A method to minimize the overall cost from both a manufacturing and installation perspective for modular subsea chemical injection system comprising a power and communications module to be operatively connected to an umbilical that lacks a chemical delivery conduit, a power and communications umbilical terminator to be operatively connected to the umbilical where the power and communications umbilical terminator comprises a data communications port and an electrical power port, a power and communications module comprising a subsea electronics module operatively in communication with the power and communications umbilical terminator data communications port and further comprising an electrical power distributor operatively in communication with the power and communications umbilical terminator electrical power port, a fluid storage module operatively in communication with the subsea electronics module and the electrical power distributor and comprising a plurality of fluid storage bays adapted to selectively receive a corresponding plurality of fluid storage units where the fluid storage units comprise at least one high flow fluid storage unit and at least one low flow fluid storage unit, a pump module operatively in communication with the subsea electronics module and the electrical power distributor and the fluid storage module and comprising a plurality of pump bays adapted to selectively receive a corresponding plurality of pumps, and a fluid distribution unit in fluid communication with a pump module fluid port, the method comprising: a. providing an umbilical that lacks a chemical delivery conduit; b. operatively connecting the umbilical to the power and communications module and the power and communications umbilical terminator; c. disposing the fluid storage module on a seafloor adjacent to a well site, the fluid storage module configured to selectively provide low fluid flow requirement fluids and high fluid flow requirement fluids for an adjacent well disposed proximate the well site; and d. segregating low and high flow chemical delivery of fluids by populating a first pump bay of the plurality of pump bays with a high fluid flow pump and placing the high fluid flow pump into fluid communication with a high fluid flow fluid storage tank and by populating a second pump bay of the plurality of pump bays with a low fluid flow pump and placing the low fluid flow pump into fluid communication with a low fluid flow fluid storage tank; and e. selectively providing low and high flow fluid delivery by use of subsea storage and pressure boosting for low flow fluid needs and high flow fluid needs by using one of the high fluid flow pumps to provide high fluid flow and/or one of the low fluid flow pumps to provide low fluid flow. a. providing an umbilical that lacks a chemical delivery conduit; b. operatively connecting the umbilical to the power and communications module and the power and communications umbilical terminator; c. disposing the fluid storage module on a seafloor adjacent to a well site, the fluid storage module configured to selectively provide low fluid flow requirement fluids and high fluid flow requirement fluids for an adjacent well disposed proximate the well site; and d. segregating low and high flow chemical delivery of fluids by populating a first pump bay of the plurality of pump bays with a high fluid flow pump and placing the high fluid flow pump into fluid communication with a high fluid flow fluid storage tank and by populating a second pump bay of the plurality of pump bays with a low fluid flow pump and placing the low fluid flow pump into fluid communication with a low fluid flow fluid storage tank; and e. selectively providing low and high flow fluid delivery by use of subsea storage and pressure boosting for low flow fluid needs and high flow fluid needs by using one of the high fluid flow pumps to provide high fluid flow and/or one of the low fluid flow pumps to provide low fluid flow.