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Monitoring Report Compliance Chec ist <br /> ' Discharges Regulated by Title 27 and/or Part 258 5 <br /> Constituent(µg/L) MW-1 MW-2 MW-3 Comment <br /> _(upgradient <br /> 1,1,2-Trichloro-1,2,2- 0.9 BL 0.8 BL Not noted in text, table, and/or graphs <br /> Trifluoroethane <br /> Dichloromethane 17.7 BL 12.7 BL Not noted in text, table, and/or graphs <br /> Chloroform 1.9 BL 1 1.4 BL Not noted in text, table, and/or graphs <br /> BL =Basic Laboratory Seq=Sequoia Laboratory <br /> - MW-1 has been impacted by COCs and should not represent upgradient conditions for VOCs. Because of <br /> the MTBE hits in MW-1, we recommend the person sampling the well ensure that the truck is downwind <br /> from the wellhead at all times and the sampling equipment be upwind(i.e., unload the bottles and coolers <br /> from the truck before sampling). We are also aware that laboratories pick up MTBE in their analysis if a <br /> parking lot is adjacent to the ventilation system of the laboratory. Please check into these two potential <br /> contaminant pathways for MTBE. <br /> - Increasing trend of chloride in all wells. MW-3 exceeded Concentration Limit (CL). <br /> - CLs seem to be high in surface water in Table 2. Please explain what data was used, when the CLs were <br /> developed, and whether they are current. <br /> - Statistical outliers must not be deleted from the Time Series Graphs unless there is a full explanation for <br /> deleting them from the record. Note that TDS at 360 mg/L in MW-1 was plotted in the 3rd Quarter 2002 <br /> report, but taken out of the 4th Quarter/Annual Time Series graphs. There is no discussion in the text that <br /> supports the deletion of the 360 mg/L TDS result for MW-1. It must be proven that it is an outlier by <br /> resampling, but this was not done. <br /> - The annual report states that only two VOCs were detected at MW-3 during 2002. This is an incorrect <br /> statement based on the laboratory sheets. Please review the laboratory sheets for 2002 and update the <br /> specific Tables in monitoring reports, Historical Tabulated Summary, and Time Series Graphs. Submit <br /> corrected text, tables and graphs in a revised addendum to the 2002 Annual Report by 15 October 2003. <br /> - Sampling and Analysis Plan figures still incorrectly quoted. Most County Landfill monitoring reports had <br /> same errors. Please either change your figure numbers or change the written documents in Appendix A. <br /> - Report was received after due date by-3 months. <br /> RWQCB Staff Signature: -4� 1 ', <br /> Date: k( wc <br />