WORK PLANS - Laserfiche WebLink

Home Browse Search

ATC Associates Inc. 1117 Lone Palm Avenue,Suite 201 1 Modesto,California 95351 209-579-2221 (:VYAC C. g s s o c t . r e,a; r. i .c ., fax:209-57962225 Report Preparation Upon completion of the-field activities, a report will be prepared describing the field activities r� . and laboratory analytical results. The report will include a detailed summary of the subsurface investigation and contaminant distribution, both in soil and groundwater. The .report will be prepared in general accordance with SJCEHD reporting guidelines and will include recommendations as appropriate. All work described in this workplan will be.performed under the. direction.of a California Registered Professional Engineer or California registered Professional.Geologist. A copy of the f soil boring permit application will.be provided under separate cover. Proiected Schedule Once approval of this workplan has been received, ATC will initiate the permitting process with the City of Tracy and confirm a schedule for drilling activities. ATC will notify the SJCEHD at least 48 hours prior to beginning any field activities. The summary report will be submitted to the SJCEHD approximately 60 days after the completion of field activities. { Resolution No. 2009-0042 Since the State Water Resources Control Board (SWRCB) adopted Resolution No. 2009-0042 in 2009, the SJ EHD has provided a reduced sampling schedule and list for chemical analyses in order t kLt t e resolution. The reduced sampling schedule provided by the SJCEHD was based on a recent reduction of MTBE concentrations,in groundwater samples collected from the existing groundwater monitoring well network. ATC generally concurs with the reduction of the sampling schedule. Prior to the resolution, .wells MW-1, and..MW-4 through MW-8 were sampled on a quarterly schedule, while wells!MW-2 and MW-3 were sampled on an annual schedule. The new sampling schedule request for wells MW-1, MW-4, MW-5, and MW-8 to be sampled semi-annually and wells.MW-2, MW-3,MW-6, and MW-7 sampled biennially. I Chemical analyses of the groundwater samples. should include TPHg or GRO utilizing EPA Method 8015B; and BTEX, MTBE, TBA, and TAME utilizing EPA Method 8260B. The SJCEHD did not previously include BTEX;.however, it is 'in ATC's.opinion that ahe.BTEX constituents are, necessary .fol• chemical.analysK—Thd laboratory analyses for BTEX will not result in,an'increase of project costs. i t I i SAEnvironmenta1\25847\37 Tracy\Reports\Response 2009 Aug.doc 7 r