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Revised Monitoring and K .,)rting Program No. 93-100 4 <br /> Lawrence Livermore National Laboratory Site 300— Pit 1 <br /> San Joaquin County <br /> constituents of concern, their concentration limits, and their statistical limits for <br /> single measurements are listed in Tables 2 through 4. <br /> 12. Because background concentrations vary across the site, site-wide mean <br /> concentrations have not been used in detection monitoring as a basis for <br /> comparisons against individual well concentrations of constituents of concern. <br /> The concentration limits shown in Tables 2 through 4 reflect the mean of <br /> historical concentrations in each well. Concentration limits are used to <br /> calculate statistical limits. Statistical limits were calculated only for <br /> downgradient and cross-gradient detection monitoring wells. <br /> 13. As shown in Table 4, the Discharger will use trend analyses to evaluate tritium <br /> and perchlorate concentrations in evaluation monitoring wells. <br /> Table 1: Pit 1 Groundwater monitoring analytical methods, reporting limits, <br /> frequency, and applicable monitoring network. <br /> Monitoring Applicable <br /> EPA (E) or Standard Reporting Frequency monitoring <br /> Anal to Method SM)' Limit all wells network <br /> Metals ( /L) <br /> Arsenic E200.8 2 Quarterly Detection <br /> Baruim E200.7 or E200.8 25 Quarterly Detection <br /> Beryllium E200.8 or SM3113B 0.5 Quarterly Detection <br /> Cadmium E200.8 or SM3113B 0.5 Quarterly Detection <br /> Cobalt E200.7 or E200.8 25 Quarterly Detection <br /> Copper E220.2 or E200.8 10 Quarterly Detection <br /> Lead E239.2 or E200.8 2 Quarterly Detection <br /> Nickel E249.2 or E200.8 5 Quarterly Detection <br /> Vanadium E200.7 or E200.8 25 Quarterly Detection <br /> Zinc E200.7 or E200.8 20 Quarterly Detection <br /> Salts/anions /L) <br /> Perchlorate E314 4 Quarterly Detection & <br /> Evaluation <br /> Energetic Materials ( /L <br /> _HMX E8330 1 Quarterly Detection <br /> RDX E8330 1 Quarterly Detection <br /> Radioisotopes pCi/L <br /> Radium E903 or E904 1 Quarterly Detection <br /> Tritium E906 100 Quarterly Detection & <br /> Evaluation <br /> Thorium-228 CP-900 0.24 Quarterly Detection <br /> Thorium-232 CP-900 0.162 Quarterly _ Detection <br /> Uranium E908 3 Quarterly Detection <br /> Or equivalent method as approved by the Central Valley Water Board <br /> 2alpha spectroscopy analytical method <br />