10 Biggest Mistakes Groundwater Remediation R1

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  • 1. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 2. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS The Nielsen Environmental Field School, Inc. 2012 North American Environmental Field Conference & Exposition AVOIDING THE 10 BIGGEST MISTAKES IN GROUND-WATER REMEDIATION 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 3. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 4. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS John Scripter, Technical Sales JohnS@GeotechEnv.com 800.228.2310 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 5. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Geotech Corporate Headquarters Denver, Colorado USA …a world leader in environmental technology, manufacturing and product training since 1978. www.GeotechEnv.com 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 6. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS an environmental industry products leader since 1978 partners with federal, state, local and international government agencies over 20,000 private sector clients worldwide distribution in 72 countries provides products and product training to colleges, universities and technical schools around the globe 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 7. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Audience Introductions • Name • Company name • Experience with groundwater remediation 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 8. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Defining the Problem “If I had one hour to save the world I would spend fifty-five minutes defining the problem and only five minutes finding the solution.” 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 9. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 10. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS #10: Mineral Build-up • Builds up on air stripper components and pipes • Builds up on electrodes in pump controllers – Shuts off the system – Inhibits conduction 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 11. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Managing Mineral Build-Up • Laboratory analysis of soil chemistry • Laboratory analysis of water chemistry • Minimize aeration of liquids. Where build-up is anticipated, build in cleanouts for easy maintenance. Cannot really prevent. • Plan system maintenance • Add clean outs • May need to change technology • May need to add a sequestering agent to process flow 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 12. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Case History/Example • Low Profile Air Stripper systems experience frequent fouling of the bubble plates due to high iron/inorganics. This causes a lower stripping efficiency due to lower air flow from the blower. The addition of a sequestering agent helps to keep the inorganics in suspension until after the air stripper. 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 13. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS #9: Temperature • Temperature affects Henry’s Law (vapor phase) because it makes contaminants more likely to volatilize. • pH probes will freeze and break when too cold • Pumps will freeze and break when too cold • If water sampling equipment is not completely purged and dried it can freeze and break • PID lamps fog up when moved from warm to cold • FID’s have problems lighting in cold or windy environments • Heat can also be problematic, causing equipment to overheat, fail and even be ruined 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 14. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Temperature Issue Prevention • Understand your site characteristics, including temperature • Store equipment in a heated area, not in a vehicle or shed • Check the operating temperature specifications on your equipment if you feel there may be an issue • Install below frost line and micro seeps for frost protection above ground • Don’t leave meters or pumps in sheds or work vehicles if freezing is likely to occur overnight. • Heat trace water discharge lines where possible. • Ship “do not freeze” or empty water from cavities if possible. 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 15. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Case History/Example • Dual pumping system at a refinery in northeast was pulled from the well for maintenance. Pumps were left out of the well for a period of time, water was not drained therefore froze, expanded and cracked/split the SST water jackets and reservoirs. 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 16. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS #8: Viscosity • Product characteristics not considered in equipment purchase • Seasonal variability with product recovery • Product too thick for remediation system to pump/sparge • Using in-situ heat enhancement excludes electric pumps • Product viscosity tested at room temperature or worse, at surface temperature in sun – Much less viscous than at groundwater temperature 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 17. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Viscosity • Determine vapor pressure of contaminant to establish best possible equipment for the job • Be sure to approximate actual conditions on- site 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 18. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Case History/Example • Bunker C, #6 Fuel, Creosote are typically too viscous for most pumping systems to operate consistently. Sensors get coated and then can no longer differentiate between water/product. 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 19. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS #7: Air Flow (CFM) • Product not reaching surface • Altitude not considered 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 20. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Example Tampa vs. Denver • Standard Tampa • Denver calculated at calculated at Sea Level 5,280’ – Temp 68° F – Temp 68° F – Air pressure 14.7 PSI (sea – Air pressure 12.2 PSI level) (.00005 PSI / foot elevation) – 100 ACFM (actual CFM) – 82 ACFM (actual CFM) – 100 SCFM (standard CFM – 100 SCFM (big difference) same as actual at standard conditions) 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 21. