Revision History for USGS 
  Scientific Investigations Report 2012-5028

  Adam G. Johnson

  A Water-Budget Model and Estimates of Groundwater 
  Recharge for Guam

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  Abstract, p. 1--Corrected the estimated recharge of the
  northern limestone plateau using the chloride mass-
  balance method:
     from the range 25 to 48 percent to the range 25 to 47
     percent of rainfall
  April 26, 2012

  Table 9, p. 47--Corrected the average chloride
  concentration of groundwater samples at sites:
     Dobo Spring from 10.4 mg/L to 10.5 mg/L
     Almagosa Springs from 10.0 mg/L to 9.9 mg/L
  April 26, 2012

  Table 10, p. 47--Corrected the estimated recharge at
  stations used for bulk-deposition sampling:
     Y-15 (estimate 3) from 35.8 in/yr to 35.6 in/yr
     Beng Bing (estimate 1) from 28.7 in/yr to 28.8 in/yr
     Beng Bing (estimate 3) from 44.9 in/yr to 44.7 in/yr
     Airport (estimate 3) from 39.9 in/yr to 39.8 in/yr
  April 26, 2012

  Recharge Estimates and Sources of Uncertainty Using
  Chloride Mass-Balance Method, p. 47--Corrected the lowest
  recharge estimates at stations used for bulk-deposition
  sampling based on well Y-15:
     from the range 25 to 30 percent to the range 25 to 31
     percent of mean annual rainfall
  April 26, 2012

  Recharge Estimates and Sources of Uncertainty Using
  Chloride Mass-Balance Method, p. 47--Corrected the
  highest recharge estimates at stations used for bulk-
  deposition sampling based on the value used by Ayers
  (1981):
     from the range 39 to 48 percent to the range 38 to 47
     percent of mean annual rainfall
  April 26, 2012

  Summary and Conclusions, p. 49--Corrected the estimated
  recharge of the northern limestone plateau using the
  chloride mass-balance method:
     from the range 25 to 48 percent to the range 25 to 47
     percent of rainfall
  April 26, 2012

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  Posted online at http://pubs.usgs.gov/sir/2012/5028/
  March 8, 2012

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