Laserfiche WebLink
4-2 <br /> "1 <br /> Table 4--1. Analytical Results: Soil Samples <br /> Concentrations, milligrams per kilogram <br /> EPA EPA <br /> EPA Method 8020 Method 8015 Method 8010 <br />{' Total fuel <br /> Well number Benzene Toluene Xylene hydrocarbons Solvents <br /> Designated levela 0.7 100 620 -b - <br /> ATR-lA (10.0-10.5 ft) 0.04 0.05 0.07 <10 NDc <br /> ATR-2A (6.0-6.5 ft) <0.01 <0.01 <0.01 <10 ND <br />(� ATFL-23 (10.0-10.5 ft) 0.27 1.3 <0.01 710 ND <br /> ATR-3A (5.5-6.0 ft) 0.05 0.01 0.03 <10 ND <br /> ATR-3B (10.0-10.5 ft) 0.15 0.86 3.7 1,300 ND <br /> ATR-4A (5.0-5.5 ft) 0.33 0.01 0.05 <10 ND <br /> ATR-4B (10.5-11.0 ft) 2.2 2.5 7.8 1,700 ND <br /> aDesxgnated level in a solid for the protection of groundwater quality <br /> ' <br /> recommended by the Regional Board, September 1986. <br /> bNo standard is established for total fuel hydrocarbons. <br /> (:TIondetectable constituents. <br /> Table 4-2. Analytical Results: Groundwater Samples <br /> x � <br /> Concentrations, micrograms per liter <br /> Item Action level ATR-1 ATR--2 ATR-3 ATR-4 <br />' EPA Method 602 <br /> Benzene 0.7a <0.5 <0.5 2,300 3,000 <br /> Toluene 100a <0.5 0.6 180 200 <br /> Xylene 620a 23 <0.5 2,300 950 <br /> Lead 0.05b 0.024c 0.18c 0.10c 0.040c <br />' EPA Method 8015 <br /> Total petroleum fuel <br /> hydrocarbons <1.0c <1.0c 17c 21c <br /> EPA Method 601 <br /> } 1,2--Dichloroethane 5e 1.6 5.9 20 <10 <br /> 1,4-Dichlorobenzene 750e 0.5 <0.5 <0.5 <10 <br /> Bronlodichloromethane 100e 2.3 <0.5 <0.5 <10 <br />' Chloroform 100e 5.0 <0.5 <5.0 <10 <br /> aDrinking water action levels recommended by DHS, January 1987. <br />' bRegional Board primary drinking water standard (MCL) for lead, <br /> 0.05 milligrams/liter, September 1986. <br /> cResults in milligrams/liter. <br /> dNo standard established for total fuel hydrocarbons. <br /> eRegional Board primary drinking water standard (MCL) , September 1986. <br />�' BROWN AND CALDWELL g CONSULTING SNGINEERS <br />