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The well log for the new well is found in Appendix "E" and illustrates that the underlying soil
<br /> consists of intervening clay and sand strata. However, the sand strata are dominant in thickness in
<br /> comparison with the clay strata. It is hypothesized that there is sufficient clay strata thickness to
<br /> attenuate the downward migration of nitrate from this region, otherwise, the water well
<br /> concentrations would have been much higher, in all probability.
<br /> 1. GROUNDWATER ANALYTICAL TEST RESULTS
<br /> The well water test results indicate a concentration of nitrate of 21 ppm nitrate for the new well
<br /> and 36 ppm nitrate for the old well. These nitrate concentrations are relatively low, particularly in
<br /> the old well, considering the intensity of the farming and dairy operations which have taken place
<br /> in this region over the last several decades. Both DBCP and its related compound ethylene-
<br /> dibromide (EDB) were Below Detection Limit (BDL), which is equivalent to non-detect (ND).
<br /> In addition to the groundwater test results on the dairy barn wells completed for the Soil
<br /> Suitability Study, as referenced above, groundwater samples were obtained from backhoe test pits
<br /> to assess the top groundwater. As explained,the nitrate concentrations are what would be
<br /> expected. However, more interestingly, is the apparent influence the Tom Paine Slough has on
<br /> the nitrate concentration in the water table. If there was no groundwater movement, either toward
<br /> the Slough, or Slough water flowing outward, a higher nitrate concentration would have been
<br /> observed in the parcel 3 backhoe test pit. Since this test pit is downgradient from intensly farmed
<br /> land, it may be theorized that water from the Slough is flowing either outward, thus causing a
<br /> dilution effect, or inward,taking up nitrate. A summary of the selected water test results are as
<br /> follows:
<br /> TABLE 4
<br /> -aea,;-rs�}�a3r:a�sa e-M'1_1_;m11
<br /> s.@ ;ai= d3iae ,._ y a 'le"a '>,;ssa,:.. ;;>9f.f @: '3@, :�.. IS 1 . ,..,.., aa;a' `v"°'se rs i, 3s? ;..': sae. :.ee; :AWA' ' ANA`LYSmm=: :. , . ? ye@ v- " 3a a a l'i .' i,a '!s t- i€h '" '@ a :gi ,@ - u�a @9 i -i@¢ ��a. sr k,t- i E EY f _ 0 @( s s 3 p, .`"'4
<br /> '° �TWC}I OM STZC'WELLS TOP GkOUNpWATIERIANDy TOMS;PAtInd
<br /> % B } L i3 3 I h'..»s 9� -t6 t@ €F -i�, E @ 7.. 46gg€ < Sg f 9Y....' }
<br /> .%s<• ui,a "3 € g3:;9 er.Sm ia;i a'°a?y.a�sa°' a s¢` E '�j' ��E{`4f}.` 9 E .t£l@ i;l ;� a NMI
<br /> ..aaMw 'S'€.r3 1'a'e 3 8 °@°iH�-SLOUGR. 5¢°s¢i';Ya';% @i@ i i a;atKI .?� 7y�' ; s 3.: r-f r] ,&s<€:i
<br /> d��-,e' .P.,:.n.a.E° ,>3°`,�e.,,,�s ,w:aa °n :§�'�"" m4ri,.lf3 m;:;aoaa• ka;a,..< ..rsu:a,f'a�'' f#r
<br /> aS.S?
<br /> m„��>9y@e°•=Ya:d:a�P }y 9a. �y9:1°.8:96:°•'•F..°^Y«'Id:fsB98:8°«°4.°�.�• 848.y:.<e- VON
<br /> C. [:q:t�<g.««• -.
<br /> ° SAMPI:E 3 ,;y°,va. NITRATE �e€.�� ;. �@ @P ,, l;t; €:
<br /> €°dsa� g 'OTAi, sols@a.pBCPLEDB f#' @C1TAL;s`si;I= j
<br /> �. ..:..y.,,,f.ss » f k P. ;
<br /> r
<br /> . atlt EF £f'.�=5'S�`"• C 6EEE:t€elf S,Lh�"�'3l 11R$ J
<br /> c °¢ ' s
<br /> f Y "�� E"
<br /> LQCATION ASND r AL ITITY
<br /> ¢. -. ,f g� y. 3) , ;:.. p I' (}SPIE)RO'[.�
<br /> €¢ M-3
<br /> R-M,41,5 jari<°9w, i YE<,..,E,,..f:ix:.:� I§ a b;d.. I.
<br /> .. &P ::......«-.,.»..^> »<.S.t.,.t.,;sEa,Fb'-Y . eff Y!a:a, �a'f
<br /> �sef ' .a,d•d'4 ri
<br /> ,",a:..rd.us:¢tu°s^^:,,;a.o.r.h.:•8°-°t,"a»». &,t:�a:z:rf°�z.,a sve_ -d$$i:r. ,
<br /> NEW WELL 21 ppm N/A BDL N/A
<br /> (Below Detection Limits)
<br /> OLD WELL 36 ppm N/A BDL N/A
<br /> PARCEL 2 - I65 ppm 393 mg/L N/A BDL
<br /> Top Groundwater
<br /> Under Future L.F.
<br /> PARCEL 3 - 8 ppm N/A N/A N/A
<br /> Top Groundwater
<br /> Under Future L.F,
<br /> Tom Paine 4 ppm N/A N/A BDL
<br /> Slough
<br /> 7
<br /> I
<br /> Chesney Consufting
<br />
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