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2220 S. Winchester Blvd (Underground storage tank) FIECEIVED APR - 2 0001 PUBLIC W01111 8 REPORT FOR FIRST QUARTER 2003 GROUNDWATER MONITORING City of Campbell 2220 South Winchester Boulevard Campbell, California 95008 Prepared for Mr. Bill Helms City of Campbell Department of Public Works Prepared by Sierra Environmental, Inc. April 1,2003 Project 02-130.05 f Sierra Environmental,Inc. Environmental Consultants April 1, 2003 Project 02-130.05 Mr. Bill Helms City of Campbell .Department of Public Works 70 North First Street Campbell, California 95008-1423 Subject: Report for First Quarter 2003 Groundwater Monitoring, 2220 South Winchester Boulevard,.Campbell, California Dear Mr. Helms: Sierra Environmental, Inc. (Sierra) is pleased to present this report summarizing the results of the first quarter 2003 ,groundwater monitoring evert which conducted at the subject property, hereafter, referred to as Site. Site location is shown in Figure 1. The monitoring event was requested by Santa Clara Valley Water District (SCVWD) in a letter dated August 12, 2002. The purpose of the groundwater monitoring is to confirm that no gasoline or diesel constituents have impacted groundwater beneath the Site. Sierra obtained and recorded groundwater data, and collected a groundwater sample from groundwater monitoring well (MW1) at the Site for chemical analysis. Sierra submitted the sample to Entech Analytical Labs, Inc. (Entech).of Santa Clara, California, for chemical analysis. Entech is an independent State-certified analytical laboratory (#2346). 1670 Newhall St.,Suite 212 Santa Clara,Ca 95050 Phone:(408)248-3700 Fax: (408)248-4700 First Quarter 2003 Groundwater Monitoring Sierra Environmental,Inc. 2220 South Winchester Boulevard,Campbell,California Page 2 BACKGROUND 'According to a letter prepared by SCVWD dated February 10, 1992, a 300-gallon fuel underground storage tank (UST) was discovered under the sidewalk near the Site during sewer pipeline installation in 1987. A report prepared by Geonomics, Inc. dated October 12, 1987, indicated that 8,800 parts per million (ppm) total petroleum hydrocarbons as gasoline (TPHG) and 490 ppm total petroleum hydrocarbons as diesel (TPHD) were detected in a soil sample collected adjacent to the UST pit at an approximate depth of 15 feet below ground surface (bgs). Soil type was recorded as gravel with brown silt. On October 12, 2000, Sierra's representative visited the Site to determine whether the UST exists at the Site. Sierra's representative observed a manhole on the sidewalk. In the manhole there was a 2-inch diameter filler pipe which indicated that the UST was left in place beneath the sidewalk. Grout seal was observed in the bottom of the filler pipe suggesting that the tank was filled and sealed with grout. To obtain subsurface data for the general area near the Site, Sierra's representative visited SCVWD and reviewed files for Rotten Robbie service station on October 16, 2000. This property is within 600 feet north of the Site. SCVWD has issued a case closure for this property on June 8, 2000. Boring logs for this property prepared by On- Site Technology dated August 18, 1994, documented silty fine sand from ground surface to 12 feet bgs. Clayey gravel with sand was encountered from 12 to 38 feet bgs. Sandy gravel with clay was recorded 38 to 78 feet bgs. Silty fine sand to fine sandy silt was encountered from 78 to 102 feet bgs. Sandy gravel was documented from 102 to 120 feet bgs. Groundwater was encountered at 109 feet bgs beneath this property. On July 23 and 24, 2002, Sierra drilled a 95 feet deep 8-inch diameter soil boring and converted it to a 2-inch diameter groundwater monitoring, well MW1 . Soil and groundwater samples were collected from the boring/well for chemical analysis. No gasoline or diesel constituents were detected in the samples. A report dated August 12. 2002, summarizes the field observations and the analytical results. On September 10, 2002, Sierra performed third quarter 2002 groundwater monitoring at the site groundwater information for this monitoring event is presented in table I. GROUNDWATER MONITORING On March 14, 2003, Sierra's field personnel measured groundwater level at MW1 (Figure 2), using an electronic sounder. Groundwater was measured at 81.75 feet below top of the well casing (TOC). First Quarter 2003 Groundwater Monitoring Sierra Environmental, Inc. 2220 South Winchester Boulevard,Campbell,California Page 3 Sierra's field personnel purged MW1 using a bailer. pH, temperature, and electrical conductivity of groundwater were recorded during the purging activities to affirm that groundwater in the well have stabilized. After completion of the purging, groundwater sample MW-1 was collected from MW1. After collection, the groundwater was transferred into a 40 milliliter clean volatile organic analysis (VOA) vials and a one-liter amber glass jar. The VOAs were sealed with Teflon-septum screw caps and the jar was sealed with a plastic screw cap. They were labeled, placed in a cooler, and delivered to Entech with chain-of-custody documentation. No petroleum hydrocarbon odor or sheen were detected or observed in the purged water. All sampling and measurement equipment were washed with Liqui-Nox° (a phosphate free laboratory detergent), and rinsed with tap water before and after field measurements and sampling activities. Purged and wash water were stored in a 55- gallon drum at a designated location at the Site. Sierra's quality control/quality assurance (QA/QC) protocol is presented in Appendix B. CHEMICAL ANALYSIS The samples were analyzed for total petroleum hydrocarbons as gasoline and diesel (TPHG and TPHD) using the United States Environmental Protection Agency (EPA) modified method 8015, and for benzene, toluene, ethyl benzene, and total xylenes (BTEX) and methyl tert-butyl ether (MTBE) using EPA method 8020. Certified analytical results and chain-of-custody documentation are presented in Appendix C. ANALYTICAL RESULTS No gasoline or diesel constituents analyzed for were detected in the groundwater sample. Table I presents summary of the analytical results. CONCLUSION AND RECOMMENDATIONS No gasoline or diesel constituents were detected in the groundwater sample collected from MW1 at the site, during this monitoring event. The underground storage tank was decommissioned at the site before 1987. Natural attenuation most possibly has biodegraded gasoline and diesel constituents in the soil beneath the tank. Shallow groundwater is approximately 85 feet bgs. No TPHG and TPHD constituents have been detected from the soil boring/monitoring MW1. Based on the above information, the site appears to be qualified as a low risk groundwater case described in California Regional Water Quality Control Board, San Francisco Bay Region " supplemental instructions to State Water Board December 8, 1995, interim Guidance on Required cleanup of Low Risk Fuel Sites". first Quarter 2003 Groundwater Monitoring Sierra Environmental,Inc. 2220 South Winchester Boulevard,Campbell,California Page 4 Please feel welcome to call us if you have questions. Very Truly Yours, Sierra Environmental, Inc. 4Q®'*s SIOk41 Afok � 3l_0� .� Reza Baradaran, PE, GE C c 14�`'��o� Principal OF tpi I J _ Mitch Hajiaghai, REA 11, CAC Principal Attachments: Table I - Analytical Results for Groundwater Sample Figure 1 - Site Location Map Figure 2 - Groundwater Monitoring Well Location Appendix A - QA/QC Protocol Appendix B - Certified Analytical Results and Chain-of-Custody Documentation cc: Ms. Grace Cheng, SCVWD (1 Copy) GWMR03-135.05\CityofCampbell\1 stQ03\mh04012003 TABLE I ANALYTICAL RESULTS FOR GROUNDWATER SAMPLES Sample Sample -Sample TPHG' `TPHp? Benzene lolue�e Ettaylbenzene Xytenes" �03 ID Location. Date. ;PPb¢ :Pp Ppi3 PPb" PPb PPb Ppb MW1 MW-1 7-29-02 ND ND ND ND ND ND ND MW1 MW-1 9-10-02 ND ND ND ND ND ND ND MW1 MW-1 3-14-03 ND ND ND . ND ND ND ND 1. TPHG = Total Petroleum Hydrocarbons as Gasoline 2. TPHD = Total Petroleum Hydrocarbons as Diesel 3. FO = Fuel Oxygenates; the groundwater sample collected on September 10, 2002, was analyzed for 7 fuel oxygenates using EPA method 8260B. The results were ND. The remaining groundwater samples were analyzed for methyl tertiary butyl ether(MTBE) using EPA method 8020. 4. ppb = Parts Per Billion 5. ND = Not Detected u N i! AV t! 1 4 SAY E 96 7p to MI. Fl BVf.KFOim w•° 'ua o"m+ � c _ W AV � � �p6T0Aif A < S �``b' ��+ go,r.m•�� q> to - ,�� ,1 `� : �> I o`s�� m B ,°wa u " rs t a ��„i�vu ra *! < x :+ ,• � vyt�a .. °' AV a 9 w I, a 4, +• � itWp s i ` .��s1)1 � w< ! tr c iFOPD tM pµ� '<j_L g A - �",°° o f� � • n 'Gttt� '�" rn ` Q yp S M1NNE50 � G� r . ' -S� $ g > '�w 8 "L Y ➢0. p ptsc �` FI IpE f TI. t� AV 8 7 0 _ ,>¢•b'6 7 t5o3DE ANZA: iS � < �� Q� 3 <y FLMW OA s 'f �'G � A4►1M1 �5 typo � M1J�' � A ' 9 ,'�. 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California prolect 02- �Nc. First Quarter ,Camp ENn Any givd. EN!11RON� outh Winchester SIERRA Enwronmen nsu 95050 222O S Suite 212,S 408 S2W'00 isphone[408]4h-3700 Fax[ LEGEND ® ' . MWi Groundwater Monitoring Well Location and Designation 0 Left-in-Place Underground Storage Tank Notes: MW1 was drilled within 3 feet south of the underground storage tank. it is 8"-diameter borehole,wich was converted to a 2"-diameter Sch.40 PVC groundwater monioring well. After completion,the well was secured with a locked cap and an 8"-diamter manhole. The well is approximately 95 feet deep. Sloted section is from 75 feet below the ground surface. 0 0 m w m W Q. 2220 Winchester Blvd. Michi Sushi Restraunt Yard MWi Paved Parking Area Sidewalk Sunnyside Avenue Approximate Scale: 1"=50' Groundwater Monitoring Well Location FIGURE SIERRA ENVIRONMENTAL, INC. Environmental Consultants First Quarter 2003 Groundwater Monitoring 2 1670 70New40Sttrite?' axanJseA5050 8 F 2220 South Winchester Blvd. - Campbell • California April 1,2003 roject 02-130.05 QA/QC PROTOCOL Groundwater Level and Well Depth Measurements Groundwater level and well depths are measured using electrical sounder. An electrical sounder consists of a reel, two-conductor cable, a water sensor, and a control panel with a buzzer. To measure groundwater level, the sensor is lowered into a well. A low current circuit is completed when the sensor makes contact with water. The current in the circuit is then amplified and activate a buzzer which produce an audible signal. Cable markings are divided at 0.05-foot increments. Well depths are measured to the nearest 0.01 foot. Groundwater levels are measured before and after sample collection to ensure data accuracy. Well Purging Low flow submersible electrical pumps or bailers are used to purge groundwater monitoring wells. Approximately 3 to 5 well casing volume of water is removed from the well as a measure to stabilize natural, and representative groundwater in each well. pH, electrical conductivity, and temperature of the purged water is measured and recorded at approximately each casing volume interval. Purge water is stabilized when pH is recorded within 0.5 unit, electrical conductivity is within 5 percent, and temperature is within 1.0 degree Celsius. Groundwater Sampling Groundwater samples are transferred into appropriate containers provided by certified analytical laboratories. The containers