,R.D.I. Al Olsen,R.E.H.S. Stockton, California 95202-2708 Douslas W.Wilson,R.E.H.S. 3-130 Margaret Telephone: (209)43420 Marzaret Lorio.R.E.H.S.68- - 0 i-Soi 6-i Laurie A.Cotulla,R.E.H.S. Fax: (209)464-0138 Robert McClellon,R.E.H.S. Program X[anager Mark-Barcellos,R.E.H.S. May 7,2004 Sent Certified and U.S.Mail Judy McCambell Tandy Corporation y 100 Throckmorton St.,Suite 811 FILE NFRO Fortworth,TX 76102 RE: Monitoring and reporting requirements for gas monitoring probes at Turnpike Rd.South of Downing Rd.,Stockton,CA.(APNs: 17517018, 17517019,17519001.) In accordance with Titfe 27 California Code of Regulations (27 CCR). Section 20933(a). and Section 20934(a), the San Jo4quin county Environmental Health Department (EHD) is requiring quarterly monitoring and reportitig for the gas monitoring probes constructed at Turnpike Rd.,south of Downing Rd. The following sections explain requirements that must be met. 27 CCR, Section 20933;Monitoring Frequenc% (a)At a minimum,quarterly monitoring is required.The EA may require more frequent monitoring based upon site specific factors in section 20923(a)(2). %Vhen more frequent monitoring is necessary,the requiring agency shall notif,-the operator. 27 CCR,Section 20934; Reporting e EA within ninety(90)days of sampling. (a)The results of gas monitoring shall be submitted to th provided that compliance levels are maintained.When compliance levels are exceeded at any probe,the requirements of section 20937 shall apply.The monitoring reports shall include:(1) the concentrations of the methane.as measured at each probe and within each on-site structure; (2) the concentrations of specified trace gases,if required; (3) the documentation of date, time, barometric pressure, atmospheric temperatures, general weather conditions,and probe pressures; (4) the names of sampling personnel, apparatus utilized, and a brief description of the methods used;and (5) a numbering system to correlate monitoring results to a corresponding probe location. The EHD Is requiring quarterly sampling of the gas probes to be mformed within thirty(30)days of receipt of this letter. TAa results of the gas monitoring are t,-.&submitted to the EHD within ninety (90)days of sampling provid[M that compliance levels are maintained. If you have any questions regarding this letter,please contact Ted Tasitopoulos REAS.at(209)953-7699. Sincerely, Robert McClellon,Supervisor R.E.H.S. Environmental Health Department CC:John Macanas,CIWMB,MS-20