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J n l . Quarterly Report - Third Quarter 2001 Local Food Store ` i 2650 Monte Diablo Avenue, Stockton, California- 1.0. INTRODUCTION t _At the request of Mr Liagat Khan of Local Food Store,Advanced GeoEnvironmental, Inc (AGE) --=has-prepared this quarterly report for Local Food Store, located at 2650 Monte Diablo Avenue, Stockton, California(the site) - _ -The scope of wdrk for this mvestigation included monitoring and saniplmg of four groundwater monitoring wells on 27 August 2001 and preparation of this report of findings The location of the --site with respect to its surroundings is illustrated in Figure 1 On-site structures, boring and monitoring well locations-are illustrated in Figure 2 ' This reporris I prepared in accordance with Central Valley Regional Water Quality Control Board guidelines for subsurface investigations of underground storage tank(UST) sites ' y -General background- information and data were presented in_Preliminary Evaluation -and - Investigation Report, dated 04 August 2000, prepared.by AGE 2.0. PROCEDURE_S The field activities were performed in accordance with the San Joaquin County Public Health $- - Services-Environmental Health Division(PHS-EHD)-approved Preliminary Site Assessment Work Plan prepared by AGE, dated 29 November 1999 - 2 1 GROUND WATER MONITORING ACTIVITIES _ —On 27 August 2001, a ground water monitoring event was conducted at the site The monitoring ' activities included the measurement of depths to the groundwater surface within wells and collection of ground water samples from the four monitoring wells - ' _ s—The water level m monitormg vaells MW-1-through MW-4 was measured relative to the tops of the well casings using a Sohnst water level meter-After water levels were measured, each well was - - -purged utilizing a disposable bailer or 2-,stage pump Six gallons (a minunum of three casing-water volumes) of water were removed from wells MW-1, MW-3 and MW-4 and twenty-two gallons-of water were removed from well MW-2 -Temperature, pH and conductivity of the purged water were measured at two-gallon intervals for MW-1, MW-3 and MWT4 and at five-gallon mtervals for MW-2 Temperature, pH and conductivity _ -