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marginally impacted by hydrocarbons than for samples collected from monitoring wells which yield <br /> • hydrocarbon-impacted water <br />' 7 After purging,the temperature,pH and electrical conductivity will be checked every 10 minutes until they <br /> stabilize Stability will be achieved when two consecutive measurements of 5 units of pH are within two <br /> degrees Fahrenheit for temperature and within 5 percent of electrical conductivity measurement <br /> I8 The purged water will be dumped or pumped into barrels onsite for holding prior to determining proper <br /> disposal <br /> I9 The water samples will be poured from a disposable bailer or pumped directly into sample battles For <br /> bottles without preservation,the cap and bottle will be rinsed two or three times with well water and 8114 <br /> keeping the head space to zero For bottles with a preservation,no rinsing will be made and the sample <br /> bottle will be filled directly with minimum head space <br /> 10 Each sample container submitted for analysis will have a label affixed to identify the job site, sample date <br />' and time,and a unique sample identification number <br /> 11 The samples will be placed in a cooler with dry ice or blue ice for transportation to the analytical <br /> laboratory <br /> 12 The samples will be delivered to the laboratory as soon as possible 1f the samples are kept overnight, <br /> they will be refrigerated at 39 degrees Fahrenheit and delivered to the laboratory within 72 hours of <br /> sampling time <br /> 13 The chain-of-custody document will accompany the samples at all times The chain of custody document <br /> • is to document possession of the sample from time of collection to its arrival at the analytical laboratory <br /> When samples are shipped,the responsible technician or geologist relinquishes custody of the samples by <br /> signing the chain of custody form,noting the date and time The delivering responsible technician or <br /> geologist will insure that the receiving sample control chemist at the analytical laboratory will conduct the <br /> following inspection <br /> verifies sample integrity, <br /> • confirms storage in the property container, <br /> • recognizes that an adequate volume of fluid has been collected for the required analyses, <br /> • identifies the method of preservation, <br /> • correctly identified what analyses are to be conducted,and <br /> • accepts custody for the laboratory when then conditions have been satisfied <br /> 14 The wellhead will be secured prior to departure <br /> I 7 <br /> I <br /> Main1D\Environmental\Par=rTexaco%Rcpons1093004QMR wN 8 <br />