Exhibit D - EPA INSTRUCTIONS v 1_1 rev 02232023.docx

Exhibit D

EPA INSTRUCTIONS

EPA INSTRUCTIONS: Adjustments to Contractor’s Unit Prices for Option Years

Economic price adjustment for changes in Fuel and Dicamba market pricing will be made in accordance with FAR52.216-4 and DFARs PGI 216.2 and instructions provided here. The price used to calculate Economic Price Adjustment (EPA) will be the Base prices at time of award for CLINs affected by EPA.

Pricing for option periods of CLINs on Attachment A, Price Schedule, shall be performed by as follows:

CLINs 1001, 2001, 3001, 4001 (Ranges) will be adjusted using Avgas pricing at Manhattan Regional Airport (http://www.airnav.com/fuel/local.html) for Self Service (SS) fuel price per gallon and Dicamba pricing quoted by Van Diest Supply Company (Abilene # 785-263-2664, email abilene@vdsc.com) for Dicamba price per gallon. Any adjustment to the unit price as a result in a change to fuel pricing will be determined by applying the fuel change to 20% of the unit price, regardless of aircraft utilized. Any adjustment to the unit price because of change in price of Dicamba will be determined by applying the Dicamba change to the entire unit price. Option Year adjustments to Ranges unit pricing will be modified into the contract from 1 to 4 weeks prior to issuance of task orders for Range Spraying (anticipated timeframe April).

CLINs 1002, 2002, 3002, 4002 (Noxious Weeds) will be adjusted using AvGas SS pricing at Manhattan Regional Airport for fuel price per gallon only. Any adjustment to the unit price as a result in a change to fuel pricing will be determined by applying the fuel change to 20% of the unit price, regardless of aircraft utilized. Option Year adjustments to Noxious Weeds unit pricing will be modified into the contract from 1 to 4 weeks prior to the issuance of a task order for Noxious Weed Spraying (anticipated timeframe May-June).

The contractor is not required to purchase Fuel at Manhattan Regional Airport or to purchase Dicamba from Van Diest Supply Company. These are simply indexes used to reflect actual changes to market pricing annually.

Explanation of Calculations:

• G = Price per gallon of SS Avgas at Manhattan Regional Airport, Manhattan, KS. The Base Year price used for calculations of economic price adjustments in the Option Years will be $4.32 per gallon. (Price at award)

• D = Price per acre of Dicamba at Van Diest Supply Company, Salina, KS. The Base Year price used for calculations of economic price adjustments in the Option Years is $36.40 per gallon. Weight per active ingredient per gallon of Dicamba is four pounds to the gallon. IAW with PWS requirements, application of Dicamba is 1/2 pound per acre and one gallon treats 8 acres. The Base Year price used for calculations of economic price adjustments in the Option Years will therefore be $36.40/8 per gallon = $4.55/acre. (Price at award)

• FG = Change Factor Fuel. Round to 2 decimal places. FD = Change Factor Dicamba. Round to 2 decimal places.

Steps to Calculations and Example:

(Example utilizes a $10.50 unit price for CLIN 0001, a $13.50 unit price for CLIN 00022, an Option Year fuel price of $5.15/gallon and an Option Year Dicamba price of $9.85/acre. These prices are used for example only to facilitate explanation of the EPA application.)

1. Determine the FG ratio (percent of change in fuel pricing).

Option Year price of fuel per gallon as reflected prior to Task Order issuance/ Base price of fuel per gallon ($4.99) Example: FG ratio = ($5.15)/$4.99) - 1 =.032 (percent of change)

2. Determine FG dollar amount for CLINs 1001 and 1002 and Option Years as exercised.

Unit Price x 20% = amount of unit price applicable to fuel adjustment. Amount of unit price applicable to adjustment x FG ratio = FG dollar amount of adjustment.

Example: Base Year Unit Price CLIN 0001 is $10.50 x 20% = $ 2.10. $2.10 x .032 = $ .07 increase (FG).

Example: Base Year Unit Price CLIN 0002 is $13.50 x 20% = $ 2.70. $2.70 x .032 = $ .09 increase (FG).

3. Determine the FD dollar amount for Dicamba adjustment for CLIN 1001 and Option Years as exercised.

Option Year price of Dicamba per acre as quoted prior Task Order issuance - Base price of Dicamba per acre ($7.99) Example: FD = ($9.85 - $7.99) = $1.86 increase in Dicamba price per acre (FD).

4. Determine the New Unit Price for CLIN 1001 (or Option Years as exercised).

Base Unit Price + FD + FG = New Unit Price Example: $10.50 + $.07 + $1.86 = $12.43/acre Unit Price for CLIN 1001

5. Determine the New Unit Price for CLIN 1002 (or Option Years as exercised).

Base Unit Price + FG = New Unit Price Example: $13.50 + $.09 = $13.59/acre Unit Price for CLIN 1002