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TABLE 2 Soil Analytic Results for Vaults 7 and 8 - Diamond walnut Growers, Stockton, California Sample Sample Date Analytic Soluble Sole Soluble Total Total Total Total ID Depth sampled Lab Cr Cr Cu Na Ca so Cl (ft) <-----------------------------------------ppm-------------------------------------------> Vault 7-A 10 1 12/15/88" CEC 0 9 --- 0 6 38 -- 28 --- Vault 7-B 15 0 12/15/88 CEC 0 1 - 0 3 63 --- 45 --- Vault 7-C 10 6 12/15/88 CEC 0 53 ... 0 13 71 ... 38 --- Vault 7-D 15 0 12/15/88 CEC 0 39 --- 0.43 140 ... 640 --- Vault 8-A 10 5 12/15/88 CEC 5 9 4 Z 0 24 170 3,400 26 12,000 Vault 8-B 14 6 12/15/88 CEC 12 11 0 19 340 9,200 36 20,000 Vault 8-C 1D 5 12/16/88 CEC 16 6 5 0 2 340 9,600 15 20,000 Vault 8-D 14 9 12/16/88 CEC 9 9 7 0 0 3 380 8,100 <10 19,000 Vault 6 11 2 12/15/88 CEC 0 03 --- 0 38 220 78 970 200 (background) Vault 7 & 8 10 9 12/15/88 CEC 0 14 --- 0 67 150 130 12D 350 (background) Extraction Technique WET WET WET 3050 3050 DI DI I Analytic Technique 6010 7196 6010 6010 6010 375 4 325 3 OHS STLC 560 5 0 25 NE NE NE NE DHS TTLC 2,500 500 2,500 NE NE NE NE Abbreviations Extraction/Analytic Methods Cr+6 Chromium WET = California Administrative Code, Title 22, Waste Extraction Test Cr = Hexavalent Chromium 3050 = EPA Method 3050, Nitric Acid Digestion Cu = Copper DI = Deionized water dilution Na = Sodium 6010 = EPA Method 6010, inductively Coupled Argon Plasma (ICAP) Ca = Calcium 7196 = EPA Method 7196, Calorimetric rn S0 = Sulfate 375 4 = EPA Method 375 4, Turbidimetric y C14= Chloride 325 3 = EPA Method 325 4, Titrimetric STLC = DHS Soluble Threshold Limit Concentration m TTLC = DHS Total Threshold Limit Concentration = Not Analyzed NE = STLC and TTLC not established A <n = Not detected at detection limits of <n ppm