CENE 282 HW3 You must work in teams of 3-4, turn in one assignment per team. Release, Fate & Transport problems. For each case below, use the Transport Checklist to assess the following scenarios. Then: a) Sketch the scenario (similar to the notes in class). Use pencil to do the sketch, with a red colored pencil/pen to show the movement of the contaminant. b) List possible exposure considerations (persistence/bioaccumulation, likely populations exposed, future uses and effects) 1. A railroad tanker car containing a DNAPL spills it on the tracks. The tracks are situated on a gravel railbed built on a silty sand soil that is 25’ above the water table. Below the water table, an aquifer (3’ thick) of sand/gravel lies above a clay aquiclude. 1500m away is a river; its bottom reaches 2’ into the clay aquiclude. Before the spill can be cleaned up, a heavy rainstorm occurs. There are no populated areas between the tracks and the river, but the river is home to many sensitive aquatic species. 2. Lead from historical uncontrolled smelting activities has been deposited on the steep hillsides surrounding the community located in the valley between the hillsides. A creek runs through the community and discharges to a larger river that feeds a lake 50 miles downstream. Logging and the high sulfur air emissions from the smelter destroyed all the trees on the hillsides, but small shrubs are present. The severely lead-contaminated community just completed a massive, costly yard soil removal and house dust abatement program to reduce soil & dust lead levels in the community. Recently heavy rains fell, causing the unremediated soils on the adjacent hillsides to slide into the community. Soils in the community are alluvial and highly heterogeneous, but are mostly silts and sands. Soils on the hillsides are clayey silts. 3. A narrow canyon with residential homes scattered within houses a perennial creek. The homes each have their own septic systems. Homes are supplied by wells from a deeper (400’) aquifer. Soils are sandy silts (alluvial) over fractured bedrock and range from 5-20’ above the water table which also supplies the creek. Distances to the creek from septic leach fields range from 10-150’. In addition to nutrients and bacteria from the septic systems, it is expected that many personal care products and pharmaceuticals are discharged in these systems. Researched Autobiography Purpose: To become familiar with Library sources to help tell the story of your life. Outline: Introduction: Introduce your autobiography with a personal story, a meaningful quotation, or a significant statistic. Thesis: For a narrative essay, the thesis is different than in making an argument. In this case, you need to answer the question “What is this autobiography about, and why is it important to me/a person close to me/my community?” Remember, you’ve chosen either to write about some aspect of your own life, the lives of some ...

1. CENE 282 HW3
You must work in teams of 3-4, turn in one assignment per
team.
Release, Fate & Transport problems. For each case below, use
the Transport Checklist to assess the following scenarios.
Then:
a) Sketch the scenario (similar to the notes in class). Use pencil
to do the sketch, with a red colored pencil/pen to show the
movement of the contaminant.
b) List possible exposure considerations
(persistence/bioaccumulation, likely populations exposed,
future uses and effects)
1. A railroad tanker car containing a DNAPL spills it on the
tracks. The tracks are situated on a gravel railbed built on a
silty sand soil that is 25’ above the water table. Below the
water table, an aquifer (3’ thick) of sand/gravel lies above a
clay aquiclude. 1500m away is a river; its bottom reaches 2’
into the clay aquiclude. Before the spill can be cleaned up, a
heavy rainstorm occurs. There are no populated areas between
the tracks and the river, but the river is home to many sensitive
aquatic species.
2. Lead from historical uncontrolled smelting activities has been
deposited on the steep hillsides surrounding the community
located in the valley between the hillsides. A creek runs
through the community and discharges to a larger river that
feeds a lake 50 miles downstream. Logging and the high sulfur
air emissions from the smelter destroyed all the trees on the
hillsides, but small shrubs are present. The severely lead-
contaminated community just completed a massive, costly yard
soil removal and house dust abatement program to reduce soil &
dust lead levels in the community. Recently heavy rains fell,
causing the unremediated soils on the adjacent hillsides to slide
into the community. Soils in the community are alluvial and
highly heterogeneous, but are mostly silts and sands. Soils on

2. the hillsides are clayey silts.
3. A narrow canyon with residential homes scattered within
houses a perennial creek. The homes each have their own septic
systems. Homes are supplied by wells from a deeper (400’)
aquifer. Soils are sandy silts (alluvial) over fractured bedrock
and range from 5-20’ above the water table which also supplies
the creek. Distances to the creek from septic leach fields range
from 10-150’. In addition to nutrients and bacteria from the
septic systems, it is expected that many personal care products
and pharmaceuticals are discharged in these systems.
Researched Autobiography
Purpose: To become familiar with Library sources to help tell
the story of your life.
Outline:
Introduction: Introduce your autobiography with a personal
story, a meaningful quotation, or a
significant statistic.
Thesis: For a narrative essay, the thesis is different than in
making an argument. In this case, you need
to answer the question “What is this autobiography about, and
why is it important to me/a person close

3. to me/my community?” Remember, you’ve chosen either to
write about some aspect of your own life,
the lives of some of your interesting ancestors, or the life of
your community.
Body: Tell the story, incorporating facts you’ve learned from
your research. Use the facts to support
the main story you have to tell, not to tell it for you. Follow
MLA style for this paper.
Conclusion: So what? Why does this story matter to you, your
family, or your community? Reflect on
this. Whether you’re writing about self, family or community,
how does this have a bearing on who you
are today?
Works Cited: Sources listed alphabetically by author’s last
name.