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REPORT REPORT MAXIMUM CONCENTRATION RECOMMEN. . CLEAN-UP- MCL/ RECOMMENDED CLEAN-UP DATE TITLE, ENCOUNTERED - DED LEAD GOALS SMCL GOALS FOR THIS SITE KLEINFELDER 'AGENCY (SOIL) -(DRINKING FILE NUMBER WATER) AND SITE DESCRIPTION 2/24/97 "Limited Phase II Proposed Residential Area Proposed Proposed Prop.Residential Proposed Residential Area Soil and (Borings 5-5 and 5-6): Residential Residential Area Area(Borings 5- (Borings 5-5 and 5-6): Borings 53 and 5 and 5.6): barium(soil)=5,300 mg/kg Groundwater Ba=120 mg/kg in soil Area 566: barium(water): Assessment, Cr=8.6 mg/kg in soil Borings 5-5 barium(soil): PRG-tw=2.6 total chromium(soil)=210 mg/kg Septic Cc=9.8 mg/kg in soil and 5-6): TTLC=10,000 mg/L,CA-MCL= cobalt(soil)=4,600 mg/kg Systems...." Cu= 18 mg/kg in soil PHS/EHD mg/kg, STLC= 1.0 mg/L, copper(soil)=2,800 mg/kg • 100mg/L, PRG-i USEPA-MCL= (File 20-3978- (nc)=100,000 2.0 mgt barium(water)=2.0 mg(L Oi.WRS) Ba=0.34 mg(L in groundwater mg/kg,PRG-r(nc) chromium(water)=0.050 mg/L Cr=0.0078 mg(L in groundwater =5300 mg/kg chromium(water): vanadium(water)=0.260 mg/L Borings 5-5 and Mo=0.034 mg(L in groundwater CA-MCL=0.050 Zinc(water)=2.0 mg/L total chromium mg(L,USEPA- 5-6 were all Ni=0.026 mg(L in groundwater (soil):PRG-r(ca) MCL=0.1 mg/L, advanced in the V=0.029 mg/L in groundwater =210 mg/kg, PRG-tw(nc)_ old"cottage area" Zn=0 028 mg(L in groundwater PRG-i(ca)=450 0.180 mg/L(PRG just off Yosemite mg/kg,TTLC= is for Ct') 2500 mg/kg,and Boulevard. This STLC=5 mg/L molybdenum I' area is planned (water):PRG-tw for residential cobalt(soil): (nc)=0.18 mg/L use. PRG-r(nc)= USEPA-IRIS= 4,600 mg/kg, 0.035 mg/L, PRG-i(nc)= USEPA-SNARL= 97,000,TTLC= 0.040,no CA or 8,000 mg/kg and USEPA MCLS or STLC=80 mg/L SMCLs • copper(soil): vanadium(water): TTLC=2,500 PRG-tw(nc)_ mg/kg, STLC= 0.260 mg/I., 25 mg/L, PRG-r USEPA IRIS (nc)=2,800 0.049 mg/L mg/kg,PRG-i(nc) =63,000 mg/kg zinc(water)PRG- tw(nc)=11 mg/L,CASMCL =5.0 mg/L, USEPA-SNARL= 2.0 mg/L 20-3978-O1.W35/2017L308 Page No.42 of 66 C 1997,Kleinfelder,Inc. August 8, 1997