Turbidity Information Available for Wednesday, June 16, 2010

• From April 1, 2010 to June 15, 2010, water from the basin was not discharged. The water from the basin was pumped to locations
  on-site in order to allow for the level of water in the basin to be controlled, so that work activities in and around the basin
  could be conducted. On June 16, 2010, in response to heavy rains received, the skimmer was turned to allow water to discharge
  from the basin through the outlet structure as designed. 
• Prior to discharging through the skimmer, 10 turbidity readings were collected in the basin.  All readings were below the Site turbidity Performance Standard of 250 NTUs.  Discharge from the basin began at 2:45 pm on June 16, 2010.   
• A turbidity reading was collected at the discharge pipe at 2:47 pm.  The turbidity result was 146 NTUs.
• A turbidity reading was collected at the off-site discharge point at 3:00 pm.  The turbidity result was 158 NTUs.
• A turbidity reading was collected at the off-site discharge point at 3:25 pm.  The turbidity result was 77.2 NTUs.
• A turbidity reading was collected at the off-site discharge point at 4:35 pm.  The turbidity result was 48.1 NTUs.
• The monthly total and dissolved lead samples were collected at the off-site discharge point on June 16, 2010.   Dissolved lead was not detected at a detection limit of 1 ug/L.  The NPDES permit standard for maximum dissolved lead for the Site is 650 ug/L. The total lead result was 3.4 ug/L. There is not an NPDES standard for total lead, but the total lead result will be compared to the turbidity levels and then to the dissolved lead result.  These results confirm that the turbidity performance standard is protective against a release of lead into the Lackawanna River.  

 

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Page Last Modified Tuesday October 19, 2010 01:37:56 PM