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' '!1 r fG ✓ 1_ kF i ,� ' • 7 , f <br /> ry '} ' i �,, . f 3 t r '+h +y s �-' t.. �.. ; •!. S -< ? i� y� 5 j,. <br /> 2Q Au ust-2001 i r <br /> 7 gif <br /> ",;AGE-NC Project No .95=011'4 <br /> ,f PageY5 of 9, <br /> 1 <br /> 23.6' Well Develo' ent Activities ' <br /> On-27 April' 2001, monitoring *ells MW-8 ,through MW=,10'and extraction wells EW-1 were m <br /> ' 1 developed utilizing a stainless steel hand bailer and a submmrsi, le:pump. ' <br /> Initially, a stainless steel',hand bailer was'utih ed to remove sediment,settled at the boitom`of each <br /> well'casing:'Following haiid bailing activities, groundwater was purged from each monitoring well: S <br /> ,utilizin 'a submersible" 'um ,,until'I groundwater was visually sediment,; ree;-a r.oximatel .40 <br /> gallons'ofwater.were removwi from monitoring wells MW-8;IYIW-9 and.MW-10'land approximately <br /> 150.gallons'ofWater were removed from extraction well EW=1;during developrrient. Purged ground <br /> water,was'containerized in. v ro erl labeled DOT-a roved`model'17H'55Y-gallon drums and was' <br /> • p P Y PP, <br /> stored'on-site in an area lacking public access.Monitoring well field logs for development activities <br /> ' . are included in`Appendix C.- <br /> 2.4.' ,.. <br /> : i <br /> ' 2.4.' MONITORING,WELL• PURGE PROCEDURES <br /> _On 02 May 2001, a Solinst water level meter was used oto measure the depth to ground water in well <br /> �. MW-l0'.relative to the top of the well casing.-After, ground water depth was measured, a pre- <br /> cleaned,two-stage submersible pump was used'to evacuate�water from well MW=10.-'10. <br /> 1.2 gallons 'of water (a minimum.of three casing=water volumes) were removed from the well.. <br /> ' Temperature, ;pH and conductivity.we're measured at 3-gallon intervals using a Oakton water <br /> analyzer: Purged water was stored in 55-gallon DOT=approv:.d druriis:c��i-situ.-Monitoiing well <br /> stabilization data and field data'sheets are included in Appendix C. <br /> COLLECTION OF GROUND WATER SAMPLES ; <br /> Aground water sample.was collected'from well MW-10 using.a new disposable bailer following <br /> purging of the well"'and recovery.of at•lcast 80%,of the pre-purge casing water volume: Irnmediately <br /> UP on retrieval, the sample was transferred into 40-ml-EPA-approved VOA via15?containing 0.5 ml ',- <br /> } of hydrochloric-acid(18%);as a sample`preservative; and was.labeled. The sample was'transported ; <br /> "in a chilled.container'urider'ehain-of-custodyao McCampbell Analytical Inc: {MCAT) a State of <br /> 'talif6mia'De artment of Health Services HS -cer ified,laliorato ., #1644 . The sample,was <br /> analyzed for aiialytes-listed,in Section2.3.2.. <br /> ' k advanced GeoEnvironmeatal,Inc <br />