Presented By Wilbur Mayorga, M.S.,P.E., Chief .
Presented byWilbur Mayorga, M.S.,P.E., ChiefEnvironmental Monitoring and Restoration DivisionDERMFebruary 27, 2014 and updated April 28, 2014
Objectives1. To illustrate Miami-Dade County’s evolvingbackground data set which are centralized andaccessible to the regulated community.2. To present an overview of Miami-Dade County’santhropogenic background study3. Use MDC’s experience as a case study for initiatingdiscussions regarding regulatory framework foraddressing the issues and challenges to the use ofregional background concentrations.
The need Risk assessors and environmental regulators needinformation regarding the distribution and concentrations ofchemicals in soils Naturally occurring or,Resulting from anthropogenic impacts Increasing need for specific regional and local information More flexible options for closing contaminated sites meansthe regulatory community needs access to information Few studies targeting background soil concentrations locallyand nationally
Previous Studies
Previous Studies National (non-exhaustive list) Element Concentrations in Soils and Other Surficial Materials of the ConterminousUnited States.Shacklette and Boerngen (1984), U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1270http://pubs.usgs.gov/pp/1270/pdf/PP1270 508.pdf Cadmium, lead, zinc, copper, and nickel in agricultural soils of the United States ofAmerica.Holmgren G.G.S, M.W Meyer, R.L.Chaney, R.B. Daniel, bsite/Holmgren1993.pdf Major- and Trace-Element Concentrations in Soils from Two Continental-ScaleTransects of the United States and CanadaD.B. Smith et al. (2005) U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1253http://pubs.usgs.gov/of/2005/1253/
Approximately 4800 site (89 in Florida) 14,000 samples (267 in Florida)
Previous Studies States Several states provide generic statewide background valuesfor inorganic chemicals and allow the use of thesebackground values in lieu of site specific backgrounds.However, this information is not necessarily centrally locatedand easily accessible. Although Florida does not have published generic statebackground numbers several studies have been conducted
Florida StudiesNon exhaustive list Ma, et al. (1997)Concentrations and Distributions of Eleven Metals in Florida df Chirenje, Ma, Chen and Zillioux (2002)Comparison between background concentrations of arsenic in urban and non-urban areasof 3b.pdf Ming Chen, Lena Q. Ma and Willie G. Harris (1999)Baseline Concentrations of 15 Trace Elements in Florida Surface pdf Schropp, S.J. and H.L. Windom. 1988.A guide to the interpretation of metal concentrations in estuarine sediments.Coastal Zone Management Section. Florida Department of Environmental Regulation. Tallahassee, Scarlatos and Scarlatos (1997)Ecological impact of arsenic and other trace metals from application of recovered screen material onFlorida soils. FCSHWM special waste publication No. 97-5.
The data from referenced studies indicated Concentrations were significantly influenced by soilgeochemistry as well as land use. A need for a better understanding of distribution at locallevels to establish local and sub-regional soil backgroundlevels
Studies
Miami-Dade Studies 2001 – County wide natural background 2001 - Lime rock quarry material 2004 - Barrier Island Background Soil Concentrations Specific anthropogenic background 2002 - Golf Course Study 2002, 2003 and 2013 - Area wide atmospheric deposition – 3 formerincinerators Muck soils (various)
MDC COUNTYWIDE NATURALBACKGROUND STUDY(2001) 38 sampling locations (hardwood hammocks,pinelands, lowland) Undisturbed (natural) protected areas 0-2 feet interval Inorganics - 14 trace elements Arsenic - only element consistently exceed SCTLAvailable at rts.asp
Golf Course Study 5 public golf courses COC’s Inorganics and pesticides Arsenic only COC consistently aboveRSCTLMixing/Loading AreaPlay 5% UCL32.626.3N
AVENTURAMIAMI-DADE COUNTYBARRIER ISLANDS BACKGROUND STUDY(2004)INTER COASTAL WATERWAY 51 sampling locations (residential lawns)HAULOVER Inorganics onlyBAL HARBOR 0-1 foot and 1-2 feet intervals sampled In presenting the data the intervals werecombined if not statistically differentMIAMI BEACHDODGE ISLANDKEY BISCAYNEAvailable at rts.asp
MDC Background Concentrationof Trace Elements in Native QuarryMaterialQ4Q3Q2Q8Q1 8 sampling locations ( rock miningQ5quarries in MDC), 22 samples (from dragline bucket,stockpiled material and processedmaterial 13 inorganic. All results below RSCTQ7 Arsenic below detection in allsamples (MDL 0.2mg/kg)Q6Quarry sample locations
04Iron & ArsenicUT-6527Arsenic & Vinyl rsenicUT-515ArsenicHWR-566ArsenicSite Specific Background Studies
Former Incinerator1 Mile Radius Study AreasCity of Miami FormerIncineratorNW 20 ST & 12 AVE(40 sampling locations-20areawide, 2 0 residence) 0-6 and 6-24 inchinterval Metals, Dioxin andPCBsCity of Coral GablesFormer Incinerator2800 SW 72 Ave(10 samplinglocations) 10-53 locationssampled.City of Miami FormerIncineratorCoconut Grove(Jefferson St/Williams Ave)(53 sampling locations) Arsenic primarycontaminant ofconcern.
