Fact sheet: EPA to install groundwater monitoring well in ...

SFUND RECORDS CTR149366

EPA San Gabriel Valley SuperfundSites, Area 3, May 2003

U.S. Environmental Protect ion Agency • Region 9 • San Francisco, California • May 2003

EPA to Install GroundwaterMonitoring Well in the City of San Gabriel

Project is part of continuing investigation of area groundwater quality

Figure 1: PlannedFieldwork - Locations ofproposed groundwatermonitoring wells

Figura 1: Planes detrabajo - Ubicacionespropuestos para los pozosde monitoreo del aguasubterranea

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* PROPOSED QROUNDWATERMONITORING WELL LOCATIONS

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The U.S. Environmental Protection Agency (EPA) will install a well this spring in the City ofSan Gabriel as part of a continuing effort to study the extent of groundwater contamination in thearea. This project will not expose people living or working near the drilling sites to contaminatedwater or to hazardous chemicals. This fact sheet informs you of our planned activities and de-scribes EPA's investigation and cleanup of groundwater contamination in Area 3 of the San GabrielValley Superfund sites.

Continued on pg. 2

San Gabriel Va l ley , Area 3 Super fund Si tes

San Gabriel Valley Area 3 GroundwaterMonitoring Well Installation Project

Work schedules. EPA will drill one moni-toring well on Junipero Serra Road near SanMarino. It will take five to six weeks to completethe project. The drilling contractors will gener-ally work between the hours of 7:00 a.m. to 7:00p.m., with all noise intensive activities ceasing by5:00 p.m. Due to geologic conditions, somework will occur up to 24 hours per day at times.

Equipment on site. The drilling crew willuse a truck-mounted drilling rig to install the

wells. Safety barriers and sound-reducingblankets will enclose the drilling location(photo, back page).

Security and convenience. The drillingsites will be patrolled during non-work hours.EPA, in cooperation with the City of SanGabriel, will work to minimize equipmentnoise and traffic disruption. EPA does notexpect any disturbance from ground vibrations.

Continued on pg. 9

For More Information

Information Repositories. EPA provides general information on the Superfund Program, as well ascopies of fact sheets and technical documents on the San Gabriel Valley Operable Units, at thelocations below.

Alhambra Public Library410 West Main StreetAlhambra, CA 91801(626) 570-5079

West Covina Library1601 West Covina ParkwayWest Covina, CA 91790(626) 962-3541

Superfund Records Center95 Hawthorne Street, Room 403 (SFD 7C)San Francisco, CA 94105(415)536-2000

Rosemead Library8800 Valley BoulevardRosemead, CA 91770(626) 573-5220

Information is also available on EPA's web sites at http://www.epa.gov (EPA Headquarters homepage), http://www.epa.gov/region09 (EPA Region 9 home page), and http://yosemite.epa.gov/r9/sfund/overview.nsf/ (Superfund site overviews).

ContactsEPA: Lisa Hanusiak, Remedial Project Manager (415) 972-3152

Don Hodge, Community Involvement Coordinator (415) 972-3240Toll-free (English and Spanish) Community Involvement Office message line: (800) 231-3075

Local: City Engineer, City of San Gabriel: (626) 308-2800 x715Media: Mark Merchant, EPA Southern California Press Officer: (415) 947-4297

MAY 2003

San Gabriel Valley Area 3de Pozos de Monitoreo

Horario de trabajo. EPA perforara unpozo de monitoreo en la calle Junipero SerraRoad cerca de San Marino. Tomaraaproximadamente de 5 a 6 semanas paracompletar el proyecto. Los contratistastrabajaran generalmente entre las horas de 7:00a.m. a 7:00 p.m., pero las actividades masruidosas estaran cesando a las 5:00 de la tarde.Por condiciones geologicas cierto trabajoocurira hasta 24 horas al dia a veces.

Equipo en el sitio. El equipo usara unaplataforma de perforation montada en camionpara instalar los pozos. Barreras de seguridad ymantas para reducir ruido estaran rodeando lalocalization de perforation (vea la foto en laproxima pagina).

