1999-09-17_REVISION - M1999002 (3)

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Analytical Laboratory Parameters Constituent Units MDL' Standards Dissolved Nitrite as N (me/I) 0.01 I.0 mg/I Table I Human Health Standard Dissolved Phosphate (mg/I) 0.01 Dissolved Total (me/I) 0.01 Phosphorous Dissolved Potassium (mg/1) 0.3 Dissolved Selenium (mg/I) 0.0015 0.02 mg/I Table 3 Agricultural Standard Dissolved Silica (mg/I) 0.2 Dissolved Silver (mg/I) 0.0002 0.05 mg/I Table 1 Human Health Standazd Dissolved Sodium (me/I) 0.02 Dissolved Strontium (mg/I) 0.01 Dissolved Sulfate (me/I) 0.~ 250 mg/I Table 2 Secondary Drinking Water Standazd Dissolved Sulfide as (mg/!) 0.02 H,S Dissolved Thallium (mg/I) 0.00005 0.002 mg/I Tablel Human Health Standard Dissolved Uranium (mgil) 0.00005 Dissolved Vanadium (mg/I) 0.005 0.1 mg/I Table 3 Agricultural Standard Dissolved Zinc (mgil) 0.002 Gross Alpha Particle pCUI 2 15 pCi/I Table 1 Activity Human Health Standard Gross Beta Particle pCi/I a 4 tnrem/yeaz Table 1 Activity Human Health Standazd A1DC = blinimum Detection Limir Through consultation with CDMGand anEPA-approved groundwater testing laboratory, it has been determined that the "Minimum Detection Limir"(MDL) may be formulated through several different methods. Therefore, the following explanation is being provided to clarify the differences between the MDLs listed in Tables 2 and 3 and the MDLs anticipated in the laboratory analytical results. The MDLs in Tables 2 and 3 (WQl and WQ2, respectively) were generated during an MDL study designed to indicate the sensitivityof the laboratoryequipment while using a preferred EPA laboratory testing method. The MDLs in these tables represent detection limits that may be achieved using a known concentration of a single analyte in a clean matrix. Therefore, the detection limits provided in the tables are essentially instrument detection limits under ideal conditions and are not representative of the detection limits that would be