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r 4" _ L rn.."I — 7 42 ,......e.-.. ref paml 1 its - Water in pg/ L (Ppb) KT@TL-G4D7ZOR TOMIlLKm TPS � 4NIr�LK I.D. . - 6PA Method 5030/8020/602 (}J r 6PA Ma Shod 5030 and Modified PPA Method 80f ND COMPGnda Not Detected below Method DeGctt n LIMIts • LL MCL • -':ontaelnant Love'&. Drinking water 8t dard■ 5.0 EVAI-UnTION OF nEMEDIATIOM ALTERNATIVES A no -action alternative has been de ermined to bis unacceptable for this site based on the LUFT manual guidolines, and the RWQCB basin plan. Therefore, only the pump and treat remediat_.cn optiun has been considered. 6.0 PROPOSED GROUNDWATER nEMEDIAL ACTION PLAN 6.1 Design Criteria The primary design factor in the pum and treat system is the pumping rate required to establish hydraulic control of the contaminant plume. The ability to recover contaminants from the shallow groundwater zone is largely dependentupon the location and discharge. rates of the recovery well(s) and he total plume size. Once the sustainable system flow rate £o a recovery well system is established, it can be considered together with the chemical data to specify materials, size plumbing and determine treatment system requirements. RESNA/Waterwork Corp. conducted a series of constant -rate pumping tests at the site to evaluate hydrologic and well conditions, and provide baseline information for the design and operation of the remedial system. The testing pr gram comprised three separate elements designed to provide different types of information. The first element consisted of a brie period of static groundwater monitoring. This data was used to establish initial conditions and to aid the evaluation of the signi icance of water level changes observed during the later pumping tests. The second element of the test program consisted of three short term constant rate tests using well MW5. This series of tests provided information regarding the well productivity and efficiency. The Weber Point Property - 475 5 H2OMP791.TLP cu(Ei 19 1 .C- r i ik Knlf>7i TOrl Q W1wORI� (1) 41091-:rill�`]:5. '�`].7'� -- 4.2:- BW 640• 41091-MWI �dl'�.. •c 16 21 I�J9 4I091-4091-PWr X100 +•-6.6 . 37 • • 76 41091-MW4 ND 3.1 -1.4.-. 1' .4 +n600s 41091-MW5 ND ND KD ND PID PAIMARY Mn 1.0 40 30 20 Kk 6PA Method 5030/8020/602 (}J r 6PA Ma Shod 5030 and Modified PPA Method 80f ND COMPGnda Not Detected below Method DeGctt n LIMIts • LL MCL • -':ontaelnant Love'&. Drinking water 8t dard■ 5.0 EVAI-UnTION OF nEMEDIATIOM ALTERNATIVES A no -action alternative has been de ermined to bis unacceptable for this site based on the LUFT manual guidolines, and the RWQCB basin plan. Therefore, only the pump and treat remediat_.cn optiun has been considered. 6.0 PROPOSED GROUNDWATER nEMEDIAL ACTION PLAN 6.1 Design Criteria The primary design factor in the pum and treat system is the pumping rate required to establish hydraulic control of the contaminant plume. The ability to recover contaminants from the shallow groundwater zone is largely dependentupon the location and discharge. rates of the recovery well(s) and he total plume size. Once the sustainable system flow rate £o a recovery well system is established, it can be considered together with the chemical data to specify materials, size plumbing and determine treatment system requirements. RESNA/Waterwork Corp. conducted a series of constant -rate pumping tests at the site to evaluate hydrologic and well conditions, and provide baseline information for the design and operation of the remedial system. The testing pr gram comprised three separate elements designed to provide different types of information. The first element consisted of a brie period of static groundwater monitoring. This data was used to establish initial conditions and to aid the evaluation of the signi icance of water level changes observed during the later pumping tests. The second element of the test program consisted of three short term constant rate tests using well MW5. This series of tests provided information regarding the well productivity and efficiency. The Weber Point Property - 475 5 H2OMP791.TLP cu(Ei 19 1 .C- r i ik