Proyecto de Instalaciondel Agua Subterranea

Seguridad y convenencia. El sitio deperforation estara patrullado durante lashoras que no se trabaje. En cooperation conla cuidad de San Gabriel, la EPA tratara dereducir el ruido del equipo e interruptionde trafico. EPA no anticipa inconvenienciasde vibraciones de tierra.

Resultados. Al terminar constructiondel pozos EPA tomara las primeras muestrasdel agua subterranea de los pozos ycontinuara tomando muestras cada 4 mesesdurante 2 afios por lo menos. EPA tendralos resultados disponibles para el piiblicopor medio de boletines informativos, juntocon otros documentos del proyecto, en los

Para Mas InformacionEPA proporciona informacion general sobre el Programa Superfundo y copias de hojas informativas ydocumentos tecnicos sobre las unidades de operacion del Valle de San Gabriel en los siguientes locales:



Superfund Records Center95 Hawthorne Street, Room 403 (SFD 7C)San Francisco, CA 94105(415)536-2000

Rosemead Library8800 Valley BoulevardRosemead, CA 91770(626) 573-5220

Puede encontrar informacion en las paginas del red de EPA en: http://www.epa.gov (pagina principal de laoficina central de EPA), http://www.epa.gov/region09 (pagina central de la Regi6n 9 de EPA), http://yosemite.epa.gov/r9/sfund/overview.nsf/ (vision de conjunto de sitios del Superfondo).ContactosEPA: Lisa Hanusiak, Gerente del Proyecto Correctivo (415) 972-3152

Don Hodge, Coordinador de Participaci6n Comunitaria: (415) 972-3240.Llamandas gratuitas (ingles y espanol) a linea de mensaje de la oficina de participationcommunitaria de EPA: (800) 231-3075

Local: Ingeniero de la Cuidad de San Gabriel: (626) 308-2800 x715Medios de comunicacion: Mark Merchant, Oficial de Prensa de EPA del sur de California: (415) 947-4297

San Gabriel Val ley, Area 3 Super fund Sites

repositories de infbrmacion nombrados en lapagina 3 de esta hoja infqrmativa.

Contaminacion del Agua Subterranea enelValle

El proyecto de los pozos de monitoreo delArea 3 es parte de un esfuerzo mas grande paraproteger el abastecimiento de agua del Valle deSan Gabriel. El acuifero de la cuenca de SanGabriel proporciona aproximadamente 90% delabastecimiento de agua domestica para mas de unmillion de residentes del Valle de San Gabriel.En 1984 la extensiva contaminacion del aguasubterranea con quimicos industriales incita laEPA a agregar 4 areas en el Valle de San Gabriel(Areas 1 a 4) a la Lista Nacional de Prioridadesde los sitios de desechos mas contaminados delpais. El Area 3 incluye partes de las ciudades deAlhambra, San Gabriel, Temple City, SanMarino, South Pasadena y Rosemead. Lacontaminacion del agua subterranea es elresultado de decadas de uso y practicas de ladisposicion que lanzaron compuestos organicosvolatiles (VOCs) en la tierra y el aguasubterranea. Se utilizan comunmente VOCs en lalimpieza en seco, el pelar de pintura, el chapadode metal, y el desengrasar de maquinaria. Loscontaminantes encontrados en el Area 3 incluyenlos VOCs tricloroetileno (TCE) y tetrachloroeth-ylene(PCE).

Aunque hay contaminacion, los provedoresde agua del Valle de San Gabriel contimianproveiendo agua limpia a los clientes, cerrandopozos en areas contaminadas, con tratamiento delimpieza para remover los contaminantes,mezclando el agua para alcanzar estandares delagua potable, y obteniendo el agua de vecinosprovedores o utilidades.

c,Esta segura mi aguapotable?

jSi! Todael aguaproporcionada por utilidades ~" de agua enlas comunidades del Valle de San Gabrielcumple con los estandares federales yestatuales de agua potable.

