Here you'll find answers to the most frequently asked questions, downloadable forms to help you manage your lease, and essential telephone numbers. In terms of maintenance, for heating and hot water, the contract is with TSG through the.How do I submit a maintenance request? To submit a maintenance request, please complete the online service request form. Middlesex Water offers municipalities, developers and small system owners a comprehensive suite of water and wastewater solutions. Create a maintenance agreement between two parties. Great for landlords and tenants. Water and Sewer Line Maintenance Programs (through a third party vendor). Contract Operations. An addendum application is to make corrections to a previously submitted ePlan site plan or subdivision application form.