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M,,hLi , U. ILIN6 1,J.lc1! (()1 WANY 'Z_
<br /> `.IiRri,l.L !I1PUUNCMN : i,MURE AND
<br /> P"I Cl- i,tJ)hr PLAY
<br /> l 0,,NT 'W�jkn PLAN
<br /> 1 rjak 0 ;4ca6rnc;nt work ( Endangerment Assessment, Feasibillty
<br /> ir,ui , wase 1 , m.;r,t ui ARARs ) must consider potential beneficial uses in
<br /> I1,,,, to Ir• , .hat u;65 of grounu water. Thr meter-Cologne Water Quality
<br /> of both „cl. ral and potential uses. Since removal
<br /> Of traatnrerlt affects beneficial uses (water cannot be used
<br /> tf it is n.,I ner�) , replenishment of the aquifer must be included in
<br /> ,r,.v.. lot,1rrenc or the ARAR� and Feasibility Study.
<br /> ,1 ,,' ,,,1 .;.tract with ground water is another potential exposure route (page
<br /> 1 a ) chat r.� as to be considered to the Endangerment Assessment. The
<br /> site bili cci.tribution to 3rourd water contawination (teaching effects
<br /> „,-I pot.entiot ) is onolher data gap ( page 3-25) to be included In the
<br /> inanngermcnt Assessrriunt..
<br /> 3. 1 . ilii hn ,, _ th; Sark, concern regarding svparatlon of proposed monitoring
<br /> cell screen intervals discussed in our 25 November 1987 comments, It is
<br /> imi,urLant to sample separate aquifer zones to obtain the most meaningful.
<br /> results . Also, as discussed in our 25 November comments, not installing a '
<br /> shallow [one ::ell in the initial cluster leaves a data gap. 1 wilt agree,
<br /> howuver, that the necessity of o shallow cone well can be decided after the
<br /> initial data has been collected.
<br /> a • it is assumed, sine, It is not statea, that all wells will be developed by
<br /> Oil' sw•giny na Io the Past-
<br /> 5 Nuw ..ails should be so.kpled initially for Arsenic and Copper to maintain
<br /> hackgruund ,lata.
<br /> c Storm w., ter „mples need to be collected as composites or series grabs as
<br /> jlscu:•seo Is. our 2 October 1987 ccximents. Additionally, it appears that
<br /> there arc dr„inage ditches along Coolidge. Carrot . Dawes, and possibly
<br /> Wagner Av..nues but no storm water sampling 16 proposed for these points.
<br /> ,ere there ( Ischorgus at these points? If so, sampling needs to be
<br /> I-arlurmcd.
<br /> 7, it,u data and documentation for the 16 to 22 January 1988 aquifer
<br /> testing dt .c.u.>rd in the Workplan needs to bb submitted to our office.
<br /> :• : .len P,.,I rang, 0,;pjr•t.munt of Health Services. Sacramento
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