include proper preservatives, and labels with appropriate project information. Groundwater is transferred into the containers with as little agitation as possible. After collection, containers are sealed and checked to ensure that no head space or air bubbles are present in the sample. After collection, if required, samples are kept in a cooler to be delivered to analytical laboratory with chain-of-custody documentation. Equipment Decontamination All sampling equipment are washed with Liqui-Nox® (a phosphate free laboratory detergent), and rinsed with tap and/or tap water before each sampling event, and at each sampling interval. To reduce the risk of cross contamination, wells which have shown lower levels of contamination historically are purged and sampled first. Analytical Procedures Samples are analyzed by an accredited State-certified analytical laboratory using procedures prescribed by United State Environmental Protection Agency (EPA) and other Federal, State, and Local agencies. At minimum a field blank is analyzed with each group of samples for quality assurance measures. At minimum two qualified personnel review analytical results and compare them with historical data for consistency and accuracy. Field Reports All field observations are documented in field,reports. A field report contain project information, climatic condition, contractor/subcontractor information, field observation, discussions and communications during each particular field activity. Field reports are stored in appropriate project files. Project managers review field reports to obtain necessary information regarding the status of each project on daily basis. MAR.24-2003 18:05 ENTECH P.07i11 Entech Analytical Labs, Inc. 3334 victor Court + Santa Clara, CA 95054 + (408) 588-0200 + Fax (408) 588-0201 March 24,2003 Mitch 1:Iajiaghai Sierra Environmental,Inc. 1670 Newhall Street,Suite 212 Santa Clara,CA 95050 Order. 33656 Date Collected: 3/14/2003 Project Name: City of Campbell Date Received: 3/14/2003 Project Number: 03-130.05 P.O.Nurrtber: 03-130.05 Project Notes: On March 14,2003, sample was received under docurnentented chain of custody, Results for the following analyses are attached: ...'s'1a Test Method Liquid Gas/BTEX/MTBE EPA 8015 MOD.(Purgeable) EPA 8020 TP14 as Diesel EPA 8015 MOD.(Extractable) Chemical analysis of these samples has been completed. Stunmaries of the data are contained on the following pages. USEPA protocols for sample storage and preservation were followed. Enteeh Analytical Labs,Inc.is certified by the State of California(#2346). If you have any questions regarding procedures or results,please call me at 408-588-0200. Sincerely, Patti Sandrock QA/QC Manager Environmental Analysis Since 1983 MAR-24-2003 18:05 ENTECH P.08i11 -Enfech Analytical Labs, Inc. 3334 Victor Court - Santa Clara, CA 95054 * (408) 588-0200 - Fax (408) 588-0201 Sierra Environmental,Inc. Date: 3124/03 1670 Newhall Street,Suite 212 Date Received: 3/14/2003 Santa Clara,CA 95050 Project Name: City of Campbell Project Number: 03-130.05 Attn: Mitch Hajiaghai P.O.Number: 03-130.05 Sampled By: Mike Hajiagbai Certified Analytical Report Order ID: 33656 Lab Sample ID: 33656-001 Client Sample ID: MWI Sample Time: Sample Date: 3/14/2003 Matrix: Liquid Parameter Result Flag DF PQL DLR Units Extraction Analysis QC Batch ID Method Date Date Benzene ND 1 0.5 0.5 µg/L N/A 3/17/2003 WGC427825 EPA 8020 Toluene ND 1 0.5 0.5 µg/L NIA 3/17/2003 WGC42782B EPA 9020 Ethyl Benzenc ND 1 0.5 0.5 µg/L N/A 3/17/2003 WGC42782B EPA$020 Xylenes,Total ND 1 11 1 µg/L NIA 3/17/2003 WGC42782B EPA 8020 Surrogate Surrogate Recovery Control Limits N 4-Bromofluorobenzene 97.4 65 - 135 Parameter Result Flag DF PQL DLR Units Extraction Analysis QC Batch ID Method Date Date Mcthyl-t-butyl'Ether ND 1 1 1 µs/L NIA 3117/2003 WGC42782B EPA 3020 Surrogate Surrogate Recovery Control Limits(%) 4-Bromofluorobenzene 97.4 65 . 