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STANDARD OPIERA TION <br /> �RaUND WATER SAMINCRES <br /> A <br /> Gcttler-Ryan, Inc personnel adhere to the following <br /> o ground water sample$ procedures for the e <br /> collection, the t prier to alYszs by the procedures laboratory and handling <br /> com o type of analysis to be borator <br /> P ands zs controlled and sample Performed is determined r Pr24z to sample <br /> P preservation for subsequentLass prevention of volae le <br /> Prior to s analysis is maintained <br /> interface sampling, <br /> the presence <br /> probe Product thickness,fz absence <br /> Of free-phase h <br /> the field .notes Present, ydrocarbons is determined using an <br /> In addition, static water level measured to the nearest 4 Ol foot <br /> probe and are also recorded zn the field notes and is noted in <br /> measurement$ are collected With the interface <br /> After water levels are collected and prior to sampling, <br /> each well is purged a minimum of three <br /> Temperature, l5 Pre-cleaned pumps (Stack, suctzOn, Grundfas} <br /> times during the pur in PH, and electrical conductivzt <br /> g g Purging continues until these y are measured a � or polyvinyl <br /> Parameters stabilize minimum of three <br /> Ground water samples are collected using disposable <br /> from the bailer into appropnate containers P le bailers <br /> laboratories, are sued when The wafer samples are transferred <br /> laboratory is Instructed toPossible <br /> pre-preserN'ed containers <br /> passible When pre-preserved c suPPlied b <br /> for the laboratory to use in Preserve the sam azltazners Y analytical <br /> Pie as appropriate <br /> ppro date are not available, the <br /> e labeled to include the maintainin P Duplicate samples are collected <br /> g quality assurance/qualrt control <br /> preservation (if an Job number, sample identificatioiz, collection da�yards <br /> cooler y}, and the sample collector s initials The samples <br /> maintained at 40O for transport to the laboratory The nd tiirie analysis, <br /> are Maintained under chain of custod water sai�lples are p <br /> Y Once collected uz the field laced in a <br /> Y until delivered to the laboratory , all samples <br /> The chain of custody document includes the ob number' <br /> requested, sample identification, date and time Collected,er <br /> chain of custody is <br /> Signedtype of preservation, if <br /> surrenders the s g and dated )including time of trona the bsanlple collector na analysis <br /> maples, beginning ) } each name The <br /> Personnel g wrtli the field personnel and eildii per who receives or <br /> g with the laboratory <br /> A laboratory supplied tri blank <br /> 20 samples, 5°10 tri P arils accompanies each sampling set For sainplin se <br /> compounds as the ground Water secluded The trip blank is analyzed fol <br /> g is greater than <br /> ampler some or al of the same <br /> u requested by Unocal Corporation, the <br /> during sampling activities is trans purge Fater and decontamination <br /> Rodeo, California Ported to Tosco — San FranciscoArea `rater <br /> generated <br /> Refinery, located in <br /> i 23ZGect�erRy�„ <br /> i <br />