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• <br /> inentified far -Future reference. <br /> B. With 16 to 24 hours offer completion, each yell will be <br /> developed by swabbing with a hard rubber disc or suitable device <br /> for at least 15 minutes , or as directed by Count-,i EHD peracrel . <br /> Fluids removed will be placed in properiv labeled drums a^d <br /> securely sealed for storage on 1 ac'ati c<- Di soon Sal of the con- <br /> tents <br /> on-tents will depend of the res.alis of laboratorf amalvsis. The <br /> County EHD office will be notified prior to commencement of <br /> operations. <br /> 9. As soon as practical after development, the static a,ater <br /> level in each well will be measured by a suitable electrical <br /> interface probe device, using the notched casing as a reference. <br /> A minimum of a casing volumes of water will be purged from each <br /> well using properly cleaned equipment. Removed fluids will be <br /> placed in suitable containers, properly identified, and stored on <br /> site for later disposal . Resistivity, temperature, and pH will <br /> be measured !, recorded during purging , which will continue until <br /> well bore conditions stabilize. <br /> 10. later samples will be obtained by use of a clear, �.ei l on <br /> • bailer or other suitable device, placed in clean glass Mals, alld <br /> preserved for shipment. They will be delivered to FGL laboratory <br /> under proper chain of custody with instructions to tesc for BTEX <br /> TFH-G, using methods and detection limits as specified by tl'e <br /> San Joaquin County EHD. That office will be notified pr'Or- to <br /> beginning operations so that County EHD personel can be pressat <br /> if necessary. <br /> The above work will be under the direction of a RegiszereJ <br /> Geologist from Wm. J. Hunter & Associates, and necessary field <br /> operations will be directly supervised as required. County EHD <br /> personel will be advised of commencement of each phase of the <br /> work, to allow field inspections as needed. Upon completion of <br /> the work, ani receipt and analysis of laboratory resur of sczl <br /> & water samples, a report will be prepared and submitted to the <br /> Countv EHD & CVRWQCB for review and comment. <br /> Work will be scheduled as soon as possible upon ,approval of this <br /> Addendum by the County. <br /> Mo. J. Hunter & Associates <br /> April 19, 1993 <br /> • cc: Canteen Corp. <br /> Osterberg & Stewart <br />