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<br /> 1{�, 04V December;2001
<br /> AGE_�C Proecf No: OT-0828" `
<br /> ' Page 3,of 6 .;
<br /> 2_.4.
<br /> GROUND WATER DEPTH'
<br /> ANLL FLOW DIRECTION
<br /> Eased`on,revieW ofthe,L
<br /> Ines of Equal Depth to Gra'undwater;.'F 4
<br /> all 1999
<br /> Joaquan CoiintyFlood Control District and Water ' map,published by•the San s
<br /> 'depth to ound vv Conservation Districi(FCD&WCD),the estimated r,
<br /> kr ater avihe' site is befween 40 and 50 feet below surface .Rr.
<br /> historical ground water depth may-have been between 70 and 80 feet bs grade �bsg) However, ,
<br /> g:"Diii ing the October 2001 +
<br /> • investigation; depth.to first encountered ground water ivas�a ro -� _
<br /> pts . ximately 55'feet-ljsg:
<br /> Review of the mall Lines'of Equal.Elevation o Grou' A
<br /> ndwater, Fall:I999'(FCD&WCD).depicts`the ,
<br /> regtoial ground water:t?a�v direction towards the riortheasi.
<br /> PROCEDURES i
<br /> On 04 and 05 October,200 four soil robe bo
<br /> part of the site assess rings (P-I through P-4)were advanced at"the site'
<br /> merit related to'former I ISTs- The field work was.conducted as-outlined iri the ,
<br />'. AGE Prepared, Preliminary Site Assessrraent TYcirk Plan
<br /> , dated 02'May'2QO l_
<br /> 31 DPILLING a
<br /> ACTIVITIES
<br /> Probe' borings P-1'thz ough P-4 here advanced utilizin a
<br /> with 1.125_'in6h,diameter probe rods WMg'"direct,push'�technology. Probe.bo�probe 5400 equipped ,
<br /> vertically to a depth of 48 rzrlg P-1 was advanced'
<br /> feet bsg for collection ror soil and ab
<br /> ;refusal at;4S,feet=bs reverted ground water samples.. Howevea',
<br /> P ;further advancMent of the sapling rods and a water;saznple'could '•'
<br /> haat be collected. Boring P:'2 was advancedto'65,fe�t bsg,for collection ofsoii and ab''ground saz�nples, borings,P;3'and P-�#were. ed verti d water,,
<br /> .1 acivanc tally to a.depth of20 feet bsg for.collection of
<br /> 1r ... p es. ., , _ • „ ,-., - , ,. - sail ',,...
<br /> Ir 1 � ' 1 7 •''4,
<br /> W3.1 1 ; Sorb Sample Collection
<br /> Soils F;Id
<br /> amples were'.coIlected at foot intervals .to total depth in borings p 1, P_3., p_4.,Soil
<br /> samples were collected'from boring;P-2 at 5400t intervals from-5 feet bsg-to feet bs . E
<br /> sample'was collected utilizing a 1.125" Geoprobe soifsamplirig assembly loaded`witfi four six-inch
<br /> brass.sleeve's:.After collection, the ends ofthe'second brass sleeve were covered`,with Teflon sheets'
<br /> capped and se,'aled,vvith tape. Each.sample sieeve was labeled-with soil robe bo
<br /> .time,,date and sampler's'initials and then - . . . nng location; depth,
<br /> placed in a chilled colitainer.
<br /> Advanced GeuEnvjr r
<br /> - - '• . ', 7 anmental,Inc:: .
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