ARCHIVED REPORTS_XR0004785 - Laserfiche WebLink

Home Browse Search

s i STANDARD OPERATING PROCEDURE GROUNDWATER SAMPLING Gettler-Ryan Inc field personnel adhere to the following procedures for the collection and handling of rior to le lection,the type of groundwater samples prior to analysis by the analytical laboratory olalecom compounds conitrolled and sample analysis to be performed is determined Loss prevention o P preservation for subsequent analysis is maintained Prior to sampling,the presence or absence of free-phase hydrocarbons ot determined ��i�iotedun the field notes an interface probe Product thickness,if present, is measured to In addition,all depth to water level measurements are collected with a static water level indicator and are also recorded in the field notes, prior to purging and sampling any wells After water levels are collected and pnor to sampling, if purging is to occur, each well is purged a pumps or minimum of three well casing volumes of water usingconductivity are measured a minimum of three ti, suction, mes disposable bailers Temperature,pH and electnca y during the purging Purging continues until these parameters stabilize Groundwater samples are collected using disposable bailers The water samples are transferred from the bailer into appropriate containers Pre-preserved conotiavailab ePthe)laboratory)islinastructed to,preserve • when possible When pre-preserved containers are the sample as appropriate Duplicate samples are collected for the laboratory to use in maintaining quality assurance/quality control standards The samples are labeled to include the job number, sample identification,collection date and time, analysis,preservation(if any), and the sample collector's initials The water samples are placed in a cooler, maintained transport delivered to the laboratnce ory collected in the field, all samples are maintained under chain of custody until The chain of custody document includes the job number,type le collector's namef any,analysis chain of ustody ids sample identification, date and time collected,and the sample signed and dated (including time of transfer) by eachperson who receivesr surrenders the samples, beginning with the field personnel and ending with the laboratory personnel ter than 20 A laboratory supplied trip blank accompanies each sampling r all ofthe samelinsets acornpounds samples, 5%trip blanks are included The trip blank is analyzed for some o as the groundwater samples As requested by ChevronTexaco Company,the purge water and decontamination water generated during sampling activities is transported by IWM to McKittnck Waste Management located in McKrttnck, California N`callformavormslchevron SOP 03 15 04