ARCHIVED REPORTS_SITE CHARACTERIZATION REPORT 1999

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TABLE 1 SOIL ANALYTICAL RESULTS PETROLEUM HYDROCARBONS AND VOLATILE ORGANIC COMPOUNDS SOUTH SHORE PARCELS STOCKTON DEPARTMENT OF HOUSING AND REDEVELOPMENT STOCKTON,CALIFORNIA Results in micrograms.per kilogram(ug/kg) except where noted Investigation Sample Sampling Boring Sample TPH TPH TPH Benzene Toluene Ethyl- Total MTBE VOCs Area Number Date Number Depth as Gasoline as Diesel as Motor Oil benzene Xylenes 1,2,4- (feet) 2 4- (teet) (mg/kg) (mg/kg) (mg/kg) PCE Naphthalene Isopropylbenzene n-propyl Trimethyl sec-butyl n-butyl benzene benzene benzene benzene Analytical Method 8015M or 8020 8020 or 82606 8010 82606 Reporting Limit 50 50 50 50 50 2ATP-4-1.0 9115/99 4 1.0 <1.0 <10 - <5.0 <5.0 <5.0 12.0 <5.0 -- -- -- -- -- -- -- 2ATP-4-6.0 9115/99 4 6.0 85 68 `- <250 630 380 800 <250 <50 <100 87 194 _ <50 62 144 2ATP-4-10.0 9/15/99 4 10.0 250 I,200 <300 940 <300 2500 <300 _ 2ATP-5-1.0 9/15/99 _ 5 1.0 <1.0 <101 - <5.0 <5.0 <5.0 <5.0 <5.0 -- -- -- -- -- - -- 2ATP-5-6.0 9/15/99 5 6^0 1,100, 8,800} " <500 2,100 <SOD 10,000 <500 <400 <800 784 1,420 416 680 1,580 2ATP-5-10.0 9/15/99 5 10.0 1,100, 8,3003 <350 1,600 <350 9,100 <350 2A 2AB-1-1.0 9117/99 1 1.0 <1.0 <101 - <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <10 <5.0 <5.0 <5.0 <5.0 <5.0 2AB-1-6.0 9/17199 1 6.0 <1.0" <10 -- <5.0 <5.0 <5.0 <5.0 <5.0 -- -- -- -- -- 2AB-1-10.0 9/17/99 1 10.0 <1.0 <10 -- <5.0 <5.0 <5.0 <5.0 <5.0 -- -- -- - -- 2AB-2-1.0 9/17/99 2 1.0 <1.0 <10 -- <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <10 -<5.0 <5.0 - <5.0- <5.0 <5.0 2AB-2-6.0 9/17199 2 6.0 <1.0 <t0 <5.0 <5.0 <5.0 <5.0 <5.0 -- -- -- -- -- -- -- <5.0 <5.0 <5.0 <5.0 <5.0 -- -- -- -- -- 2AB-2-10.0 9117199 2 10.0 <1.0 <]0 -- -- 2AB-3-1.0 9/17/99 3 1.0 <1.0 <10 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <10 <5.0 <5.0 <5.0 <5.0 <5.0 - 2AB-3-6.0 9/17/99 3 6.0 <1.0 <10 <5.0 <5.0 <5.0 <5.0 <5.0 -- -- -- -- -- -- 2AB-3-10.0 9117/99 3 10.0 <1-0 <10 - <5.0 <5.0 <5.0 <5.0 <5.0 - - - -- - 2AB-4-13.0 9/17/99 4 13.0 <1.0 <10 -- <5.0 <5.0 <5.0 <5.0 <5.0 -- -- - 2AB-4-19.0 9117199 4 19.0 <Lo <10 -- <5.0 <5.0 <5.0 <5.0 <5.0 - - - -- 2AB-4-25.0 - 9117/99 4 25.0 <1.0 <10 <5.0 <5-0 <5.0 <5.0 <5.0 _ 2AB-4-43.0 9117/99 4 43.0 <1.0 <10 -- <5.0 <5.0 <5.0 <5.0 <5.0 - -- -- -- _- 2AB-4-46.0 9/17/99 4 46.0 <1.0 <10 - <5.0 <5.0 <5.0 <5.0 <5.0 -- -- -- -- -- Average NC NC NC 3336.5 14377.4 5761.6 27767.7 ND 8.8 1608.9 -798.4 203.6 57.0 94.6 217.4 Maximum NC NC NC 110000.0 460000.0 150000.0 690000.0 ND _ - 200.0 14000.0 0300.0----- 1420.0 416.0 680.0 1580.0- -_- Minimum NC NC NC _ <5.0 <5.0 <5.0 <5.0 ND <5.0 <10.0 <10.0 <5.0 <5.0 <5.0 <5.0 Std.Dev. NC NC NC 15970.9 70188.9 24169.0 115451.1 ND 31.3 4648.5 2078.9 496.0 145.3 237.4 552.8 - ^- -- - Count - vvNC --NC - NC 89.0 89.0 89.0 89.0 ND 40.0 9.0 -9.00yu -8.0 8.0 8.0 8.0 _ t-value NC NC NC 1.645 1.645 1.645 1.645 ND 1.685 1.860 1.860 €.895 1.895 1.895 1.895 - 95%UCL. NC NC NC 6121.3 26616.2 9975.9 47898.8 ND 17.2 4490.9 2087.4 536.0 154.3 253.7 587.7 2B 21313-1-1.0 9/17199 1 1.0 <1.0 <10 -- <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <10 <5.0 <5.0 <5.0 <5.0 <5.0 - 21313-1-6.0 9/17/99 1 6.0 <1.0 <t0 <5.0 <5.0 <5.0 <5.0 <5.0 -- -- -- -- -- -- 2BB-1-10.0 9117199 1 10.0 T - <1.0 <10 <5.0 <5.0 <5.0_ <5.0 <5.0 -- -- :- -- -- - - 2BB-2-1.0 9/17/99 2 1.0 <1.0 <10 <5.0 <5.0 <5.0 <5.0- <5.0 -^--<5.0 <10 x_5.0 _<5.0 -- <5.0 <5.0 < : . 21313-2-6.0 9117/99 2 6.0 <1.0 <10 <5.0 <5.0 <5.0 <5.0 <5.0 2BB-2-10.0 9/17/99 2 10.0 <1.0 <10 <5.0 <5.0 <5.0 <5.0 <5.0 -- -- -- -- -- 2BB-3-1.0 9117/99 3 1.0 <1.0 <101 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <10 <5.0 <5.0 <5.0 <5.0 <5.0 -- <5.0 <5.0 <5.0 <5.0 <5.0 213B-3-6.0.0 9117!99 3 6.0 <1.0 <10 -- -- -- -- -- 2BB-3-10.0 9117/99 3 10.0 <1.0 <10 - <5.0 <50 <5.0 <5.0 <5.0 -- - 213TP-1-1.0 1 9/15199 1 l 1 1.0 1 <1.0 <10 - <5.0 <5.0 <5.0 <5.0 <5.01 1 1 1 -- - Page 3 of 5 12/10/99 SOMA 99-2218 DRAIT s