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Mr. Jeffrey Wong <br /> June 21,2012 <br /> Page 2 <br /> with rinsate also placed into the drum. Precautions will be taken during disconnection of <br /> the piping joints to prevent diesel fuel from being released into the basement or on the <br /> rooftop,with absorbent material and buckets used to capture any residual diesel fuel. <br /> Used absorbent material will be placed into a 55-gallon drum, with all drums properly <br /> labeled and stored on a secondary containment pad in a secure location within the <br /> basement of the AT&T facility pending off-site disposal. <br /> Following rinsing,the accessible supply and return piping within the basement and on the <br /> rooftop will be removed and temporarily stockpiled in the basement of the AT&T <br /> building. Approximately 85 feet of previously-abandoned piping within the basement <br /> will also be removed and stockpiled on-site,with removed piping placed on and covered <br /> with plastic. <br /> In order to confirm the piping scheduled for abandonment within the piping chase has <br /> been properly rinsed, the piping will be allowed to drain for approximately one hour into <br /> a 55-gallon drum. Fluids from the pipes will be then inspected to confirm no free product <br /> is present and the lower explosion limit(LEL) measured at each end of the supply and <br /> return pipes. Upon confirmation that no free product is present and the LEL is below <br /> 10%, the ends of the piping will be capped and labeled as abandoned in place. <br /> During the course of the project, Shaw will arrange for the stockpiled piping to be <br /> removed as needed,with the piping transported by Ecology Control Industries under a <br /> uniform hazardous waste manifest to their facility in Richmond, California for disposal. <br /> The drummed absorbent material and diesel fuel/rinsate will also be transported under a <br /> uniform hazardous waste manifest by PSC, Inc. to their disposal facility in Rancho <br /> Cordova, California. <br /> Reporting <br /> Following completion of field activities, a report will be prepared by Shaw documenting <br /> pipeline removal activities, with copies of permits,manifests and site photographs <br /> included in the report. Upon approval from AT&T, a copy of the report will be <br /> forwarded to the San Joaquin County Environmental Health Department for their records. <br /> If you have any questions regarding the information presented in this work plan,please <br /> contact Rob Delnagro at(925)288-2103. <br /> Sincerely, <br /> Shaw Environmental,Inc. <br /> 1 <br /> Rob Delnagro <br /> Project Manager <br /> cc: Mr. Michael Schenone—AT&T Services, Inc. <br />