SR0079530 - Laserfiche WebLink

Home Browse Search

MONITORING AND REPORTING PROGRAM NO. R5-2008-0148 -3- LAWRENCE LIVERMORE NATIONAL SECURITY, LLC AND THE U.S. DEPARTMENT OF ENERGY FOR LAWRENCE LIVERMORE NATIONAL LABORATORY SITE 300 SAN JOAQUIN AND ALAMEDA COUNTIES Table 2. Sewage ponds groundwater analytes, analytical methods and reporting limits Analyte EPA (E) or Reporting Units Standard Method (SM)' limit Specific conductance E120.1 or calibrated field meter Not applicable mhos/cm H E150.1 or calibrated field meter ± 0.1 Unitless Total coliform SM 9211 2 MPN/100ml- Fecal coliform SM 9211 2 MPN/100mL Chloride E300.0 0.5 m /L Nitrate as NO3 E300.0, E354.1, or E353.2 0.5 m /L Sulfate E300.0 1 m /L Total Dissolved Solids TDS E160.1 1 m /L Sodium E200.7 11 m /L Metals E200.7 or E200.8 Variable m /L Ground water elevation Field measurement Not Feet or Meters applicable Or equivalent method as approved by the Regional Water Board. SEPTIC SYSTEMS GROUNDWATER MONITORING 7. Groundwater near or downgradient of the septic systems at Buildings 812, 834, 850, and 899 shall be sampled and analyzed semi-annually from the wells specified in Table 3 for nitrate as NO3, total and fecal coliform, and groundwater elevation. Table 4 lists the analytes, analytical methods and reporting limits. 8. Semi-annual sample collection shall be separated by at least 3 months and collected during periods that represent seasonally high and seasonally low ground water elevations. Table 3. Groundwater monitoring wells for Buildings 812, 834, 850 and 899 septic systems Septic system Downgradient monitoring Upgradient monitoring well wells Building 812 W-812-07 W-812-1929 W-812-09 Building 834 W-834-S1 W-834-D17 W-834-S4 Building 850 NC7-61 W-850-2416 NC7-10 Building 899 1 K6-23 K6-17 No monitoring wells exist directly downgradient of the septic system at B899. K6-23 is located within 50 feet of the septic system and has historically yielded samples with high nitrate concentrations.