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mm ‘ i ^ *W •, 'av.-.r ii^'"Sill'"’#.‘ --i <br />|r^*‘ <br />Ti'- ■ '.mm' <br />1;?^:^ ■ <br />fen <br />!?& • " ■"*life"" <br />■ ■ <br />M0S.:f-S> ■ "> ■ <br />K^!|g.V C'-‘ .-'. . <br />ife: <br />f%:.iv. <br />'§^' ^m.. - <br />m0- mg <br />^nv^■ •■ • <br />m <br />ife*-' >4: <br />.* <br />iii.,i <br />'v 2kf> -V ; , -P|3?# ^ <br />%Wm.Ml'!-' c«^r-." ■' <br />»i ■ <br />>«r“- V •.'' ?^ ■ .. 'm.mm: <br />,».■ <br />1 <br />2 <br />3 <br />4 <br />5 <br />< <br />7 <br />f <br />10 <br />11 <br />12 <br />13 <br />14 <br />15 <br />IS <br />17 <br />19 <br />20 <br />21 <br />22 <br />23 <br />24 <br />25 <br />2S <br />27 <br />20 <br />29 <br />30 <br />31 <br />32 <br />33 <br />34 <br />35 <br />30 <br />05/13/91 iRr/ISCR J C.MR/30 ARia34 <br />essipouftd plACtd in tfi* tanic syscea* is sufficitntly volaci**« <br />such as qasolln*. to tssult In a vapor level that is detectable <br />by th« aonltocing devices located in the excavation tone in the <br />event of a re>lease froa the tank; <br />(3) the measurement of vapors by the monitoring <br />device is not rendered inoperative by the groundwater, rainfall, <br />or soil moisture or other known interferences so that a release <br />could go undetected for more than 30 days: <br />(4) the level of background contamination in the <br />excavation sons will not interfere with the method used to <br />detect releases from the tank; <br />fS) the vapor monitoring points are designed and <br />operated to detect any significant increase in concentration <br />background of the regulated substance stored in the tank <br />system, a component or components of that substance, or a tracer <br />compound placed in the tank system; <br />(6) in the underground storage tank excavation <br />tone, the site is assessed to ensure compliance with the <br />requirements in subitems (1) to (4) and to establish the number <br />and positioning of vapor monitoring points that will detect <br />(•Icatss within the excavation tone from any part of the tank <br />that routinely contains product; and <br />(7) vapor monitoring points are clearly marked <br />and secured to avoid unauthorised access and tampering. <br /><j. Testing or monitoring for liquids in the <br />groundwater must meet the provisions of chapter 4725, pu^t <br />m <br />comply uith local approvals or permits when located within _a <br />local public rleht-^f-wav, as well as meet the following <br />requirements: <br />CD the regulated substance stored is immiscible <br />in water and has a specific gravity of less than one; <br />(2) groundwater is never more than 20 feet from <br />the ground surface and the hydraulic conductivity of the soil <br />between the underground storage tank system and the monitoring <br />wells or devices is net less than O.Ol centimeters per second, <br />for example, the soil should consist of gravels, coarse to <br />•v n««isaf <br />\ <br />% <br />•i^ <br />& <br />1