Abstract: A system for dispersing a chemical in a surface water body includes an aerator device, having an injector positioned at a bottom of the surface water body; and a holding tank to store the chemical adjacent to the surface water body; and a metering pump connected to the holding tank, the metering pump having a computing device to program the metering pump; the metering pump is programed to inject an amount of the chemical to the injector at a rate; and the injector disperses the chemical throughout the surface water body.

Abstract: A method of determining a lawn treatment plan and delivering lawn treatments includes receiving at a user interface an address having a lawn. The method further includes determining an initial lawn size for the lawn based on the address. The method further includes receiving confirmation of the initial lawn size. The method further includes calculating a lawn treatment plan based on the initial lawn size. The method further includes providing the lawn treatment plan to a customer. The method further includes providing instruction for providing the lawn treatment plan to a fulfillment center. The method further includes delivering packetized lawn treatments according to the lawn treatment plan on a periodic basis to the customer for treatment of the lawn.

Abstract: Internally shielded fuel passage orifices in nozzle rocket swirler airfoils are sealed with the pressure test tool. Pinch clamps on the test tool are introduced into the fuel nozzle rocket swirler. The clamps are tightened over the airfoil orifices to plug or otherwise seal them and their fuel passages within the nozzle assembly. The nozzle assembly fuel passages are subsequently pressurized. Pressure is monitored to determine whether the nozzle is properly sealed (i.e., no pressure decay) or whether it has a leak-causing structural defect. Pressure drop in the tested component during the test cycle is indicative of a leak, in the nozzle's fuel passages, caused for example by a structural defect in the component. The test system may also be utilized in conjunction with individual rocket swirlers that are not incorporated within a complete fuel nozzle assembly.