Laserfiche WebLink
m <br /> F.r <br /> a <br /> R <br /> f <br /> These plots <br /> distribution of give a general representation +, <br /> relative to hydrocarbon impacted soils: beneath he the <br /> small areal the excavated area, <br /> extent of soils with figure 9 :shows a relatively <br /> The pattern of the contours suggest TP <br /> HG le'.=als <br /> either the northeast end of the midle stank above 5 Ppm. <br /> a line servin g n=sociated with <br /> all soils with the <br /> northern <br /> concentrati ns above or more likely <br /> removed. The figure indicates <br /> 5 Ppm have been <br /> Figure 10 shows a <br /> impacted arbon- <br /> soils in larger areal extent of <br /> f reflects natural radial zone <br /> e from 22-33 feet. his probably <br /> Of re the plume, g durin This probably <br /> soils with TPHG As Figure g 9 vertical movement <br /> Zs above 5 this Plot indicates all <br /> excavation, ppm have been <br /> i ' removed by <br /> FloThe areal extent of hydrocarbon Impacted <br /> is similar to <br /> 1..i the the interval 22-33 feet with the below 33 feet <br /> zone around well MW5. This exception of <br /> spreading pattern departure fram <br /> Plume had erc ,, Probably indicates the dowrnaard moving <br /> controlled b ountered the groundwater table and movement was <br /> y fluid flow. This is <br /> that M�tiS is the only well showin Consistent <br /> with the fact <br /> 9 free product. <br /> The three plots indicate all <br /> concentrations less than 5 soils with hydrocarbon <br /> the historic water table. PPM have been. removed <br /> benzene above Similarlyto below <br /> method detection limit ' n° Soils containing <br /> IA. 33 feet below grade. its remain <br /> than <br /> PPM) and xylene (0.08 Very minor levels of toluenes (Op4 <br /> outside of the ppm) were recorded in o:ie <br /> feet. Present excavation. soil boring <br /> $' in the interval 23-24 <br /> Although some soil contamination still exists di <br /> _j the former tank area directly below <br /> level. WaterWorkit is below the Seasonal h3 <br /> hydrocarbons below proposes eet to <br /> as high water <br /> ad.ires3 any residual soil <br /> contamination problem. part of the groundwater <br /> 3.2 Groundwater <br /> contamination <br /> LJ <br /> In Order to further assess <br /> site. WaterWork groundwat;sr contamination at the <br /> additional soil boring��ses 'to dr4.1,l log, and <br /> then be across Pacific Avenue sample one <br /> converted into a which will <br /> The Proposed monitorin groundwater monitoring well <br /> Figure 12, g well construction detail is shownoni <br /> The well will be <br /> the prima located immediately down <br /> is primary source gradient of both <br /> boring/well- <br /> location <br /> to contain a fz are, and well <br /> five (MW5) which <br /> g/well location is P?:oduct. The <br /> shown <br /> on <br /> Fid=ure 2. This PvOp°sed <br /> upon the mast recent <br /> the east-southeast g�adient ,.data which indicated flaw based <br /> . <br /> (Figure 3 <br /> )wThe well will be installed on <br /> 4 <br />