Alert Waste Spill Alert Waste Spill Environ

Alert     Waste   Spill Alert      Waste   Spill Environ

Alert Waste Spill Alert Waste Spill Environmental Science Artesian well Artesian Well Artesian Well There are two broad classes of drilled well types based on the type of aquifer the well is in Shallo

  • Uploaded on | 3 Views
  • alexis alexis

About Alert Waste Spill Alert Waste Spill Environ

PowerPoint presentation about 'Alert Waste Spill Alert Waste Spill Environ'. This presentation describes the topic on Alert Waste Spill Alert Waste Spill Environmental Science Artesian well Artesian Well Artesian Well There are two broad classes of drilled well types based on the type of aquifer the well is in Shallo. The key topics included in this slideshow are . Download this presentation absolutely free.

Presentation Transcript

Slide1Alert:  Waste  Spill Alert:   Waste  Spill Environmental Science

Slide2Artesian well

Slide3Artesian Well Artesian  Well

Slide4There are two broad classes of drilled-well types, based on the type of  aquifer  the well is in:  Shallow  or  unconfined wells   are completed in the uppermost saturated aquifer at that location (the upper unconfined aquifer).

Slide5Deep  or  confined wells   are sunk through an impermeable layer into an aquifer that is sandwiched between two impermeable strata  The majority of deep aquifers are classified as artesian wells.

Slide6Ground water  well Ground  water  well

Slide8Artesian Well Artesian  Well  Artesian wells are …    where the water is confined under pressure below layers of relatively impermeable rock.

Slide9Geologist…studies land formations,  rocks  and  soil Geologist…studies  land formations,  rocks  and  soil Situation… You are a geologist for the Clear Hydro Environmental Geology Company. You receive this urgent email message from a Lake County Illinois Conservation officer:

Slide10URGENT MESSAGE  FROM  LAKE  COUNT CONSERVATION  BOARD!! URGENT  MESSAGE  FROM  LAKE  COUNT CONSERVATION  BOARD!!  Complaints from residents near Round Lake re: unusual odors coming from their well water.  Residents informed that a tanker was carrying liquid chemical waste had an accident and overturned a month ago.

Slide11URGENT WATER  WARNING!! URGENT  WATER  WARNING!!  Concern : Waste spill has infiltrated into the groundwater and has contaminated wells of the 15 residents.  Wells sites #1 and #2 complaints of odors and funny-tasting well water.  Residents were told not to drink the water from their wells.   Possible health risk.

Slide12URGENT-WATER WARNING! URGENT-WATER  WARNING! Geologists Action Required: Part A:  Identify soil layers & properties 1. Label Maps #2 with the soil properties. 2. Review Map 3 and understand well layouts and the direction of water flow. 3. Color in Map 3 with data from Table 3 on the different layers of soil within the groundwater topographical profile.

Slide13URGENT- WATER  WARNING! URGENT-  WATER  WARNING! 4.  Conduct well-water analysis where you determine the extent of the groundwater pollution plume. 5.  Record your findings and make a recommendation to the Lake County Conservation Board on which wells are contaminated.

Slide14How a  well  is  dug How  a  well  is  dug

Slide15Urban and suburban toxic waste sites usually arise from: a. industrial operations b. leaking underground storage tanks and pipes (such as from gas stations) c. municipal dump sites d. leaking hazardous waste storage sites, and perhaps e.  contamination left over from closed military bases. The severity of groundwater contamination depends on characteristics of the waste or leachate (e.g., volume, composition, solubility, concentration of various constituents, time rate of release of contaminants, the size of the area from which the contaminants emanate, groundwater pumping and recharge, and other factors).

Slide16 Major concerns at a polluted site is: 1. The migration of contaminants offsite to     the underground aquifer, where they can pollute the groundwater.  2. Many communities pump groundwater     for their drinking water and these     contaminants can severely compromise     its quality.

Slide17Vocabulary:  Plume : A featherlike structure, form, or object, generally narrow at its origin and spreading out as it progresses.

Slide18Dispersion : process of leachate moving out from original source. Theoretically, plumes will be conically shaped - the exact shape depending on contaminant and soil properties  Infiltration : Flowing into the ground or aquifer. Surface water will usually infiltrate if the soil is permeable. Rainfall helps contaminants infiltrate the soil and possibly move into the aquifer and groundwater.

Slide19Hydraulic gradient : The slope of the water table. The groundwater flows downhill and the gradient determines the rate of flow.

Slide20Maximum Contaminant Level (MCL) : The maximum level of certain contaminants permitted in drinking water supplied by a public water system as set by EPA under the federal Safe Drinking Water Act.

Slide21How are  they  different? How  are  they  different? Plume A Plume B

Slide22Different types  of  plumes Different  types  of  plumes Plume C Plume D

Slide23What types of conditions affect a plume?    1. Porosity and permeability of the soil    2. Rate of groundwater infiltrating the soil

Slide24Location:  Round  Lake  Illinois Location:   Round  Lake  Illinois