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Additional Groundwater Investigation Report <br /> CSUS Multi-Campus Regional Center <br /> August 19,2003 <br /> Page 8 <br /> Table 2 Direct Push Boring Groundwater Sample Analytical Results (Continued) <br /> [Benzene <br /> am ie Number 3024.CPT7-44 3024-CPT7-67 3024-CPT7-90 3024-CPT7-127 3024-CPT$-44 <br /> Sample Interval feet 40-44 63-67 86-90 123- 127. 40-44 <br /> nalyte Units-3 L <br /> <0.5 <0.5 <0.5 <0.5 1100 <br /> oluene <0.5 <0.5 <0.5 <0.5 1400 <br /> Eth lbenzene <0.5 <0.5 <0.5 <0.5 1800 <br /> Total Xylenes <1.0 <1.0 <1.0 <1.0 3500 <br /> TPH-G <50 <50 <50 <50 34000 <br /> TPH-D <50 <50 190 NR 8800* <br /> TPH-MO <500 <500 <500 NR <500 <br /> TPH-K <250 <250 <250 NR <250 <br /> MTBE <0.5 <0.5 <0.5 <0.5 <5.0 <br /> Ethanol <13 <13 <13 <13 <130 <br /> tert-Butanol <5.0 <5.0 <5.0 <5.0 <50 <br /> Di-isopropyl Ether <0,5 <0.5 <0.5 <0.5 <5.0 <br /> Ethyl tert-Butyl Ether <0.5 <0.5 <0.5 <0.5 <5.0 <br /> tert-Am I methyl Ether <0.5 <0.5 <0.5 <0.5 <5.0 <br /> 1,2-Dichloroethane <0.5 <0.5 1.2 <0.5 220 <br /> 1,2-Dibromoethane <0.5 <0.5 <0.5 <0.5 's <5.0 <br /> Sample Number 3024-CPT8-66 3024-CPT8-96 3024-CPT8-12$ 3024-GP10-44A 3024-GP10-44B <br /> Sample Interval feet 62-66 92-96 124-128 40-44 40-44 <br /> Analyte Units-* fL <br /> Benzene <10.0 <0.5 3.5 <0.5 <0.5 <br /> Toluene 230 4.2 15 <0.5 <0.5 <br /> Eth (benzene 65 1.4 7.6 <0.5 <0.5 <br /> Total Xylenes 400 8.1 42 <1.0 <1.0 <br /> TPH-G 2300 79 1300 <50 <50 <br />! TPH-D 390 100* 160 110* NR <br /> TPH-MO <500 <500 <500 <500 NR <br /> TPH-K <250 <250 <250 <250 NR <br /> MTBE <0.5 <0.5 <0.5 <0.5 <0.5 <br /> Ethanol <13 <13 <13 <13 <13 <br /> tert-Butanol <5.0 <5.0 <5.0 <5.0 <5.0 <br /> Di-isopropyl Ether <0,5 <0.5 <0.5 <0.5 <0.5. <br /> Ethyl tert-But 1 Ether <0.5 <0.5 <0,5 <0.5 <0.5 <br /> tert-Am l meth I Ether <0,5 <0.5 <0.5 <0.5 <0.5 <br /> 1,2-Dichloroethane 19 <0,5 <0.5 17 16 <br /> 1,2-Dibromoethane <0.5 <0.5 <0.5 <0.5 <0.5 <br /> h Unit Conversions: µg/L parts per billion(ppb <br /> Analytical <br /> k TPH-G�total petroleum hydrocarbons,quantified as gasoline. TPH•D=total petroleum hydrocarbons,quantified as diesel.'., <br /> TPH-MO=total petroleum hydrocarbons,quantified as motor oil. '=The sample chromatogram does not match the standard diesel chromatogram <br /> �Iw MTBE-methyl ter(-butyl ether TPH-K=total petroleum hydrocarbons,quantified as kerosene. <br /> NR=Not Analyzed due to Insufficient Sample Recovery <br /> 5.0 DISCUSSION AND RECOMMENDATIONS <br /> Five deep CPT boring pairs and one shallow direct borehole were completed across the site between April <br /> 14 and 17, 2003,to evaluate the vertical extent of groundwater contamination in the vicinity of the former . <br /> E USTs and at the anticipated cross- and down-gradient extents of the plume. CPT-4, CPT-5, and CPT-6 <br /> were advanced to depths of approximately 100 feet bgs; CPT-7 and CPT-8 were advanced to depths of <br /> f approximately 130 feet, and 135 feet bgs,respectively. A single direct push boring, GP=10, was advanced <br /> to a depth of 44 feet bgs to investigate the lateral extent of petroleum contamination in shallow <br /> groundwater down-gradient of CPT-5. <br /> 1 ; <br /> i~� CONDO <br />