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Saturation Zone Instructions

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Biological Oxygen Compound + Plus™ (BOC+™)


The following instructions pertain to utilizing the calculation sheet for determining the amount of BOC+ required to be injected in the saturated zone and the related cost of BOC+.

This calculation sheet was developed so the user could enter input items in the appropriate yellow colored cells. Having made such inputs, they would automatically calculate the amount of pounds of BOC+ required and their related cost for each specific project. 

Enter the consultant's name, address, telephone number and other pertinent information.

Enter the project name, full description.

Enter the project location.
Having done the above, a record is made for the respective project.

Indicate the width and the length of the groundwater plume. By entering the width and the length, it is being assumed that the plume area is a rectangle. This is never the case where plumes usually radiate out from the source area. Therefore, be more objective to determine an average plume width and place in the respective cell.

Depth to contaminated zone.

Thickness of contaminated saturated zone should be an average, since at some locations the saturated zone contamination will be thicker or thinner.

Total porosity. Parameter Values, Grave l= 0.25, Sand = 0.32, Silt = 0.40, Clay = 0.36 or calculated values. Total porosity is based upon soil physical characteristics. The footnotes give a general description of porosity for average types of soil. To be more exact, effective porosity is used in the design calculations.

The effect of porosity is the interconnected pore volume or void space in a rock that contributes to fluid flow or a reservoir. Effective porosity excludes isolated pores and pore volume occupied by water adsorbed on clay minerals or other grains. Total porosity is the total void space in the rock whether or not it contributes to fluid flow. Effective porosity is typically less than total porosity and is utilized in the design calculations. 

  Fraction of organic carbon (foc) is a determination of the amount of carbon material Sorbed with the soil matrix. The foc is determined by laboratory methods and as a general rule surface soil = 0.006, subsurface soil 0.002 or site specific.

Hydraulic conductivity can be determined by field slug tests, pump tests or soil laboratory tests.

The hydraulic gradient is determined by field measurements.

Indicate chemicals of concern for BTEX constituents. Dissolved water phase oxygen demand. Determined by laboratory analyses. 

Indicate chlorinated solvent constituents that can be remediated aerobically.

Reduced metals. Determined by laboratory analyses.

Are added chemicals of concern and Stochiometric demand that can be added into the program.

Total petroleum hydrocarbons (TPH) can be used to determine the amount of oxygen required to remediate gasoline, diesel oil or grades of heating oil. Determined by laboratory analysis.

Chemical Oxygen Demand (COD). Determined by laboratory analysis.

Sorbed phase oxygen demand for chemicals of concern.

3 different approaches are shown to determine the lbs. of BOC+ required.  It is recommended that the approach that calculates to the greatest amount of O2 material required be used for the site remediation activities.

The user is required to insert additional oxygen demand factors in the yellow safety factor column these three categories are:

1. Individual chemical of concern for BTEX, MTBE, reduced organic metals, and VOCs.
If in the event the user requires additional chemicals of concern that are not displayed in the calculator contact BioRenova for assistance to the solution. 

2. Total Petroleum Hydrocarbons (TPH).

3. Chemical Oxygen Demand (COD).

The user chooses the category on which to calculate the lbs. of oxygen required and the related cost. The demand factors may be changed, if required by the user. The demand factors for each category are based on the degree to which each category provides a reasonable estimate of oxygen demand. For example, individual species as BTEX, MTBE, reduced inorganic, etc. (Category 1) are the most specific, least conservative measurement of oxygen demand, and COD (Category 3) is the most general, most conservative measurement of oxygen demand. The default additional demand factors for the each category is given in the following table. Although the default values summarized here have led to the design of many successful BOC+ applications, they may be modified based on the user's experience.


Demand Factor


BTEX components, MTBE,
Reduced Metals, etc.  

 5 to 8

Gasoline products contain over 200 additives, therefore this set of contaminants are underestimated and given a high demand factor of 5 to 8

Total Petroleum Hydrocarbons



TPH is given a demand factor of 2, because Total Petroleum Hydrocarbons is a term used to describe a large family of several chemical compounds that originally come from crude oil and does not include other chemical reactions that consume oxygen.

Chemical Oxygen Demand COD


 1 to 1.5

COD is a measure of the total amount of oxygen that reacts with chemical and biological agents in a sample under controlled conditions.  Due to the fact, sampling can cover different ranges; a demand factor of 1 to 1.5 is used.

For assistance or answers to any questions you may have regarding these instructions or the use of the calculators for slurry injection,  

Contact BioRenova, Services 847  - 791 - 7779