Laserfiche WebLink
07 January 2002. <br /> AGE-NC Project No, 98-04.40 <br /> Page 5 of 5' <br /> 1 <br /> borings B8 arid B9.are below the State of California maximum contaminant levels (MCLs) <br /> for drinking water. The vertical extent of impacted ground water has been defined. <br /> The highest concentration of-dissolved hydrocarbons quantified as TPH-g and.BTEX <br /> compounds extends northeast from USTs ns were: <br /> No. 4 and 5. Dissolved' hydrocarb les from <br /> encountered in the down-gradient direction from the former USTs in same <br /> monitoring wells MW2 and MWS. Dissolved hydrocarbon concentrations remained <br /> non-detectable in samples from wells MW 1,MW 3 and MW4,and concentrations decreased <br /> to non-detectable levels in the water sample collected from-well MW6. A map showing the <br /> approximate extent of dissolved TPH-g and benzene is presented in,Figure 5. <br /> • The lateral extent of petroleum hydrocarbon-impacted ground water has not been'defined' <br /> toward the north and northeast beyond MW5. The hydrocarbon plume is fairly well defined <br /> to the-'south, east, west and northwest. <br /> 5.0. RECOMMENDATIONS <br /> Based on the findings of this investigation,AGE recommends continued Quarterly monitoring of the <br /> •' xt It event should be performed in June 2002• <br /> ground water monitoring wells. The ne <br /> A work plan to install additional monitoring wells on and off-site has recently been approved by the <br /> San Joaquin County EHD. AGE anticipates an access agreement will be procured for'the off-site <br /> wells and the work will be performed during the second quarter 2002. <br /> 6.0. LIMITATIONS <br /> professional services were performed using that.degree of care and skill ordinarily exercised by <br /> Our <br /> . environmental consultants practicing in this or similar localities. The'findings were,.based upon. , <br /> ions <br /> analytical results provided by an independent laboratory.Evaluation ofthehyd'rogeool availabgic letd to <br /> Y <br /> at the site for the purpose of this investigation was made from a limited Wiae fro hese data,points.No ' <br /> points(ground water samples)and subsurface conditions may vary away <br /> her warranty, expressed or implied, is made-as to the professional interpretations, opinions and <br /> of Y <br /> recommendations contained in'this report; <br /> Advanced GeoEnviron mental,hic. <br />