What concentration would correspond to a risk

Assignment Help Civil Engineering
Reference no: EM13549255

The drinking water standard for dioxin is 3 x 10-8 mg/L. Using EPA exposure factors for residential consumption, what lifetime risk would this pose? What concentration would correspond to a risk of 10-6? The following data and assumptions apply: Data or Assumption Value Cancer Slope Factor = 1.56 x 10^5 (mg/kg x day)^-1 Average Body Weight = 70 Kg Average Lifespan = 70 Years Average Daily Water Intake = 2 L/day Average Time in One House = 30 Years Absorption Factor = 1.0.

Reference no: EM13549255

Questions Cloud

The change in length of the cable when the beam is under : A 4-m-long rigid beam is supported by a pinned connection and cable. the beam weighs 2.0 kn and hangs horizontally when unloaded When the beam is not loaded the solid cable is 4.00 m long and has a solid area of 175 mm1
What will the ammonia concentration be 10 miles downstream : The concentration of ammonia is 6 mg/L at one point in the river. If the first – order decay coefficient for the conversion of ammonia to nitrate is 0.05 day-1, what will the ammonia concentration be 10 miles downstream.
What is the normal depth in a 4-foot wide rectangular : What is the normal depth in a 4-foot wide rectangular channel that conveys a discharge of 100 CFS and has a bed slope of 2% with a Manning’s roughness coefficient of 0.025? a).1.3 feet b).2.7 feet c).4.4 feet d).6.2 feet
How many gallons would be required to last the same time : How many gallons would be required to last the same time as the gas? The sodium hypochlorite solution strength is 15 percent by weight and has the same unit weight as water (specific gravity 1.0). One pound of sodium hypochlorite has the same disinfe..
What concentration would correspond to a risk : The drinking water standard for dioxin is 3 x 10-8 mg/L. Using EPA exposure factors for residential consumption, what lifetime risk would this pose? What concentration would correspond to a risk of 10-6? The following data and assumptions apply: Data..
What is the volume of the lake in cubic feet : A shallow lake can be considered a CFSTR. Nitrification, the conversion of ammonia to nitrate (NH3 -> NO3-) occurs in the lake according to first – order kinetics. One stream feeds the lake and one stream empties the lake with the flow rate in both b..
Friction between the floor and the base of the ladder : Modify function random0 so that it can accept 0, 1, or 2 calling arguments. If it has no calling arguments, it should return a single random value. If it has 1 or 2 calling arguments, it should behave as it currently does.
What is the estimated uncertainty in the length of this : The base line vector between the base and roving reciever is 8340m and has an accuracy of +/-(1to 2 cm +/-2ppm). What is the estimated uncertainty in the length of this vector?
What is the terminal settling velocity of a particle with : What is the terminal settling velocity of a particle with a specific gravity of 1.4 and a diameter of 0.01 mm in 20 degrees celcius water?

Reviews

Write a Review

Civil Engineering Questions & Answers

  What is the concentration of mlvss in the activated sludge

The concentration of Chemical Oxygen Demand (COD) in the effluent from this system is 25 mg L-1. The growth rate of the organisms in this case is 0.9 days-1. The activated sludge tank has a volume of 50 m3 and the flow rate through it is 500 m3 da..

  Draw the v-t graph and determine the maximum speed of the

A train starts from rest and travels 1 kilometer at uniform acceleration. The next 2 kilometers it travels at uniform speed. The train decelerates uniformly before coming to a rest. If the total time is 6 minutes, draw the v-t graph and determine the..

  Compute the max possible moment at the centerline

compute the max possible moment at the centerline of the beam and the absolute moment in the beam.

  Design concrete column of 14 ft high to support a dead load

Design a concrete column of 14 ft high to support a dead load of 80 kips and a live load of 200 kips. f'c= 6,000 psi fy= 60,000 psi

  Derive this equation from the basic material

Absolute value signs serve as a reminder that, at this point Td and Te must be expressed as absolute temperatures.

  What is the break-even number of units per year

A semiautomated system has been developed as an alternative. The costs for the proposed method are $40,000 for equipment and $1.00 per manufacturing cost per unit. What is the break-even number of units per year

  Define what is the probability that a drought is more severe

What is the probability that a drought is more severe than a drought of a return period of once in 50 yr will occur exactly twice in 100 yr

  The function of turn buckle in designing saloon and steel

In the first couple steps you are using the sine function to derive that the interior triange BCG is a right triangle. However, the sine function, by definition, is opposite divided by hypotenuse. You used sine as opposite dividede by adjacent which ..

  What is the water content of the material when saturated

The dry density of a compacted sand is 1.87 Mg/m^3 and the density of the solids is 2.67 Mg/m^3. What is the water content of the material when saturated. Include a phase diagram.

  Calculate the torque and torsional shearing at the wall

a 31' solid circular bar of 2" diameter is fixed to a wall. it is made of aluminum of E=10*10^6. a 30" circular solid 1" diameter aluminum bar is welded to the 2" bar at a 30" centerline perpendicular relative to the other bar per the diagram.

  Calculate total vertical stress and pore water pressure

if the density of the clay is equal to 2.0 Mg/m3 ,calculate the total vertical stress ,pore water pressure and effective vertical stress at a depth of 5 meters below ground level.

  Calculate the maximum shear force v of resisting

If the allowable shear stress is 100 MPa, calculate the maximum shear force V that a W460 X 60 structural steel wide flange is capable of resisting. Use the average web shear approach.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd