|
Amery Environmental Assessment Report
<br /> Pittman Elementary School,Stockton,CA
<br /> December 10,2003
<br /> Page 19
<br /> • 7.5 NORTHERN FORMER UNDERGROUND STORAGE TANKS SITE RESULTS
<br /> The VOCs MC, benzene, trichloroethene (TCE), toluene, ethyl benzene, m,p-xylene, o-xylene, 1,3,5-
<br /> trimethylbenzene, 1,2,4-trimethylbenzene, 1,3-butadiene, hexane, cyclohexane, heptane, propylbenzene,
<br /> acetone, carbon disulfide, MEK, 4-ethyltoluene, ethanol, and.methyl tertiary-butyl ether (MTBE) were
<br /> detected in the soil gas samples. A summary of detected VOCs in the soil gas samples is presented in
<br /> Table 14, below. Laboratory report sheets indicating analytical methods used, detection limits, and the
<br /> results of the analyses are included in Appendix B. Selected analytical results are indicated on Figure 12,
<br /> Appendix A.
<br /> Table 14-Laboratory Anal tical Results Northern UST Site -Soil Gas
<br /> Sample ID: J638F-VBI-]0 3638F.VBIA9 J638F-VB2-10 3638F-VB2-20 3638F.VB3-10 3638F-VB3-20 3638F-VB4-10 3638F-VB4-20
<br /> Date: 08/11/2003 08/11/2003 08/11/2003 08/128003 08/17/2003 08/13/2003 08/12/2003 08/12/2003
<br /> Reporting
<br /> Constituent Limit Units
<br /> Ran e
<br /> Methylene Chloride 0.68-3.6 ppbv0.82 1.1 2.6 0.84 18 14 3.8
<br /> Benzene 0.68-3.6 ppbv3.8 1.7 <0.76 1.7 1.4 16 <0.78
<br /> Trichloroethene 0.68-3.6 ppbv <0.74 <0.76 0.87 0.78 1.1 <3.6 <0.78
<br /> Toluene 0.68-3.6 ppbv25 9.4 5.4 8.7 5.4 32 1.2
<br /> Eth 1 Benzene 0.68-3.6 ppbv4.6 2.0 3.5 2.0 1.6 5.0 <0.78
<br /> m, -X lene 0.68-3.6 ppbv22 9.5 I S 7.8 6.2 18 0.94
<br /> o-X lene 0.68-J.6 ppbv7.2 3.0 7.0 2.6 2.3 6.4 <0.78
<br /> 1,3,5-Trimeth (benzene 0.68-3.6 p by 1.0112.1 1.1 3.3 0.77 <0.73 <3.6 <0.78
<br /> ...1,2,4-Trimeth ]benzene 0.68-3b ppbv 4.0 8.2 4.6 11 3.6 2.4 4.3 <0.78
<br /> 1,3-Butadiene 0.68-3.6 ppbv 1.7 15 3.4 3.6 2.6 4.4 28 <0.78
<br /> Hexane 0.68-3.6 ppbv 1.4 8.9 1.7 0.77 2.6 2.8 11 <0.78
<br /> C clohexane 0.68-3.6 ppbv 2.2 12 4.1 <0.76 <0.73 <0.73 <3.6 <0.78
<br /> He tape 0.68-3.6 ppbv 1.6 5.4 1.9 <0.76 1.9 1.6 7.8 <0.78
<br /> Pro (benzene 0.68-3.6 ppbv <0.78 1.1 <0.76 2.3 <0.73 <0.73 <16 <0.78
<br /> Acetone 2.9- 15 ppbv 16 37 37 57 28 29 200 18
<br /> Carbon Disulfide 2.9-IS ppbv <3.1 <3.0 <3.0 <3.0 <2.9 <2.9 <15 <3.1
<br /> 2-Butanone MEK) 2.9-15 ppbv <3.1 4.2 5.5 8.8 3.9 4.9 30 <3.1
<br /> 4-Eth (toluene
<br /> 2.9-15 ppbv 3.2 7.2 3.6 l2 Q.9 2.9 <15 <3.1
<br /> Ethanol 2.9- 15 ppbv 4.4 5.2 3.6 5.6 4.4 3.6 <15 <3.1
<br /> MTBE 2.9-15 ppbv <3.1 <3.0 <3.0 1 90
<br /> <:not detected at the reporting limit shown
<br /> ppbv:parts per billion by volume
<br /> MEK:methyl ethyl ketone
<br /> MTBE:methyl tertiary-butyl ether
<br /> The VOCs acetone, benzene, MEK, chloroform, MC, and toluene were detected in the groundwater
<br /> samples. A summary of the detected VOC constituents in the groundwater samples is presented in Table
<br /> 15, on the next page. Laboratory report sheets indicating analytical methods used, detection limits, and
<br /> the results of the analyses are included in Appendix B. Selected analytical results are indicated on Figure
<br /> 13, Appendix A.
<br /> Methylene chloride, a common laboratory contaminant, was detected in the travel blank sample
<br /> • submitted to the laboratory at a concentration of 0.41 µg/L.
<br /> 1 ,
<br /> is CONDOR
<br />
|