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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 17th) 

• 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 application
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• 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 behind 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 22nd) 

• 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, YEL200, 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 19th) 

• 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/cm2) 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 16th) 

• 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 application 
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• 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 4th) 

• 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