721 E MARINE VIEW DR 2016-01-01 MF Import

MEMORANDUM ^ Date: January 14, 1993 To: Melody L. Allea, Project Menager —� From: Robert Salisbury, Sqff Chemist Subjxt: Data Validation Review —. TPH-D Soil Da4 City of&vaett propused North_Eas� y�ew park, 03352-021-005 Tha data validaGon mvlew of 1 soil sample collxtad on Dacember 7, 1992 has been complUed. '('he sample was analyzed for to41 peqoleum hydrocarboos (TPF� in the di�el range by D&M IaboraWries (DBcM) located ia Pwluma� CaL`:omia. 1Le aoalysis was performed using method WTPH-D in accordance with Appeodia L of the Quidancxi for Remedia6on of Releases From Undarground Stonge Tanks (Wuhingtoa Department of _ EcoloBY. April, 1992). Summ�ries of the sample dah and labo�aWry QC �v �� provided by DBcM. '►7�e following samp�e�s a��y��R��,�oumbu(or accession number) 923530: _ le u ber D&M Number TP-3-1 30628 — The fallowing comments mfer to D&M's pedormance in meeting the quality control specifications describad in qppeod�z L of the Was6ingron DOE document 'Guidance for Remediation of Releases From Underground Storage Tanks,• April, 1992. I. Holding Time- Acceptable � J 2. Blenks - Acceptable J 3. Surrogate Recovery - Accep4ble 4. Laboratory Duplicate qnalysis ' The relative percent differcace(RPD)in the duplicate sample analysis was 2.15%. The method does not _, ��fY 9��►Y�o�ro1 limits for duplicate sample analysis, therefore the sample results were not qualified based , on results of the duplicate analysis. •_ 5. Repoded Detxtion Limits-Acceptable J 6. Type of Data Validation Review-Summary 7. Overal! Assessment of Data - The usefulness of tha data is based on the Ecology guidance documeat listed above. Upon consideration of the infarmetion prcseated above, the data are accepteble ezcept where Flagged with data qualifiers which modify the usefulness af the individual values.