MIAMI-DADE COUNTYAnthropogenic Background
###################161Locationssampled and7reported#########################119 Parks#27 Private ########15 Public Libraries2 vertical intervals0-6 inches, 6-24 inches
COC’cMETALSPAH’sPESTICIDES*DIOXIN** 10% of samples analyzed for dioxin and pesticides
RESULTSArsenic and PAHs are the onlyCOC with concentrationsexceeding direct exposure SCTLChromium and Lead sporadicallyexceeded groundwaterleachability SCTL
MIAMI-DADE COUNTY ANTHROPOGENIC BACKGROUND STUDYSUMMARY STATISTICS(Contaminants with no exceedence of the Residential Soil Cleanup Target Level)Al0 - 6"Number of Samples 155Minimum84Maximum24700Mean2539MVUE251095% UCL3483DistributionNonP6 - 24"14781.327600233423452740LogNBa0 - 6" 6 - 24"1601472.10.5693.579.512.19.4211.919.1815.23 13.13NonPNonPFeNumber of SamplesMinimumMaximumMeanMVUE95% UCLDistribution0 - 6"15511914600262426293390LogN6 - 24"1475616100210821702510LogNCd0 - 6"1560.042.50.270.2838NonPCr6 - 24"1470.011.20.150.150.21NonPHg0 - 6" 6 - PNonP0 - 6"1571.2757.413.712.713.96LogN6 - 24"1470.5762.910.5210.611.97LogNMn0 - 6" 6 - 24"1471475.86136.62735535.153.935.961.243.3LogN LogNCu0 - 6" 6 - gNLogNPb0 - 6" 6 - 24"1601470.150.1515817625.516.9261631.220.4LogN LogNNiZn0 - 6" 6 - 24"1491464124923144.324.339.623.244.928.8LogN LogN0 - 6"1490.2512.12.32.22.9NonP6 - 24"1450.0912.72.12.12.7NonP
DATAEVALUATION
VERTICAL PROFILELAND USESPATIAL DISTRIBUTION
Kolmogorov-Smirnov Testo K-S statistic 2.03437o Approximate P value 0.000508435o Given P value less than 0.05, the conclusion is that there is significant difference between the two distributionsare at the 95% confidence level
Land Use Evaluation Parks vs Libraries vs ResidenceThere is a statistically significant difference amongst themedians at the 95.0% confidence level. Parks populationdifferent from libraries and residence Libraries vs residence:There is not a statistically significant difference betweenthe two distributions at the 95.0% confidence level.
Land Use Versus V ertical P rofile0-6" L6-24" L0-6" R6-24" R0-6" P6-24" P051015A rsenicL: Library, R: Residence, P: Park202530
Spatial Evaluation For this evaluation the county was divided into four quadrantsalong the north/south axis. Q1: Countyline Road to NW 135th Street Q2: NW 135th Street to West Flagler Street Q3: West Flagler Street to SW 88 Street (South Kendall Drive) Q4: South of SW 88th Street An evaluation of the data indicated a statistically significantdifference in the median concentration of the data set forsouth of SW 88th Street (Q4) vs the rest of the county.
Spatial Evaluationse nic S p a tia l D istrib ution N orth a nd C entralQ 1 6 to 2 4Q 2 6 to 2 4Q 3 6 to 2 4051015202530A rse nic (m g /k g )Kruskal-Wallis testTest statistic 0.546622 P-Value 0.760856Since the P-value is greater than or equal to0.05, there is not a statistically significantdifference amongst the medians at the 95.0%confidence level.Kruskal-Wallis testTest statistic 5.44012 P-Value 0.065870Since the P-value is greater than or equal to0.05, there is not a statistically significantdifference amongst the medians at the95.0% confidencelevel.
Spatial EvaluationNumber of SamplesMinimumMaximumMeanMVUE95% UCLTable 2: MIAMI-DADE COUNTY ANTHROPOGENIC BACKGROUND STUDYARSENIC SUMMARY STATISTICSArsenic- County-WideArsenic-North of SW 88 Street0 - 6"6 - 24"0-2 ft*0 - 6"6 - 24"0-2 .72.85.63.54.82.6Concentrations in mg/kgOutliers removed for data analysis* Weighted ConcentrationArsenic-South of SW 88Street0 - 6"6 - 24"0-2 17.9
7.0Figure 2aSpatial Distribution (0-6 inches)Arsenic Concentration* (mg/Kg)* MVUE** Sample interval 0-2ft (Naturally OccurringBackground Concentrations)
5.0Figure 2bSpatial Distribution (6 -24 inches)Arsenic Concentration* (mg/Kg)* MVUE** Sample interval 0-2ft (Naturally OccurringBackground Concentrations)
4.9**5.2Figure 2cSpatial Distribution (0-2 feet)Weighted Arsenic Concentration* (mg/Kg)* MVUE** Sample interval 0-2ft (Naturally OccurringBackground Concentrations)
Former Agricultural Sites Phase IIBackground data for the area south ofSW 88th Street compared to dataobtained from DERM’s recordsfor Phase II Environmental auditssubmitted for former agriculturalproperties located in south westMiami Dade County.
