geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Dilution attenuation factors for risk-based corrective action at Miami International Airport


, : Dilution attenuation factors for risk-based corrective action at Miami International Airport. American Water Resources Association Technical Publication Series TPS 2000-3(Pages 115-118

In 1996, the Miami International Airport (Airport) decided to pursue a risk-based corrective action (RBCA) approach to environmental cleanup required by a State Consent Order. A major component of the strategy was to develop Airport-wide Tier 3 (site-specific) cleanup levels, based on Airport-wide dilution attenuation factors (DAFs). DAFs are numeric values that represent the behavior of a chemical over time and space as it moves through the environment towards a human or ecological receptor. The DAF represents physical phenomena, such as dilution in an aquifer or volatilization in a surface water, and chemical changes, such as degradation. By incorporating an understanding of these phenomena into the cleanup approach, the Airport was trying to determine if it could take credit for natural cleanup processes, thereby saving money on active remediation techniques. The sitewide DAFs were developed using the most thorough understanding of the hydrogeologic conditions at the airport known to date, which included information from many historical and new field studies. Data used in the modeling effort indicated the following: 1) there are four distinct groundwater flow paths at the Airport; 2) groundwater gradients are highly transient due to multiple anthropogenic structures in the region, but in general are very flat; 3) there is little chemical migration from the shallow groundwater to the adjoining surface waters due to regional water management strategies that maintain artificially high surface water levels, and; 4) widespread petroleum releases have resulted in methanogenic conditions, which speed up the degradation of the chlorinated chemical releases. DAFs were developed for each of the four flow paths; chemical releases within a flow path must use the associated DAF. If accepted by the regulators, the resulting DAFs can be used to identify areas at the Airport where natural attenuation is occurring, and could help save the airport millions of dollars in remediation costs over the next ten years.

US$29.90


Other references

Aller, Mía-Angeles.; Arias, J-Luis.; Sánchez-Patán, F.; Arias, J., 2006: The inflammatory response: an efficient way of life. The successive pathophysiological mechanisms that develop in the interstitium of tissues when these undergo acute post-traumatic inflammation are considered increasingly complex trophic functional systems for using oxygen. The nervous or immediate...

Huang, X.; Zheng, X.; Xu, Z.; Yi, C., 2017: ZnO-based nanocarriers for drug delivery application: From passive to smart strategies. Due to the excellent biocompatibility as well as the low cost, nanoscale ZnO shows a great potential in drug delivery application. The richness of the structures, easy modification and pleasant properties of nanoscale ZnO make these materials reas...

Ellenwood, C.W., 1941: Bloom period and yield of apple. A 30-year record of the av. annual yield per tree and date of bloom is presented for 146 vars. of apple growing in the station orchards at Wooster, Ohio. Notes are given on the incidence of frost damage. The av. length of the blooming period noted...

Gol-Dfarb, D.M.; Kalinina, L.M., 1970: Forms of exclusion of the phage t 2 by the t 4b phage genome in escherichia coli k 12 lambda. Genetica (Dordrecht) 6(5): 100-110

Rodrigues, C.; Shetty, A., 2011: Newer methods for microbiologic diagnosis of pediatric infections. There are several advantages in making a specific diagnosis of an infectious disease. In addition to better patient care with appropriate therapy, once the diagnosis is established considerable financial expense is spared and preventive measures c...

Pintér, A.; Vajda, P.; Kroowand, L.; Farkas, A., 2005: Can epithelized neobladder-cutaneous fistula provide urinary continence?. The paper presents a case of a boy born with a bladder exstrophy, who underwent several surgical procedures, including bladder augmentation. During the last procedure, the patient received a suprapubic catheter that accidentally slipped out. The e...

Jacobus, L.M.; Mccafferty, W.P., 2002: Provanchers Quebecensis mayfly species. Examination of the lectotype of Ephemerella quebecensis shows it to be a junior synonym of Leptophlebia cupida (=E. quebecensis, n. syn.). Historical confusion and mistakes with respect to the dates of names and the possible equivalency of Ephemer...

Wilke, R.M.rschner, R., 1973: The development of sweet cherry production in the farms that belong to the cooperation association Thuringer Obst. Gartenbau 20 (2) 41-42

Poudyal, B.P., 2005: Poisoning: pattern and profile of admitted cases in a hospital in Central Nepal. This study retrospectively analysed all poisoning cases admitted to the medical and paediatric wards of Patan Hospital in Nepal between 1 January and 31 December 2004. A total of 154 cases were admitted, representing 0.8% of the total hospital adm...

Jayarao, B.M.; Oliver, S.P.; Tagg, J.R.; Matthews, K.R., 1991: Genotypic and phenotypic analysis of Streptococcus uberis isolated from bovine mammary secretions. Genotypic and phenotypic analysis of 42 strains of Streptococcus uberis isolated from mammary secretions of 17 cows collected at different periods of the lactation cycle and from episodes of clinical mastitis were performed. Seventeen restriction...