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a MM IM purging is continued until all three physical parameters assessing sufficient gorging. have stabilized. Specific conductance (conductivity) meters are .ead to the nearest ±10 umhos/cm and are calibrated daily. pfi teeters are read to the nearest X0.1 pH units and are calibrated daily. Temperaturufactur r'ss read to 'spectfications.he nearest 0.1 oCollected F. r Sieh ofphysical parameter meters will follow manufacturer's purging activities will be entered on the Well Sampling Field Data Sheet. in low yield formations, the well is purged such that the 'standing".rements ater is removed and the well is allowed to recharge. (Normal field lly recorded during the purging process.) In situations where recovery to 80% owilf static water level is estimated, or observed to exceed a two hour duration , a sample melte e collected when sufficient volume is available for a same le fAttempts will be made soc Jewell is into thenot well purged dry such that the recharge rate causes the formation water to cas In wells where free-phase hydrocarbons are detected, the recorded'. Agportio will be bailed from the well and the estimated volume removed recorded'.hydrocarbons to the sample will be collected if bailing reduces the amount of free-p as conducted using point where they are not present in the well. Well sampling . However, if one of the aforementioned methods depending on the formdsampie will not tioi free-phase hydrocarbons persist throughout bailing, then a groundwater be collected. sage the Volatile organic groundwater samples are Goll volatiles from l>vingted so that air sstrip VIVA from the sample does not occur or is minimal (to prevent le down the side m the samples): sample bottles are filled by slowly running the same bottle until there is a positive convex meniscus over rteni meck of theniscus, and the bottle; the ewteflon p sitioned again p side of the septum (in cap) is p° The absence of an air tightly; the sample is inverted and the bottle lightly tapped• bubble indicates a successful seal-, if a bubble is evident, the cap is removed, more sample is added, and the bottle is re Chain-of-Custody le containers are labeled with a unique sample number, location. and Groundwater same laced in a date of collection. All samples are logged into a chain-of-custody form of California chilled ice chest for shipment to a laboratory certified by Department of Health Services. RESNA INDUSTRIES, fNC, Groundwater Sampling Protocol Latest Revision: October:3,1991 --- - rnlanm�.ww�IRlrc'J6�la�on