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F a 4 0 - <br /> k <br /> BTEX.. Benzene; toluene,- ethylbentene, ` t6tal` xY,lenes <br /> PPM-- .•Parts. .p.er `mai 11on <br /> '- <br /> Parts. _ <br /> ' on- 1� ppm OPPb`' -ppb <br /> NoN..D-.-. detected-_­—_ <br /> detected_v -- . - <br /> N . <br /> A._ :.No `analysis . performed <br /> . <br /> SUMMARY OF OTHER-• ENVIRONMENTAL-'ACTIVI<TIES PERFORMED DURING <br /> 'THE pAST -QUARTER._.: <br /> _ - <br /> ri. <br /> Calculat-ion .of the �Direc.ti`on and'.Slope -of =Groundwater't,Flow <br /> "::Previously. .deterrnined well }head=elevations- .and=depth-i "to <br /> �n water. measurements obtained``-from moni'to.ri:ng"wel ls-'MW=1 ` <br /> lrfW 2, and MW-i on `March-:r31;°'1995_:were_,=used 'to calculate = - <br /> groundwater-_elevations�-.for _that, date Groundwater -contours `. <br /> w <br /> were.,-then drawn-by -interpolation of the.-groundwatery w <br /> eievati-onsk: A graph-ic= representatti.on �of 'these calculations. <br /> _ is presented ,.on= theaaraiisparericy. .overlvying the enclos-ed <br /> site-.map.. <br /> W .Y <br /> Table 2 <br /> .v. <br /> We11 -Head 'El evations,�,and;.Depth�to~.Groundwatei -at'.:-275'�Gr.ant <br /> ,.: _Line`'Road; Tracy, CA'--kir c' h.,S 1 , 1995 -_ <br /> a Well Head- "� Depth tou Relative `Groundwa er- <br /> Well _ _ El-evation* "=Groundwater. E-1evati.on5 <br /> Aumber ;{ft) ;; {ft } { ft} .. <br /> ------------------------------_------- --- ----- <br /> MW-1 6U. 51 - � N , 7 . 6.2_ 52 . 89 <br /> MW-2- 59 40 . 6. 66". `52-:74 <br /> _MW�-3 '. k60:05 :-.7 22, -„ 52 . 8-3 <br /> r_ ------------------------ ------------- <br /> e .v -- <br /> _ *We11-x,head" 1e 'aions "were: determined_-with -res.pectC"to ._an <br /> arbitrary"`datum established-at-.'the edge . of- :a`"c n6rete_ <br /> - footing -:for. .a bight standard.*located 'atttie southeast <br /> corn'e.r: • of `the -site . that '.,wa_s `des.ignated .'as having' an- <br /> = elevation of m,60 . 00 feet . F ` <br /> The hydraulic gradient (i ) may be .expressed by,- the" fa•rmula. rc- <br /> where '"h"-represents` the -dif-ferenceri -the: elevations <br /> _ of. the-two extr:eine groundwater . contours <br />