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System Monitoring(January 1994 -July 1995} 141 N.fti Dorado Avenue,Stocictan, CA Sail VOM Systent with Granulated Activated Carbon Air Permit to Operate Conditions MWL Aiitlowrate=200 CFh.� ., Max TPH Dont. =32 ppmv(gasoline)Or 168 ppmv(methane) Date well Fresh sac Vapor AVibw Pis Airlbw Arnow TM cawafteu ri Bene a TPH TPH TPH Cunt TPH Opento AirVaMw E*adion PSMUM (W-W (avp.) Inrl,ena li kW9 EYf nt Exnm5an Exlracftn vbr" Ccndiiori Vacuum Tei yr Vabdty Estiiiiale piassua (4 in.pipe) (ROx q) (LAS) (LAB) (RD) (FID) (LAS) (LAS) COMMaft QrL H2O H2O ACFM SCF M 1R/94 VEw-12,3 4 Closed -45 82 0.11 117 114 140 99 a03B 3.6 1167 127/94 VEW-12.3.4 closed 3n7J94 VEw-123.4 closed .40 75 016 141 140 207 110System sIPA down(127/94) ND(<016) 0 93 49 lt67• Restarted system(3117194) 415194 VEW -12.4alter GAC mplacemeriL dosed �0 103 a!5 140 13,2 m 85 No(<o te) 0 39 3.6 1247 4119194 VEW-1.2,3.4 closed -40 109 0.16 145 133 160 9.8 69 5/3194 VEW-12.3.4 closed .45 104 014 133 121 30 68 0.19 1 12 2,8 1337 5117194 VEW-1.2.34 clpsed .43 101 015 139 127 BO 57 ND(C008) 5.B 3.3 2.3 1373 611/94 VEWW-12.3.4 closed -43 117 014 137 1213 44 51 a41 1.2 1B 21 1406 6/13194 VEW-12,3.4 closed -43 117 014 137 121? 40 1 1:6 6/13-716!94 System shutdown(&13-7/8/94)3-718194)for 7111194 VEW-12.3 4 WV-3rerrs�ffion system mod�icatim ��Dorsi �1 74 0.6 153 151 56 24 ND(c016) 7 27 12 r 1406' 823194 VEVIr-1.2.3.4,MWW3 PW'*q en -13 83 024 97 95 40 45 ND(4.016) 0 12 14 1462 WDS4 VEWIF12A4.1AWWr3 clow ,W 114 0-16 146 135 38 45 ND(cOA16) 0 !.6 1.9 1508 10J41S4 VEWW=12.3.4 MW-3 clow .38 106 016 145 131- 25 34 ND(<O 016) 0 !-! 1.5 1532 11/16194 VEWW-t.2.3.4.MW-3 closed -W 119 015 142 130 11 94 ND(<0.016) 0 0.5 04 1513 1129-MGM 120064 VEW1�1,2.3.4.MWW3 clO �g 119 015 142 t3C System shut down due to 37 ND(<0 0$0) 1.5 1580 elec4rical prOdem Ort control t13O196 VEWIr•12.3.4,MW3 c -W 107 014 135 12B 20 12 ND(40 016) 0 0A a5 1603 panel(1 125-12116194) WA15 VEVV-1,2.3.4 MWW3 closed .43 106 0.14 135 t8 ND(<0A16) 0 04 O 6 160722M 21 195 1616 Shut down systemdad putsing 31995 VEW11r12.3,4.MW3 clow -W 112 0.15 141 131 18 12 0.038 0 OB 1616 Restarted System 322195 VSV-12.3.4.i1AW3 c(osw 14 Shut down system after mon tormg 4110195 VEW-12A4.MWW3 closed -40 119 012 127 !t6 38 15 ND(<0 016) 0 9.4 06 1624 Restarted syStem sampled after app 1 hr. 425195 VEW=12,3.4 MWW.3 cls is Shut down system alter mOndanng 5111195 VEWW-1.2.3.4.MW3 Cfosed .40 80 014 132 130 10 9.9 ND(-c0 016) 2 0.4 04 1632 Restarted system.sampled after app t hr 52m VEW -1,Z3,4A WV3 closed 11 5 Shut down system after monitoring 617195 VEW-1.2,3.4.MWY3 closed 75 014 132 131 t6 12 ND(-c0 016) 8 a7 OS 1640 Rested system, sampled after app 1 hr gram VEW-I.2.3.4.MW3 closed 14 4 Shut down system after monitoring 71.3195 VEWIr:1,2.3 4 MW.3 closed 38 87 014 133 129 25 t6 ND(co 016) 0 1 07 1 1648 Restarted system, sampled after a 1 hr Notes System cOnsi$ts of orae WeramtIve blower with 5 hp motor and two 2000 lb GAC units in series (Unit 1 and Unit 2) System start-up ams conducted by AegM ErMrOnM ntal(naw Fugro West. Inc)on 623193 System was previously Operated by Resna Industries. erg. =BVeM a Of three sets Of measurements COlWcW at 15 minute intervals GAC=granular achvated carbon I Alitlow,measured betimm Carbon Unit 1 and Unit 2 except on 7/11/94 and 8M01 AMlow measured at the vent well manifold on 7111194 and 823194 Indent=prior to Unit lfsoil vent blower dMCtmrge ©Ruent=Unit 2(atmcsptrertc discharge) TPH=total petroleum hydrocarbOm as gasoline ppmv=parts per ni ion by volume RD-field measurement from name 1011matiOn detect calibrated to hexone(MOdel C w"OVA 128 by Foxboro Company) LAB=laboratory analysts ND=not detected at indicated repaft rmdt ACFM=actual cubic feet per minute 9CFM= r-';, ', cubic feet per minute(at 29 92 inches mercury, and 70 deg. F) See attached eidracbari rate calculation Cumulatrve extraction is Calculated by averaging extraction rates for consecutive sampling events and summing up previous total *Cumulative TPH extraction calcutatioons do not include TPH extraction between 1/7-127194&7/8-7111194 ` For cumulative TPH extras calculation after 1213(tM 4, system operation hours are estimated based on field observations i