Investigacion Correctiva y Estudio deViabilidad del Area 3

Despues de agregar los sitios del Valle de SanGabriel a la Lista Nacional de Prioridades, EPAcomenzo un esfuerzo que se llama laInvestigacion Correctiva/Estudio de Viabilidad(RI/FS) para determinar el tipo, la extension dela contaminacion de la tierra, el agua subterraneay el potencial de dano al piiblico, para identificarfuentes de contaminacion, para desarrollar unplan de prioridades de limpieza, y paradesarrollar alternatives para limpiar lacontaminacion.

EPA comenzo el RI/FS para el Area 3 en1999 y ahora esta buscando fuentes decontaminacion por toda el area. Varias companiashan completado pruebas de gas de tierra y estancomenzando pruebas del agua subterranea paradeterminar el potencial de contaminacion delagua debajo de sus instalaciones. El pasosiguiente, segiin notado arriba, es instalar lospozos de monitoreo del agua subterranea paracolectar datos que determinaran el grado decontaminacion y la relacion a las fuentessospechadas en el area. EPA, en cooperacion conla ciudad de Alhambra continuara trabajandopara asegurar la proteccion del agua subterraneay la proteccion del piiblico del Valle de SanGabriel.

MAY 2003

Dtf An B&o Gi£ng Kilm Tra Ntfdc NglmKhu Vtfc 3 vung San Gabriel Valley

Ljch trtnh cdng ta"c . EPA se dao motgieng kiem tra tai Junipero Serra Road gan SanMarino. Se mat khoang nam tdi sau tuan dehoan tat du* an nay. Cac nha thau dao giengthtfdng se lam viec tu* 7 gid sang tdi 7 gid toi,va tat ca cac boat dong gay on nhieu se ngufngtrtfdc 5 gid chieu. Do cac dieu kien dia ly doikhi ho co the lam viec tdi 24 gid mot ngay.

Thitft bi tai cdng trtfdng. Toan khoangieng se dung thiet bi khoan gan vao xe tai dedat gieng. Chung toi se raokhu vrfc dao giengbang cac ta'm cha'n giam thanh quanh khu vtfckhoan gieng va dat cac chrfdng ngai vat an toan(xem hinh, trang mat sau).

An toan va thu$n tifn. Cac dia diemdao gieng se dtfdc tuan tra trong cac gid khonglam viec. EPA se cung phoi hdp vdi Thanh Pho'San Gabriel de giam thiet tieng on cua thie't biva gian doan giao thong. EPA du" doan khu vifcdo se khong bi quay roi do dat rung.

K£ft qu£. EPA se lay cac mau nrfdc ngamdau tien tu" cac gie'ng mdi sau khi hoan tat vasau do se lay khoang bo'n thang mot lan, trongit nhat hai n3m. EPA se cung cap ket qua xetnghiem cac mau nvfdc ngam va cac tai lieukhac ve du* an cho cong chung qua cac ban tinva cung vdi cac tai lieu khac ve du* an, tai cacthu1 vi^n.

Be Biet Them Chi TietNhffng ndi cung dtp thdm tin ttfc. EPA cung cap dff kien tong quat ve ChiTdng Trinh Superfund, cungnhtf cac tit thong tin va ban tai lieu ky thuat ve Cdc Ban Dieu Hanh San Gabriel Valley (San GabrielValley Operable Units) tai cac dia diem sau dSy.


