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,a...: <br /> �� rt.' S„""S .'"&.,' b.nr +6•-3'+e. ,:�,.:, _ <br /> C9�. <br /> e � <br /> F <br /> rt i� it <br /> 1/ <br /> SIERRA <br /> SES STANDARD OPERATING PROCEDURE <br /> q WELL DEVELOPMENT <br /> €s <br /> 5E�5 cievcloPs ground water nlonsturing;t:,clls nut less than.i8 hours after the placement <br /> of the surface seal (91'outing) to allot%, sull-icieut tiltic for the cement grout to set. The wells are <br /> dcrrin{xd to rcslore the rlaiural hydraulic collductivtly of the forntaliotl(s) to be ntonilorcd and <br /> h to remove all sand 1111d as much lino-9r;l1at tnalcrial as possible, <br /> Prior to dcvc10Pnlc111.SPS field persolluel nleasurc the depth to water and the total depth <br /> 3 of the well. The total depth measurement is compared t(t the;veli complctian diagram shown on <br /> tau liel(i lag;and ,uly discr(pauctca arc nu[c(l. <br /> Well develaput(nt cotlsists of several cycles of surginf an(I evacuation of water to the well, <br /> each ending;with ttleastlretnerits of temperature, pH, coll(luetivtty, and observation of turbidity. <br /> Surg;tng takes place for several minutes to loosen linesfronl the screened interval. Positiatt <br /> vented surge block several feet belnw the water surface and surge with an upward motion, <br /> Development shall colltillue fur a Period of at least four]lours or when ten well volumes <br /> have been removed,whichever occurs first.and until ground water removed from the well is clear <br /> and visibly free of suspended materials. Note the tante and the 1pproxlntate volume of water <br /> removed prior to each delerminatiotl Of tile. following parameters (and whether well is bailed or <br /> pumped dry): pill, temperature,and spoiNfic colic]uctivity. 'lllese nteasurculents Should be Made <br /> a mhlilnunl of fiv_ times during,well development. <br /> If the water is stili cloudy after tae four hour period but these three parameters have <br /> stabilized, then the well will be considered developed regardless of the volume of wsder purged <br /> front the well. Stablhr:aiort of PH, temPcrutu['a'. and specific conductivity will be considered to <br /> ]rave occurred when these parameters undergo changes <br /> not exp-Ceding;:to.1, 0.5 degrees F. and <br /> g percent, respectively. <br /> fly--,:1 <br />