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Standard Double-Wall detect the presence of a fittings are available on
<br /> Tanks liquid are used, the cavity made-to-order tanks.
<br /> between the inner and
<br /> outer tank may be either 2. Tank bottom deflector plates
<br /> vented to the atmosphere are standard under every
<br /> or sealed. manway and fitting.
<br /> c) Vacuum monitoring-when 3. All Model "P" tanks include
<br /> vacuum monitoring is used, a Fiberglas reservoir, used
<br /> the maximum vacuum is 3" for leak monitoring, integrally
<br /> mercury (1.5 psi maximum). constructed to the tank top.
<br /> Tank burial depth must not The reservoir includes one
<br /> Standard Double-Wall Tank exceed three feet. 41, NPT half coupling fitting
<br /> Specifications (61, NPT fittings for 10' dia-
<br /> d) Positive air.pressure meter tanks) mounted on
<br /> monitoring-when positive the top of the reservoir
<br /> air pressure monitoring is allowing access to the
<br /> used, the maximum air cavity between the inner
<br /> pressure is 3 psi. and outer tank walls.
<br /> Monitoring capabilities- e) Gasoline vapor sensors- 4. In addition to the monitoring
<br /> the following restrictions apply when gasoline vapor sensors fitting located in the Fiberglas
<br /> for the various types of double- are used,the cavity between reservoir, tanks 4000 gallon
<br /> wall tank monitors: the inner and outer tank capacity and larger include
<br /> may be either vented to the one additional monitoring
<br /> a) Hydrostatic Tank Monitor- atmosphere or sealed. fitting(40 NPT) located at
<br /> tank burial depth must not the tank top. Near the
<br /> exceed 7'from tank top to Standard Tank Notes manways.
<br /> finish grade. 1. Standard pipe fittings to the
<br /> primary tank are 4" NPT 5.Anchoring strap locations
<br /> The monitoring cavity must half couplings. All tanks are indicated by arrows on
<br /> be vented to the atmosphere. include one manway with, the side of the tank and on
<br /> The optional reservoir sensor, at least, three fittings to the the product drawings.
<br /> supplied by O/C TANKS, is primary tank located in the i
<br /> designed to automatically vent manway cover. All other
<br /> the monitoring cavity. primary tank fittings are
<br /> mounted on the tank. Addi-
<br /> b) Liquid sensors-when tional manways and tank
<br /> cavity monitors which
<br /> Number
<br /> of 4"NPT Number Cavity
<br /> Primary Approx. of 4" Spacing
<br /> Nominal Actual Number Tank Nominal Cavity Tank Between
<br /> Capacity Capacity o122' Fittings weight Volume overall Tank Monitoring'Inner and
<br /> Tank Model (Gallons) (Gallons) Manways (#/Tank) (lbs.) (Gallons) Length Diameter Fittings Outer Tank
<br /> DWr-4P(4) 550 550 548 1 4 650 100 - 6'8" 4' 1 14/8"
<br /> DWT-4P(4) 750 750 724 1 4 600 130 819" 4' 1 1.1/8"
<br /> DWT-4P(4) 1,000 1,000 971 1 4 950 160 1113" 4' 1 1-1/8"
<br /> DWr-2P(6) 2,500 2,500 2,385 1 6 1,800 210 127-1/2" 6' 2 1-1/8"
<br /> DWT-2P(6) 4,000 4,000 3,918 -1 8 2,500 310 1911-1/2" 6' 3 1-1/8"
<br /> •'D1M-2P(6) 6,000 6,000 5,997 1 6 4,600 420 2991/2" 6' 3 1-1/8"
<br /> DWr-2P(8) 6,000 6,000 5,929 1 6 3,400 370 195" 8' 3 1-118"
<br /> DWr-2P(8) 8,000 8,000 7,829 1 6 4,200 470 2513" 8' 3 1-1/8"
<br /> DWT-2P(8) 10,000 10,000 9,730 1 6 5,000 580 305" 8' 3 1-1/8"
<br /> DWT-2P(8) 12,000 12,000 11,627 1 6 6,000 630 363" 8' 3 1-1/8"
<br /> DwT-2P(10) 15,000 15,000 14,783 1 6 8,500 1,050 29'1" 10' 3 13/4"
<br /> DW7-2P(10) 20,000 20,000 20,168 . 1 6 11,000 1,360 38'3" 10' 3 13/4"
<br /> 'Includes fitting In Flberg/aa reservoir
<br /> •'The 6000 DWT.2P(6)Is standard at Mt.Union,PA plant only.At all other plants.OWT.2P(6)6000 model Is made to order.
<br /> . 1&0'a • 8"li
<br /> 1
<br /> Optional 42'Containment Calla
<br /> 3'T N10�
<br /> I
<br /> 61
<br /> 4-10
<br /> 41% o I 4116.68
<br /> d,u,� 2-=14
<br /> , 34" �44rA•
<br /> Madel 6WHP(41.550 61 Model M"(4}750 1'9"
<br />
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