Superfund Records Center Rosemead Library95 Hawthorne Street, Room 403 (SFD 7C) 8800 Valley BoulevardSan Francisco, CA 94105 Rosemead, CA 91770(415) 536-2000 (626) 573-5220

Tin ttfc cung co sa*n tai cac Dia di€m Web cua EPA tai http://www.epa.gov (trang chu cua Van PhongTrung Tarn EPA), http://www.epa.gov/region09 (trang chu cua EPA Vung 9), va http://yosemite.epa.gov/r9/sfund/overview.nsf/ (khai quat ve dia diem Superfund).Li€n lacEPA: Lisa Hanusiak, Quan Ly Vien Dtf An Sufa Chifa, (415) 972-3152

Don Hodge, Dieu Phoi Vien Cpng Dong Tham Gia cua EPA: (415) 972-3240Dtfcfng day nhan tin Mien phi cho Van Phong Cong Dong Tham Gia cua EPA(tieng Anh va tieng Tay Ban Nha): (800) 231-3075

Dja phtfdng: City Engineer, City of San Gabriel: (626) 308-2800, so may phu 715Truyln thdng: Mark Merchant, Nhan Vien Bao Chi EPA Khu Vtfc Phia Nam California: (415) 947 4297


San Gabriel Va l ley , Area 3 Superfund Sites

6 Nhiem Ntfdc NgSmd vftng Valley

Dtf an giehg kiem tra ntfdc ngam Vung 3nam trong co gang to Idn de bao v$ nguoncung cap ntfdc cua San Gabriel Valley. Ntfdctrong Ltfu Vtfc San Gabriel cung cap khoang90% nguon cung cap ntfdc noi dia cho hdn mottrieu ctf dan d vung San Gabriel Valley. Nam1984, viec 6 nhiem nguon ntfdc ngam lan rongdo cac boa chat cong nghiep da khieh EPAphai them b6n vung d San Gabriel Valley (Cacvung 1 tdi 4) vao Danh Sach Lfu Tien Quoc Giave nhffng vung phe thai doc hai nhat trongntfdc. Vung 3 bao gom cac phan cua thanh pho'Alhambra, San Gabriel, Temple City, SanMarino, South Pasadena, va Rosemead. Stf 6nhiem ntfdc ngam la ket qua cua viec xtf ly vaxa chat thai sau nhieu thap nien, lam cac hcJpchat hffu cd de bay hdi (hay con goi la VOC),ngam vao trong dat va nu*0c ngam. Cac hdpchat hffu cd de bay hdi (VOC) thtfdng dtfdcdung de giat kho, lay sdn, ma kim loai, va laynhdn may moc. Cac chat 6 nhiem dtfdc timthay d Vung 3 bao gom trichloroethylene (TCE)va tetrachloroethylene (PCE) cua VOC.

Mac du co su" 6 nhiem, cac nha cung capnrfdc d San Gabriel Valley van tiep tuc cungcap ntfdc sach cho khach hang b^ng each dongcac gieng d nhi?ng vung bi 6 nhiem, xu* ly ntfdcde loai bo cac chat 6 nhiem, pha tron ntfdc dedap tfng cac tieu chuan ve ntfdc uong, va layntfdc ttf cac nha cung cap hoac cac cong ty tienich d vung lan can.

Ntfdc uong cua toi c6an toan khong?

C6! Toan bo ntfdc uongdo cac cd quan tien ich d cac (jj$ cong dongcua San Gabriel Valley cung cap deu daptfng dtfdc cac tieu chuan ve ntfdc uong cuaTieu Bang va Lien Bang.

Nghien Otu Vl llnh Kha Thi VaKilm Tra Stfa Chffa Vilng 3

Sau khi bo sung cac vung San GabrielValley vao Danh Sach t/u Tien Quoc Gia, EPAbat dau nghien ctfu, goi la Cuoc Nghien CtfuVe Tinh Kha Thi/Kiem Tra Stfa Chffa (RI7FS)de xac dinh tinh chat va mtfc do 6 nhiem dat vantfdc ngam, va nguy cd gay hai cho dan chung,xac dinh nguon 6 nhiem, lap ke hoach tren toanItfu vtfc de dinh ra cac ndi can tfu tien lam sachtrtfdc, va soan thao cac ke' hoach khac de lamsach vung 6 nhiem.

