Laserfiche WebLink
y - - <br /> AEGIS ENViRONMENTAL, INC. <br /> STANDARD OPERATING PROCEDURE <br /> RE: GROU!SDWATER PURGING AND SAMPLING <br /> SOP-7 <br /> lin each well is purged by evacuating a minimum of three well <br /> Prior to water samp g, will continue until either the 6ischarg <br /> volumes of groundwater. When required, purging <br /> When practical, the <br /> e water temperature, <br /> conductivity���pH stabilize, <br /> well is ba'ikeddry.ten well-bore volumes <br /> of groundwater have been <br /> groundwater sample should be taken when the water levo'i.^.the well recovers to at least <br /> 80%of its static level. <br /> r or stainless steel <br /> The sampling equipment consists of either laTeflon b aitem 15 aedkc3ted to the well,then <br /> bladder pump with a Teflon bladder. if the sa P 9 PVC with a polypropylene bladder. <br /> the bailer is usually Teflon, but the bladder pump milliliter ml lass, <br /> In general and depending on the intendedlaboratory <br /> Teflon <br /> septa, <br /> eo a areyused asysample containers. <br /> { volatile-organic-analysis {VOA} vials, with Teflon s p , <br /> The groundwater sample is deco i tell coo isquicklyof the vial. The <br /> VOA <br /> ly secured to the top mer that there is <br /> no meniscus at the top of the via P <br /> vial is then inverted and gently tapped to see if air bubbles are present. if none are <br /> present, the vial is labeled and refrigerated for dedVe <br /> include auniquet sample identification <br /> the analytical laboratory. Label information sim type of analysis requested and€ the <br /> number, job identification number, date, time, <br /> F i <br /> sampler's name. <br /> quality control purposes, a duplicate water sample is collected from each welh This <br /> For q ty When required, a trip blank is prepared'at the <br /> sample is put on hold at the laboratory. <br /> les, <br /> laboratory and placed in the transport cooler. It is labeled similar to ty the realong samples, <br /> the <br /> remains in the cooler during transport andis analyzeel blank mayprepared <br /> prepared in the field when <br /> groundwater samples. In addition, a fie or bailer <br /> sampling equipment is not dedl DredThe <br /> fwas heel,blank is to use infthe next well, and is <br /> has been either steam cleaned properly <br /> anal zed along with the other samples. The field re I nt crossycon ami ation.tes the <br /> y procedures to p <br /> - effectiveness of the in-field cleaning p . <br /> 'then steam cleaned or properly <br /> To <br /> minimize the potential for cross-contamination between wells, all well development and <br /> water sampling equipment not dedicated to a we is <br /> washed between use. As a second precautionary measure, wells are sampled order <br /> analyses. <br /> of least to highest concentrations as established by available previous <br /> Iri ATTACHMENT15CP-Mune 1990 <br />