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6E� GENESIS ENGINEERING&REDEVELOPMENT the following constituents. The analytical methods, Detection Limits, and Reporting Limits are indicated for each analysis. Reconnaissance Groundwater Sample Analyses Constituent Analysis Method Detection Limit Reporting Limit Bicarbonate Alkalinity SM2320B 5 mg/L 5 mg/L Calcium EPA 6010B 79 gg/L 100 gg/L Chloride EPA 300.0 0.0369 mg/L 0.5 mg/L Sodium EPA 6010B 120 gg/L 200 gg/L Potassium EPA 6010B 57 gg/L 100 gg/L Sodium EPA 200.7 12 gg/L 20 gg/L Sulfate EPA 300.0 0.025 mg/L 0.5 mg/L Total Dissolved Solids SM-4500-D 5 mg/L 15 mg/L Total Hardness SM-2340B 5 mg/L 5 mg/L Electrical conductivity("EC") Field analysis -- -- 3.2 Monitoring Well Sampling Prior to sampling, the depths to groundwater will be measured in all of the monitoring wells. Low-flow sampling techniques using a peristaltic pump will be utilized for sampling, if feasible. During purging, the discharge will be monitored for specific conductivity, temperature, and pH. Purging will continue until the parameters have stabilized as follows: Parameter Limits pH f 0.1 Standard Units Specific Conductance ± 10% Temperature f 1.0°Fahrenheit Field parameters will be recorded on field sampling data forms. Once the parameters have stabilized,the groundwater samples will be collected using a peristaltic pump set at a flow rate of less than 40 milliliters per minute. Each sample will be placed in laboratory supplied bottle and labeled. The sample bottles will be filled in the following order: (1) volatile organic compound ("VOC") sample, including total petroleum hydrocarbons as gasoline ("TPHg"), (2) total petroleum hydrocarbons as diesel ("TPHd") sample, (3) oil and grease, and (4) other constituents. The filled sample containers will be placed on ice. The VOC sample vials will contain a preservative supplied William DePaoli Property 7 of 15 Sampling and Analysis Plan June 2009