Innovative/Alternative Septic System Performance System Performance and Tracking it with the Carmody Database Barnstable County Department of Health and Environment

By The Numbers Permit Breakdown by Town and System Type

Box-Whisker Diagrams 50% Probability Density Graph (“Bell Curve”) Median – Middle Value Min/Max Value Box Whiskers What are they? Min/Max Value 25%

Box-Whisker Diagrams What Can We Use Them For? ABCD A – A “Good” System. Box and whiskers are short and compact. B – A “Bad” System. Results are all over the place. Box and whiskers are stretched out. C – A “Consistently Bad” System. Compact but well above TN limit (19 mg/l) D – A “Usually Pretty Good” System. Compact but maybe a couple of high results.

Single Family all Types by Individual System Three or More Samples with Full Nitrogen Series 761 systems with 3 or more TN samples 569 of 761 (75%) with median TN <19 mg/l

Single Family all Types (Brewster) Three or More Samples with Full Nitrogen Series 10 systems with 3 or more TN samples 6 of 10 (67%) with median TN <19 mg/l SinBio Sin FASWatAdv

Single Family all Types by System Type Three or More Samples with Full Nitrogen Series

Single Family Advantex (County) Three or More Samples with Full Nitrogen Series 27 systems with 3 or more TN samples 21 of 27 (78%) with median TN <19 mg/l

Single Family Bioclere (County) Three or More Samples with Full Nitrogen Series 43 systems with 3 or more TN samples 32 of 43 (74%) with median TN <19 mg/l

Single Family FAST (County) Three or More Samples with Full Nitrogen Series 442 systems with 3 or more TN samples 355 of 442 (80%) with median TN <19 mg/l

Single Family OMNI RSF (County) Three or More Samples with Full Nitrogen Series 51 systems with 3 or more TN samples 30 of 51 (51%) with median TN <19 mg/l

Single Family Generic RSF (County) Three or More Samples with Full Nitrogen Series 16 systems with 3 or more TN samples 9 of 16 (56%) with median TN <19 mg/l 10 of 16 (63%) with median TN <25 mg/l

Single Family RUCK (County) Three or More Samples with Full Nitrogen Series 22 systems with 3 or more TN samples 11 of 22 (50%) with median TN <19 mg/l

Single Family Septitech (County) Three or More Samples with Full Nitrogen Series 45 systems with 3 or more TN samples 15 of 45 (33%) with median TN <19 mg/l

Single Family Septitech Three or More Samples with Full Nitrogen Series

Single Family Singulair (County) Three or More Samples with Full Nitrogen Series 90 systems with 3 or more TN samples 81 of 90 (90%) with median TN <19 mg/l

Single Family Waterloo Biofilter (County) Three or More Samples with Full Nitrogen Series 11 systems with 3 or more TN samples 7 of 11 (64%) with median TN <19 mg/l

Nitrex System at 15 Dory Lane, Eastham Influent versus Effluent Total Nitrogen Design Flow = 9,900 gpd 40 Houses at Buildout 30 Houses currently occupied, with 6 seasonal

Single Family all Types by System Type Three or More Samples with Full Nitrogen Series System Type Total with 3+ Samples Total below 19mg/l Orleans Percentage Cape-Wide Percentage All Types10660%75% Advantex100%78% Amphidrome75% Bioclere4250%74% FAST11100%80% OMNI RSF51% RSF (Generic)56% (63%) RUCK50% Septitech33% Singulair33100%90% Waterloo100%64%

Keeping Track of it All… Sample Reports Messages mg/L > 19mg/L(36%) for Total Nitrogen 1 Consecutive 4 Non-Consecutive (25.83,8.54,43.4,29.35,24.1) Amount of the Exceedance Exceedance Percentage Exceeding Parameter Number of Consecutive Exceedances Number of Non- Consecutive Exceedances Results from the Last Five Samples

Town of Eastham Sample Exceedance Report - 3/29/2011 System IDHome OwnerMunicipalitySampling HistoryMedianAverageStDev EASam300Sep Baughman, James and Amanda 300 Samoset Road Eastham,MAEastham /26/ /28/ /28/ /28/ /29/ EASun093Adv Bechgaard, Candace 93 Sunset Avenue Eastham,MAEastham /2/ /27/ /26/ /28/ /27/ EAR06418RSF Brown, Robert 4180 Route 6 Eastham,MAEastham /2/ /20/ /9/ /23/ /3/ EACam760FAS Civita, George 760 Campground Road North Eastham,MANorth Eastham /21/ /9/ /18/ /14/ /3/ EABri220Bio Conlin, Kevin 220 Bridge Road Eastham,MAEastham /5/ /19/ /8/ /13/ /2/ Keeping Track of it All… “Cleaned Up” Sample Exceedance Report Exceedance reports will be delivered semi-annually. BOH will decide what action to take, since each BOH will likely have a different policy.

Innovative/Alternative Septic System Performance System Performance and Tracking it with the Carmody Database Barnstable County Department of Health and Environment