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TABLE 1 -RESULTS OF LABORATORY ANALYSIS:DIESEL TANKS <br /> STOCKTON UNIFIED SCHOOL DISTRICT <br /> TRANSPORTATION CENTER <br /> HLI 00817 <br /> Location' Sample Depth TPH-D Benzene Toluene Ethyl- Xylenes <br /> (feet) (mg/Kg) (ug/Kg) (ug/Kg) benzene (€1Ka) ppm" <br /> (ug/Kg) <br /> Tank Samples: , <br /> Excavation <br /> T-5 592 14 <1.0 <5 <5 <5 <5 <br /> 593 13.5 : <1.0 <5 <5 < 1.9 ` <br /> T-6 594 14 <1.0 <5 < 5 <5 1. [ <br /> 599 15 <1.0 <5 <5 <5 <5 5.0 <br /> 5 <5 4.11 <br /> T 7 595 15 <1.0 <5 <5 < <br /> 596 14 <1.0 <5 <5 <5 <5 1.9 <br /> 5 1.9 <br /> 597 IS <L0 <5 <5 <5 � <5 7.5 <br /> 604 17 250 <50 <50 280 / 2,270 75 <br /> 604 18' 6,150 <150 <150 536 I\ 2,740 NA <br /> Stockpiles. <br /> S-1 to S-4 584-7 <1 <5 <5 <5 8 NA i <br /> S-5 to S-8 588-91 <1 <5 <5 , <5 <5 NA <br /> S-9 to S-12 600-603 271 <50 <50 <50 70 NA <br /> S-13 638 6,190 <65 <65 85 114NA <br /> Pipeline Samples: <br /> Trench: <br /> P-1 612 5'9", <1.0 <5 <5 <5 <5 2.1 <br /> P-2 613 4'9" <1.0 <5 <5 <5 <5 2.0 <br /> P-3 614 5'2" <1.0 <5 <5 <5 <5 1.9 <br /> P-4 615 4'9" <1.0 <5 <5 <5 <5" 1.9 I <br /> P-5 616 4'10" <1.0 <5 <5 <5 <5 2.0 <br /> P-6 617 510" <1.0 <5 <5 <5 <5 ` 2.0 <br /> P-7 618 5'0'' . <1.0 <5 <5 <5 <5 2.0 <br /> P-8 619 5'0" <1.0 <5 <5 <5 <5 2.0 p <br /> P-9 620 4'10" <1.0 <5 <5 <5 <5 2.0 <br /> P-10 621 5101, <1.0 <5 <5 <5 <5 1.9 <br /> P-11 622 5'0", <1.0 <5 <5 <5 <5 2.0 <br /> P-12 623 5'0". <1.0 <5 <5 <5 <5 2.2 <br /> P-13 624 5'0" <1.0 <5 <5 <5 <5 4.2 <br /> P-14 625 5'0" <1.0 <5 <5 <5 <5 2.2 f <br /> P-15 626 5'6" <1.0 <5 <5 <5 <5 1.9 t <br /> P-16 628 510" <1.0 <5 <5 <5 <5 2.2 <br /> P-17 629 5'6 1,550 <50 <50 <50 <50 1.8 <br /> Stockpiles <br /> SP-1 630 - - <1.0 <5 <5 <5 <5 NA <br /> SP-2 631 <1.0 <3 <5 <5 <5 NA <br /> ii <br /> SP-3 632 --- 2.2 <5 <5 <5 <5 NA <br /> a. Refer to Figures 1 and 2 for location of tank samples. Pipeline samples collected at 20-foot intervals <br /> from tanks to dispensing island. <br /> b. OVA measurements reflect container headspace vapor concentrations measured by Foxboro' 128 <br /> OVA. Measurements reported as parts per million (ppm) as methane equivalent. Ambient levels <br /> varried between 1.4 and 1.6 ppm. <br /> TPH-D=Total Petroleum Hydrocarbons as diesel. - <br /> ^< =Laboratory Limit of Detection <br /> NA=Not Analyzed <br /> k <br /> i <br />