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I 'tt <br /> I i <br /> { I r h <br /> i � CALIFGFNIA GEOPHYSICAL WATER SAMPLING PROTOCOLS r � <br /> J " Water Sampling Procedures <br /> I <br /> { <br /> The equipment used to withdraw water from the well will be a PVC <br /> I or stainless steel bailer or an electric pump. All equipment <br /> including the bailers , balling card, water depth measuring <br /> devise , pump, electric li.nes , and hoses must be deccntaminzted <br /> c prior to entering any well . They will be decontaminated by ; <br /> washlnc with nonphcsphate detergent and rinsed witn tap water . <br /> k <br />� The weJ.l well be measured, purged, 'remeasured and a water sample <br /> will be taken limedlately after reneassring. ti <br /> MEASURING { <br /> The dept.ft to around*grater will be measured from the hia esz Fcirt <br /> cn ,the toc of the casing to the surface of tae water table . .Tris <br /> J � <br /> point isJmarke% with black cn the casing. ' The measurinc devise <br /> used will be an electric conductivity devise which trips a re <br /> liana and/cr a buzzer wren the Froce t:,=EZ `N-.,r- A mlPlr'u- c; <br /> thrC!e measurements will be made at e=cn well , -=e final reading <br /> will be acted after 2 cr more readings do rcz very }✓v mcre I t.F-:'0 . 01 feet. The tct_1 depth cf the well. will also be re-=s-rel <br /> This information alcnc with water paramnaterz me.^.tidied lacer will ° <br /> . b-2 entered onto ' tne sazpling snest. The casing vclul-e wl?l be <br /> talc.. tad accOrdina tc the fcr-nul a Cr San- na <br /> 11 - sneat_ <br /> i- FREE FROCUCT <br /> The presence of flcatlnc free prcduc, will be cnec:Kad b� <br /> rec;rdina the death ci <br /> the water and mar'{=:"jC t_^.fit lE'Te?'J cn the <br /> Frcpewl,rc. The prcce and wire' will be w;.t.draT�=, from ,tn_ well <br /> i and dried. Licuid `Pasta or chalk will be placed cn tZe Frcbe a-d <br /> uc the side of the wire for 2 feet (cruld be higher ds_ending cn , <br /> the death of the Flune) . The prcne is then carefullv ! lcwered <br /> into i the well so t, at tae probe just tcL'cies the wataw t-ahle , <br /> car,s , will be taker not to lower the prcce below the water table �I <br /> Cnca 4t_le Froce has bu=Zed at t7e water tayle it is fvitndrawn !i <br /> I <br /> quickly from the well a::d the liquid leval a:cve t.e water le,7el E ,, <br /> i <br /> coin` on t_^_e probe is recorded. This differantial retheen the = <br /> llgu?d level 2na the prose water sensing point is the floating' <br /> product thickness and will be recorded on the sampling sbeet. � i <br /> Watesamples willl be obtained as, fkollows ; <br /> r <br />' A) First, cn'e casing volume of water will be witndraNn from the <br /> I well ; <br /> E ) The parameters of pH, conductivity and tencerature will be <br /> . measured. The color,, odcr and presence of a sheen of the purge: <br /> water will be noted; i <br /> C) A 2nd and, 3rd casing volume of water will be withdrawn and the <br /> Parameters remeasured, if the iresults from the third measuring <br /> J <br />