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_,. .__Plov 19 2004 4: 31PM Chapin Brothers Investmen 209 "64-6947 p. 4 <br /> • Installation o{addition' IAS points or wells to stimulate remediation of <br /> impacted ground wa er in the area of MW-4 <br /> May 10, 1999 Sparging,'Extraetion System operating and monitoring continuing <br /> Note, For technical in_rormatien=fie:d reports, :ab. Reports see AGE <br /> quarterly report dated March 1999 <br /> May 24& 25 1999iluly 20, 1999 five soil borings were advanced at the sae. <br /> Probe boring for soil confirmation were advanced at the area of the former USTs <br /> And a vacant lot 200 feet southwest of the former "1ST area. (For technical data <br /> we AGE September report <br /> December 29, 1999 Last quarter monitoring activities were conducted Site <br /> history and findings from previous investigations and monitoring events at the <br /> site are summarized in Problem Assessment Report(PAR)prepared by Science& <br /> Engineering Analysis Corporation(SEACORE)dated July 1994 and in Quarterly <br /> report- September 1995 prepared by AGE, :sated 03 October 1995 <br /> April 04, 2000 a meeting was held at the S. T,Count),Public Health Sem.ces to <br /> discass of the closure the sJtc. Representative of Age, Vz. Chapin, nu=mbers <br /> of the PHS-ehd and the Central Valley Regional Water Quality Control Board <br /> ('-VR WQCB) were present to detertnine site closure criteria and future <br /> requirements for remediation of the site. Re-initiation of the active soil and <br /> ground water rernediataon %vas directed vy the reguiatOry agencies. AVL'; Ileamade repairs to the remediation system and has collected a soil gas sample, All <br /> analysi6 was non-detect,however air-sparing was not activated, (See) Quarterly <br /> Report-second Quaver 2000 AGES for technical findings) <br /> September 15, 2000 AGE :ollected ground watm samples and soil vapor sa.-nples <br /> .or findings see Quarterly Report <br /> December 08, 2000 Ground water samples and soil vapor samples coLiected see <br /> finding see Quarterly Report Fourth Quarter <br /> June 08,2001 Ground water and water samples collected. See Second quarter <br /> 2001 for findings <br /> October 25, 2001 Well monitoring and Evacuetim, Ground water mLnples <br /> collected, See Third Quarter 2001 for findiag <br /> Between December 2001 and March 2002,three(3)ground water recover <br /> ells, a erounJd grater treatmentent svatem and associated pining wore instaAed <br /> March 2S.2002 InItanadon of ground water extraction pumas <br />