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Mr. Shawn Kelley _ R <br /> Page 4 <br /> December 8, 1999 <br /> the using will be lowered to the bottom of the borehole,leaving a slotted interval above the oununeooe of <br /> groundwater to observe for Boating product.The sand pack will be placed to a point about two feet above <br /> the slots. A bentonite sea! will be placed atop the sand pact, and a cement grmt seal placed atop the <br /> bentonite using a tttmie Use,filling fiam the bottom to top of the borehole.Traffic rated wellhead access <br /> bot and socanty device will complete the well. <br /> Mmoitorm well Smotioe and DOOMM ent <br /> All monitoring wells will be developed to remove the drilling mu*grade the and pads and provide a <br /> more complus hydraulic connection to the aquffer. A well development log will be kept of the well <br /> volumes removed until the water becmaes clear and the amourn of sand pumped is mm®al.The well Will <br /> be allowed to rawer for at least 72 hours prior to sampling The well casing will be surveyed to a(mown <br /> datum to accurately measure groundwater elevauao contours. <br /> Chemical Antics <br /> Three (3) groundwater samples will be analyzed at a State catifxd analyicak laboratory from the <br /> monitoring wells. These samples will mil ally be tested for the foilowiog Taal Parokum Hydmcubons <br /> as Gasoline (TPHG) Diesel CMM). Benzene (B). Toluene Cr'), Ethyl-benzene (E) and Xykne (7 ). <br /> Methyl-tert-butyl-aper(MTBE) and feel Oxygenates, 1.2 Dichlomethane and Ethykoe Drbromide using <br /> EPA Methods 3510190157 8020, and 8260. Subsequent sampling of monitoring wells Will oocav at <br /> quarWy intervals or as regwad by PHS-EM The analysts will be rum on a normal turnaround <br /> REPORTS <br /> A Preliminary Site Assessment Inveshgttion Report will be prepared after Phase One for mnew by <br /> tv"Builders Supply;this report will then be forWarrhed o the PfiS EIS once approved TIM repot will <br /> include the field methods, permits,exploratory boring loge,chemical analytical data and report narrative <br /> of site bydropok yV and mmamieent diaan7mmon,and conclusions and recommendatmns for Phase Two <br /> site wort (groundwater monitoring wells, quarterly sampling). After Phase Two work (if rapred) all <br /> assessmem work will be nrmmarfzed in a final report, including any remmmendatimns for further work <br /> Quarterly monitoring reports will be prepared atter each mtmitunng well sampling event and forwarded o <br /> PHS EHD as required <br />