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AM <br /> 1992 3rd Qu Actieilies,Si!e C"dc 1013 <br /> City of SimMim,Fire S,linn <br /> September 22,1492 <br /> Page S <br /> GROUNDWATER NlONl'!'ORING <br /> ped by <br /> t ust 13, 1942, monitoril',g "'ell A4W 1 was monitored 11I'hc vvcll�lvti`ls then pure will, SNA s <br /> On Angust parameters (p'-4, <br /> Groundwater Monitoring Protocol on file with the PH�otEiHD' Groundwater <br /> removing at least 3 well volulnes of water (18 <br /> g� <br /> re and conductivity) vvcre allowed to stabilize prior to sample collection. Thefieldtetnpe.ratu , <br /> purge log is included in Attachment 3. <br /> le <br /> l to RESNA's Environinental Laboratory. <br /> Agroundwater sample was collected using a twrotoclo disposable hand bailer. "rbc water sag011S, <br /> was then transported under chain-nf custody p <br /> The sample was analyzes! for UrLX and TP14D11r!zed ill T bl1e 2110l abora ory datal1s11occts and <br /> T P <br /> respectively. The analytical results are sun <br /> chain-of-custody documentation are included in Attachment 4. <br /> tenderground fuel <br /> d from the site monitoring well <br /> groundwater samples collec <br /> indicate groundwater beneath the site has not been impacted by the former u <br /> 14istorical laboratory results of the <br /> storage tank. <br /> CONCLUSIONSlRECONIIIENDA'rIONS have removed a total of <br /> (Septe <br /> r Excavation activities at tyar ds of suspelctedrdi 1990 el impacsiteted so•.ls g9°n}tile contained no detectable table diesel mer tank- <br /> approximately 490 cable yof <br /> Samples collected from th`�at�ng hatdno impactedewalls soil Gema ns inttlte ground eliminating the <br /> hydrocarbons (Table 3), <br /> potential threat to groundwater. <br /> Groundwater same <br /> les collected from monitoring well MW 1 over a 1 S month period detected no <br /> dissolved diesel hydrocarbons{'fable 2) indicating that <br /> storage�tankcr beneath the site has not been <br /> impacted by the former leaking undergroundpublic <br /> S <br /> tockpiled soils (-5100 ppltt diesel) will be utilized as roadbase material at various City p <br /> works projects. <br /> groundwater <br /> Based upurce W;Al in accordance with <br /> ort successful removal of tile °tction of tilesitemondoringtile jbsence o <br /> contamination, RE SNA recommends <br /> state and local guidelines, and subsequent case closure. Your written conalrrence for c osure <br /> is respectfully requested, <br /> QIJAHTl-y LQ1u9ul92.DKl-* <br /> _ +�IYtl[1Y111741ff #.111�' <br />