PUBLIC LAWS-CH. 281 -JULY 15, 1939 Use of funds for test- ing laboratory, etc. Trees and parkings. Refund of erroneous collections. 43 Stat. 106. 50 Stat. 676. Provis. Availability. Exception. 43 Stat. 108 . From water reve- nues. Maintenance, etc., of aqueducts and ac- cessories. Meters on Federal services. Replacements, etc. Superintendence of Secretary of War not affected. No part of the appropriations contained in this Act shall be used for the operation of a testing laboratory of the highways department for making tests of materials in connection with any activity of the District government. For personal services, trees, and parkings, $26,840; For contingent expenses, trees and parkings, including laborers, trimmers, nurserymen, repairmen, teamsters, hire of carts, wagons, or motortrucks, trees, tree boxes, tree stakes, tree straps, tree labels, planting and care of trees, and tree spaces on city and suburban streets, purchase and maintenance of non-passenger-carrying motor vehicles, and miscellaneous items, $110,000; Refunding erroneous collections: To enable the Commissioners, in cases where motor-vehicle registration fees, motor-vehicle operators' permit fees, motor-vehicle title fees, motor-vehicle fuel taxes, importers' license fees, special assessments, or collections of any character have been erroneously covered into the Treasury to the credit of the special fund created by the Act entitled "An Act to provide for a tax on motor-vehicle fuels sold within the District of Columbia, and for other purposes", approved April 23, 1924, and the Act entitled "An Act to provide additional revenue for the District of Columbia, and for other purposes", approved August 17, 1937, to refund such erroneous payments, $1,500: Provided, That this appro- priation shall also be available for refunding such payments made within the last three fiscal years prior to the fiscal year for which this appropriation is made available: Provided further, That this appropriation shall not be available for refunds authorized by section 10 of the Act of April 23, 1924. WATER SERVICE The following sums are appropriated wholly out of the revenues of the water department for expenses of the Washington Aqueduct and its appurtenances and for expenses for Water Department, namely: WASHINGTON AQUEDUCT For operation, including salaries of all necessary employees, main- tenance and repair of Washington aqueducts and their accessories, including Dalecarlia, Georgetown, McMillan Park, first and second High Service Reservoirs, Washington aqueduct tunnel, the filtration plants, the pumping plants, and the plant for the preliminary treat- ment of the water supply, ordinary repairs, grading, opening ditches, and other maintenance of Conduit Road, purchase, installation, and maintenance of water meters on Federal services; purchase, care, repair, and operation of vehicles, including the purchase and exchange of one passenger-carrying motor vehicle at a cost not to exceed $650; purchase and repair of rubber boots and protective apparel; printing and binding; and for each and every purpose connected therewith, $478,700. For replacement of the filter strainer system at Dalecarlia; motor- ization of blow-off gate on the Dalecarlia conduit; installation of ventilating air-intake screens for the Dalecarlia hydroelectric station; procurement of portable electric pumping equipment for the city water tunnel; and for each and every purpose connected therewith, $63,000. Nothing herein shall be construed as affecting the superintendence and control of the Secretary of War over the Washington Aqueduct, its rights, appurtenances, and fixtures connected with the same and over appropriations and expenditures therefor as now provided by law. 1038 [53 STAT.
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