Laserfiche WebLink
Metadata
Document management portal powered by Laserfiche WebLink 9 © 1998-2015 Laserfiche. All rights reserved.
i <br /> Second Quarter 2006 Groundwater Monitoring Report <br /> . Flag City New West#1003,6437 West Banner Street,Lodi,California <br /> Page 4 <br /> ANALYSIS PERFORMED: <br /> Analysis Abbreviation Designation I USEPA Method No <br /> Total Petroleum Hydrocarbons TPN Gas Range 8015M <br /> as Gasoline g Hydro—carbons] <br /> Benzene <br /> Toluene BTEX Aromatic Volatile <br /> Eth (benzene Organics <br /> Xylenes (Total) <br /> Tertiary Butyl Alcohol TBA 8260B <br /> —Methyl Tertiary Butyl Ether MTBE <br /> Di-isopropyl Ether DIPE <br /> Ethyl Tertiary Butyl Ether ETSE Fuel Oxygenates <br /> Tertiary Amyl Methyl Ether TAME <br /> Ethanol Ethanol <br /> Methanol Methanol 8015M <br /> Modifications from Standard Monitoring Program: <br /> Despite contacting Flag City Chevron several times, Apex was unable to obtain second quarter <br /> groundwater gauging and sampling data for that site First quarter 2006 Flag City Chevron <br /> sampling data was used to construct groundwater isoconcentration maps <br /> i <br /> • INTERIM REMEDIATION ACTION <br /> Weekly batch extraction as an interim remediation action began on April 4, 2006 To date, 27 93 <br /> pounds of MTBE have been removed Results are presented in Table 4 <br /> CONCLUSIONS <br /> Based on groundwater analytical results, MTBE is the constituent of concern in Zones A and B <br /> MTBE was detected in all Zone A wells except MW-1 and MW-5A In Zone B, wells MW-3B, <br /> MW-4B and MW-6B contained concentrations of MTBE All other analyzed constituents were <br /> below detection limits <br /> RECOMMENDATIONS <br /> Apex recommends continued quarter groundwater monitoring The next scheduled sampling <br /> event is September 2006 and will include the seven new wells proposed in the report titled <br /> Workplan far Monitoring Well Installations <br /> ADDITIONAL ACTIVITIES PERFORMED AT SITE <br /> • None <br />