Environmental Forensics: Principles and Applications - Chapter 5 docx

... observation, Geoderma, 45: 51 58 . Kung, J., 1990b. Preferential flow in a sandy vadose zone. 2. Mechanism and implications, Geoderma, 46 :59 –71. Jury, W. and K. Roth, 1990. Transfer Functions and Solute Movement ... include: •Finite-difference • Finite-element • Boundary-element • Particle tracking: method of characteristics (MOC), modified method of character- istics (MMOC), and r...

Ngày tải lên: 11/08/2014, 09:21

... Week (mg/L) (mg/L) Anaerobic 0 57 0 54 0 4 420 260 8 58 0 340 95 73 54 Aerobic 0 600 650 2 440 440 4 54 0 480 14 430 260 Aerobic 0 600 54 0 2 58 0 54 0 4 620 600 14 650 50 0 ©2000 CRC Press LLC imported ... 45% between 1978 and 19 85. The decrease in the demand of chlorinated solvents during 1978 to 19 85 reflects the production ban on 1,1,1-trichloroethane (1,1,1-TCA, or TCA...

Ngày tải lên: 11/08/2014, 09:21

... < ;50 0.06 < ;50 108 1 250 1.02 < ;50 1 95 9.390 0.42 < ;50 34.8 2010 0.08 < ;50 <0.02 NA a <0.03 NA a 255 41,800 411 330,000 318 89 ,50 0 341 223,000 252 22,200 351 192,000 217 11 ,50 0 ... intersected the silty sand and a highly permeable sand and gravel layer. Concern about the longer screened, upgradient well diluting the TCE concen- tration via the uncontaminat...

Ngày tải lên: 11/08/2014, 09:21

... 2.0 o-Xylene 2.27 p-Xylene 1.72 m-Xylene 5. 66 2-Butene 0.3 15 a 2-Pentene 0.4 35 a Butane 3.83 1,2,4-Trimethylbenzene 3.26 Pentane 3.11 a Average of cis- and trans ©2000 CRC Press LLC conditions and ... 1760 Toluene (C 6 H 5 CH 3 ) 724 51 5 57 3 Ethylbenzene (C 6 H 5 CH 2 CH 3 ) 197 153 177 m-Xylene (C 6 H 4 (CH 3 ) 2 ) 196 158 146–173 o-Xylene (C 6 H 4 (CH 3 ) 2 ) 142 152 213...

Ngày tải lên: 11/08/2014, 09:21

... locations S1-EX3 and S9-EX5 (see 3a) were also omitted. Sample locations located 30 ft to the east (S 5- 5- PL, S 9-7 -PL), however, were projected onto the A-A¢ transect in 3a and incorpo- rated into ... cross-section. In the case of the transect A-A¢ in Figure 6.3(3b), data along the transect that were not used included locations S-EX7 and S 4- 3-PL. Sampling locations within...

Ngày tải lên: 11/08/2014, 09:21

... Tertiary-amyl- Tertiary-hexyl- Ethyl-tertiary- Tertiary-amyl- Diisopropyl butyl-ether methyl-ether methyl-ether butyl-ether ethyl-ether ether Chemical formula (CH 3 ) 3 COCH 3 (CH 3 ) 2 (C 2 H 5 ) COCH 3 (CH 3 ) 2 (C 3 H 7 ) ... 163 214 155 Composition (%wt) Carbon 68.13 70 .53 72. 35 70 .53 72. 35 70 .53 Hydrogen 13.72 13.81 13.88 13.81 13.88 13.81 Oxygen 18. 15 15. 66 13.77 15. 66 13...

Ngày tải lên: 11/08/2014, 09:21

... PAHs. 20 mAU 20 mAU 255 nm 280 nm 360 nm 3 35 nm Absorbance ( 255 nm) Absorbance 0.0 5. 0 10.0 15. 0 1 1 2 3 4 5 6* 7 8 9 11 12 13 14* 15 16 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 10* Sample: 10 µL ... 40 mL of chlorine-disinfected drinking water is placed in a sealed HS vial and heated, and 0 .5 cc of the headspace is sampled and injected directly into a C-GC-ECD. The C-GC-EC...

Ngày tải lên: 11/08/2014, 21:21

... (8) RfD: 4 × 10 5 mg/kg/day (53 ) TLV: 0.1 mg/m 3 (8-hour) (skin) (47) Basic manufacturer Sanex, Inc. 53 00 Harvester Road Burlington, Ontario L7L 5N5 Canada Telephone:90 5- 6 3 9-7 53 5 5. 2.9 Ethion Trade ... flashpoint of 180°F (13). Chemical name: O,O-diethyl 0-2 -isopropyl-6-methyl(pyrimidine-4-yl) phosphor- othioate (13) CAS #: 33 3-4 1 -5 Molecular weight: 304. 35 (13) S...

Ngày tải lên: 11/08/2014, 04:20

... removing small wetlands (i.e., 4. 05 ha) within a 600-km 2 area in Maine that contained 354 wetlands ranging in size from 0. 05 to 1 05. 3 ha. Loss of small wetlands reduced total wetland area by only ... habitat, of which some 18 .5 million ha are wetlands. Such protection and management of wetlands continue today, powered by an understanding of why a landscape-level approach to wetlan...

Ngày tải lên: 12/08/2014, 02:20