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STANDARD OPERATING PROCEGURE GROUNDWATER S proceduresAMpLIN for the collect Orl n or ohandling ler-R an field Personnel adhere to th s following itheanalytical laboratory ple Gett Y prior to analy s determined Loss prevention of volatile P performed i sis is matntained of groundwater samples 4analysts to be p collection, the V. sample Preservation for subsequent analy ed using compounds is controlled and haS, hydrocarbons is determined presence or absence of freeif present, is measured turementsneara e prior to samplinest g, the p robe Prodthe uct thickness, aM MC flexr -dip interface p In addition, static water level meas 0 01 foot and is noted in the field notes of three robe and are also recorded in the field notes um collected with the Interface p each well is purged a minim or polyvinyl priord and to sampling, colle-cleaned pumps stack, suction re me tired a minimum of After water levels a` of Ovate eus n9 pre cal conductivity stabilize well casing volumes Hand electric parameters Temperature, p continues uniil these p chloride bailers the purging purging three times during disposable bailers The water s are collected using Chevron -designated deep reserved containers, Groundwater sample ro riate containers Prep reserved containers ossible When Prep le as appropriate samples are transferred from the o ed aelaree utsed when P reserve the same quality supplied by analytical labor is instructed to P to use in maintaining the laboratory for the laboratory job number, are not svaslable, collected and the sample Duplicate samples are The samples are labeled to Include e Dup ualit control standardsanalysis, preservation (sf any), for as q y collection date and time, en a cooler, maintained at 4 ondert chain sample identification, les are placed aintained collector`s Initials The water same all samples are rn the laboratory Once cone abo laboratory field, ted to analyses custody until delivered to the e of preservation, if any, ab number, type the sample coltector's name document includes the) b each person who The chain of custody,pientification, date and to cl+s collected, of transfer) y with the requested, camp is Signed and dated � with the field personnel and ending The chain of custody les, beginning receives or a surrenders the camp ten sets greater laboratory Per ren set For samp 9 tri blank accompanies each sampling ed p The trip blank is analyzed far some or all o A laboratory spl�o�o trip blanks are included than 20 samples,s the groundwater samples compounds any, the purge water and decontamination the same comp a evron USA products Comp transported by IWM to McKettrick Waste As requested by during sampling activates Is water generated management located in McKittrick, California 5OP5f96 0