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<br /> 1 George's Service r •
<br /> Pilot Test Work Plan
<br /> effectiveness on a monthly basis. Ground Zero proposed monitoring these wells quarterly
<br /> which was approved by EHD in a letter dated September 26, 2014. Q
<br /> ' Quarterly influent samples will be collected and submitted to a California certified laboratory
<br /> for analysis of total petroleum hydrocarbons as gasoline (TPHg); benzene, toluene, 7 S �k
<br /> 1(Y�' t�� ethylbenzene and total xylenes (BTEX), methyl tert-butyl ether (MTBE) and 1,2- ( 'Y�
<br /> ' ( . �1(t' dichloroethane (1,2-DCA). If PID readings detect breakthrough at the intermediate sample I Zn
<br /> port, a sample will be collected to determine if carbon replacement is warranted. Lek
<br /> ' GROUNDWATER MONITORING
<br /> ' Current Quarterly Groundwater Monitoring and Sampling
<br /> The current groundwater monitoring regime is summarized below. Ground Zero recommends L^"
<br /> continuing this protocol.
<br /> First and Third Quarters
<br /> • Quarterly performance monitoring: MW-1, �-2, WOW-1 and OW-2,)i�
<br /> • Depth to water measurements: MW-1,MW , W8, 7WdW-2 dPwh
<br /> X-
<br /> �_ ✓bp • Groundwater analysis: M)9,1, M 2, OW-1 O �- -(TPH , BTEX, TBE and
<br /> 1,2-DCA by EPA method 8260132 44,fA,ov 7 n,
<br /> 9 7'
<br /> Second Ouarter
<br /> • Quarterly performance monitoring: MW-1, MW-2, MW-7,MW-101, OW-1 and OW-2 04
<br /> • Depth to water measurements: MW-1, MW-2, MVY-41 M -5, MW-7, MW-8, MW- W 7
<br /> W l, k
<br /> µ� 0 0W-1 and OW-2 -z2 -1' No tip �Ict,
<br /> W; � Groundwater analysis: MW-1, MW-2, MW-4, MW-5, MW-7, MW-8, MW-102, OW-1,
<br /> /t QW-2 and domestic well 1697 Durham Ferry Road (TPHg, BTEX, MTBE and 112-
<br /> No ? ,
<br /> ' /DCA by EPA method 8260B) Y,
<br /> Fourth Ouarter
<br /> ' . Quarterly performance monitoring: MW-1, MW-2,MW-7, MW-101, OW-1 and OW-2
<br /> Depth to water measurements: MW-1, MW-2, MW 2X MV`I-8, MW-101, MW-201
<br /> .�3�
<br /> MW-202, OW-1 and OW-2 � 32Ijo
<br /> ' • Groundwater analysis: MW-1,MW-2, MW-7,MW 18, OW-1 and OW-2 (TPHg, BTEX,
<br /> MTBE and 1,2-DCA by EPA method 8260B) ND 06
<br /> ' Future Quarterly Groundwater Monitoring and Sampling
<br /> Ground Zero proposed quarterly groundwater monitoring be conducted for one year and then
<br /> ' reduced to semi-annual monitoring which was approved by EHD in a letter dated September
<br /> 26, 2014. Beginning in the fourth quarter of 2015, Ground Zero proposes the following
<br /> modified schedule.
<br /> First and Third Ouarters `�� 7,c
<br /> Ground Zero Analysis,Inc. 3
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