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cation at the specified rate. The pump shall be operated by a separate power unit, or by the truck powerunit. It shall be equipped with a tachometer registering gallons per "' minute passing through the nozzles and rteadily visible to the operator, 'Suitable means for accurately indicating at all tiftes the temper-' atures of the primer “material shall be provided. The thermometer well shall be so placed as not . . 7 • I • • . - - uM , | tobe in contact. with a heating tube. The distributor shall be so designed that the normal width of application shall be notless than six (6) feet, with provisionfor. the application of lesser width when necessary. If provided with heating attachments the distributor shall be so equipped and operated that the primer material shall be circulated or agitated throughout the entire heating process. *' ’* * **’* ** ' ,***' ' • . •• ** '• ' *" ' . '? I ‘M* • - 1 (f) * Upon the prepared surface, asphalt primer shall be applied uniformly, as directed, at the rate of from twenty hundredths (0,20) to thirty hundredths (0.30) gallon per square yard, as directed by the Engineer, It shall be applied nnly -when the surface is dry or but Slightly damp and unless otherwise permitted by the Engineer when the air temperature in the shade is not less than 50°F. . . V In order to prevent lapping at the end junction of two applications, the distributor shall be promptly shut off and if necessary, to prevent dripping, a |drip pan shall be inserted under the nozzles when the application is stopped. Before continuing, apdication, building paper shall b e . Spread over t he'treated surface f or a sufficient distance back, so that the sprayers are operating at full force when the Untreated surface is reached. The building paper shall then be removed and destroyed, A hand spray shall be used to apply primer material necessary to touch up all spots unavoidably missed by the distributor.