Nam 1999, EPA bat dau cupc nghien ctfuRI/FS cho Vung 3, va hien nay van dang nghienctfu cac nguon 6 nhiem tren toan vung. Mot socd sd thtfdng mai trong vung da hoan tat kiemtra khi do't trong long dat va bat dau kiem trantfdc ngam de xac dinh nguy cd 6 nhiem ntfdcngam d dtfdi cac cd sd cua ho. Giai doan ketiep, nhtf da ghi d phan tren, la dao cac giengkiem tra ntfdc ngam de thu thap dff lieu danhgia mtfc do 6 nhiem va moi lien he giffa stf 6nhiem vdi cac nguon dang nghi ngd trong vung.Vdi stf hdp tac cua Thanh Pho AUiambra, EPAse co g^ng dam bao an toan cho nguon ntfdcngam va bao v6 stfc khoe cho cac ctf dan trongvung San Gabriel Valley.

MAY 2003

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From page 2Results. EPA will take the first samples of

groundwater from the new wells once the wellsare completed and about every four monthsthereafter for at least two years. EPA will makethe results of the groundwater sampling availableto the public through newsletters, and along withother project documents, at the informationrepositories.

Groundwater Contamination in the ValleyThe Area 3 monitoring well project is part

of a larger effort to protect the water supply ofthe San Gabriel Valley. The San Gabriel Basinaquifer provides approximately 90% of thedomestic water supply for more than one millionresidents of the San Gabriel Valley. In 1984,widespread pollution of the underground watersource by industrial chemicals prompted the EPAto add four areas in the San Gabriel Valley (Areas1 through 4) to the National Priorities List of thecountry's most hazardous waste sites. Area 3includes parts of the cities of Alhambra, SanGabriel, Temple City, San Marino, South Pasa-dena, and Rosemead. The groundwater contami-nation is the result of decades of handling anddisposal practices that released volatile organiccompounds, or VOCs, into the soil and ground-water. VOCs are commonly used in dry clean-ing, paint stripping, metal plating, and machin-ery degreasing. Contaminants found in Area 3include the VOCs trichloroethylene (TCE) andtetrachloroethylene (PCE).

Despite the contamination, water suppliersin the San Gabriel Valley continue to providecustomers with clean water by shutting downwells in contaminated areas, treating water toremove contaminants, blending water to meetdrinking water standards, and obtaining water

Is my drinkingwater safe?

Yes! All drinking water it provided bywater utilities in San Gabriel Valleycommunities meets current Federal andState drinking water standards.

from neighboring suppliers or utilities.

Area 3 Remedial Investigation andFeasibility Study

After adding the San Gabriel Valley sites tothe National Priorities List, EPA began efforts,called the Remedial Investigation/FeasibilityStudy (RJ/FS), to determine the nature andextent of soil and groundwater contaminationand the potential for harm to the public, toidentify sources of contamination, to develop abasin-wide plan to set cleanup priorities, and todevelop alternatives for cleaning up the contami-nation.

EPA began the RI/FS for Area 3 in 1999and is currently searching for sources of contami-nation throughout the area. Several area busi-nesses have completed soil gas testing and arebeginning groundwater testing to determine thepotential for contamination of groundwaterbeneath their facilities. The next step, as notedabove, is to install groundwater monitoring wellsto collect data to help assess the extent of thecontamination and its relationship to suspectedsources in the area.

Figure 2: Typical Well Installation Site

Figura 2: Sitio Tipico de Instalacion dePozo

Hirih 2: Dia Diem Dao Gieng DienHmhU2 .•

Texto en espanol en las paginas 3 y 4Bin djch bing tieng Vi$t d trang 5-6

7-8

Printed on 30% Postconsumer Recycled / Recyclable Paper

U.S. Environmental Protection Agency, Region IX75 Hawthorne Street (SFD-3)San Francisco, CA 94105Attn: Don Hodge

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U.S. EPAPermit No. G-35

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If you did not receive this fact sheet in the mail and would like to be included on themailing list to receive future mailings about the Area 3 portion of the San Gabriel ValleySuperfund Sites, please fill out the coupon below and return to: Don Hodge, USEPA Region 9,75 Hawthorne St, SFD-3, San Francisco, CA 94105.

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