ARCHIVED REPORTS XR0001215 - Laserfiche WebLink

Home Browse Search

STANDARD OPERATING PROCEDURE - GROUNDWATER SAMPLING ' Gettler-Ryan Inc field peisonnel adhere to the following procedures for the collection and handling of groundv,ater saniplcs prior to analysts by the analytical Iaboratoi3 Prior to sample collection,the type of ' analysis to be pei foimed is deteririined Loss prevention of v olatile compounds is controlled and sample piesei�,ation for subsequent analysis is maintained Prior to sampling the piesence or absence of free-phase hydrocarbons is detennined using an interface probe Product thickness, if piesent, is rneasuied to the nearest 0 01 foot and is noted in the field notes In addition all depth to watci le,.el 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 eater levels aie collected and prior to sampling,, if purging is to occur, each well is purged a minimum of three yell casing volumes of N\atei using pre-cleaned pumps(stack, suction Grundfos),or disposable bailei s Temperature,plt and elccti real conductivit} are measured a rninimurn of three times during the purging Purging continues until these parameters stabilize I Groundwater samples aie collected using disposable bailers The water samples are tiansferred from the bailer into appropriate containeis Pre-preser-,ed containers,supplied by analytical laboratories are used ' \.when possible NVIien pre-presen ed containei ,are not a-\ailable,the laboratory is instructed to preserve . the sample as appropriate Duplicate samples are collected for the laboratory to use in maintaining quality &,suiance/quality control standards The Samples are labeled to include the job number sample identification collection date and time analysis pieservation(if any) and the sample collector's initials ' The vatei samples are placed in a cooler maintained at 4°C for tiansport to the laboratory Once collected in the field all samples aie maintained under chain of custody until delivered to the laboratory ' The chain of custodx document includes the fob number,tvpe of pi eser-,ation if any,analysis requested, sample identification date and time collected and the sample collector's name The chain ofcustody is signed and dated (includim, time of transfer) by each peison vvlio recei,,es or surrenders the samples beginning %%ith the field personnel and ending vtiith the laboratory personnel A laboiatoiv supplied flip blank a"ompames each sampling set For sampling sets greater than 20 sainples 5%trip hlanks are included The trip blank is analyzed for Sonic or all of the same compounds as the groundwater samples As requested by Che\lora f_riyironniental A/lanagenient Company, the purge water and ' l � � decontamination t\atei genciated dui ing sampling actin ities is transported by IWM to Chemical Waste Management located in Kettleman Hill California 1 h'Cihionim foniis chevron-SOY]Ah 2006 1