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DAMES &. OORE <br /> Renown Enterprises, Inc. <br /> october 3, 1988 <br /> Page Three <br /> : Sieve analyses will be conducted on selected soil samples <br /> collected below the water table during our soils investigation at the site to <br /> pre-design screen and filter pack for the new monitoring wells. However, if <br /> the geologist in the field observes substantially different conditions during <br /> drilling, additional samples will be submitted for analyses as needed to <br /> properly design the wells. <br /> pmt: ,Will you test for, sample, and analyze any immiscible <br /> layers when sampling the monitoring wells? We recommend that you do." <br /> Each site monitoring well will be tested for the presence of <br /> imiscible layers following installation and development by lowering nga deed <br /> acrylic bailer into the well arra recovering samples of the top <br /> luid <br /> column Pr's. The estimated thickness of the layer and other pertinent <br /> of the sample will be recorded in field <br /> observations about the appearance <br /> journals. However, we do not anticipate testing these samples until specific <br /> data needs are identified. <br /> DHS : v%qe recommend that a nonphosphate cleaner be used to <br /> decontaminato equipment (i.e. Aleoncx)." <br /> We are not aware of instances of water sample contamination <br /> ted cleansers such as TSP which would not be <br /> caused by brie use of phosphated ation blank normally collected before <br /> revealed by testing thheefield decontamination <br /> well sampling. Ha ever, as a precaution against possible contamination, we <br /> will obtain and use Aleonox or a similar nor#1osphate cleanser for cleaning <br /> sampling equipment used at the site. <br /> We reccumend that you forward a cope of this letter to Imo'. Bill Kilgore <br /> ons <br /> at the DHS at your earliest opportunity. If you have any guest' ► please <br /> do not hesitate to call. <br /> Very truly Yours, <br /> DAMES & MDCRE <br /> Daniel W. Matthews <br /> project Manager <br /> DDdrI:akc <br />