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the water tank. The well access sheet, well inspection sheet, well sampling data sheet, and laboratory <br /> report are attached. <br /> Approximately 80 gallons of water was discharged from the sample point prior to collecting the <br /> groundwater sample. Before collecting the sample, the temperature, pH, and the conductivity of the <br /> groundwater were measured and recorded on the well sampling data sheet that precedes the <br /> laboratory results. After these parameters were measured, a sample was collected for laboratory <br /> analysis to identify whether volatile organic compounds(VOCs)may be present in the groundwater. The <br /> groundwater sample was collected in laboratory-supplied sample containers, filled completely, <br /> immediately capped, labeled, and placed in an ice-filled cooler. A completed chain-of-custody form <br /> identifying the sample identification, date and time collected, and the analyses to be performed <br /> accompanied the sample to BC Laboratories, a state of California certified laboratory located in <br /> Bakersfield,California. <br /> The laboratory reports attached to this letter show three values for each chemical compound that was <br /> analyzed:the method detection limit (MDL), the practical quantitation limit(PQL), and the result of the <br /> analysis. The MDL is the lowest concentration the laboratory can measure and the PQL is the lowest <br /> concentration that can be accurately quantified. A laboratory result of ND means the VOC was not <br /> detected at a concentration equal or greater than the MDL. A laboratory result followed by the letter <br /> "J" is a "trace"concentration that falls between the MDL and PQL. This value is an estimate. A reported <br /> result greater than the PQL is not qualified with a "J"and is an accurate value. <br /> The laboratory reports also include the results of internal laboratory quality control tests that are <br /> performed to verify the laboratory instruments are operating within the tolerances required by the <br /> analytical method and that the sample(s) being tested are not affected by laboratory contamination. <br /> Review of the quality control test results for the samples collected from your well in June 2017 shows <br /> that the laboratory equipment was operating within its specified tolerances and that the sample was not <br /> affected by laboratory contamination. <br /> RESULTS <br /> As shown on the attached laboratory report no VOCs were detected in the groundwater sample <br /> collected on June 22,2017. <br /> RECOMMENDATIONS <br /> Forward has been working cooperatively with the CVRWQCB on groundwater investigations in the area. <br /> In addition, the Landfill has been working with the Water Board to control and reduce any identified <br /> VOCs which include a variety of man-made chemicals commonly associated with certain kinds of <br /> household waste. Forward continues to proactively monitor and sample groundwater wells at a number <br /> of residential properties near the landfill. Based on the results, it is not recommended that your well be <br /> included in a semiannual monitoring program at this time. <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 /> M:\5017.1030\9852 Mariposa.docx 2 <br />