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS CFM: Very Basically • If SCFM at sea level is 68°F at 36% relative humidity. – Pressure ↓ SCFM ↑ – Pressure ↑ SCFM ↓ 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 22. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Establish CFM • CFM • Standard Cubic Feet per Minute (SCFM): determines the weight of air to fixed or “Standard” conditions – At sea level – 14,696 pounds per square Inch (psia) – 60 degrees Fahrenheit (°F) – 0% relative humidity • Actual Cubic Feet per Minute (ACFM): – Depends on • Pressure • Temperature • Humidity • Inlet Cubic Feet per Minute (ICFM): – When air passes through the filter there will be a pressure drop. 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 23. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Case History/Example • With an SVE or Sparge system, if altitude is not taken into consideration, blowers may be undersized and will not provide flow, vacuum, pressure required. 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 24. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS #6: Total Dynamic Head • Sample is a trickle of what is necessary • Need to replace pump sooner than expected 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 25. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Total Dynamic Head • Calculate trunk line (psi issue) • Calculate length of tube, not a direct measurement to the sampling location, must consider the ups and downs of elevation • Calculate friction of bends • Calculate friction of tubing vs. hard pipe 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 26. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Total Dynamic Head Calculation 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 27. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Case History/Example • A site where a pump was trying to produce 20 GPM, but only had a ¾” discharge line to the treatment system. Due to the head losses, we could only get 12-13 GPM. Increasing the discharge line to 1.5” solved the problem 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 28. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS #5: Water Table Fluctuation • Volatile and trace metal contaminants are removed from the well when high-flow pumping methods purge the wells dry and highly aerate water samples. • Pumping saltwater or water not just product • SVE system is sucking water • Costs are increased due to treating accumulated water • Product layer typically disappears at high water levels – Air exposure to smear zones can reduce product recharge rate when bio growth and heavy oil sludge build up collects on open screen interval 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 29. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Water Table Fluctuation • Tidal influences – Floating intake range of travel is insufficient for tidal fluctuations • Seasonal – Rain events – Drought – May have to move from liquid to vapor phase remediation • Periodic purging or chemical cleaning of smear zone may be required. • More regular maintenance – Smear zone and additional salt crust deposits reduce product recovery recharge rate 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 30. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Case History/Example • Dual Pump system at a site with water table fluctuations. Water pump was allowed to cycle on/off based on hi/lo probe that had 1 foot of travel. Reset the pump in the well so the desired water drawdown was in middle of probe travel. Set the discharge valve so that the pump rate matched the recharge rate. This kept the water table at a steady drawdown allowing more product to enter the well and be recovered. 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 31. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS #4: Salt Water Intrusion • Inconclusive results from sample findings occur when the pumping test is not of a long enough time period to result in true results of water migration into the well bore from a close proximity body of salt water. • Brackish water can lead to corrosion of equipment that is not designed for salt water applications 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 32. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Salt Water Intrusion • Good hydrogeology analysis is worth the expense and time to avoid wrong assumptions of long term results • Thorough pump test over several days can help determine the extent of any salt water intrusion into the well 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 33. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Case History/Example • Introduction of salt water from a nearby body of salt water (salt water intrusion) into a normally fresh water extraction well caused corrosion of a hydrocarbon recovery pumping system designed for a fresh water environment. If a salt water, or brackish water environment was taken into consideration, the equipment could have been purchased with the correct material of construction thus avoiding additional equipment and maintenance costs 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 34. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS #3: Well Construction/Placement • Locations are incorrect to detect groundwater contamination • Assumptions made on topography instead of subterranean geology • Water table column is inaccurate because wells are drilled too shallow to discern true extent of aquifer • Too few monitoring wells in place in a remediation plan resulting in too little data and too many assumptions 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 35. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Monitoring Well Placement • Properly located wells are necessary to determine extent of plume • Can be used as a guideline for placement of recovery wells • Use of down hole cameras allow for more accurate representation of groundwater flow and direction (Boroscope) 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 36. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Recovery Well Diameter • Expectations too high for what can be achieved in 2” well. – Pump tests can be limited – Not designed for long-term applications (sampling only) • Monitor wells typically not designed and developed for use as remediation groundwater extraction and or hydrocarbon recovery wells • Remediation equipment options are limited • Cannot reach the deep water table because what fits in a small well won’t pump at high enough capacity 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 37. