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TABLE 9 <br /> VAPOR SAMPLE RESULTS <br /> 1766 MONTE DIABLO AVENUE <br /> STOCKTON, CALIFORNIA <br /> Spxknli��S}V\v t,a[ ,,.�., ao„a;t r��i`oE •,,oma ;iv'+�a`�. c , ,, a+,x o.�y a,,`� �t� va �i,+: k` }ia-,` `�a}`< <br /> tiga S\4 14,E4C.} `` WV''ti„k k\”} s a+V+aS#v4��,. S 4iji`0 4xc„M1;:'v }oxi �•` "` 4�; , {.;�}`v` <br /> MOMQ.+ S} icl.,, <br /> yi `Ar <br /> �� � 441tVVv >.i,x,+ SJr� 5} <br /> ' t'+*}Jtk t+,+rte + <br /> • ;* + l ;� tti iv',o x,` 4`'t�$a`'>� i V t� \ a�4�Vry a x v {,` + a`„xv ti a k <br /> Vapor <br /> A-0610-I1 2,700 60 45 71 23 NA <br /> A-0610-E1 530 14 30 <1 5 <4 5 NA <br /> A-0610-I2 3,800 69 61 10 37 NA <br /> Laboratory analyses performed by Matrix Environmental Laboratories <br /> Laboratory results of vapor samples reported in gg/l (parts per Billion) <br /> TPHg =Total Petroleum Hydrocarbons as gasoline <br /> TPHd =Total Petroleum Hydrocarbons as diesel fuel <br /> <1 5 = Less than the laboratory method detection limits <br /> NA=Not Analyzed <br /> 5.6 Aquifer Pump Test <br /> An aquifer pump test was performed to evaluate the hydraulic conductivity of the aquifer, <br /> groundwater flow and recharge rates, and an effective zone of capture for a possible groundwater <br /> PUMP and treat system Data collected during the pump test was used to assess the potential <br /> effectiveness of a pump and treat system to address groundwater contamination beneath the site <br /> Groundwater was withdrawn from the existing 4-inch, inner-diameter monitor well (MW1) using a <br /> submersible electric pump Groundwater depths were monitored in the 4-inch well and the three <br /> surrounding monitor wells using a data logger and four independent transducers, including two <br /> remote units <br /> Following the activation of the system at a pump rate of 2 5 gallons/nunute, groundwater in the 4- <br /> inch well was depleted in approximately I minute Recharge was relatively slow and was measured <br /> at a rate of approximately 0 3 gallon/minute Once the well had recharged to X80% of its static level, <br /> the pump was reactivated and set at approximately 0 25 gallon/minute The well pumped at a <br /> constant rate of approximately 0 25 gallon/hour for a duration of approximately 24 hours Drawdown <br /> stabilized at approximately 22 9 feet below ground surface (Figure FI) Drawdown was recorded <br /> in this well and the three other monitor(observation)wells Recharge was recorded in all of the wells <br /> for approximately 30 hours following de-activation of the electric pump (Appendix F) <br /> SEACOR 014-01-1 par <br /> 18 <br />