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f � _ filled mud e Problem As Canepa's Car racks sessment Repast an Wash(Pacific Auenue) from reddish to and carbonate nodules Corrective frarn Yelk)W-brow Action Plan are abundant in the silt se beneath the for n across hast of page� site;how mer site of the he site, and quence. The color of ever, it thins to the SSTs ad a!, gray to blue the silt r rrorthest where Sand becomes The silt sequence is gray in same saran lges Below approximate? becomes Present beneatlof tale P more abundant much lenses of c1a Y 60 feet, sands of the deposilt are sited by aggr dings earns set t are More depth of dr"t and apparently Grou eeping back an ling (!10 feet)- more continuous. ndwater d forth across �• The dee Interbedded feet, beneath the s the dicta! per sands like? The overall t site is unconfined Portion of the alluvia} Zany were sixties. From rend f°r the and the depth to the m i 994 to water table elevation Since second was do w water table in June S quarter 2Q00, Quarter 2000, the trend was nward fro of 2002 w about 2 feet. A h the trend for the upward m I9S0 to at least the as about 3S Figure 6, The Ydrograph of the available �, t,, ,, ph has With a rise of about 20 middle of the groundwater gradient is eastward ter level data been relatively flat with feet at the 5.5 c n/day our a seasonal ran site. at approxi all r"onitor wells on site is ed in mately 0.003 with an estimated flaw 'SHF carried out presented in aquifer. MW_ a 24-hour p velocity of results i 1 was Pum e p test in 1994 in an p P d and MSV- 4 to estimate the permeabilit ptrmurn pumpin ' ' 6' '7, and -8 w hydraulic properties Y was estimated at g rate of 5 were used as observation wells.f the unto lfinld 126 gPdl1}z gprn with an effective radiusysis of the 5.0 bxST of about 144 nal RiBUT'I0�1 O�SOIL AND GRp feet. Aquifer The twenty foot rise resulted n of the elevation ND W 1994. saturation of Most of the coOf ma the water table TER CQNTAM�NATION (he mrnated between !994 and 199-5 the ' M W- water 2, M W-6' and M W_ soil identi flcd in the soil second table has been 7) and in soil boring bo quarter 2000 has and, at present, the de above the to g S$-I installed gs installed b Condor installed depth of Fater in tlje P of the well screens a� by Condor in y WHF to table to three additional soil v monitor w 1998- Since earl assure monitor wells Par extraction wells is a ells BIW 1 installed more representative (MW-9 pproxi through Mr,V-g at the same time to investigate sour ' MW-10, and MW_1 mately 20 feet. In 2001, nvestigate the potential vertical extent A dee ) screened at The distribution p monitor well the water Grourrdw of soil contamination of the coma (Mt -12d) was ater quality data are and soil remedial in Section S dial actions are 5.1 DISIR[BiT summarized in Subsection TIQ�C3.F S S I Analytical data far SOIL CONTAMINATION in the Samples collected fro hydrocarbons. distribution of soil coma m soil Barin The soil xninatian in the gs and borings for resulting from the release °ring and subsurface resulting monitor Leet Mon well locatio we11s were beneath the was detected in ns are g from the release of used to contatninatiar� in towner samples collected fro shown in Fi Petroleum location of the g° 2. Soil is show Plan view is shown uS t s and Pipin m depths ranging frarrx c'�ntam'nation n in Figure 8(Originally an Fi g to the about 35 Y Figure gore 7 The distribution dist'ci,se�s. Tlie �- feet to SS In 1998 ' WHF, 1994) of sail contamination in cross and tile and 2001, Condor installed Contaminated soil sail n (figure 2 was found in samplesBarings to further Investigate the dis }' at dcPths extendin frorn borin the cite Petrser island to the g fratn 25 feet to 7 g SB-1, located extent t contaminate west, coma 0 feet. Ire soil boring adjacent to d soil. urination was found in g SB-2, located the dispenser island samples from de on the opposite side of depths of 26 feet to 70 feet Sal CONDO