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Recovery Well Diameter • Larger remediation wells to allow for: – More flow into the well – More tolerance to well screen clogging – Adequate space for proper pumping/remediation equipment – Allows for monitoring of the well without having to pull out equipment 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 38. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Recovery Well Diameter • Should be rule of thumb: – If free phase product is found, consider drilling larger wells designed for groundwater remediation – Properly screened and developed wells enhance groundwater extraction/hydrocarbon recovery – Drilling a 2” well saves money now, which must be invested later in larger wells or longer O&M, monitoring costs. Longer time to closure – 2” wells are designed for monitoring and limit the effectiveness of remediation. “Penny Wise-Pound Foolish” 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 39. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Improperly designed and installed wells cause: • Contaminant migration from the surface into a water-bearing zone or between water-bearing zones if improperly installed • Chemical alteration of samples due to well casing and well screen materials that are not compatible with the hydrogeological environment or the anticipated contaminants • Well sedimentation and turbid samples due to nonstandard well screen or screen slot sizing • Acquisition of water-level or water quality data from discrete zones is impossible due to improper length and placement of the well screen • Alteration of sample chemical ability or damage to the well as a result of inadequate surface protection measures • Detection of contaminants and collection of reliable data are prevented because drilling method contaminated well 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 40. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Well Design and Installation Tips • Monitoring wells should be designed & placed depending on the hydrogeological, geographical and contaminant-related conditions. • Use appropriate well screen and materials for geology and contaminant characteristics • Drill large enough wells to allow for future remediation options ( pay now or pay later) 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 41. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Case History/Example • Client with a 2” monitoring well looking for a pump to deliver 3 GPM at 75 feet TDH. Because of the size and depth of the well, we are limited to a pneumatic submersible that can only produce just under 2GPM at that depth. If the well was 4” or larger then there are several options that can be considered for this application. 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 42. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS #2 Pilot Tests – Lack thereof • Require assumptions made based on similar sites which may or may not be valid • Too short of a duration can lead to inconclusive, inaccurate or improper data 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 43. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Pilot Testing • Properly conducted pilot tests are essential in gathering data for: -Determining ROI for any potential remediation technology -Air flow requirements for SVE & Sparge Blowers -Water recharge rate for sizing groundwater extraction pumps -Product recharge rate for sizing and determining type of product recovery systems -Sizing and designing solar powered remediation equipment - Bench test for Bio assay when Insitu bio-remedaition is considered. Same concept when considering Insitu Chem-OX 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 44. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Case History/Example • Recently supplied a product recovery system for a client. They called to report that the system was not pumping product into the recovery tank. After some discussions and tests to determine functionability of the system, we found that there was no product in the well for the system to recover. 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 45. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 46. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS #1 Site Characterization • Budget restrictions are probably the biggest factor in limiting proper site characterization • Proper analysis – the right test for the right contaminants of concern (COC) • Full Lab Analysis of water and soil(organics and inorganics) • Viscosity tests for free phase hydrocarbons • Delineation of Contaminant Plume = Amount of contaminant expected to be remediated • Product recharge rates calculated based on pump test on entire well, not just on product layer thickness. Separate hydrocarbon bail down test required to determine recharge of product only when a ground water extraction pump is utilized to enhance product recovery 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 47. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Site Characterization • Proper site characterization leads to: -Determining the correct type of remediation technology -Speeds up site closure -Saves money -Determines economic & technological feasibility of any remediation technology 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 48. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Case History/Example • Product recharge rates calculated based on pump test on entire well, not just on product layer thickness. Separate hydrocarbon bail down test required to determine recharge of product only when a ground water extraction pump is utilized to enhance product recovery 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 49. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS Summary • Planning will save money in the long-run • Be prepared to change your plans based on accumulating site data. Don’t write yourself into a corner. 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com
  • 50. GROUND WATER SAMPLING • WATER LEVEL & PRESSURE • WATER SAMPLE FILTRATION • GROUND WATER REMEDIATION • GEOPHYSICAL MEASUREMENTS John Scripter, Technical Sales JohnS@GeotechEnv.com 800.228.2310 2650 East 40th Avenue • Denver, Colorado 80205 • www.geotechenv.com