ARCHIVED REPORTS_REMEDIAL INVESTIGATION REPORT 2000

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• 3 SOIL ANALYTICAL RESULTS FOR METALS NORTH SHORE PARCELS STOCKTON DEPARTMENT OF HOUSING AND REDEVELOPMENT,STOCKTON,CALIFORNIA Results in milligrams per kilogram(mg/kg) Investigation Sample Sampling Sampling Sample Metals Area Number Date Location Depth At As Sb Ba Be Cd Cr Co Cu Pb H Mo Ni Se A Ti V Zn exCr 20 208-7-10.0 04/19/2000 7 10.0 - 2.2 - - - - - - - - - - - - - - - - - 208-7-6.0 04/192000 7 6.0 - 1.9 - - - - - - - - - - - - - - - - - 208 8 10.0 04/192000 8 10.0 - 4.9 - - - - - - - - - - - - - - - - - 208-8-3.0 04/192000 8 3.0 - 4.7 - - - - - - - - - - - - - - -20B-9-1.0 04/1912000 9 1.0 ff- 27 .8 - - - - - - - - - - - - - - - - - 208-9-10.0 04/192000 9 10.0 -208-9-3.0 04/192000 9 3.0 .2 - L<O.50 208-9-6.0 04/192000 9 6.0 21 218-1-1.0 0920/99 1 1.0 1,100 5.7 <20 130 <2.0 33 10 25 35 0.10 <3.0 38 <5.0 <2.0 <1.0 43 82 <0.1 21816.0 0920/99 1 6.0 2,100 6.6 <20 210 . <2.0 59 19 42 8.8 <0.1 <3.0 55 <5.0 <2.0 <7.0 81 70 - 21B-2-1.0 0920/99 2 1.0 8,200 23 <20 120 <0.50 <2.0 36 13 3,600 440 <0.1 <3.0 35 <5.0 <2.0 <7.0 60 260 <0.1 218-2-6.0 0920/99 2 6.0 20,000 4.4 <20 220 0.80 <2.0 58 17 42 8.7 <0.1 <3.0 56 <5.0 <2.0 <1.0 73 65 21 B-3-1.0 0920/99 3 1.0 23.000 3.7 <20 260 0.87 <2.0 63 18 38 6.6 <0.1 4.0 58 <5.0 <2.0 <1.0 73 BO <0.2 218-3-8.0 0920/99 3 6.0 18,000 6.3 <20 170 0.74 <2.0 50 .17 35 6.4 <0.1 <3.0 45 <5.0 <2.0 <1.0 68 60 - 21B�1.0 0920/99 4 1.0 22,000 3.4 <20 290 0.85 <2.0 62 17 37 7.8 <0.1 <3.0 52 <5.0 <2.0 <1.0 71 59 <0.2 218.4-8.0 0920/99 4 6.0 20,000 5.7 <20 160 0.82 <2.0 57 16 39 <2.0 <0.1 <3.0 49 <5.0 <2.0 <1.0 78 65 - 21B-5-1.0 0920/99 5 1.0 21,000 3.6 <20 170 0.89 <2.0 61 22 39 23 <0.1 c3.0 57 <5.0 <2.0 <1.0 73 57 <0.1 218-5-6.0 0920/99 5 6.0 19,000 4.1 <20 130 0.72 <2.0 58 12 34 6.8 <0.1 <3.0 42 <5.0 <2.0 <1.0 61.000 56.0 - 21 B-5-10.0 09/20/99 5 10.0 13,000 5.5 <20 120 0.57 <2.0 38 12 28 6.3 <0.1 <3.0 38 <5.0 <2.0 <1.0 54.000 45.0 - Regulatory Criteria Concentrations EPA Industrial PRG(Region 9) - 480 750 100,000 3,400 930 450 29,000 70,000 1,000 110' 9,400 37,000 9,400 9,400 130' 13,000 100,000 64 EPA Residential PRG(Region 9) - 21.0 30.0 5,200 150 9.0 210 3,300 2,800 130 5,51 370 150 370 370 5,21 520 22,000 '.00.0 Title Title 22 TTLC - 500 500 10,000 75 100 2,500 8,000 2,500 350 20 3,500 2,000 100 500 700 2,400 5,000 500 Title 22 STLC - 5.0 15.0 100 0.75 1.0 5.0 80.0 25 5 0.2 350 20.0 1.0 5.0 7.0 24.0 250.0 5.0 Notes: At=Aluminium;Ag=Silver;As=Arsenic;Be=Barium;Be=Beryllium;Cd=Cadmium;Co=Cobalt;Cr=Chromium;Cu=Copper;Hg=Mercury Mo=Molybdenum,Ni=Nickel,Pb=Lead;Sb=Antimony;Se=Selenium;TI=Thallium;V=Vanadium;Zn=Zinc --=Not analyzed or not applicable <0.01=Not detected at or above the indicated method reporting limit. 1=Methyl Mercury J+=Value is estimated with a high bias due to issues identified in the case rarrative or data validation reports. Analytical Method:SW6010 or 200.7,except in 1999: Ag 200.9,Hg 245.5,Se 200.9,Ti 200.9,HexCr 7196 Page 6 of 6 08/22/00 259770308.xls