Laserfiche WebLink
d Mk FtF"'Y?. n <br /> f; <br /> a <br /> e <br /> fifter the drIII tn9, the observation well was constructed using S-tnrh <br /> dldmeter, Schedule 40 PVC casing and O.OZO-inch factory-slotted <br /> screen. Ilse screen was placed through the entire saturated section, <br /> ly IS feet wove the ,t atic water level. Graded <br /> extending approximate <br /> rias placed in the annular space across the screened <br /> sand park <br /> interval , and it extended approximately l lest shove the screen. fl <br /> bentonite and concrete seal extend from the sand pack to the ground <br /> surface. A locking cap and protective vault box were Installed by, <br /> Gettler-ityan on the tap of the i.Eell. The exploratoryQr-in of <br /> 5-f3 and 5-C) were backfilled with concrete after comAl <br /> etidr1111ng. <br /> F i e.l d_(�herr3 c:a1__Anal-ys i s <br /> A portion of each soil sample was used to perforin a head-space test <br /> in the field for volatile organic compounds. The test procedure <br /> involved measuring approximately 30 grams from an undisturbed soil <br /> sample, placing this sub-sample in a clean glass jar, and <br /> covering <br /> the ,lar with aluminum foil secured under a ring-type <br /> ded l . <br /> the jar was placed in a warm water bath (75 to g0 degrees F) for <br /> approximately twenty minutes. Then the foil was pierced and the <br /> head-space within the jar was tested for total organic vapor, <br /> measured in parts per million. with an H- porit -i ohe borarigoings. <br /> detectur. The results of these tests appear <br /> }Ater 5ampling_Procedure <br /> Ground-water samPling was performed by 0ainecrsutnmarizeds of <br /> San dose, California. Their sampling proceduresare <br /> below- <br /> Eefare sampling, the rater level was measured in the well using a <br /> clean tape measure. Next, the observation well was checked for the <br /> presence of floating petroleum product, using a clean, clear acrylic <br /> detected, so the well was purged and <br /> taller. No floating product was <br /> sampled by the following technique: <br /> The well was purged of a minimum of four casing volumes using a <br /> Geotech bladder pump constructed of stainless steel and Teflon. <br /> If the well discharge was extremely turbid, additional purging <br /> was performed to aid in well development, After the purging, <br /> water samples were collected from the pump discharge <br /> andwatplaced <br /> into appropriate EPA-approved containers. All purge <br /> was <br /> drummed in clean department of Transportation-approved <br /> containeed onto <br /> chain-of-custody ground-water <br /> custody documents,eand aweb <br /> placedonicefordtra Sport. <br /> R1.1....samPlil'g_.eguipment was cleaned before sampling the well, by <br /> rinsing-and flushing for a minimum-of--f if sen_.___ _._. _..__.. _..._ __....---...__. <br /> steam-cleaning, volumes. <br /> minutes. This process equates to a minimum of 40 pump �1 <br /> 100-11.01 <br />