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I' <br />trace concentration of dichlorodifluoromethane was also measured in the confirmation sample. As <br />shown in the table below, all of the detected VOCs were below state and federal Maximum <br />Contaminant Levels (MCLS) for drinking water. Though not associated with the Forward Landfill, the <br />nitrate/nitrite results of 21 milligrams per (mg/L) exceeded the MCL of 10 mg/L. <br />Analyte <br />Units <br />Results <br />6/30/17 <br />Results <br />7/13/17 <br />MCL <br />Nitrate/Nitrite as Nitrogen <br />Mg/L <br />NA <br />21 <br />10 <br />Chloromethane <br />µg/L <br />0.28j <br />ND <br />NE <br />Dichlorodifluoromethane <br />µg/L <br />ND <br />0.23j <br />NE <br />Tetrachloroethene <br />µg/L <br />0.97 <br />0.59 <br />5 µg/L <br />Trichloroethene <br />µg/L <br />3.3 <br />1.9 <br />5 pg/L <br />Trichlorofluoromethane <br />µg/L <br />0.27j <br />ND <br />150 µg/L <br />Notes: j = Indicates an estimated value. <br />NE = No MCL established for this constituent. <br />ND = Not detected. <br />CONCLUSIONS AND RECOMMENDATIONS <br />The analytical results indicate that with the exception of nitrate/nitrite as nitrogen, the MCLs for <br />drinking water were not exceeded in the groundwater samples collected. MCLs are standards set by the <br />United States Environmental Protection Agency (EPA) and the State of California for drinking water <br />quality. An MCL is the legal threshold limit on the amount of a substance that is allowed in public water <br />systems under the Safe Drinking Water Act. The elevated nitrate/nitrite as nitrogen concentrations in <br />groundwater have been attributed to agricultural activities in the surrounding area. Out of an <br />abundance of caution, Forward has provided bottled water service for your residence and the tenant's <br />residence. Forward has also started the permitting to have both residences connected to municipal <br />water from the City of Stockton. It is recommended that the well be included in the semiannual <br />monitoring program. <br />CLOSURE <br />GLA and Forward thank you for participating in this sampling program. If you have any questions <br />regarding this information, please call Mr. Joseph Lipka at (209) 235-9622 at your convenience. <br />cc: William Lopez, Geo -Logic Associates <br />Victoria Warren, Republic Services <br />Brendan Kenny, CVRWQCB <br />Robert McClellon, San Joaquin Environmental Health Department <br />Enclosure: Figure 1— Property/Well Location Map <br />Analytical Results—BC Laboratories <br />Well Access Sheet <br />Well Sampling Data Sheets <br />M:\SO17.1030\7255 Newcastle.docx 3 <br />