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submitted to the laboratory. The soil sampling equipment will be cleansed between each sampling by washing the equipment with an Alconox°solution followed by a double rinse with deionized water. The rinseate water will be discharged to ground surface areas within the Caltrans right of way which do not slope to drainage inlets or surface water bodies. • The fieldwork will be performed under the direct supervision of Geocon's field supervisor and/or project manager. Laboratory Analyses The soil samples will be analyzed under a standard ten-day tum-around-time for the following: • Each of the soil samples collected from the median and shoulders of Route 99 will be homogenized by the laboratory and analyzed for total lead using Environmental Protection Agency (EPA)Test Method 6010B. • Soil samples containing total lead concentrations greater than 50 mg/kg will be analyzed for soluble lead using the WET method, EPA Test Method 7000. Soil samples with total lead concentrations greater than 1,000 mg/kg will be analyzed for toxicity characteristic leaching procedure(TCLP). • Soil samples analyzed by the WET method containing soluble lead concentrations greater than 5.0 milligrams per liter (mg/1) will further be analyzed for soluble lead following the WET method utilizing deionized water as the extractant(DI-WET). • Ten percent of the soil samples will be analyzed for soil pH using EPA Test Method 9045. • Each of the asbestos samples will be analyzed for asbestos type and content using polarized light microscopy and phased contrast microscopy. • Each of the LCP samples, as well as the soil samples collected from the hand-auger borings adjacent to the bridges, will be analyzed for Title 22 metals following EPA Test Method 6010B. QA/QC procedures will be performed for each method of analysis with specificity for each analyte listed in the test method's QA/QC. QA/QC measures will include the following: • One method blank for every ten samples, batch of samples or type of matrix, whichever is more frequent. • One sample analyzed in duplicate for every ten samples, batch of samples or type of matrix, whichever is more frequent. • One spiked sample for every ten samples, batch of samples or type of matrix, whichever is more frequent, with spike made•at ten times the detection limit or at the analyte level. Project No.S8475-06-27 -4- April 3,2002