135 Parameter -� Result Flat; �DF PQL DLR [snits Extraction Analysis QC Batch ID Method Date Date TPH Lis Diesel ND I 50 50 µg/L 3/14/2003 3/18/2003 DW4324A EPA 8015 MOD. (Extractable) Surrogate Surrogate Recovery Control Limits(%) q-Terphenyl 102.0 21 - 142 _........:.... ................ — Parameter Result Flag DF PQL DLR Units Extraction Analysis QC Batch 10 Method Date Date TPH as Qasolinc ND 1 50 50 µg/L NIA 3/17/2003 WGC4278213 EPA 8015 MOD. (Purgeablc) Surrogate Surrogate Recovery Control Limits(%) 4-Bromofluorobenzene 91.8 65 - 135 DF=Dilution Factor ND Not Detected DLR=Dctcction Limit Reported PQL—Practical Quantitation Limit Analysis performed by Entech Analytical Labs,Inc.(CA SLAP#2346) —Patti Sandrack,QA/QC Manager ,Environmental Analysis Since 1983 MAR-24-2003 18:05 ENTECH P.09i11 Intech Analytical Labs, Inc. 3334 Victor Court * Santa Clara, CA 95054 • (408) 588--0200 • Fax (408) 588-0201 Quality Control Results Summary , QC Batch#: D'W4324A Units• ug/L Matrix: Liquid Date Analyzed: 3/14/2003 Parameter Method Blank Spike Spike Sample Spike QC Type %Recovery RPD RPO Recovery Result •Sample ID Amount Result Result Limits Limits Test: TPH as Diesel TPH as Diesel __ EPA 8015 M ND 1000 1056.68 LCS 10_5.7 51.7-126.0 Surrogate Surrogate Recovery Control Limits(%) .� 1 o-Terphenyi 104.0 21 - 142 1`est: TPH as Diesel. TPH as Diesel EPA 8015 M ND 1000 862.35 LCSD 86.2 20.25 25.00 51.7-126.0 r—� "'Surrogate Surrogate Recovery Control Limits(OA)V o-Terphcnyl 95.0 21 - 142 Environmental Analysis Since 1983 MAR-24-2003 18:05 ENTECH P.10/11 Intech Analytical Labs, Inc. pm� 3334 VjCtor Court • Santa Clara, CA 95054 + (408) 588-0200 • fax (408) 588-0201 Quality Control Results Summary QC Batch#: WGC42782B Units: µg/L Matrix- Liquid Date Analyzed: 3/17/2003 Parameter Method Blank Spike Spike Sample Spike QC Type %Recovery RPD RPD Recovery Result Sample ID Amount Result Result Limits Limits Test: TPH as Gasoline TPH as Gasoline EPA 8015 M ND 250 235, LCS 94.0 65.0-135.0 Surrogate Surrogate Pccovery Control Limits(%) � - Bromofiuorobcnzcne 80.0 65 - 135 Test: BTEX Benzene EPA 8020 ND 8 9.36 LCS 104.5 65.0-135.0 Ethyl Benzene EPA 8020 ND 8 8.65 LCS 108.1 6$.0-135.0 Toluene EPA 8020 ND 8 8.43 LCS 105.4 65.0-135.0 Xylenes,total EPA$020 ND 24 26. LCS 108.3 65.0-135.0 Surrogate -' Surrogate Recovery Control Limits(%) - - 4•13romof1wrobenzene 97.4 65 - 135 Test: TPH as Gasoline TPH as Gasoline_ EPA 8015 M ND 250 243.8 LCSD 97.5 3.69 25.00 65.0-135.0 Surrogate Surrogate Recovery Control Limits(e/0) T 4-Bromottuorobenzene $6.0 65 - 135 Test: BTE __. Benzcnc EPA 9020 ND 8 8.4 LCSD 105.0 0.48 25.00 65.0-135.0 Ethyl Benzene EPA 8020 ND 8 8.67 LCSD 109.4 0.23 25.00 65.0-135.0 . Toluene EPA 8020 ND 8 8.51 LCSD 106.4 0.94 25.00 65.0-135.0 Xylenes,lotal _ EPA 8020 ND 24 26.2 _LC:S1a 109.2 0,77 25.00 65.0-135.0 �- Surrogate Surrogate Recovery Control Limits(%) �_... 4-Bromofluorobenzene 96.3 65 - 135 Environmental Analysis Since 1983 SIERRA ENVIRONMENTAL,INC. -J ErAdrWWMfar coffiUmards Cr F-- 0 ca 7 1 Project Name: b�- \ project No: Date: Project Location: 2 2c> S. Client: Sampler: --3 Sample Date Sampling Matrix NR of Analysis Requested Turnaround Time ID Sampled Time Containers 8015J8020 8015 418.1 BTEX Fuel TPRO TPHD 7RPH 8020 xygenates BTEX,MTBE 62608 24-hQur Wxy -5 056,56-001 Other— formal 24-hour Normal Mer- 24-hour Normal Other- 24-hour Normal Other 24-hour Nomal Other— LLI Z24-hour Normal7 Ld CAW- 24-hour Normal Other Remarks. U) 01) in Ul' hod b Time Date Time Receflrvm b D. Y ro UJ CV 1670 Newhall St.-Suite 212•Santa Clara -California•95050 Phone(408)248-3700 a Fax(08)248-4700 Cl 3� SIERRA Fonin 104-02