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<br />4.2.7, l Levc! .Stv(~c(re.c m+r(//iglt-High Alnrm for K7rock-Out Tnnk Leve(Cnnn•o( <br />The knock-out tank will be installed with two Icvcl switches, and one high-high alarm, <br />manufactured by Pneumercator (Model LS G00 O/W Icvel interface switch) The level <br />switches shall be connected ro a control panel mounted on the sirlcwall of the'AST berm, <br />also manufactured by Pneumercator (Model LC 1000 alarm console). The high level <br />switch will be install to activate the evacuation pump (described in Section 4.2.4) when <br />the knock-out tank has reached a Icvcl of no greater than sixty percent (GO%) of i[s <br />designed holding capacity. Sufficient headspace in the knock-out tank must be <br />maintained [o inhibit the draw of fluids into the intake of the blower or vacuum pump. <br />"I'hc low Icvel switch will be installed to deactivate the evacuation pump when the knock- <br />out tank has ruched n Icvcl o(no grotto' than ten percent (10%) of its designed holding <br />capacity. "hhe high-high alarm shall be connected to terminate power to the blower in the <br />event that the Iluid level in tltc knock-out uutk exceeds eighty (S(1'%) of its total capacity. <br />fhc Icvel switches and associated incidentals shall be explosion proof and intrinsically <br />sale, and will be chemically compatible to resist corrosion or deterioration by the fluids <br />recovered by the system. <br />4.2.7.2 Lere(,Slr(~clre.cunt(!(igh-l(ig(+Alnrmfirr',Separ'utor(evelCunhu( <br />Tltc oil/water separator will be installed tvilh two Icvcl switches, and one high-high <br />alarm, manufactured by Pneumercator (Model LS 600 O(~V Icvcl interface switch) The <br />Icvcl switches shall be connected to a control panel mounted on the sidewall of the AST <br />berm, also manufactured by Pneumercator (Model LC 1000 alarm console). The high <br />level switch will be install to activate [hc discharge pump (described in Section 4.2.G) <br />when the treated water basin in the separator is approaching its operating capacity. The <br />low Icvcl switch will be installed to deac[ivute the discharge pump when the treated water <br />basin in the separator has reached a predetermined low level. "fhc high-high alarm shall <br />IiRM-Roct:y Mountain, Inc. 1 O Printed on Recycled Paper <br />P:\1000\SWPC\9Gt0121\Design Doc <br />