A r s en ic D is tr ibu tion S ou th of K e n daP h a s e II D a taKruskal-Wallis testTest statistic 0.19 P-Value 0.91Since the P-value is greater than or equal to 0.05,there is not a statistically significant differenceamongst the medians at the 95.0% confidencelevel.P a rk sA ll D a ta020406080A rs e n ic (m g /k g )Arsenic Distribution South of Kendall (6 to 24Kruskal-Wallis testTest statistic 6.2672 P-Value 0.043Since the P-value is less than 0.05,there is a statistically significantdifference amongst the medians atthe 95.0% confidence level.All DataParksPhase II Data0102030Arsenic (mg/kg)40
LAND USEVERTICAL PROFILEConcentration gradientOverall higher concentrations at 0-6inchesSoil concentration in soils fromlibrary sites consistently higher thanother land usesSPATIAL DISTRIBUTIONNo spatial trends observed
Vertical ProfileTable 3: MIAMI-DADE COUNTY ANTHROPOGENIC BACKGROUNDSTUDYBaPTE SUMMARY STATISTICSBaPTE0 - 6"6 - 24"0-2 ft*Number of 1.5Mean0.130.090.1MVUE0.140.070.1195% UCL0.20.130.13Concentrations in mg/kgOutliers removed for data analysis* Weighted Concentration
Land Use DataParksResidenceLibrary0-6 in6-24 in0-6 in6-24 in0-6 in6-24 .070.10.040.430.1995% UCL0.150.120.220.111.150.52% Exceed RCSTL16.89.216.66.66633Distribution Significant difference between data from libraries when compared to Parksand residences. The difference is indicated at both sampling intervals
Notwithstanding the background data just presentedit is critical to understand the site Historical land use and former sourcesHistorical aerials: former quarries or lakesFill sourcesAdjacent canals sediment qualityFlooding historyLithology of the site and surrounding areasElevation of the site and adjacent properties, roads, swales drainageCurrent use and potential sourcesHorizontal and vertical distribution of the chemicalsand so much more .
Report April 3, 2014Miami-Dade County releases background soil d-study.pdf
Presented by Wilbur Mayorga, M.S.,P.E., Chief Environmental Monitoring and Restoration D
WILBUR CURTIS WILBUR CURTIS WILBUR CURTIS FILLING . . . WILBUR CURTIS HEATING . . . WILBUR CURTIS READY TO BREW 2 BREWING INSTRUCTIONS 1. Brewer should be ON (Confirm at rear toggle switch, then press the ON/OFF button). Screen should read Ready-to-Brew. If connected to an InterLock grinder. Grinder should be on. 2.
Lengua castellana y Literatura II – 2º Bachillerato Dpto. Lengua castellana y Literatura - LA PRODUCCIÓN TEATRAL DE JUAN MAYORGA 2.1 LA CONCEPCIÓN DEL TEATRO DE JUAN MAYORGA 1. INTRODUCCIÓN: Mayorga concibe el teatro como espacio crítico de la realidad, como una escuela de la so
Coloquio informal sobre la intertextualidad Juan Mayorga, Ernesto Caballero e Ignacio del Moral 10. La escritura analógica en Madre Caballo Antonio Onetti 12. . mamos las últimas reflexiones de Mayorga acerca del asun-to para no dejarlo sin tocar,y porque además va a estar vol-viendo a aflorar de manera intermitente durante la charla]:
Any edition of these plays is acceptable EXCEPT that it must be Wilbur’s translation of Moliere: Moliere, Misanthrope and Tartuffe, Richard Wilbur translation (ISBN10: 0-15-660517-1) Moliere, School for Wives and Learned Ladies, Richard Wilbur Translation (ISBN10: 0-
Wilbur Wright College - One of the City Colleges of Chicago. 1. 2008-2010 Catalog. Wilbur Wright College. One of the City Colleges of Chicago. 4300 North Narragansett Avenue Chicago, Illinois 60634. Phone (773) 777-7900 General Fax (773) 481-8185. Humboldt Park Vocational Education Center. 1645 North California Chicago, Illinois 60647. Phone .
3. Act II, Scene 3, as translated by Wilbur, includes the word “tartuffified.” Dorine (to Mariane): You deserve to be tartuffified! Considering this word, which is not in the dictionary and has been created from Tartuffe’s name, create a definition for the term. 4. Do some research on the characters and styles in commedia dell’arte.
Every morning after breakfast, Wilbur walked out to the road with Fern and waited with her till the bus came. She would wave good-bye to him, and he would stand and watch the bus until it vanished around a turn. While Fern was in school, Wilbur was shut up inside his yard. But as soon as she got home in the afternoon, she would take him out and he
Electromagnetic compatibility (EMC) of automotive components is measured according to CISPR 25, substituting the vehicle environment with line impedance stabilization networks (LISN). Recent research shows that LISNs, developed for low voltage networks, are not ideal to measure conducted emissions of high voltage (HV) components because of changed characteristic impedances and additional .
