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# Summary of Mosquito Project Sample Results Project Years 2003, 2004, 2005 & 2007 2003 Sampling Season • 

## Sample matrix was water • 

## Samples were collected from the Saddle River (behind Paramus Catholic High School) and the lake near the treatment plant in Little Ferry • 

## Neither site had any detections at Time 0 or at Point A (closest to the start of the application) • 

## Samples collected from the Saddle River had detections of PBO only • 

## PBO was detected at Time 15, 30 and 45 minutes after the application in the middle of the application path (Points B and C) • 

## Samples collected from the lake showed detections of both PBO and resmethrin • 

## Detections occurred at Time 30, 60 and 90 minutes after the application and both Points B (along the application path) and Point C (on the opposite side of the lake) • 

## Water samples from the lake were loaded with thick green “scum” from the surface of the water • 

## Concentrations of detections were similar at both sites and for both parameters • 

## Detections at the lake demonstrate relatively rapid movement of the product away from the application path and across the lake 

# 2004 Sampling Season • 

## Sample matrix was filter paper • 

## Samples collected along the application path and the recreation path on the opposite side of the Saddle River • 

## Samples were collected from six points along the path at Time 0, 1, 2, 3, 24 and 48 hours after the application • 

## Only PBO was detected in the samples • 

## There were no detections on the opposite side of the river from the application path • 

## Detections occurred at Time 1 hour at Points A2, A3, B2, B3 and C (control point outside of the woods) • 

## Detections show movement of the product away from the application path, through the woods, toward the school, within the first hour after the application • 

## One outlier detection at Time 24 at Point B2 

# 2005 Sampling Season Saddle River Site (August 17 th 

# ) • 

## Matrix was filter paper • 

## Fluorescent tracer was added to product being applied • 

## Six sample points arranged 20 feet and 100 feet perpendicular to the application path • 

## Samples collected 15 minutes after applicationPage 2 of 3 • 

## All six sites showed detections of PBO (above the calibration limits of the GC/MS) • 

## Only Point B1 had a detection of resmethrin • 

## Fluorescent tracer was not observed • 

## Ten sample points arranged behi nd the stationary motorcycle • 

## Furthest point was approximately 20 feet from motorcycle • 

## All ten points showed detections of PBO (above calibration limits) • 

## All points, except S6 (point furthest to the left), showed detections of resmethrin • 

## Concentration of resmethrin was significantly lower than that of PBO • 

## Fluorescent tracer was identified Campgaw Parking Lot (September 22 nd 

## ) • 

## Matrices were filter paper and swabs • 

## Fluorescent tracer was added to product • 

## There were no detections in the swab samples • 

## Ten sampling points were arranged at distances from 150 to 575 feet from the application path • 

## Samples collected after 15 minutes • 

## Both resmethrin and PBO were detected • 

## Detections occurred at BL150, YE L200, YEL375, OR150 and OR400 • 

## Detections showed significant movement of the product away from the application path • 

## Fluorescent tracer was not observed Campgaw Parking Lot (October 19 th 

## ) • 

## Matrices were filter paper and swabs • 

## 15 sampling points arranged in 3 rows of 5 points each, perpendicular to the application path • 

## Distances were 25, 50, 100, 175 and 250 feet from application path • 

## Fluorescent tracer was added to product • 

## Samples were collected 15 minutes after the application • 

## Nothing was detected in the swab sample • 

## ONLY PBO was detected (ng/cm 2 

## ) in all of the filter paper samples • 

## Fluorescent tracer was not observed • 

## Detections demonstrate uniform movement of product across the sampling sites 

# 2007 Sampling Season Electronics Road – Hamilton Shooting Range (August 16 th 

## ) • 

## Matrix was filter paper • 

## 8 sampling points for hanging filter paper • 

## Directly above application path • 

## 13 sampling points for ground filter paper • 

## On either side of application path ~ 5ft • 

## Samples were collected 1 hour after the applicationPage 3 of 3 • 

## Resmethrin detected in 2 of 9 hanging samples • 

## Resmethrin detected in 6 of 13 ground samples • 

## PBO detected in all samples Electronics Road – Hamilton Shooting Range (October 4 th 

## ) • 

## Matrix was filter paper • 

## 8 sampling points for hanging filter paper • 

## Directly above application path • 

## 4 sampling points for ground filter paper • 

## On either side of application path ~ 5ft • 

## Samples were collected 1 hour after the application • 

## Resmethrin detected in 7 of 8 hanging samples • 

## Resmethrin detected in 4 of 4 ground samples • 

## PBO detected in all samples