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CA <br /> TCE <br /> or <br /> PCE Latest Non-TCE or Other <br /> Equa TCE Latest PCE COC Wells <br /> led Result PCE Result that that <br /> or that Result Equaled or Provide <br /> Exce Equaled that Exceeded More 2017 <br /> Oper eded or Equaled the ACL Repres Significa <br /> ating ACL Exceeded or within the entativ nt <br /> Extr with the ACL Exceeded Last Year Well Location a Trends? <br /> actio in (Concent the ACL (COC and Relative to COC Hydrol (If Yes, <br /> n the ration (Concentr Concentrat Plumes Equaling ogic or Increasi <br /> Well Last and ation and ion and or Exceeding the Conta ng or <br /> in Year Quarter/ Quarter/Y Quarter/Ye ACL-Potential minant Decreas <br /> Well 2017 ? Year) ear) ar) Well Category Data? ing) Evaluation <br /> :WN No NS 12.4 pg/L 0.530 NS Upgradient/cross MW47 NA Shut down in July 2002. <br /> Al in 3Q06 pg/Lin -gradient of 7A Upgradient/cross-gradient <br /> 4Q96 NB COC plumes- of NB COC plumes.TCE has <br /> plume stability. not exceeded the ACL since <br /> 3Q06 and PCE has not <br /> exceeded the ACL since <br /> 1996(last sampled in 3Q10). <br /> MW477A provides more <br /> representative plume <br /> stability data in area. <br /> Sampling not necessary. <br /> EWN No NS 5.20 pg/L 0.70 pg/L NS Upgradient/cross None NA Shut down in July 2002. <br /> A3 in 3Q05 in 2Q97 -gradient of Upgradient/cross-gradient <br /> NB COC plumes of NB TCE plume.TCE has <br /> and screened not exceeded the ACL since <br /> above NB TCE B 3Q05 and PCE has not <br /> Zone plume- exceeded the ACL since <br /> plume stability. 2Q97(last sampled in <br /> 3Q10).Sampling not <br /> necessary. <br /> WN No NS Never 1.1 pg/L NS Located off-site, MW52 NA Located off-site, <br /> A8 exceeded in 3Q04 downgradient of IA downgradient of NB COC <br /> NB COC plumes- plumes.Well shut down in <br /> guard well. 2008.MW521A provides <br /> more representative guard <br /> well data. <br /> MW4 NA NS Never Never NS Cross-gradient of None NA Well monitored TPH <br /> 94A analyzed analyzed SB TCE contamination from UST <br /> plume/upgradien 147.Site expected to be <br /> t of UST 147- closed in 2017;sampling not <br /> plume stability. necessary. <br /> MW4 NA NS Never Never NS Cross-gradient of None NA Well monitored TPH <br /> 96A analyzed analyzed SB TCE contamination from UST <br /> plume/downgrad 147.TPH-d/TPH-g/TPH-mo <br /> ient of UST 147- not detected in 3Q14.Site <br /> plume stability. expected to be closed in <br /> 2017;sampling not <br /> necessary. <br />