CORRESPONDENCE_1984-1989 - Laserfiche WebLink

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New `roundWater M^^.itc-; nv wel's A new groundwater monitoring system with 10 monitoring wells was installed between June and August, 1957. The locations cf the new Groundwater monitoring wells are shown cn the A Gec_cc _ Site r_an ^raL.•_^.O 4. Mcnitcr.. _ .R`, screen telae water `a. -Ie (20 foot screen lencths' t a.+ r r+rwells t 1s - l MT.1 ,G:e_ �.'� E� �, + -6 MW -3 and XW-4 are located d✓wn- crad_ent cf the existing landfill trenches to determine and monitor the quality of shallowest groundwater that is most 1lkery to be affected by the lan,"4 11. 11 ^cni _c_ _ng ae__.s.. r.;- are locate -d upgra::ient cf Sc,.trL__`r_e'c::ns Creck .a to det_._ine bac}:c`round g ro:.nd»ater q.;a t1° tori^^ wall -5 _s .. �''R located directly uas_a�ie^moi: tren;.:n_s Io reteMir�e the : ardc`Lr4 stics of South I.i=tIejohrs Creek into underlying groundwater. water level measurements will be obtained from this well on a recular basis. _t will be sampled for water quality only initially unless it is s hoi.`n that recharce ®nom the creek is Influencing groundwater quality beneath the _a::rf1ll, in w ich case it will becor+e pert cf th® _ . �_ar• S..__ace we..er `r= ..he creek. ._1_ anv:vsed a.0 .id �:': -ries Qe~..erlirnGtivi�t. wells P!�°•-S, -® and rt -_0 screen feet cf , ` .. the a-^ximGraeiy 40 0 50.ee` 'below the -water ,.n the mos` permeable zones encountered during well logging. These wells will be used to provide de-i..al 0rosn0Wa`er gradients, and water quality in the deeper permeable zones. Monitoring well M'r:-S is located up^radient of the landfill, and MW -9 and I;'w-10 are located dow: -r_a:.le .n .�. i•e_l Cons`1-azt on •i9 o cc_t_y Wit1h the rem 'reme::ts _c_ closure c_ the Class _®- __.............. .. i -- -.:-on the r o_ ward Landfill site, ._ , -e r..ar ..crdng w'E115 were cons err.acted according to the recr-_ en :at®ons cf the prc]ert enzineer from the ca' ifo®nla State DC_✓a Lie::` Gf Health Services, Toxics Substances Cont----: C®.®s®c.. The borin^s were initially drilled with eight inchdiameter, hollow sten augers. A detailed description_ of the s•.:bs; rdace Geology was obtained during drilling using con.._na.ous sampling lZechniques. The cvntinb:c-s cores were saved in core boxes for later inspect®cn. T a soils were �oGGed using the Lr.®r®ed S041 Classic: -at 'on sys rem neve'Icaea by the Bureau cr Reclazla`; -n and the Corms Gi engineers in 2.952. The drillhole logs are included in Appen;.®x A. The borings were then reaued to 10.5 !.h^aes diameter, using hollow stem angers, to provide a bore hole •...:_mac- consI.;z-action c,01 4 inch diameter monitoring webs. F11 drilling and samlingegvirre::t was thcrou^hly steam Cleaned between Well locations.