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TABLE3 <br /> QUALITY ASSURANCE SAMPLE REQUIREMENTS <br /> MOUNTAIN HOUSE SITE DEVELOPMENT SITE#6 <br /> Tracy,San Joaquin County,California <br /> FREQUENCY <br /> QA/QC SAMPLE Soil Groundwater Wells Grab Groundwater <br /> Field Equipment blank None One per each type of sampling device per day One per each type of sampling device per day <br /> One per groundwater sample shipment(only if EPA One per groundwater sample shipment(only if EPA <br /> Field Trip blanks None 8015M analysis for TPHg or EPA 8021 B/8260B 8015M analysis for TPHg or EPA 8021B/8260B <br /> analysis for BTEX will be conducted). analysis for BTEX will be conducted). <br /> One per sampling event if more than five samples are <br /> Field Duplicates None collected during that event;if less than five samples One per sampling event if more than five samples are <br /> per event,then one per year collected during that event <br /> One per analytical batch(minimum one per 20 One per analytical batch(minimum one per 20 One per analytical batch(minimum one per 20 <br /> project-specific samples);if more than five samples project-specific samples);if more than five samples project-specific samples);if more than five samples <br /> Field/Laboratory Matrix Spike per event,an additional site specific MS/MSD per event,an additional site specific MS/MSD per event,an additional site specific MS/MSD <br /> sample should be collected and specified in the chain sample should be collected and specified in the chain sample should be collected and specified in the chaim <br /> of-custody of-custody of-custody <br /> Laboratory Method Blank One per analytical batch(minimum one per 20 One per analytical batch(minimum one per 20 One per analytical batch(minimum one per 20 <br /> samples) samples) samples) <br /> Laboratory Control Standard One per analytical batch(minimum one per 20 One per analytical batch(minimum one per 20 One per analytical batch(minimum one per 20 <br /> samples) samples) samples) <br /> Laboratory Surrogate Compounds Every sample as specified by the analytical method Every sample as specified by the analytical method Every sample as specified by the analytical method <br /> Abbreviations: <br /> BTEX=Benzene,toluene,ethylbenzene,and total xylenes <br /> EPA=U.S.Environmental Protection Agency <br /> MS/MSD=Matrix spike/matrix spike duplicate <br /> QA/QC=Quality assurance/quality control <br /> TPHg=Total petroleum hydrocarbons quantified as gasoline <br /> ...erva.... <br /> Page I of 1 rmm science to Soe,rlons <br />