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_ RttiiSlpNS i LABORATORY DRAINAGE SYSTEM DESCRIPTION The laboratory sinks within the fume hoods and the lab floor drains shall drain through an underground system that is connected to an underground stainless steel transfer tank. This tank is 3' x 3'-6p x 3'-6" deep with a 200 gallon capacity. The tank will sit flush with the sidewalk and have a removable metal cover. (� Itom o Within the tank are two automatic sump pumps operated by o m m L) float switches that discharge the chemical sewage to a 3,500 In N p gallon above-ground holding tank. wI I( H (D r0 = 3'x3'-S"x3'-S 11 DEEP Pump # 1 operates regularly. Pump # 2 is a unit that operates TRANSFER TANK W/ only as a backup sending a red light signal to the manager in U a ' SUMP PUMPS. •• •• Lab *I indicating a failure in Purnp # 1 requiring repair. W TO 3, 500 GALLON U Z O O p HOLDING TANK Same red light in Lab #1 is activated by a flow switch in the 3500 O N N _ _ . gallon holding tank when the some approaches full capacity. Y OWH All chemical sewage accumulated in the Holding Tank will be r- Z p H transferred to and disposed of at "Stockton Sanitary Sewerage Noo �- CHEMICAL. 12 5� Receiving", in accordance %vith their approved conditions. = J N _. H SEWER � �� - W Z ti1 , • F W - H cc _ _ �_ — IT - -:.: _ -__mow^-T _ _. Q Q ------ --- _ , Cc a Fij z ly{ _ 1 21 1 I__A t4 2 W LO D } .k p (n - _ W to AFFa r l 01 ;, I l SANITARY SEWER \ z \ T a Uj a \ ac w w En �' Ca CC LL \, = wu.. � a L) � o a L) \ ra F- L) \ r owu_ z \ 3 X W tom— © rF— \ U CC Lu x \ Q LA– CL LLL Uj H - \ ch o n in cn t1 - . \\ I 1, 200 GALLON I 1, 200 GALLON DISCHARGE TO SEPTIC TANK SEPTIC TANK �._ _ , � �S SEPTIC LEACH FIELD SCALE{ [] 1/S"�1 —nn DRAWN 5 SHEET NO SANITARY & CHEMICAL SEWERAGE PLAN SCALE! 1,/8" = 1 •--0" 2 . No OF SHE